@import "https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,600;0,9..144,700;1,9..144,400&family=DM+Sans:wght@400;500;600&display=swap";:root{--coral:#e8533a;--coral-dark:#c9432b;--teal:#1b4f6b;--teal-light:#2a6b8f;--cream:#fdf8f3;--warm-white:#fffbf7;--ink:#1a1a2e;--muted:#6b7280;--border:#e5e0d8;--success:#16a34a;--warning:#d97706;--danger:#dc2626;font-family:DM Sans,sans-serif}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--warm-white);color:var(--ink)}button{cursor:pointer;background:0 0;border:none;font-family:inherit}input,select,textarea{outline:none;font-family:inherit}a{color:inherit;text-decoration:none}.btn-primary{background:var(--coral);color:#fff;cursor:pointer;border:none;border-radius:8px;align-items:center;gap:6px;padding:10px 20px;font-size:14px;font-weight:600;transition:background .2s,transform .1s;display:inline-flex}.btn-primary:hover{background:var(--coral-dark);transform:translateY(-1px)}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-outline{border:1.5px solid var(--border);color:var(--ink);cursor:pointer;border-radius:8px;align-items:center;gap:6px;padding:10px 20px;font-size:14px;font-weight:500;transition:border-color .2s,background .2s;display:inline-flex}.btn-outline:hover{border-color:var(--coral);color:var(--coral);background:#fef5f3}.btn-outline.sm{padding:6px 12px;font-size:13px}.btn-submit{background:var(--teal);color:#fff;cursor:pointer;border:none;border-radius:10px;align-items:center;gap:8px;padding:13px 28px;font-size:15px;font-weight:600;transition:background .2s,transform .15s;display:inline-flex}.btn-submit:hover{background:var(--teal-light);transform:translateY(-2px)}.w-full{justify-content:center;width:100%}.icon-btn{width:32px;height:32px;color:var(--muted);cursor:pointer;background:0 0;border:none;border-radius:8px;justify-content:center;align-items:center;transition:background .15s,color .15s;display:inline-flex}.icon-btn:hover{color:var(--ink);background:#f3f4f6}.icon-btn.sm{width:26px;height:26px}.landing-root{flex-direction:column;min-height:100vh;display:flex}.landing-nav{z-index:100;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);background:#fdf8f3eb;position:sticky;top:0}.nav-inner{justify-content:space-between;align-items:center;max-width:1140px;margin:0 auto;padding:14px 24px;display:flex}.nav-logo{color:var(--coral);align-items:center;gap:8px;font-family:Fraunces,serif;font-size:22px;font-weight:700;display:flex}.nav-links{align-items:center;gap:20px;display:flex}.nav-links a{color:var(--muted);font-size:14px;transition:color .2s}.nav-links a:hover{color:var(--coral)}.hero{background:var(--cream);align-items:center;max-width:100vw;min-height:88vh;padding:60px 24px;display:flex;position:relative;overflow:hidden}.hero-inner{align-items:center;gap:60px;width:100%;max-width:1140px;margin:0 auto;display:flex}.hero-bg-shapes{pointer-events:none;position:absolute;inset:0}.shape{background:var(--coral);opacity:.06;border-radius:50%;position:absolute}.s1{width:600px;height:600px;top:-200px;right:-150px}.s2{background:var(--teal);opacity:.07;width:300px;height:300px;bottom:-100px;left:-80px}.s3{opacity:.04;width:180px;height:180px;top:40%;left:30%}.hero-content{z-index:1;flex:1;max-width:540px}.hero-badge{background:var(--coral);color:#fff;letter-spacing:.5px;border-radius:100px;margin-bottom:24px;padding:5px 14px;font-size:12px;font-weight:600;display:inline-block}.hero-content h1{color:var(--ink);margin-bottom:20px;font-family:Fraunces,serif;font-size:clamp(38px,5vw,62px);line-height:1.1}.hero-content h1 em{color:var(--coral);font-style:italic}.hero-content p{color:var(--muted);margin-bottom:36px;font-size:16px;line-height:1.7}.hero-ctas{flex-wrap:wrap;gap:12px;display:flex}.btn-hero-primary{background:var(--coral);color:#fff;cursor:pointer;border:none;border-radius:10px;padding:14px 28px;font-size:15px;font-weight:600;transition:background .2s,transform .15s}.btn-hero-primary:hover{background:var(--coral-dark);transform:translateY(-2px)}.btn-hero-outline{color:var(--teal);border:2px solid var(--teal);cursor:pointer;background:0 0;border-radius:10px;padding:14px 28px;font-size:15px;font-weight:600;transition:all .2s}.btn-hero-outline:hover{background:var(--teal);color:#fff}.hero-visual{flex:1;justify-content:center;align-items:center;min-height:380px;display:flex;position:relative}.ill-circle{background:linear-gradient(135deg, var(--teal) 0%, var(--teal-light) 100%);opacity:.12;border-radius:50%;width:260px;height:260px}.ill-dots{grid-template-columns:repeat(3,1fr);gap:10px;display:grid;position:absolute;top:20px;right:-20px}.dot{background:var(--coral);border-radius:50%;width:6px;height:6px}.hero-card{color:var(--ink);background:#fff;border-radius:12px;align-items:center;gap:8px;padding:10px 16px;font-size:13px;font-weight:500;animation:4s ease-in-out infinite float;display:flex;position:absolute;box-shadow:0 4px 20px #0000001a}.hc-icon{color:var(--coral)}.hc1{animation-delay:0s;top:5%;left:0}.hc2{animation-delay:1.2s;bottom:15%;left:-10px}.hc3{animation-delay:2.4s;top:50%;right:0}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.features{background:#fff;padding:80px 24px}.features-inner{max-width:1100px;margin:0 auto}.section-label{color:var(--coral);text-transform:uppercase;letter-spacing:1.5px;margin-bottom:12px;font-size:12px;font-weight:700}.features-inner h2,.about-text h2{color:var(--ink);margin-bottom:48px;font-family:Fraunces,serif;font-size:clamp(26px,3vw,40px);line-height:1.2}.feat-grid{grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:20px;display:grid}.feat-card{border:1px solid var(--border);background:var(--warm-white);border-radius:16px;padding:28px 24px;transition:box-shadow .2s,transform .2s}.feat-card:hover{transform:translateY(-3px);box-shadow:0 8px 32px #00000014}.feat-icon{width:48px;height:48px;color:var(--coral);background:linear-gradient(135deg,#fef5f3,#fde8e4);border-radius:12px;justify-content:center;align-items:center;margin-bottom:16px;display:flex}.feat-card h3{margin-bottom:8px;font-size:16px;font-weight:700}.feat-card p{color:var(--muted);font-size:14px;line-height:1.6}.about{background:var(--cream);padding:80px 24px}.about-inner{grid-template-columns:1fr 1fr;align-items:center;gap:60px;max-width:1100px;margin:0 auto;display:grid}.about-text p{color:var(--muted);margin-bottom:16px;font-size:15px;line-height:1.7}.about-text h2{margin-bottom:24px}.about-text .btn-primary{margin-top:16px}.about-stats{flex-direction:column;gap:16px;display:flex}.stat-card{border:1px solid var(--border);background:#fff;border-radius:16px;padding:24px 28px}.stat-n{color:var(--coral);font-family:Fraunces,serif;font-size:40px;font-weight:700;display:block}.stat-label{color:var(--muted);margin-top:4px;font-size:14px;display:block}.landing-footer{background:var(--ink);color:#fff;margin-top:auto;padding:28px 24px}.footer-inner{color:#ffffff80;justify-content:space-between;align-items:center;max-width:1100px;margin:0 auto;font-size:13px;display:flex}.footer-inner .nav-logo{color:#fff;font-size:18px}.portal-root{background:var(--warm-white);min-height:100vh}.portal-header{border-bottom:1px solid var(--border);z-index:50;background:#fff;flex-wrap:wrap;align-items:center;gap:16px;padding:14px 24px;display:flex;position:sticky;top:0}.back-btn{color:var(--muted);cursor:pointer;background:0 0;border:none;align-items:center;gap:6px;font-size:13px;transition:color .2s;display:inline-flex}.back-btn:hover{color:var(--coral)}.student-chip{background:var(--cream);border:1px solid var(--border);color:var(--teal);border-radius:100px;margin-left:auto;padding:6px 14px;font-size:13px;font-weight:500}.portal-content{max-width:820px;margin:0 auto;padding:32px 24px}.portal-content h2{margin-bottom:24px;font-family:Fraunces,serif;font-size:28px}.login-card{text-align:center;background:#fff;border-radius:20px;flex-direction:column;align-items:center;gap:16px;max-width:400px;margin:60px auto;padding:40px 36px;display:flex;box-shadow:0 