:root {
    --bg-color: #f1f5f9; --text-main: #0f172a; --text-muted: #64748b;
    --brand-dark: #1e293b; --brand-red: #dc2626; --surface: #ffffff;
    --success: #16a34a; --warning: #eab308;
    --ui-border: 4px solid var(--brand-dark); --btn-border: 3px solid var(--brand-dark);
    --ui-shadow: 12px 12px 0 var(--brand-red); --btn-shadow: 4px 4px 0 var(--brand-dark);
    --card-shadow: 8px 8px 0 var(--brand-dark); --card-hover-shadow: 12px 12px 0 var(--brand-red);
    --ui-radius: 0px; --btn-radius: 0px;
    --font-main: 'Montserrat', sans-serif; --font-head: 'Playfair Display', serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: var(--font-main); transition: background-color 0.3s, color 0.3s, border-color 0.3s, box-shadow 0.3s; }
body { background-color: var(--bg-color); color: var(--text-main); overflow-x: hidden; }
.container-fluid { width: 100%; max-width: 1920px; padding: 0 40px; margin: 0 auto; }

.navbar { background: var(--brand-dark); color: white; padding: 15px 0; border-bottom: 4px solid var(--brand-red); box-shadow: 0 6px 15px rgba(0,0,0,0.2); position: sticky; top: 0; z-index: 1000; }
.nav-content { display: flex; justify-content: space-between; align-items: center; position: relative; }
.logo-text { font-family: var(--font-head); font-size: 24pt; font-weight: 700; color: white; text-decoration: none; }
.logo-text span { color: var(--brand-red); }
.nav-links { display: flex; gap: 15px; align-items: center; }
.btn-nav { background: var(--surface); color: var(--text-main); border: var(--btn-border); padding: 10px 18px; font-weight: 800; cursor: pointer; transition: all 0.2s; text-transform: uppercase; font-size: 9pt; letter-spacing: 1px; text-decoration: none; box-shadow: var(--btn-shadow); border-radius: var(--btn-radius); }
.btn-nav:hover { transform: translate(-3px, -3px); box-shadow: 6px 6px 0 var(--brand-red); border-color: var(--brand-red); }
.btn-nav.active { background: var(--brand-red); color: var(--surface); border-color: var(--surface); transform: translate(-3px, -3px); box-shadow: 6px 6px 0 var(--surface); }

.mobile-menu-btn { display: none; background: transparent; border: none; cursor: pointer; flex-direction: column; gap: 6px; padding: 5px; }
.mobile-menu-btn span { display: block; width: 30px; height: 4px; background: white; border: 1px solid var(--brand-dark); transition: 0.3s; }

main.main-content { padding-top: 50px; padding-bottom: 80px; min-height: calc(100vh - 100px); }

.page-title-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 40px; border-bottom: 5px solid var(--brand-red); padding-bottom: 10px; flex-wrap: wrap; gap: 15px; }
.page-header { font-family: var(--font-head); font-size: 32pt; color: var(--text-main); border: none; margin: 0; padding: 0; }

.brutal-box { background: var(--surface); border: var(--ui-border); box-shadow: var(--ui-shadow); padding: 30px; margin-bottom: 30px; width: 100%; display: flex; flex-direction: column; border-radius: var(--ui-radius); color: var(--text-main); }

.brutal-btn { background: var(--surface); color: var(--text-main); border: var(--btn-border); padding: 12px 20px; font-weight: 800; cursor: pointer; transition: all 0.2s; box-shadow: var(--btn-shadow); text-transform: uppercase; border-radius: var(--btn-radius); text-decoration: none; font-size: 10pt; letter-spacing: 1px; text-align: center; }
.brutal-btn:hover { 
    transform: translate(-3px, -3px) !important; 
    box-shadow: 6px 6px 0 var(--brand-dark) !important; 
    border-color: var(--brand-dark) !important; 
    color: currentColor !important; 
    opacity: 1 !important; 
}
.form-group { margin-bottom: 15px; }
.form-group label { display: block; font-weight: 800; margin-bottom: 8px; font-size: 10pt; text-transform: uppercase; color: var(--text-main); }
.form-input { width: 100%; padding: 14px; border: var(--btn-border); font-weight: 600; outline: none; background: var(--bg-color); color: var(--text-main); font-family: inherit; transition: 0.3s; border-radius: var(--btn-radius); }
.form-input:focus { border-color: var(--brand-red); }