8px 40px #0000001a}.login-icon{width:72px;height:72px;color:var(--coral);background:linear-gradient(135deg,#fef5f3,#fde8e4);border-radius:20px;justify-content:center;align-items:center;display:flex}.teacher-icon{color:var(--teal);background:linear-gradient(135deg,#e8f4f9,#d0eaf4)}.login-card h2{font-family:Fraunces,serif;font-size:26px}.login-card p{color:var(--muted);font-size:14px}.pin-inputs{gap:12px;margin:8px 0;display:flex}.pin-box{border:2px solid var(--border);text-align:center;width:56px;height:64px;color:var(--ink);border-radius:12px;font-size:28px;font-weight:700;transition:border-color .2s}.pin-box:focus{border-color:var(--coral)}.hint-text{color:var(--muted);font-size:12px}.error-msg{color:var(--danger);background:#fef2f2;border:1px solid #fecaca;border-radius:8px;align-items:center;gap:6px;width:100%;padding:8px 12px;font-size:13px;display:flex}.practice-list{flex-direction:column;gap:16px;display:flex}.practice-card{border:1px solid var(--border);background:#fff;border-radius:16px;padding:20px 24px;transition:box-shadow .2s}.practice-card:hover{box-shadow:0 4px 20px #00000012}.practice-card.done{opacity:.7}.pc-top{justify-content:space-between;align-items:center;margin-bottom:10px;display:flex}.practice-card h3{margin-bottom:6px;font-size:18px;font-weight:700}.practice-card p{color:var(--muted);margin-bottom:14px;font-size:14px;line-height:1.5}.pc-meta{color:var(--muted);flex-wrap:wrap;gap:16px;margin-bottom:14px;font-size:12px;display:flex}.pc-meta span{align-items:center;gap:4px;display:flex}.subject-badge{border-radius:100px;padding:4px 12px;font-size:12px;font-weight:600}.sb-matemáticas{color:#6d28d9;background:#ede9fe}.sb-español{color:#a16207;background:#fef9c3}.sb-ciencias{color:#15803d;background:#dcfce7}.sb-estudios{color:#0369a1;background:#e0f2fe}.sb-inglés{color:#be123c;background:#ffe4e6}.done-badge{color:var(--success);align-items:center;gap:4px;font-size:12px;font-weight:600;display:flex}.empty-state{text-align:center;color:var(--muted);flex-direction:column;align-items:center;gap:16px;padding:60px 24px;display:flex}.practice-header{margin-bottom:28px}.practice-header h2{margin-bottom:8px;font-family:Fraunces,serif;font-size:26px}.practice-header p{color:var(--muted);margin-bottom:12px;font-size:14px;line-height:1.6}.math-warning{color:#92400e;background:#fffbeb;border:1px solid #fde68a;border-radius:10px;align-items:flex-start;gap:8px;padding:12px 16px;font-size:13px;display:flex}.questions-list{flex-direction:column;gap:20px;margin-bottom:28px;display:flex}.question-card{border:1px solid var(--border);background:#fff;border-radius:16px;padding:24px}.q-header{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.q-num{color:var(--coral);text-transform:uppercase;letter-spacing:.5px;font-size:12px;font-weight:700}.q-pts{color:var(--muted);background:var(--cream);border-radius:100px;padding:3px 10px;font-size:12px}.q-text{margin-bottom:16px;font-size:16px;font-weight:500;line-height:1.5}.relative{position:relative}.secure-textarea{border:1.5px solid var(--border);resize:vertical;background:var(--warm-white);border-radius:10px;width:100%;padding:14px 16px;font-size:15px;line-height:1.6;transition:border-color .2s}.secure-textarea:focus{border-color:var(--teal)}.anti-cheat-badge{color:var(--muted);border:1px solid var(--border);background:#ffffffe6;border-radius:100px;align-items:center;gap:4px;padding:2px 8px;font-size:10px;display:flex;position:absolute;bottom:8px;right:10px}.options-list{flex-direction:column;gap:10px;display:flex}.option-label{border:1.5px solid var(--border);cursor:pointer;border-radius:10px;align-items:center;gap:12px;padding:12px 16px;font-size:14px;transition:all .15s;display:flex}.option-label input{display:none}.option-label:hover{border-color:var(--teal);background:#f0f9ff}.option-label.selected{border-color:var(--teal);color:var(--teal);background:#e0f2fe;font-weight:500}.opt-letter{border:1.5px solid;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:26px;height:26px;font-size:12px;font-weight:700;display:flex}.submit-row{border-top:1px solid var(--border);background:#fff;border-radius:0 0 16px 16px;justify-content:space-between;align-items:center;padding:20px 24px;display:flex;position:sticky;bottom:0}.answered-count{color:var(--muted);font-size:13px}.submit-success{text-align:center;flex-direction:column;align-items:center;gap:16px;max-width:400px;margin:80px auto;padding:24px;display:flex}.success-icon{color:var(--success)}.submit-success h2{font-family:Fraunces,serif;font-size:28px}.submit-success p{color:var(--muted);font-size:15px;line-height:1.6}.teacher-tabs{background:var(--cream);border-radius:10px;gap:4px;margin-left:auto;padding:4px;display:flex}.tab-btn{color:var(--muted);cursor:pointer;background:0 0;border:none;border-radius:8px;align-items:center;gap:6px;padding:8px 16px;font-size:13px;font-weight:500;transition:all .15s;display:flex}.section-topbar{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.section-topbar h2{font-family:Fraunces,serif;font-size:24px}.form-card{border:1px solid var(--border);background:#fff;border-radius:16px;margin-bottom:24px;padding:28px}.form-card h3{margin-bottom:20px;font-size:18px;font-weight:700}.form-grid{grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px;display:grid}.field{flex-direction:column;gap:6px;display:flex}.field.full{grid-column:1/-1}.field label{color:var(--ink);font-size:13px;font-weight:600}.field input,.field select,.field textarea{border:1.5px solid var(--border);color:var(--ink);background:var(--warm-white);border-radius:10px;padding:10px 14px;font-size:14px;transition:border-color .2s}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--teal)}.pin-field .pin-row{gap:8px;display:flex}.field-inline{align-items:center;gap:6px;font-size:13px;display:flex}.field-inline input{border:1.5px solid var(--border);border-radius:8px;padding:4px 8px}.assign-grid{flex-wrap:wrap;gap:8px;display:flex}.assign-chip{border:1.5px solid var(--border);cursor:pointer;transition:all .15px;border-radius:100px;align-items:center;gap:6px;padding:6px 14px;font-size:13px;display:flex}.assign-chip input{display:none}.assign-chip.selected{border-color:var(--teal);color:var(--teal);background:#e0f2fe;font-weight:600}.student-table{flex-direction:column;gap:10px;display:flex}.student-row{border:1px solid var(--border);background:#fff;border-radius:12px;align-items:center;gap:14px;padding:14px 20px;display:flex}.sr-avatar{background:linear-gradient(135deg, var(--teal), var(--teal-light));color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-size:14px;font-weight:700;display:flex}.sr-avatar.sm{width:32px;height:32px;font-size:11px}.sr-info{flex-direction:column;flex:1;gap:2px;display:flex}.sr-info strong{font-size:15px}.sr-info span{color:var(--muted);font-size:12px}.sr-pin{color:var(--muted);background:var(--cream);border-radius:100px;align-items:center;gap:5px;padding:5px 12px;font-size:13px;display:flex}.questions-section{border-top:1px solid var(--border);margin-top:20px;padding-top:20px}.qs-header h4{font-size:15px;font-weight:700}.math-info{color:#92400e;background:#fffbeb;border:1px solid #fde68a;border-radius:8px;align-items:center;gap:6px;margin-bottom:12px;padding:8px 12px;font-size:12px;display:flex}.q-builder{border:1px solid var(--border);background:var(--cream);border-radius:12px;margin-bottom:12px;padding:16px}.qb-header{color:var(--muted);justify-content:space-between;align-items:center;margin-bottom:10px;font-size:13px;font-weight:600;display:flex}.qb-actions{align-items:center;gap:10px;display:flex}.q-input{border:1.5px solid var(--border);resize:vertical;background:#fff;border-radius:10px;width:100%;margin-bottom:12px;padding:10px 14px;font-size:14px}.q-input:focus{border-color:var(--teal)}.options-builder{flex-direction:column;gap:8px;display:flex}.opt-row input[type=radio]{width:16px;height:16px;accent-color:var(--teal);flex-shrink:0}.opt-row input[type=text]{border:1.5px solid var(--border);border-radius:8px;flex:1;padding:8px 12px;font-size:13px}.review-section-title{color:var(--muted);margin:20px 0 12px;font-size:15px;font-weight:700}.review-card{border:1px solid var(--border);background:#fff;border-radius:14px;margin-bottom:12px;overflow:hidden}.review-card.pending{border-left:3px solid var(--warning)}.review-card.reviewed{border-left:3px solid var(--success)}.review-header{cursor:pointer;justify-content:space-between;align-items:center;padding:14px 20px;transition:background .15s;display:flex}.review-header:hover{background:var(--cream)}.rh-left{align-items:center;gap:12px;display:flex}.rh-left>div{flex-direction:column;gap:2px;display:flex}.rh-left strong{font-size:14px}.rh-sub{color:var(--muted);font-size:12px}.rh-right{align-items:center;gap:10px;display:flex}.score-badge{color:#15803d;background:#dcfce7;border-radius:100px;padding:4px 12px;font-size:12px;font-weight:700}.pending-badge{color:#a16207;background:#fef9c3;border-radius:100px;padding:4px 12px;font-size:12px;font-weight:700}.flag-badge{color:var(--danger);background:#fef2f2;border-radius:100px;align-items:center;gap:4px;padding:4px 10px;font-size:11px;font-weight:600;display:flex}.review-body{border-top:1px solid var(--border);background:var(--cream);padding:20px}.review-date{color:var(--muted);margin-bottom:12px;font-size:12px}.cheat-warning{color:var(--danger);background:#fef2f2;border:1px solid #fecaca;border-radius:10px;align-items:center;gap:8px;margin-bottom:16px;padding:10px 14px;font-size:13px;display:flex}.review-questions{flex-direction:column;gap:12px;margin-bottom:20px;display:flex}.rq-card{border:1px solid var(--border);background:#fff;border-radius:10px;padding:14px 16px}.rq-header{color:var(--muted);justify-content:space-between;margin-bottom:8px;font-size:13px;display:flex}.rq-pts{font-size:12px}.rq-answer{border-radius:8px;padding:10px 14px;font-size:14px}.rq-answer.mc{align-items:center;gap:8px;display:flex}.rq-answer.correct{color:#15803d;background:#dcfce7}.rq-answer.wrong{color:var(--danger);background:#fef2f2}.rq-answer.open{background:var(--cream);color:var(--ink);line-height:1.6}.rq-answer.open em{color:var(--muted);font-style:italic}.review-actions{flex-direction:column;gap:12px;display:flex}.score-input-row{align-items:center;gap:12px;display:flex}.score-input-row label{font-size:13px;font-weight:600}.score-input-row input{border:1.5px solid var(--border);text-align:center;border-radius:8px;width:80px;padding:8px 10px;font-size:15px;font-weight:700}.teacher-note{color:#92400e;background:#fffbeb;border-radius:8px;align-items:flex-start;gap:8px;margin-top:12px;padding:10px 14px;font-size:13px;display:flex}@media (width<=768px){.hero-inner{flex-direction:column}.hero-content{text-align:center}.hero-ctas{justify-content:center}.hero-visual{display:none}.about-inner,.form-grid{grid-template-columns:1fr}.teacher-tabs{flex-wrap:wrap;font-size:12px}.tab-btn{padding:7px 10px}.nav-links .btn-outline{display:none}}.flex-center{justify-content:center;align-items:center;min-height:60vh;display:flex}.py-12{padding-top:3rem;padding-bottom:3rem}.ml-auto{margin-left:auto}@keyframes spin{to{transform:rotate(360deg)}}.input-icon-wrap{position:relative}.input-icon{color:var(--muted);pointer-events:none;position:absolute;top:50%;left:12px;transform:translateY(-50%)}.input-icon-wrap input{width:100%;padding-left:36px!important}.field input[type=email],.field input[type=password]{border:1.5px solid var(--border);background:var(--warm-white);border-radius:10px;width:100%;padding:10px 14px;font-size:14px;transition:border-color .2s}.field input[type=email]:focus,.field input[type=password]:focus{border-color:var(--teal)}.lesson-indicators{flex-wrap:wrap;gap:6px;margin-bottom:12px;display:flex}.lesson-chip{background:var(--cream);border:1px solid var(--border);color:var(--muted);border-radius:100px;align-items:center;gap:4px;padding:3px 10px;font-size:11px;display:flex}.lesson-link-badge{color:var(--teal);margin-bottom:8px;font-size:12px}.lesson-preview{border-top:1px solid var(--border);margin-top:12px;padding-top:12px}.lesson-text-preview{background:var(--cream);color:var(--ink);border-radius:10px;padding:16px;font-size:14px;line-height:1.7}.yt-preview{margin-top:12px}.upload-zone{border:2px dashed var(--border);text-align:center;background:var(--cream);border-radius:10px;padding:20px}.upload-label{cursor:pointer;color:var(--teal);border:1.5px solid var(--teal);border-radius:8px;align-items:center;gap:8px;padding:10px 20px;font-size:14px;font-weight:500;transition:all .2s;display:inline-flex}.upload-label:hover{background:var(--teal);color:#fff}.upload-done{align-items:center;gap:10px;font-size:14px;display:flex}.text-teal{color:var(--teal)}.text-coral{color:var(--coral)}.ai-gen-section{border-top:1px solid var(--border);flex-direction:column;gap:12px;margin-top:20px;padding-top:20px;display:flex}.ai-gen-header{color:var(--coral);align-items:center;gap:8px;font-size:14px;font-weight:600;display:flex}.gen-questions-preview{background:var(--cream);border-radius:10px;flex-direction:column;gap:10px;padding:16px;display:flex}.gen-q-card{border:1px solid var(--border);background:#fff;border-radius:8px;padding:12px;font-size:13px}.gen-q-card p{margin:6px 0}.gen-q-card ul{margin:6px 0 0 16px}.gen-q-card .correct-opt{color:var(--success);font-weight:600}.lesson-view-card{border:1px solid var(--border);background:#fff;border-radius:16px;margin-bottom:20px;padding:28px}.lesson-view-card h2{margin-bottom:20px;font-family:Fraunces,serif;font-size:26px}.lesson-section{margin-bottom:20px}.lesson-section-header{color:var(--teal);cursor:pointer;justify-content:space-between;align-items:center;margin-bottom:12px;font-size:15px;font-weight:700;display:flex}.yt-embed-full{border-radius:12px;overflow:hidden}.library-upload-zone{border:1px solid var(--border);background:#fff;border-radius:16px;align-items:center;gap:20px;margin-bottom:24px;padding:24px;display:flex}.lup-option{flex:1;align-items:center;gap:14px;display:flex}.lup-icon{color:var(--teal);flex-shrink:0;font-size:28px}.lup-text{flex-direction:column;flex:1;gap:2px;display:flex}.lup-text strong{font-size:14px}.lup-text span{color:var(--muted);font-size:12px}.lup-divider{color:var(--muted);padding:0 8px;font-size:13px}.upload-progress-card{border:1px solid var(--border);background:#fff;border-radius:14px;margin-bottom:24px;padding:20px}.upc-header{justify-content:space-between;align-items:center;margin-bottom:14px;display:flex}.upc-title{font-size:14px;font-weight:600}.upc-summary{gap:8px;display:flex}.badge-success{color:#15803d;background:#dcfce7;border-radius:100px;padding:3px 10px;font-size:12px;font-weight:600}.badge-warn{color:#a16207;background:#fef9c3;border-radius:100px;padding:3px 10px;font-size:12px;font-weight:600}.badge-error{color:var(--danger);background:#fef2f2;border-radius:100px;padding:3px 10px;font-size:12px;font-weight:600}.upc-list{flex-direction:column;gap:6px;max-height:300px;display:flex;overflow-y:auto}.upc-item{background:var(--cream);border-radius:8px;align-items:center;gap:10px;padding:8px 12px;font-size:13px;display:flex}.upc-done{background:#f0fdf4}.upc-error{background:#fef2f2}.upc-skipped{opacity:.6}.upc-uploading{background:#eff6ff}.upc-status-icon{color:var(--success);flex-shrink:0;display:flex}.upc-name{text-overflow:ellipsis;white-space:nowrap;flex:1;font-weight:500;overflow:hidden}.upc-meta{color:var(--muted);white-space:nowrap;font-size:11px}.upc-error-text{color:var(--danger);font-size:11px}.library-filters{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:20px;display:flex}.filter-group{align-items:center;gap:6px;display:flex;position:relative}.filter-icon{color:var(--muted);flex-shrink:0}.filter-input,.filter-group select{border:1.5px solid var(--border);color:var(--ink);background:#fff;border-radius:8px;padding:8px 12px;font-family:inherit;font-size:13px;transition:border-color .2s}.filter-input{min-width:200px;padding-left:10px}.filter-input:focus,.filter-group select:focus{border-color:var(--teal);outline:none}.library-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;display:grid}.lib-card{border:1.5px solid var(--border);background:#fff;border-radius:16px;flex-direction:column;gap:10px;padding:20px;transition:box-shadow .2s,transform .15s;display:flex}.lib-card:hover{transform:translateY(-2px);box-shadow:0 6px 24px #00000017}.lib-card.lib-active{border-color:#86efac}.lib-card.lib-inactive{opacity:.85}.lib-card-top{justify-content:space-between;align-items:center;display:flex}.lib-card-icon{color:var(--teal);opacity:.6}.lib-card-title{color:var(--ink);font-size:14px;font-weight:700;line-height:1.4}.lib-card-file{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;font-size:11px;overflow:hidden}.lib-card-assigned{color:var(--muted);align-items:center;gap:5px;font-size:12px;display:flex}.lib-card-actions{flex-wrap:wrap;gap:6px;margin-top:4px;display:flex}.lib-card-actions a{font-size:13px}.status-pill{border-radius:100px;padding:3px 10px;font-size:11px;font-weight:600}.pill-active{color:#15803d;background:#dcfce7}.pill-inactive{background:var(--cream);color:var(--muted)}.btn-danger-outline{color:var(--danger)!important;border-color:#fca5a5!important}.btn-danger-outline:hover{background:#fef2f2!important}.modal-overlay{z-index:200;background:#0006;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.modal-card{background:#fff;border-radius:20px;flex-direction:column;width:100%;max-width:520px;max-height:85vh;display:flex;box-shadow:0 20px 60px #0003}.modal-header{justify-content:space-between;align-items:center;padding:20px 24px 0;display:flex}.modal-header h3{font-family:Fraunces,serif;font-size:20px}.modal-subtitle{color:var(--muted);padding:8px 24px 0;font-size:13px}.modal-footer{border-top:1px solid var(--border);justify-content:flex-end;gap:10px;padding:16px 24px 20px;display:flex}.assign-chip{position:relative}.chip-grade{color:var(--muted);margin-left:4px;font-size:10px}.select-all{background:var(--cream);cursor:pointer;color:var(--teal);border-style:dashed;font-size:12px}@media (width<=768px){.library-upload-zone{flex-direction:column}.lup-divider{display:none}.library-grid{grid-template-columns:1fr}.library-filters{flex-direction:column;align-items:stretch}.filter-input{min-width:unset;width:100%}}.modal-loading{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:20px;padding:60px 24px;display:flex}.ai-spinner{color:var(--coral)}.sparkle-spin{animation:1.5s ease-in-out infinite sparkle}@keyframes sparkle{0%,to{opacity:1;transform:scale(1)rotate(0)}50%{opacity:.7;transform:scale(1.2)rotate(20deg)}}.ai-progress-bar{background:var(--border);border-radius:100px;width:280px;height:6px;overflow:hidden}.ai-progress-fill{background:linear-gradient(90deg, var(--coral), var(--teal));border-radius:100px;height:100%;transition:width 1s}.fill-30{width:30%}.fill-70{width:70%}.ai-generated-banner{border:1px solid var(--border);color:var(--ink);background:linear-gradient(135deg,#fef5f3,#e0f2fe);border-radius:10px;align-items:center;gap:10px;padding:12px 16px;font-size:13px;display:flex}.ai-generated-banner .btn-outline{margin-left:auto}.create-practice-meta{grid-template-columns:1fr 1fr;gap:14px;margin-bottom:20px;display:grid}.create-practice-meta .field.full{grid-column:1/-1}.create-practice-meta input,.create-practice-meta textarea,.create-practice-meta select{border:1.5px solid var(--border);background:var(--warm-white);border-radius:10px;width:100%;padding:10px 14px;font-family:inherit;font-size:14px;transition:border-color .2s}.create-practice-meta input:focus,.create-practice-meta textarea:focus{border-color:var(--teal);outline:none}.btn-primary.sm{padding:6px 12px;font-size:12px}.math-graphics-notice{color:#1e40af;background:#eff6ff;border:1px solid #bfdbfe;border-radius:10px;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:16px;padding:12px 16px;font-size:13px;display:flex}.math-graphics-notice .btn-outline{margin-left:auto}.page-images-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px;margin-bottom:16px;display:grid}.page-thumb{border:2px solid var(--border);cursor:pointer;border-radius:10px;flex-direction:column;transition:border-color .2s,transform .15s;display:flex;overflow:hidden}.page-thumb:hover{border-color:var(--teal);transform:translateY(-2px)}.page-thumb img{object-fit:cover;width:100%;display:block}.page-thumb span{text-align:center;color:var(--muted);background:var(--cream);padding:4px;font-size:11px}.q-image-preview{border:1.5px solid var(--border);border-radius:10px;margin-bottom:12px;position:relative;overflow:hidden}.q-image-preview img{object-fit:contain;background:#f8f9fa;width:100%;max-height:400px;display:block}.remove-img-btn{color:#fff;cursor:pointer;background:#0009;border:none;border-radius:6px;align-items:center;gap:4px;padding:4px 8px;font-family:inherit;font-size:11px;display:flex;position:absolute;top:8px;right:8px}.remove-img-btn:hover{background:#dc2626cc}.active-img-btn{color:var(--teal)!important;background:#e0f2fe!important}.student-q-image{border:1.5px solid var(--border);border-radius:10px;margin-bottom:14px;overflow:hidden}.student-q-image img{object-fit:contain;background:#f8f9fa;width:100%;display:block}.img-summary-banner{color:var(--ink);background:#f0fdf4;border:1.5px solid #86efac;border-radius:12px;align-items:flex-start;gap:12px;margin-top:12px;padding:14px 18px;font-size:13px;display:flex}.img-exam-list{flex-wrap:wrap;gap:6px;margin-top:8px;display:flex}.exam-chip{color:#15803d;background:#fff;border:1px solid #86efac;border-radius:100px;padding:2px 10px;font-size:11px;font-weight:500}.portal-header{border-bottom:1px solid var(--border);z-index:50;background:#fff;position:sticky;top:0}.ph-desktop{align-items:center;gap:8px;padding:10px 20px;display:flex}.ph-mobile{display:none}.ph-mobile-top{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:10px 16px;display:flex}.ph-mobile-tabs{width:100%;display:flex}.ph-mobile-tabs .tab-btn{position:relative}.portal-header .back-btn{color:var(--muted);white-space:nowrap;border-radius:8px;flex-shrink:0;align-items:center;gap:5px;min-height:auto;padding:6px 10px;font-size:13px;transition:color .2s,background .15s;display:inline-flex}.portal-header .back-btn:hover{color:var(--coral);background:#fef5f3}.teacher-tabs{background:var(--cream);border-radius:10px;gap:2px;margin:0 auto;padding:3px;display:flex}.tab-btn{color:var(--muted);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-radius:8px;align-items:center;gap:6px;padding:8px 14px;font-size:13px;font-weight:500;transition:all .15s;display:flex;position:relative}.tab-btn.active{color:var(--teal);background:#fff;box-shadow:0 2px 8px #00000014}.tab-btn:hover:not(.active){color:var(--ink)}.tab-badge{background:var(--coral);color:#fff;text-align:center;border-radius:100px;min-width:18px;padding:1px 6px;font-size:11px;font-weight:700}@media (width<=768px){.nav-links{display:none!important}.nav-inner{padding:10px 16px}.nav-inner .btn-outline{padding:6px 12px;font-size:12px}.hero-inner{flex-direction:column}.hero-content{text-align:center}.hero-ctas{justify-content:center}.hero-visual{display:none}.about-inner{grid-template-columns:1fr}.portal-header{padding:0!important}.ph-desktop{display:none!important}.ph-mobile{width:100%!important;display:block!important}.ph-mobile-tabs{border-top:1px solid var(--border)!important;background:#fff!important;border-bottom:none!important;border-radius:0!important;justify-content:space-between!important;gap:0!important;width:100%!important;padding:0!important;display:flex!important}.ph-mobile-tabs .tab-btn{box-shadow:none!important;min-height:52px!important;color:var(--muted)!important;background:0 0!important;border-bottom:3px solid #0000!important;border-radius:0!important;flex-direction:column!important;flex:1 1 0!important;justify-content:center!important;align-items:center!important;gap:0!important;padding:10px 