.brutal-table-hover { width: 100%; border-collapse: separate; border-spacing: 0 10px; border: none; background: transparent; margin-top: 10px; }
.brutal-table-hover th { background: var(--brand-dark); color: white; padding: 15px; border: 2px solid var(--brand-dark); text-transform: uppercase; font-weight: 800; text-align: left; }
.brutal-table-hover td { background: var(--surface); padding: 15px; border-top: 2px solid var(--brand-dark); border-bottom: 2px solid var(--brand-dark); color: var(--text-main); font-weight: 600; transition: border-color 0.2s; }
.brutal-table-hover td:first-child { border-left: 2px solid var(--brand-dark); }
.brutal-table-hover td:last-child { border-right: 2px solid var(--brand-dark); }
.brutal-table-hover tbody tr { transition: all 0.2s ease; cursor: pointer; }
.brutal-table-hover tbody tr:hover { background: rgba(220, 38, 38, 0.04); }
.brutal-table-hover tbody tr:hover td { border-color: var(--brand-red); }

.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.8); backdrop-filter: blur(5px); display: none; justify-content: center; align-items: center; z-index: 2000; padding: 20px; }
.modal-box { background: var(--surface); color: var(--text-main); width: 100%; max-width: 800px; max-height: 90vh; overflow-y: auto; border: var(--ui-border); box-shadow: var(--ui-shadow); padding: 40px; position: relative; border-radius: var(--ui-radius); }
.btn-close-modal { position: absolute; top: 15px; right: 15px; background: var(--brand-dark); color: var(--surface); border: var(--btn-border); width: 45px; height: 45px; font-weight: 800; font-size: 20px; cursor: pointer; display: flex; justify-content: center; align-items: center; border-radius: var(--btn-radius); z-index: 10; transition: 0.2s; }
.btn-close-modal:hover { transform: translate(-2px, -2px); box-shadow: 4px 4px 0 var(--brand-red); border-color: var(--brand-red); color: var(--brand-red); background: var(--surface); }

.split-layout { display: flex; gap: 40px; align-items: stretch; }
.split-left { flex: 1; min-width: 350px; position: sticky; top: 120px; align-self: flex-start; }
.split-right { flex: 2; display: flex; flex-direction: column; gap: 20px; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; margin-bottom: 40px; }
.stat-card { background: var(--surface); border: var(--ui-border); padding: 30px 20px; box-shadow: var(--card-shadow); text-align: center; border-radius: var(--ui-radius); }
.stat-num { font-size: 3.5rem; font-weight: 900; color: var(--brand-red); margin-bottom: 10px; font-family: var(--font-head); }

.def-cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
.def-card { background: var(--surface); border: var(--ui-border); box-shadow: var(--card-shadow); padding: 40px 20px; text-align: center; cursor: pointer; transition: 0.3s; border-radius: var(--ui-radius); }
.def-card:hover { transform: translateY(-5px); box-shadow: var(--card-hover-shadow); border-color: var(--brand-red); }
.def-card h2 { font-family: var(--font-head); font-size: 20pt; color: var(--text-main); margin-bottom: 15px; }
.def-icon { font-size: 40pt; margin-bottom: 15px; }