0 8px!important;font-size:0!important;transition:border-color .15s,color .15s!important;display:flex!important}.ph-mobile-tabs .tab-btn.active{box-shadow:none!important;border-bottom:3px solid var(--coral)!important;color:var(--coral)!important;background:0 0!important}.ph-mobile-tabs .tab-btn svg{flex-shrink:0!important;width:22px!important;height:22px!important}.ph-mobile-tabs .tab-badge{min-width:14px;padding:1px 4px;font-size:9px;position:absolute;top:4px;right:4px}.form-grid{grid-template-columns:1fr}.form-actions{flex-direction:column}.form-actions button{width:100%}.library-upload-zone{flex-direction:column}.lup-divider{display:none}.lup-option{width:100%}input,select,textarea{font-size:16px!important}button,.btn-primary,.btn-outline,.icon-btn,.assign-chip{min-height:auto!important}.hero{align-items:center;min-height:100vh;padding:0 16px;display:flex}.footer-inner{text-align:center;flex-direction:column;gap:10px}.login-card{margin:28px auto;padding:28px 20px}.portal-content{padding:20px 16px}.student-chip{text-overflow:ellipsis;white-space:nowrap;max-width:55vw;padding:5px 10px;font-size:12px;overflow:hidden}.section-topbar{flex-direction:column;align-items:flex-start;gap:10px}.section-topbar>button{justify-content:center;width:100%}.student-row{flex-wrap:wrap;gap:10px;padding:12px 14px}.submit-row{flex-direction:column;align-items:stretch;gap:12px;padding:14px 16px}.submit-row .btn-submit{justify-content:center;width:100%}.answered-count{text-align:center}.practice-card,.question-card{padding:16px}.form-card{padding:20px 16px}.review-header{flex-wrap:wrap;gap:8px}.rh-left{flex:1;min-width:0}.rh-right{flex-wrap:wrap;justify-content:flex-end;gap:6px}.create-practice-meta{grid-template-columns:1fr}.yt-embed-full iframe{height:210px!important}.modal-overlay{padding:12px}}@media (width<=480px){.library-grid{grid-template-columns:1fr!important}.lib-card-actions{flex-direction:column}.lib-card-actions button{width:100%}.library-filters{flex-direction:column}.filter-group{width:100%}.modal-card{max-width:95%;margin:.5rem}.modal-footer{flex-direction:column}.modal-footer button{width:100%}.hero-content h1{font-size:30px}.hero-badge{font-size:11px}.btn-hero-primary,.btn-hero-outline{width:100%;padding:12px 18px;font-size:14px}.hero-ctas{flex-direction:column}.pin-box{width:48px;height:58px;font-size:24px}.pin-inputs{gap:8px}.stat-n{font-size:32px}.rh-left>div strong{font-size:13px}.rh-sub{font-size:11px}.score-badge,.pending-badge,.flag-badge{padding:3px 8px;font-size:11px}.sr-info strong{font-size:14px}.sr-pin{font-size:12px}.login-card{padding:24px 16px}}@media (width>=769px) and (width<=1024px){.hero-inner,.about-inner{gap:32px}.hero-content h1{font-size:clamp(32px,4vw,50px)}.feat-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}.portal-content{max-width:100%;padding:24px 20px}.nav-inner{padding:14px 20px}.nav-links{gap:14px}.tab-btn{padding:8px 10px;font-size:12px}.section-topbar h2{font-size:20px}}.math-sandbox{border:1.5px solid var(--border);background:#fff;border-radius:12px;margin-top:8px;overflow:hidden}.sandbox-mode-bar{background:var(--cream);border-bottom:1px solid var(--border);align-items:center;gap:4px;padding:8px 10px;display:flex}.sandbox-mode-btn{color:var(--muted);cursor:pointer;background:0 0;border:none;border-radius:7px;padding:5px 14px;font-size:13px;font-weight:500;transition:all .15s}.sandbox-mode-btn.active{color:var(--teal);background:#fff;box-shadow:0 1px 4px #0000001a}.sandbox-secure-badge{color:var(--muted);white-space:nowrap;align-items:center;gap:4px;margin-left:auto;font-size:11px;display:flex}.sandbox-textarea{resize:vertical;width:100%;min-height:140px;box-shadow:none!important;border:none!important;border-radius:0!important;padding:14px!important}.sandbox-draw-area{flex-direction:column;display:flex}.sandbox-toolbar{border-bottom:1px solid var(--border);background:#f5f5f4;flex-wrap:wrap;align-items:center;gap:6px;padding:8px 10px;display:flex;overflow-x:auto}.sb-tool-group{border-right:1px solid #e0e0e0;align-items:center;gap:3px;padding-right:10px;display:flex}.sb-tool-group:last-child{border-right:none;padding-right:0}.sb-tool-btn{cursor:pointer;color:#555;background:0 0;border:1.5px solid #0000;border-radius:8px;justify-content:center;align-items:center;width:34px;height:34px;transition:all .12s;display:flex}.sb-tool-btn:hover{color:var(--ink);border-color:var(--border);background:#fff}.sb-tool-btn.active{color:var(--teal);border-color:var(--teal);background:#fff;box-shadow:0 1px 4px #0000001a}.sb-tool-btn.sb-danger:hover{color:#dc2626;background:#fff0ee;border-color:#fca5a5}.sb-color-btn{cursor:pointer;border:2.5px solid #0000;border-radius:50%;flex-shrink:0;width:22px;height:22px;transition:transform .12s,box-shadow .12s}.sb-color-btn:hover{transform:scale(1.15)}.sb-color-btn.active{box-shadow:0 0 0 2px var(--teal);border-color:#fff;transform:scale(1.15)}.sb-width-dot{background:var(--ink);border-radius:50%;min-width:4px;min-height:4px}.sandbox-canvas{cursor:crosshair;background:#fff;width:100%;height:auto;display:block}.sandbox-hint{color:var(--muted);border-top:1px solid var(--border);background:#fafaf9;margin:0;padding:6px 12px 8px;font-size:11px}.sandbox-toggle-label{color:var(--teal);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:8px;padding:6px 0 2px;font-size:13px;font-weight:500;display:flex}.sandbox-toggle-label input[type=checkbox]{width:16px;height:16px;accent-color:var(--teal);cursor:pointer}.rq-canvas-wrap{margin-top:10px}.rq-canvas-label{color:var(--muted);margin:0 0 6px;font-size:12px;font-weight:500}.rq-canvas-img{border:1px solid var(--border);border-radius:8px;width:100%;max-width:600px;display:block}@media (width<=480px){.sandbox-toolbar{gap:4px;padding:6px 8px}.sb-tool-btn{width:30px;height:30px}.sb-color-btn{width:20px;height:20px}.sb-tool-group{gap:2px;padding-right:6px}}html,body{width:100%;overflow-x:hidden}*{box-sizing:border-box;max-width:100%}.portal-root,.portal-content,.subject-section,.lib-card{overflow-x:hidden}.lib-card-title,.lib-card-file{word-break:break-word;overflow-wrap:break-word}.auth-overlay{background:var(--cream);justify-content:center;align-items:center;min-height:100vh;padding:2rem 1rem;display:flex}.auth-card{background:var(--warm-white);border:1px solid var(--border);border-radius:1.5rem;flex-direction:column;gap:.9rem;width:100%;max-width:420px;padding:2.5rem 2rem;display:flex;box-shadow:0 8px 40px #1a1a2e12}.auth-back{color:var(--muted);font-family:var(--font-sans);cursor:pointer;background:0 0;border:none;align-self:flex-start;padding:0;font-size:.85rem;transition:color .2s}.auth-back:hover{color:var(--coral)}.auth-logo{font-family:var(--font-serif);color:var(--teal);letter-spacing:-.02em;font-size:1.5rem;font-weight:700}.auth-card h2{font-family:var(--font-serif);color:var(--ink);margin:0;font-size:1.8rem;line-height:1.2}.auth-card label{font-family:var(--font-sans);color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:-.4rem;font-size:.8rem;font-weight:600}.auth-card input{border:1.5px solid var(--border);width:100%;font-family:var(--font-sans);color:var(--ink);box-sizing:border-box;background:#fff;border-radius:.75rem;outline:none;padding:.75rem 1rem;font-size:.95rem;transition:border-color .2s,box-shadow .2s}.auth-card input:focus{border-color:var(--coral);box-shadow:0 0 0 3px #e8533a1f}.auth-card input::placeholder{color:#bbb}.auth-error{color:var(--coral-dark);font-size:.85rem;font-family:var(--font-sans);background:#fff1ef;border:1px solid #f9c5bb;border-radius:.65rem;padding:.65rem .9rem}.btn-primary.full{justify-content:center;width:100%;margin-top:.3rem}.auth-switch{font-family:var(--font-sans);color:var(--muted);text-align:center;margin:0;font-size:.875rem}.auth-switch button{color:var(--coral);cursor:pointer;font-size:.875rem;font-weight:600;font-family:var(--font-sans);background:0 0;border:none;padding:0;transition:color .2s}.auth-switch