.task-grid { display: flex; flex-direction: column; gap: 20px; width: 100%; }
.task-card { background: var(--surface); border: var(--ui-border); padding: 25px; box-shadow: var(--card-shadow); margin-bottom: 5px; transition: all 0.2s; border-radius: var(--ui-radius); color: var(--text-main); }
.task-card:hover { transform: translate(-4px, -4px); box-shadow: var(--card-hover-shadow); border-color: var(--brand-red); }
.task-header { display: flex; justify-content: space-between; align-items: center; border-bottom: 2px solid var(--brand-dark); padding-bottom: 15px; margin-bottom: 20px; }
.task-title { font-size: 15pt; font-weight: 900; text-transform: uppercase; }
.badge { padding: 6px 14px; font-weight: 900; font-size: 10pt; border: var(--btn-border); text-transform: uppercase; border-radius: var(--btn-radius); display: inline-block; transition: 0.2s; }
.status-pending { background: var(--surface); color: var(--text-main); } 
.status-processing { background: var(--warning); color: #000; } 
.status-completed { background: var(--success); color: white; } 
.status-failed { background: var(--brand-red); color: white; }
.progress-wrapper { background: var(--surface); height: 30px; border: var(--btn-border); position: relative; margin-top: 15px; border-radius: var(--btn-radius); overflow: hidden; }
.progress-bar { height: 100%; background: var(--brand-dark); width: 0%; transition: width 0.5s ease; }
.progress-text { position: absolute; top: 0; left: 0; width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; font-weight: 900; font-size: 11pt; color: var(--surface); mix-blend-mode: difference; }

.tab-wrapper { display: flex; gap: 10px; margin-bottom: 25px; border-bottom: 4px solid var(--brand-dark); padding-bottom: 10px; flex-wrap: wrap; }
.tab-btn { background: var(--surface); border: var(--btn-border); padding: 10px 20px; font-weight: 900; cursor: pointer; text-transform: uppercase; font-size: 10pt; color: var(--text-main); transition: 0.3s; border-radius: var(--btn-radius); }
.tab-btn:hover { transform: translate(-3px, -3px); box-shadow: 6px 6px 0 var(--brand-red); border-color: var(--brand-red); color: var(--brand-red); }
.tab-btn.active { background: var(--brand-dark); color: white; transform: translateY(-3px); box-shadow: var(--btn-shadow); }

.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 40px; }
.card-cover-box { position: relative; height: 350px; background: var(--surface); border: var(--ui-border); box-shadow: var(--card-shadow); transition: 0.3s; padding: 40px 20px 20px 20px; display: flex; flex-direction: column; cursor: pointer; border-radius: var(--ui-radius); color: var(--text-main); }
.card-cover-box:hover { border-color: var(--brand-red); box-shadow: var(--card-hover-shadow); transform: translateY(-5px); }
.q-text-preview { font-size: 10.5pt; line-height: 1.6; font-weight: 600; flex: 1; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 8; -webkit-box-orient: vertical; }
.card-type-wrapper { position: absolute; top: 15px; left: -15px; z-index: 30; }
.type-badge { border: var(--btn-border); padding: 4px 12px; font-weight: 800; font-size: 10pt; background: var(--brand-red); color: var(--surface); border-radius: var(--btn-radius); }
.loader-text { text-align: center; padding: 30px; font-weight: 900; color: var(--brand-red); text-transform: uppercase; letter-spacing: 2px; }

.book-cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 30px; padding-bottom: 60px; }
.book-card { position: relative; transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275); }

.book-type-wrapper { position: absolute; top: 15px; left: -10px; z-index: 30; transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55); }
.book-card:hover .book-type-wrapper { transform: translate(-15px, -15px); }
.book-type-badge { border: 2px solid var(--brand-dark); background: var(--brand-red); color: white; padding: 4px 12px; font-weight: bold; font-size: 10pt; box-shadow: 4px 4px 0 rgba(0,0,0,0.2); text-transform: uppercase; white-space: nowrap; }
.book-watermark-badge { border: 2px solid var(--brand-dark); background: #f59e0b; color: #000; padding: 2px 12px; font-weight: bold; font-size: 8pt; box-shadow: 3px 3px 0 rgba(0,0,0,0.2); margin-top: 5px; display: inline-block; text-transform: uppercase; white-space: nowrap; }

.book-code-wrapper { position: absolute; bottom: 15px; right: -10px; z-index: 30; transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55); }
.book-card:hover .book-code-wrapper { transform: translate(15px, 15px); }
.book-test-no { border: 2px solid var(--brand-dark); color: var(--brand-dark); padding: 4px 12px; font-weight: bold; font-size: 12pt; background: #fff; box-shadow: 4px 4px 0 rgba(0,0,0,0.2); white-space: nowrap; }

.book-cover-box { position: relative; aspect-ratio: 3/4; background: #cbd5e1; overflow: hidden; border: 2px solid var(--brand-dark); box-shadow: 6px 6px 15px rgba(0,0,0,0.25); transition: all 0.4s ease; border-radius: var(--ui-radius); }
.book-card:hover .book-cover-box { border-color: var(--brand-red); box-shadow: 12px 12px 25px rgba(0,0,0,0.3); }
.book-cover-box img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }

.book-card-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(30, 41, 59, 0.9); color: white; display: flex; flex-direction: column; justify-content: center; align-items: center; padding: 20px; text-align: center; opacity: 0; transition: all 0.3s ease; backdrop-filter: blur(2px); z-index: 20; }
.book-card:hover .book-card-overlay { opacity: 1; }
.book-card:hover .book-cover-box img { transform: scale(1.1); }

.book-overlay-title { font-size: 14pt; font-weight: 800; margin-bottom: 5px; transform: translateY(20px); transition: 0.4s ease 0.1s; line-height: 1.2; }
.book-overlay-desc { font-size: 9.5pt; line-height: 1.5; color: #cbd5e1; transform: translateY(20px); transition: 0.4s ease 0.2s; margin-bottom: 20px; }
.book-card:hover .book-overlay-title, .book-card:hover .book-overlay-desc, .book-card:hover .brutal-btn-card { transform: translateY(0); }

.brutal-btn-card { background: var(--surface); color: var(--text-main); border: 3px solid var(--brand-dark); padding: 8px 15px; font-weight: 900; cursor: pointer; text-transform: uppercase; font-size: 9pt; width: 90%; transition: 0.2s; text-decoration: none; display: block; text-align: center; box-shadow: 4px 4px 0 var(--brand-dark); margin-bottom: 10px; transform: translateY(20px); }
.brutal-btn-card:hover { transform: translate(-3px, -3px) !important; box-shadow: 7px 7px 0 var(--brand-red); border-color: var(--brand-red); color: var(--brand-red); }

.builder-layout { display: flex; gap: 30px; align-items: stretch; height: calc(100vh - 250px); position: relative; }
.builder-left { flex: 1; display: flex; flex-direction: column; border: var(--ui-border); background: var(--surface); border-radius: var(--ui-radius); overflow: hidden; min-width: 350px;}
.builder-right { flex: 1.8; border: var(--ui-border); background: #cbd5e1; padding: 30px; overflow-y: auto; box-shadow: inset 0 0 20px rgba(0,0,0,0.1); border-radius: var(--ui-radius); }

#builderLockOverlay { position: absolute; top:0; left:0; width:100%; height:100%; background:rgba(30,41,59,0.85); backdrop-filter:blur(5px); z-index:100; display:flex; justify-content:center; align-items:center; flex-direction:column; color:white; font-family:var(--font-head); }

.source-list { flex: 1; overflow-y: auto; padding: 15px; background: var(--bg-color); list-style: none; display: flex; flex-direction: column; gap: 10px; }
.src-card { background: white; border: 2px solid var(--brand-dark); padding: 15px; font-size: 10pt; font-weight: 600; box-shadow: 3px 3px 0 var(--brand-dark); color: black; display: flex; gap: 10px; cursor: pointer; transition: 0.2s; }
.src-card:hover { transform: translate(-2px, -2px); box-shadow: 5px 5px 0 var(--brand-red); border-color: var(--brand-red); }
.src-card.added { opacity: 0.4; pointer-events: none; filter: grayscale(100%); }

#livePreviewContainer { display: flex; flex-direction: column; gap: 40px; align-items: center; padding-bottom: 50mm;}
.a4-page { width: 210mm; min-height: 297mm; height: max-content; background: white; box-shadow: 0 15px 40px rgba(0,0,0,0.25); position: relative; padding: 12mm 12mm 20mm 12mm; color: #0f172a; overflow: hidden; font-family: 'Montserrat', sans-serif;}
.a4-page .watermark { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%) rotate(-45deg); font-size: 90px; color: rgba(0,0,0,0.06); font-weight: 900; white-space: nowrap; pointer-events: none; z-index: 0; text-transform: none !important; }