button:hover{color:var(--coral-dark)}.portal-shell{background:var(--cream);min-height:100vh;display:flex}.sidebar{background:var(--teal);flex-direction:column;flex-shrink:0;width:220px;min-height:100vh;padding:1.5rem 1rem;display:flex;position:sticky;top:0}.sidebar-logo{font-family:var(--font-serif);color:#fff;letter-spacing:-.02em;padding:.5rem .75rem 1.5rem;font-size:1.3rem;font-weight:700}.sidebar-nav{flex-direction:column;flex:1;gap:.25rem;display:flex}.sidebar-item{color:#ffffffb3;font-family:var(--font-sans);cursor:pointer;text-align:left;background:0 0;border:none;border-radius:.65rem;align-items:center;gap:.6rem;padding:.65rem .75rem;font-size:.88rem;font-weight:500;transition:background .15s,color .15s;display:flex;position:relative}.sidebar-item:hover{color:#fff;background:#ffffff1a}.sidebar-item.active{color:#fff;background:#ffffff2e;font-weight:600}.sidebar-item .badge{background:var(--coral);color:#fff;border-radius:99px;margin-left:auto;padding:.1rem .45rem;font-size:.7rem;font-weight:700}.sidebar-topbar{border-bottom:1px solid #ffffff14;justify-content:space-between;align-items:center;padding:1rem 1.25rem;display:flex}.sidebar-signout{color:#ffffff80;font-family:var(--font-sans);cursor:pointer;background:0 0;border:none;border-radius:.65rem;align-items:center;gap:.6rem;margin-top:auto;padding:.65rem .75rem;font-size:.85rem;transition:color .2s,background .2s;display:flex}.sidebar-signout:hover{color:#fff;background:#ffffff14}.portal-main{flex:1;padding:2rem;overflow-y:auto}.portal-loading{justify-content:center;align-items:center;min-height:60vh;display:flex}.spinner{border:3px solid var(--border);border-top-color:var(--coral);border-radius:50%;width:36px;height:36px;animation:.7s linear infinite spin}.tab-content{max-width:860px}.tab-header{justify-content:space-between;align-items:center;margin-bottom:1.5rem;display:flex}.tab-header h2{font-family:var(--font-serif);color:var(--ink);margin:0;font-size:1.75rem}.limit-warning{color:#7a5c00;background:#fff8e6;border:1px solid #f5d97a;border-radius:.65rem;margin-bottom:1rem;padding:.65rem 1rem;font-size:.85rem}.form-card{margin-bottom:1.5rem}.form-row{flex-wrap:wrap;gap:1rem;margin-bottom:1rem;display:flex}.field{flex-direction:column;flex:1;gap:.4rem;min-width:140px;display:flex}.field.full{flex:100%}.field label{font-family:var(--font-sans);color:var(--muted);text-transform:uppercase;letter-spacing:.06em;font-size:.75rem;font-weight:600}.field input,.field select,.field textarea{border:1.5px solid var(--border);font-family:var(--font-sans);color:var(--ink);background:#fff;border-radius:.65rem;outline:none;padding:.6rem .85rem;font-size:.9rem;transition:border-color .2s,box-shadow .2s}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--coral);box-shadow:0 0 0 3px #e8533a1a}.field textarea{resize:vertical}.pin-row{gap:.4rem;display:flex}.pin-row input{flex:1}.form-actions{justify-content:flex-end;gap:.75rem;margin-top:1rem;display:flex}.list{flex-direction:column;gap:.5rem;display:flex}.list-row{border:1px solid var(--border);background:#fff;border-radius:.85rem;align-items:center;gap:.85rem;padding:.85rem 1rem;transition:box-shadow .15s;display:flex}.list-row:hover{box-shadow:0 2px 10px #0000000f}.avatar{background:var(--teal);color:#fff;width:38px;height:38px;font-family:var(--font-sans);text-transform:uppercase;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:.8rem;font-weight:700;display:flex}.avatar.sm{width:30px;height:30px;font-size:.7rem}.list-info{flex-direction:column;flex:1;gap:.15rem;display:flex}.list-info strong{font-family:var(--font-sans);color:var(--ink);font-size:.9rem}.list-info span{color:var(--muted);font-size:.78rem}.pin-display{font-family:var(--font-sans);color:var(--muted);background:var(--cream);border-radius:.4rem;padding:.25rem .6rem;font-size:.78rem}.icon-btn{cursor:pointer;width:32px;height:32px;color:var(--muted);background:0 0;border:none;border-radius:.5rem;justify-content:center;align-items:center;transition:background .15s,color .15s;display:flex}.icon-btn:hover{background:var(--cream)}.icon-btn.danger:hover{color:var(--coral);background:#fff0ee}.empty-msg{color:var(--muted);padding:2rem 0;font-size:.9rem}.cards-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:1rem;display:grid}.lesson-card{border:1px solid var(--border);background:#fff;border-radius:1rem;flex-direction:column;gap:.5rem;padding:1.25rem;transition:box-shadow .15s,transform .15s;display:flex}.lesson-card:hover{transform:translateY(-2px);box-shadow:0 4px 16px #00000014}.lesson-card-top{justify-content:space-between;align-items:center;display:flex}.subject-badge{font-family:var(--font-sans);color:var(--teal);text-transform:uppercase;letter-spacing:.04em;background:#1b4f6b14;border-radius:99px;padding:.2rem .6rem;font-size:.72rem;font-weight:600}.status-dot{background:var(--border);border-radius:50%;width:8px;height:8px}.status-dot.active{background:#22c55e}.lesson-card h3{font-family:var(--font-serif);color:var(--ink);margin:0;font-size:1rem}.lesson-yt,.lesson-students{color:var(--muted);margin:0;font-size:.78rem}.btn-danger-sm{color:var(--coral);cursor:pointer;font-size:.78rem;font-family:var(--font-sans);background:#fff5f3;border:1px solid #fcd5cc;border-radius:.5rem;align-self:flex-start;margin-top:auto;padding:.35rem .75rem;transition:background .15s}.btn-danger-sm:hover{background:#ffe8e4}.chip-grid{flex-wrap:wrap;gap:.4rem;margin-top:.25rem;display:flex}.chip{border:1.5px solid var(--border);font-size:.78rem;font-family:var(--font-sans);cursor:pointer;color:var(--muted);border-radius:99px;align-items:center;gap:.35rem;padding:.3rem .75rem;transition:all .15s;display:flex}.chip input[type=checkbox]{display:none}.chip.selected{border-color:var(--coral);color:var(--coral);background:#fff0ee;font-weight:600}.questions-section{margin-top:1.25rem}.qs-header{justify-content:space-between;align-items:center;margin-bottom:.75rem;display:flex}.qs-header h4{font-family:var(--font-sans);color:var(--ink);margin:0;font-size:.9rem}.q-card{border:1px solid var(--border);background:var(--cream);border-radius:.75rem;margin-bottom:.75rem;padding:1rem}.q-card-header{flex-wrap:wrap;align-items:center;gap:.5rem;margin-bottom:.75rem;display:flex}.q-card-header span{color:var(--teal);font-size:.85rem;font-weight:700}.q-card-header select,.q-card-header input[type=number]{border:1px solid var(--border);font-size:.8rem;font-family:var(--font-sans);background:#fff;border-radius:.4rem;padding:.3rem .6rem}.q-card textarea{border:1.5px solid var(--border);width:100%;font-family:var(--font-sans);resize:vertical;box-sizing:border-box;border-radius:.6rem;outline:none;padding:.6rem .8rem;font-size:.88rem}.q-card textarea:focus{border-color:var(--coral)}.options-builder{flex-direction:column;gap:.4rem;margin-top:.75rem;display:flex}.opt-row{align-items:center;gap:.5rem;display:flex}.opt-row input[type=radio]{accent-color:var(--coral)}.opt-letter{background:var(--teal);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:22px;height:22px;font-size:.72rem;font-weight:700;display:flex}.opt-row input[type=text]{border:1px solid var(--border);font-size:.85rem;font-family:var(--font-sans);border-radius:.4rem;outline:none;flex:1;padding:.4rem .7rem}.opt-row input[type=text]:focus{border-color:var(--coral)}.hint{color:var(--muted);margin:.25rem 0 0;font-size:.75rem}.review-section-title{font-family:var(--font-sans);color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin:1.5rem 0 .75rem;font-size:.85rem;font-weight:700}.review-card{cursor:default}.review-header{cursor:pointer;align-items:center;gap:.75rem;padding:1rem 1.25rem;display:flex}.review-info{flex-direction:column;flex:1;gap:.15rem;display:flex}.review-info strong{color:var(--ink);font-size:.9rem}.review-info span{color:var(--muted);font-size:.78rem}.badge{color:#7a5c00;white-space:nowrap;background:#fff3cd;border-radius:99px;padding:.2rem .55rem;font-size:.72rem;font-weight:700}.badge.reviewed{color:#065f46;background:#d1fae5}.review-body{border-top:1px