.a4-page .page-content { position: relative; z-index: 1; display: flex; flex-direction: column; height: 100%; }
.a4-page .header { display: flex; justify-content: space-between; align-items: stretch; border-bottom: 3px solid #1e293b; padding-bottom: 8px; margin-bottom: 12px; }
.a4-page .test-title { font-size: 13pt; font-weight: 800; color: #334155; }
.a4-page .test-no { border: 2px solid #1e293b; color: #1e293b; padding: 3px 10px; font-weight: bold; font-size: 12pt; border-radius: 4px; display: inline-block; background: #fff; }
.a4-page .separator { width: 1px; background: #e2e8f0; position: absolute; left: 50%; top: 50px; bottom: 0; transform: translateX(-50%); z-index: 0; }
.a4-page .columns-wrapper { display: flex; justify-content: space-between; flex: 1; gap: 12mm; position: relative; z-index: 2; }
.a4-page .column { width: 48%; display: flex; flex-direction: column; gap: 20px; min-height: 100px; }

.live-question { 
    display: flex; flex-direction: column; 
    font-size: 8pt; 
    position: relative; cursor: grab; background: transparent; border: 1px dashed transparent; transition: 0.2s; 
}
.live-question:hover { border-color: var(--brand-red); background: rgba(248, 250, 252, 0.85); }
.live-question:active { cursor: grabbing; }
.live-question .q-top { display: flex; align-items: flex-start; margin-bottom: 4px; }
.live-question .q-num { 
    background: #1e293b; color: white; font-weight: 700; 
    width: 18px; height: 18px; 
    display: flex; align-items: center; justify-content: center; border-radius: 4px; margin-right: 6px; flex-shrink: 0; 
    font-size: 8pt; 
}

.live-question .q-text { font-weight: 600; line-height: 1.35; flex: 1; word-break: break-word; }

.live-question .qr-placeholder { 
    display: block; 
    width: 62px; height: 62px; 
    position: relative; margin-left: 8px; flex-shrink: 0; text-decoration: none; cursor: pointer; transition: transform 0.2s ease; 
}
.live-question .qr-placeholder:hover { transform: scale(1.15); z-index: 10; }
.live-question .qr-placeholder canvas, .live-question .qr-placeholder img { width: 100% !important; height: 100% !important; border: 1px solid #cbd5e1; border-radius: 6px; padding: 2px; background: #fff; display: block; box-shadow: 0 3px 8px rgba(0,0,0,0.08); }
.live-question .qr-icon { position: absolute; right: -6px; bottom: -6px; background: var(--brand-red); color: white; border-radius: 50%; width: 22px; height: 22px; display: flex; align-items: center; justify-content: center; border: 2px solid white; box-shadow: 0 3px 6px rgba(220, 38, 38, 0.35); transition: background 0.2s ease; z-index: 10; }
.live-question .qr-icon svg { width: 11px; height: 11px; }
.live-question .qr-placeholder:hover .qr-icon { background: var(--brand-dark); }

.live-question .options { display: flex; flex-wrap: wrap; margin-top: 4px; padding-left: 26px; }
.live-question .opt { width: 48%; font-size: 8pt; margin-bottom: 4px; display: flex; align-items: flex-start; padding: 2px 4px; }
.live-question .opt-letter { font-weight: 800; color: #dc2626; margin-right: 5px; width: 14px; }

.live-question .remove-btn { position: absolute; top: -10px; left: -10px; background: #dc2626; color: white; border: none; font-weight: bold; cursor: pointer; width:24px; height:24px; border-radius: 50%; z-index: 10; display: none; align-items:center; justify-content:center;}
.live-question:hover .remove-btn { display: flex; }
.live-question.sortable-ghost { opacity: 0.3; background: #cbd5e1; }