solid var(--border);padding:0 1.25rem 1.25rem}.review-date{color:var(--muted);margin:.75rem 0;font-size:.78rem}.review-q{margin-bottom:.75rem}.review-q-header{color:var(--ink);justify-content:space-between;margin-bottom:.35rem;font-size:.85rem;font-weight:600;display:flex}.review-ans{background:var(--cream);border-radius:.5rem;padding:.5rem .75rem;font-size:.85rem}.review-ans.correct{color:#065f46;background:#d1fae5}.review-ans.wrong{color:#991b1b;background:#fee2e2}.review-grade{flex-wrap:wrap;align-items:flex-end;gap:.75rem;margin-top:1rem;display:flex}.plan-display{background:var(--cream);border-radius:.75rem;align-items:center;gap:1rem;padding:.85rem 1rem;display:flex}.plan-name{color:var(--teal);font-weight:700;font-family:var(--font-sans)}.plan-limit{color:var(--muted);font-size:.85rem}.addon-lock{color:var(--muted);background:#f3f4f6;border-radius:.3rem;margin-left:.5rem;padding:.15rem .45rem;font-size:.72rem}.addon-chip.active{color:#065f46;background:#d1fae5;border-radius:99px;margin-right:.4rem;padding:.25rem .65rem;font-size:.78rem;font-weight:600;display:inline-block}.addon-shop{flex-direction:column;gap:.75rem;margin-top:1rem;display:flex}.addon-row{border:1px solid var(--border);background:var(--cream);border-radius:.75rem;justify-content:space-between;align-items:center;gap:1rem;padding:.85rem 1rem;display:flex}.addon-row p{color:var(--muted);margin:.15rem 0 0;font-size:.78rem}.color-row{align-items:center;gap:.5rem;display:flex}.color-row input[type=color]{cursor:pointer;background:0 0;border:none;border-radius:.4rem;width:36px;height:36px}.btn-ghost{border:1px solid var(--border);color:var(--muted);cursor:pointer;background:0 0;border-radius:.4rem;padding:.3rem .6rem;font-size:.85rem;transition:all .15s}.btn-ghost:hover{border-color:var(--coral);color:var(--coral)}.btn-outline.sm,.btn-primary.sm{padding:.3rem .75rem!important;font-size:.78rem!important}.paywall-root{background:var(--cream);flex-direction:column;justify-content:center;align-items:center;min-height:100vh;padding:3rem 1rem;display:flex}.paywall-logo{font-family:var(--font-serif);color:var(--teal);margin-bottom:2.5rem;font-size:1.6rem;font-weight:700}.paywall-card{background:var(--warm-white);border:1px solid var(--border);text-align:center;border-radius:2rem;width:100%;max-width:460px;padding:3rem 2.5rem;box-shadow:0 12px 48px #1a1a2e17}.paywall-card h2{font-family:var(--font-serif);color:var(--ink);margin:0 0 .5rem;font-size:2rem}.paywall-card>p{color:var(--muted);margin:0 0 2rem;font-size:.95rem}.paywall-price{background:var(--cream);border-radius:1.25rem;justify-content:center;align-items:center;gap:.5rem;margin-bottom:1.75rem;padding:1.5rem;display:flex}.paywall-price .amount{font-family:var(--font-serif);color:var(--teal);font-size:3rem;font-weight:700;line-height:1}.paywall-price .period{color:var(--muted);text-align:left;font-size:.9rem;line-height:1.3}.paywall-features{text-align:left;flex-direction:column;gap:.65rem;margin:0 0 2rem;padding:0;list-style:none;display:flex}.paywall-features li{color:var(--ink);align-items:center;gap:.65rem;font-size:.9rem;display:flex}.paywall-features li .check{color:#065f46;background:#d1fae5;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:22px;height:22px;font-size:.65rem;font-weight:700;display:flex}.paywall-cta{background:var(--coral);color:#fff;width:100%;font-family:var(--font-sans);cursor:pointer;border:none;border-radius:.9rem;margin-bottom:1rem;padding:.9rem;font-size:1rem;font-weight:600;transition:background .2s,transform .15s}.paywall-cta:hover{background:var(--coral-dark);transform:translateY(-1px)}.paywall-note{color:var(--muted);font-size:.78rem}.paywall-signout{color:var(--muted);cursor:pointer;font-size:.82rem;font-family:var(--font-sans);background:0 0;border:none;margin-top:1.5rem;transition:color .2s}.paywall-signout:hover{color:var(--coral)}@media (width<=768px){.portal-shell{flex-direction:column}.sidebar{z-index:100;flex-direction:column;gap:0;width:100%;min-height:auto;padding:0;position:sticky;top:0}.sidebar-topbar{background:var(--teal);border-bottom:1px solid #ffffff1a;justify-content:space-between;align-items:center;padding:.6rem 1rem;display:flex}.sidebar-logo{padding:0;font-size:1rem}.sidebar-nav{background:var(--teal);flex-direction:row;justify-content:space-around;gap:0;padding:0 .5rem}.sidebar-item{border-bottom:2px solid #0000;border-radius:0;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:.2rem;padding:.5rem .25rem .4rem;font-size:.6rem}.sidebar-item.active{background:0 0;border-bottom:2px solid #fff}.sidebar-item svg{width:20px;height:20px}.sidebar-label{font-size:.6rem;line-height:1}.sidebar-signout{background:#ffffff1a;border-radius:.4rem;align-items:center;gap:.3rem;padding:.35rem .75rem;font-size:.8rem}.portal-main{padding:1rem}.tab-header h2{font-size:1.3rem}.cards-grid{grid-template-columns:1fr}}.app-loading{background:var(--cream);justify-content:center;align-items:center;min-height:100vh;display:flex}.file-upload-row{flex-wrap:wrap;align-items:center;gap:.6rem;display:flex}.file-upload-btn{border:1.5px dashed var(--border);font-family:var(--font-sans);color:var(--muted);cursor:pointer;text-overflow:ellipsis;white-space:nowrap;border-radius:.65rem;align-items:center;gap:.4rem;max-width:320px;padding:.55rem 1rem;font-size:.85rem;transition:border-color .2s,color .2s;display:inline-flex;overflow:hidden}.file-upload-btn:hover{border-color:var(--coral);color:var(--coral)}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;background:#1a1a2e73;justify-content:center;align-items:center;padding:1rem;display:flex;position:fixed;inset:0}.modal-card{background:var(--warm-white);border-radius:1.5rem;flex-direction:column;width:100%;max-width:560px;max-height:90vh;display:flex;overflow:hidden;box-shadow:0 24px 80px #1a1a2e2e}.modal-large{max-width:720px}.modal-header{border-bottom:1px solid var(--border);flex-shrink:0;justify-content:space-between;align-items:flex-start;padding:1.5rem 1.5rem 1rem;display:flex}.modal-header h3{font-family:var(--font-serif);color:var(--ink);margin:0;font-size:1.3rem}.modal-subtitle{color:var(--muted);margin:.15rem 0 0;font-size:.8rem}.modal-body{flex:1;padding:1.25rem 1.5rem;overflow-y:auto}.modal-footer{border-top:1px solid var(--border);flex-shrink:0;justify-content:flex-end;gap:.75rem;padding:1rem 1.5rem;display:flex}.modal-loading{flex-direction:column;align-items:center;gap:1rem;padding:3rem;display:flex}.spin{animation:.8s linear infinite spin}.ai-progress-text{color:var(--muted);font-size:.9rem}.error-msg{color:var(--coral-dark);background:#fff5f3;border:1px solid #fcd5cc;border-radius:.65rem;align-items:center;gap:.5rem;padding:.65rem .9rem;font-size:.85rem;display:flex}.ai-generated-banner{color:var(--ink);background:#f0fdf4;border:1px solid #bbf7d0;border-radius:.75rem;align-items:center;gap:.75rem;padding:.65rem 1rem;font-size:.85rem;display:flex}.create-practice-meta{flex-direction:column;gap:.75rem;margin-bottom:1.25rem;display:flex}.sp-shell{background:var(--cream);flex-direction:column;min-height:100vh;display:flex}.sp-header{background:var(--teal);align-items:center;gap:1rem;padding:.85rem 1.5rem;display:flex}.brand-logo{font-family:var(--font-serif);color:#fff;font-size:1.2rem;font-weight:700}.brand-logo.sm{font-size:1rem}.sp-student-name{color:#ffffffd9;font-family:var(--font-sans);flex:1;font-size:.9rem;font-weight:500}.btn-ghost.sm{padding:.3rem .75rem;font-size:.78rem}.sp-tabs{background:var(--warm-white);border-bottom:1px solid var(--border);padding:0 1.5rem;display:flex}.sp-tabs button{font-family:var(--font-sans);color:var(--muted);cursor:pointer;background:0 0;border:none;border-bottom:2px solid #0000;margin-bottom:-1px;padding:.85rem 1.25rem;font-size:.88rem;font-weight:500;transition:color .15s,border-color .15s}.sp-tabs button.active{color:var(--coral);border-bottom-color:var(--coral);font-weight:600}.sp-tabs button:hover:not(.active){color:var(--ink)}.sp-list{flex-direction:column;gap:.75rem;width:100%;max-width:760px;margin:0 auto;padding:1.5rem;display:flex}.sp-card{background:var(--warm-white);border:1px solid var(--border);border-radius:1rem;justify-content:space-between;align-items:center;gap:1rem;padding:1.1rem 1.25rem;transition:box-shadow .15s;display:flex}.sp-card:hover{box-shadow:0 4px 16px #0000000f}.sp-card-info{flex-direction:column;flex:1;gap:.3rem;display:flex}.sp-card-info h3{font-family:var(--font-serif);color:var(--ink);margin:0;font-size:1.05rem}.subject-badge.sm{font-size:.65rem}.sp-due{color:var(--muted);font-size:.75rem}.sp-submitted{color:#16a34a;white-space:nowrap;background:#f0fdf4;border-radius:99px;padding:.3rem .75rem;font-size:.82rem;font-weight:600}.sp-practice{background:var(--cream);min-height:100vh}.sp-nav{background:var(--warm-white);border-bottom:1px solid var(--border);align-items:center;gap:1rem;padding:.85rem 1.5rem;display:flex}.sp-content{max-width:700px;margin:0 auto;padding:2rem 1.5rem}.sp-content h1{font-family:var(--font-serif);color:var(--ink);margin:0 0 .5rem;font-size:1.75rem}.sp-desc{color:var(--muted);margin:0 0 2rem;font-size:.92rem}.sp-question{background:var(--warm-white);border:1px solid var(--border);border-radius:1rem;margin-bottom:1rem;padding:1.25rem}.sp-q-header{color:var(--muted);text-transform:uppercase;letter-spacing:.06em;justify-content:space-between;margin-bottom:.75rem;font-size:.78rem;font-weight:600;display:flex}.sp-q-text{color:var(--ink);margin:0 0 1rem;font-size:.95rem;line-height:1.55}.sp-options{flex-direction:column;gap:.5rem;display:flex}.sp-option{border:1.5px solid var(--border);cursor:pointer;color:var(--ink);border-radius:.75rem;align-items:center;gap:.75rem;padding:.7rem 1rem;font-size:.9rem;transition:all .15s;display:flex}.sp-option input[type=radio]{display:none}.sp-option:hover{border-color:var(--coral);background:#fff8f6}.sp-option.selected{border-color:var(--coral);color:var(--coral);background:#fff0ee;font-weight:600}.sp-textarea{border:1.5px solid var(--border);width:100%;font-family:var(--font-sans);resize:vertical;box-sizing:border-box;border-radius:.75rem;outline:none;padding:.75rem 1rem;font-size:.9rem;transition:border-color .2s}.sp-textarea:focus{border-color:var(--coral);box-shadow:0 0 0 3px #e8533a1a}.sp-done{text-align:center;font-family:var(--font-serif);color:#16a34a;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:1rem;padding:3rem;font-size:1.5rem}@media (width<=600px){.sp-card{flex-direction:column;align-items:flex-start}.sp-content{padding:1.25rem 1rem}}@media (width<=768px){.auth-card{margin:1rem;padding:2rem 1.25rem}.auth-card h2{font-size:1.5rem}.paywall-card{padding:2rem 1.25rem}.paywall-card h2{font-size:1.6rem}.paywall-price .amount{font-size:2.4rem}.portal-main{padding:1rem}.tab-header{flex-direction:column;align-items:flex-start;gap:.75rem}.tab-header>div{width:100%}.tab-header>div button,.tab-header>div label,.tab-header>button{justify-content:center;width:100%}.form-row{flex-direction:column}.field{min-width:unset;width:100%}.form-actions{flex-direction:column}.form-actions button{width:100%}.form-card{padding:1.25rem 1rem}.list-row{flex-wrap:wrap;gap:.5rem}.list-row .pin-display{font-size:.72rem}.review-header{flex-wrap:wrap;gap:.5rem}.review-grade{flex-direction:column}.review-grade .field{width:100%}.modal-overlay{align-items:flex-end;padding:.5rem}.modal-card{border-radius:1.25rem 1.25rem 0 0;max-height:95vh}.modal-large{max-width:100%}.modal-header{padding:1.25rem 1rem .75rem}.modal-body{padding:1rem}.modal-footer{flex-direction:column;padding:.75rem 1rem}.modal-footer button{width:100%}.q-card-header{flex-wrap:wrap;gap:.4rem}.options-builder{gap:.5rem}.addon-row{flex-direction:column;align-items:flex-start;gap:.5rem}.addon-row a{text-align:center;width:100%}.plan-display{flex-direction:column;gap:.25rem}.sp-tabs{overflow-x:auto}.sp-list{padding:1rem}.sp-card{flex-direction:column;align-items:flex-start;gap:.75rem}.sp-card button,.sp-card a{text-align:center;justify-content:center;width:100%}.sp-content{padding:1rem}.sp-q-header{font-size:.72rem}.sp-nav{flex-wrap:wrap;gap:.5rem}}@media (width<=480px){.hero h1{font-size:clamp(1.8rem,8vw,2.5rem)}.feat-grid,.about-stats{grid-template-columns:1fr}.sidebar-item span:not(.badge),.sidebar-signout span{display:none}.sidebar-item{padding:.5rem .6rem}.sp-header{flex-wrap:wrap;gap:.4rem}.sp-submitted{font-size:.72rem}input,select,textarea{font-size:16px!important}}.admin-root{background:var(--cream,#fdf8f3);min-height:100vh}.admin-header{background:var(--teal,#1b4f6b);justify-content:space-between;align-items:center;padding:1rem 2rem;display:flex}.admin-header-left{align-items:center;gap:.75rem;display:flex}.admin-logo{font-size:1.5rem}.admin-header h1{color:#fff;margin:0;font-size:1.1rem;font-weight:700}.admin-header span{color:#fff9;font-size:.78rem}.admin-body{max-width:1080px;margin:0 auto;padding:2rem}.admin-stats{flex-wrap:wrap;gap:1rem;margin-bottom:2rem;display:flex}.admin-stat{border:1px solid var(--border,#e5e0d8);background:#fff;border-radius:1rem;flex:1;min-width:130px;padding:1rem 1.5rem}.admin-stat-n{color:var(--teal,#1b4f6b);font-size:1.8rem;font-weight:700}.admin-stat-l{color:#6b7280;margin-top:.15rem;font-size:.75rem}.admin-section-title{margin-bottom:1rem;font-size:1rem;font-weight:700}.admin-table-wrap{overflow-x:auto}.admin-table{border-collapse:collapse;border:1px solid var(--border,#e5e0d8);background:#fff;border-radius:1rem;width:100%;overflow:hidden}.admin-table th{background:var(--teal,#1b4f6b);color:#fff;text-align:left;text-transform:uppercase;letter-spacing:.06em;padding:.7rem 1rem;font-size:.72rem;font-weight:600}.admin-table td{border-bottom:1px solid var(--border,#e5e0d8);vertical-align:middle;padding:.8rem 1rem;font-size:.85rem}.admin-table tr:last-child td{border-bottom:none}.admin-table tr:hover td{background:#faf9f7}.admin-table strong{font-size:.88rem;display:block}.admin-muted{color:#6b7280;font-size:.76rem}.admin-count{color:#6b7280;font-size:.82rem}.admin-plan-sel{border:1.5px solid var(--border,#e5e0d8);cursor:pointer;background:#fff;border-radius:.5rem;padding:.3rem .6rem;font-size:.82rem}.admin-plan-sel:focus{border-color:var(--coral,#e8533a);outline:none}.admin-addons{flex-wrap:wrap;gap:.3rem;display:flex}.admin-addon-btn{cursor:pointer;white-space:nowrap;border:1.5px solid;border-radius:99px;padding:.22rem .55rem;font-size:.7rem;font-weight:600;transition:all .15s}.addon-on{color:#5b21b6;background:#ede9fe;border-color:#c4b5fd}.addon-on:hover{color:#991b1b;background:#fee2e2;border-color:#fca5a5}.addon-off{color:#6b7280;background:#f3f4f6;border-color:#e5e0d8}.addon-off:hover{color:#5b21b6;background:#ede9fe;border-color:#c4b5fd}.admin-saving{color:#6b7280;font-size:.72rem;font-style:italic}.admin-saved{color:#16a34a;font-size:.72rem;font-weight:600}.admin-error{color:var(--coral,#e8533a);font-size:.72rem}.admin-alert{color:#92400e;background:#fef3c7;border:1px solid #fcd34d;border-radius:.75rem;margin-bottom:1.5rem;padding:.75rem 1rem;font-size:.85rem}.admin-access-btn{cursor:pointer;white-space:nowrap;border:1.5px solid;border-radius:99px;padding:.3rem .75rem;font-size:.78rem;font-weight:700;transition:all .15s}.access-open{color:#065f46;background:#d1fae5;border-color:#6ee7b7}.access-open:hover,.access-closed{color:#991b1b;background:#fee2e2;border-color:#fca5a5}.access-closed:hover{color:#065f46;background:#d1fae5;border-color:#6ee7b7}.admin-renewal{flex-direction:column;gap:.15rem;display:flex}.renewal-date{color:var(--ink,#1a1a2e);font-size:.8rem;font-weight:600}.renewal-ok{color:#16a34a;font-size:.72rem}.renewal-grace{color:#d97706;font-size:.72rem;font-weight:600}.renewal-overdue{color:var(--coral,#e8533a);font-size:.75rem;font-weight:700}@media (width<=640px){.admin-header{padding:.75rem 1rem}.admin-body{padding:1rem}.admin-stats{gap:.5rem}.admin-stat{min-width:100px;padding:.75rem 1rem}.admin-stat-n{font-size:1.4rem}}