.a4-page .page-footer { position: absolute; bottom: 6mm; left: 0; width: 100%; text-align: center; font-weight: 700; font-size: 9pt; color: #1e293b; z-index: 2; }

.math-preview-box { background: #f8fafc; border: 2px dashed #94a3b8; padding: 15px; margin-top: 10px; min-height: 100px; font-size: 11pt; font-weight: 600; line-height: 1.6; }

.latex-toolbar { display:flex; flex-wrap:wrap; gap:5px; background:var(--brand-dark); padding:10px; border:var(--btn-border); border-bottom:none; border-radius:var(--btn-radius) var(--btn-radius) 0 0; }
.latex-btn { background:var(--surface); color:var(--text-main); border:2px solid var(--text-main); padding:6px 12px; font-weight:800; font-size:11pt; cursor:pointer; }
.latex-btn:hover { background:var(--brand-red); color:white; border-color:var(--brand-red); }

.sol-step-card { border:var(--btn-border); background:var(--bg-color); padding:15px; margin-bottom:15px; position:relative; }
.sol-step-remove { position:absolute; top:-10px; right:-10px; background:var(--brand-red); color:white; border:none; width:25px; height:25px; font-weight:bold; cursor:pointer; display:flex; align-items:center; justify-content:center; }

@media (max-width: 992px) {
    .container-fluid { padding: 0 20px; }
    .mobile-menu-btn { display: flex; }
    .nav-links { display: none; width: 100%; position: absolute; top: 100%; left: 0; background: var(--brand-dark); padding: 30px 20px; flex-direction: column; gap: 20px; border-bottom: 5px solid var(--brand-red); }
    .nav-links.show { display: flex; }
    .split-layout { flex-direction: column; gap: 30px; }
    .split-left { position: static; width: 100%; }
    .def-cards-grid { grid-template-columns: 1fr 1fr; }
    .builder-layout { flex-direction: column; height: auto; }
    .a4-page { width: 100%; min-height: auto; padding: 15px; }
    .a4-page .separator { display: none; }
    .a4-page .columns-wrapper { flex-direction: column; gap: 20px; }
    .a4-page .column { width: 100%; }
    .live-question .opt { width: 100%; }
}

@media (max-width: 768px) {
    main.main-content { padding-top: 15px; padding-bottom: 30px; }
    .page-header { font-size: 16pt; margin-bottom: 10px; }
    .page-title-row { margin-bottom: 20px; gap: 10px; }
    .logo-text { font-size: 14pt; }
    .brutal-box { padding: 15px; margin-bottom: 15px; border-width: 2px; }
    .def-card { padding: 15px 10px; border-width: 2px; }
    .def-card h2 { font-size: 12pt; margin-bottom: 5px; }
    .def-icon { font-size: 20pt; margin-bottom: 5px; }
    .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 20px; }
    .stat-card { padding: 10px 5px; border-width: 2px; }
    .stat-num { font-size: 1.8rem; margin-bottom: 5px; }
    .stat-title { font-size: 8pt; }
    .brutal-btn, .tab-btn { padding: 8px 10px; font-size: 7.5pt; border-width: 2px; }
    .form-input { padding: 8px; font-size: 8.5pt; border-width: 2px; margin-bottom: 5px; }
    .form-group label { font-size: 7.5pt; margin-bottom: 4px; }
    .def-cards-grid { grid-template-columns: 1fr 1fr; gap: 10px; } 
    .cards-grid { grid-template-columns: 1fr; gap: 15px; }
    .book-cards-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; padding-bottom: 30px; }
    .card-cover-box { height: auto; min-height: 160px; padding: 25px 10px 10px 10px; border-width: 2px; }
    .q-text-preview { font-size: 8.5pt; -webkit-line-clamp: 4; }
    .type-badge { font-size: 8pt; padding: 3px 8px; border-width: 2px; }
    .modal-box { padding: 15px; border-width: 2px; }
    .modal-box h2 { font-size: 12pt !important; margin-bottom: 10px !important; padding-bottom: 5px !important; }
    .btn-close-modal { width: 30px; height: 30px; font-size: 16px; top: 10px; right: 10px; border-width: 2px; }
    .brutal-table-hover { border-spacing: 0 5px; }
    .brutal-table-hover th, .brutal-table-hover td { padding: 8px 5px; font-size: 7.5pt; border-width: 1px; }
    .book-type-badge { font-size: 7pt; padding: 3px 8px; border-width: 1px; }
    .book-watermark-badge { font-size: 6pt; padding: 2px 6px; }
    .book-test-no { font-size: 9pt; padding: 3px 8px; border-width: 1px; }
    .book-overlay-title { font-size: 10pt; }
    .book-overlay-desc { font-size: 7.5pt; margin-bottom: 10px; }
    .brutal-btn-card { font-size: 7pt; padding: 5px 8px; border-width: 2px; }
    .task-card { padding: 12px; border-width: 2px; }
    .task-title { font-size: 10pt; }
    .badge { padding: 3px 8px; font-size: 7pt; border-width: 2px; }
    .progress-wrapper { height: 18px; margin-top: 10px; }
    .progress-text { font-size: 7.5pt; }
    .src-card { padding: 10px; font-size: 8pt; border-width: 2px; }
    .math-preview-box { padding: 10px; font-size: 9pt; min-height: 60px; }
    .latex-btn { padding: 4px 8px; font-size: 9pt; }
}

.dynamic-cover {
    container-type: inline-size;
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
    background-color: #fff;
}
.dynamic-cover .bg-layer, .dynamic-cover .overlay, .dynamic-cover .shape, .dynamic-cover .content {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
}
.dynamic-cover .bg-layer { background-size: cover; background-position: center; z-index: 1; }
.dynamic-cover .overlay { z-index: 2; }
.dynamic-cover .content { 
    z-index: 4; padding: 8cqw; display: flex; flex-direction: column; 
    justify-content: center; align-items: center; text-align: center; 
}
.dynamic-cover .t-grd { font-size: 5.5cqw; font-weight: 700; letter-spacing: 0.3cqw; margin-bottom: 4cqw; text-transform: uppercase; }
.dynamic-cover .t-tit { font-size: 16cqw; font-weight: 900; line-height: 1.1; margin-bottom: 3.5cqw; letter-spacing: -0.5cqw; text-transform: uppercase; }
.dynamic-cover .t-sub { font-size: 7.5cqw; font-weight: 700; letter-spacing: 0.2cqw; text-transform: uppercase; }
.dynamic-cover .t-aut { font-size: 3.5cqw; font-weight: 700; letter-spacing: 0.3cqw; position: absolute; text-transform: uppercase; bottom: 8cqw; left: 0; width: 100%; text-align: center; z-index: 10; }

.dynamic-cover.p-drk .overlay { background: rgba(15, 23, 42, 0.85); }
.dynamic-cover.p-drk .content { color: #ffffff; }
.dynamic-cover.p-drk .t-grd { color: #ef4444; }
.dynamic-cover.p-drk .t-sub { color: #94a3b8; }

.dynamic-cover.p-blu .overlay { background: linear-gradient(to top, #020617 0%, rgba(37,99,235,0.7) 100%); }
.dynamic-cover.p-blu .content { color: #ffffff; }
.dynamic-cover.p-blu .t-grd { color: #38bdf8; }

.dynamic-cover.p-red .overlay { background: rgba(239, 68, 68, 0.85); mix-blend-mode: multiply; }
.dynamic-cover.p-red .content { color: #ffffff; }
.dynamic-cover.p-red .t-grd { background: #ffffff; color: #ef4444; display: inline-block; padding: 1cqw 2.5cqw; }

.dynamic-cover.p-grn .overlay { background: rgba(22, 101, 52, 0.85); }
.dynamic-cover.p-grn .content { color: #ffffff; }
.dynamic-cover.p-grn .t-grd { color: #facc15; }
.dynamic-cover.p-grn .t-sub { color: #86efac; }

.dynamic-cover.p-ora .overlay { background: rgba(234, 88, 12, 0.85); }
.dynamic-cover.p-ora .content { color: #ffffff; }
.dynamic-cover.p-ora .t-grd { color: #facc15; }