/* ========== RESET & BASE ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy:    #1a2a4a;
  --navy-light: #273a5e;
  --gray-50: #f4f6f9;
  --gray-100:#e8ecf1;
  --gray-200:#d1d9e6;
  --gray-500:#6b7a94;
  --gray-700:#3d4f6f;
  --white:   #ffffff;
  --orange:  #f97316;
  --orange-hover: #ea580c;
  --green:   #10b981;
  --red:     #ef4444;
  --blue:    #3b82f6;
  --purple:  #a855f7;
  --shadow:  0 2px 12px rgba(26,42,74,0.08);
  --radius:  12px;
  --radius-sm: 8px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--gray-50);
  color: var(--navy);
  line-height: 1.6;
  min-height: 100vh;
}

.page { display: none; min-height: 100vh; }
.page.active { display: block; }

/* ========== NAVBAR ========== */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 40px;
  background: var(--navy);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
  cursor: pointer;
}

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  background: var(--orange);
  color: var(--white);
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1.1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a {
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--white); }

.btn-nav {
  background: var(--orange) !important;
  color: var(--white) !important;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600 !important;
  transition: background 0.2s !important;
}
.btn-nav:hover { background: var(--orange-hover) !important; color: var(--white) !important; }

.level-filter select {
  background: rgba(255,255,255,0.12);
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: 0.85rem;
  cursor: pointer;
}
.level-filter select option { background: var(--navy); color: var(--white); }

/* ========== BUTTONS ========== */
.btn-primary {
  background: var(--orange);
  color: var(--white);
  border: none;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-block;
  text-decoration: none;
}
.btn-primary:hover { background: var(--orange-hover); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(249,115,22,0.3); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-secondary {
  background: transparent;
  color: var(--navy);
  border: 2px solid var(--gray-200);
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-block;
  text-decoration: none;
}
.btn-secondary:hover { border-color: var(--navy); background: var(--gray-50); }

.btn-danger {
  background: var(--red);
  color: var(--white);
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-danger:hover { background: #dc2626; }

.btn-small {
  padding: 6px 14px;
  font-size: 0.8rem;
}

/* ========== HERO ========== */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 40px 100px;
}

.hero h1 {
  font-family: 'Playfair Display', serif;
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1.15;
  color: var(--navy);
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--gray-500);
  margin-bottom: 12px;
  max-width: 480px;
  line-height: 1.7;
}

.hero-subtitle-secondary {
  font-size: 0.95rem;
  color: var(--gray-700);
  margin-bottom: 36px;
}

.hero-actions { display: flex; gap: 16px; margin-bottom: 48px; }

.hero-stats { display: flex; gap: 40px; }

.stat { display: flex; flex-direction: column; }
.stat-num { font-size: 1.5rem; font-weight: 700; color: var(--navy); }
.stat-label { font-size: 0.85rem; color: var(--gray-500); margin-top: 2px; }

.card-preview {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow), 0 8px 32px rgba(26,42,74,0.12);
  max-width: 380px;
  width: 100%;
  border: 1px solid var(--gray-100);
}

.card-tag {
  display: inline-block;
  background: rgba(249,115,22,0.1);
  color: var(--orange);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-preview h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
  line-height: 1.4;
}

.card-preview p {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin-bottom: 18px;
  line-height: 1.6;
}

.card-meta {
  display: flex;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--gray-500);
  padding-top: 14px;
  border-top: 1px solid var(--gray-100);
}

/* ========== FEATURES ========== */
.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px 80px;
}

.feature-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  transition: transform 0.2s, box-shadow 0.2s;
  text-align: left;
  font: inherit;
  cursor: pointer;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(26,42,74,0.12); }
.feature-card:focus-visible {
  outline: 3px solid rgba(249,115,22,0.35);
  outline-offset: 3px;
}

.feature-icon { font-size: 2rem; margin-bottom: 16px; }

.feature-card h3 { font-size: 1rem; font-weight: 700; color: var(--navy); margin-bottom: 8px; }

.feature-card p { font-size: 0.88rem; color: var(--gray-500); line-height: 1.6; }

/* ========== LEVEL SELECTOR ========== */
.level-selector-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 60px 24px 80px;
}

.level-step { display: none; }
.level-step.active { display: block; }

.level-selector-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 48px 40px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  text-align: center;
}

.level-badge {
  display: inline-block;
  background: rgba(26,42,74,0.08);
  color: var(--navy);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.level-selector-card h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.level-subtitle {
  color: var(--gray-500);
  font-size: 0.95rem;
  margin-bottom: 28px;
}

.step-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 32px;
}

.step-dot {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--gray-200);
  color: var(--gray-500);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
}
.step-dot.active { background: var(--navy); color: var(--white); }
.step-dot.done { background: var(--green); color: var(--white); }

.step-line {
  width: 60px; height: 3px;
  background: var(--gray-200);
}
.step-line.active { background: var(--navy); }

.level-selector-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 20px;
}

.grade-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 32px;
}

.grade-option {
  background: var(--gray-50);
  border: 2px solid var(--gray-100);
  border-radius: var(--radius-sm);
  padding: 18px 12px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.grade-option:hover { border-color: var(--navy); }
.grade-option.selected {
  border-color: var(--orange);
  background: rgba(249,115,22,0.06);
}

.grade-label { font-size: 0.95rem; font-weight: 700; color: var(--navy); }
.grade-range { font-size: 0.8rem; color: var(--gray-500); }

.level-actions {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
}

.skip-link {
  color: var(--orange);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}
.skip-link:hover { text-decoration: underline; }

/* Level Grid Table */
.level-grid-header {
  display: grid;
  grid-template-columns: 36px 60px 1fr 80px 100px 80px;
  gap: 8px;
  padding: 10px 12px;
  background: var(--navy);
  color: var(--white);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  text-align: left;
}

.level-grid {
  border: 1px solid var(--gray-100);
  border-top: none;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  overflow: hidden;
  margin-bottom: 32px;
}

.level-grid-row {
  display: grid;
  grid-template-columns: 36px 60px 1fr 80px 100px 80px;
  gap: 8px;
  padding: 12px;
  align-items: center;
  border-bottom: 1px solid var(--gray-100);
  cursor: pointer;
  transition: all 0.15s;
  text-align: left;
  font-size: 0.85rem;
}
.level-grid-row:last-child { border-bottom: none; }
.level-grid-row:hover { background: var(--gray-50); }
.level-grid-row.selected {
  background: rgba(249,115,22,0.08);
  border-left: 3px solid var(--orange);
}

.level-check {
  color: var(--green);
  font-weight: 700;
  font-size: 1rem;
}

.level-cell { color: var(--gray-700); }
.level-name-cell { font-weight: 600; }

/* ========== ASSESSMENT ========== */
.assessment-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 60px 24px 80px;
}

.assess-step { display: none; }
.assess-step.active { display: block; }

.assess-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 48px 40px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  text-align: center;
}

.assess-badge {
  display: inline-block;
  background: rgba(26,42,74,0.08);
  color: var(--navy);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.assess-card h2 { font-size: 1.8rem; font-weight: 700; color: var(--navy); margin-bottom: 12px; }

.assess-card p { color: var(--gray-500); font-size: 1rem; margin-bottom: 32px; line-height: 1.7; }

.assess-details {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 36px;
}

.detail {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 0.9rem;
  color: var(--gray-700);
}
.detail span:first-child { font-size: 1.3rem; }

.assess-progress { margin-bottom: 32px; }

.progress-bar {
  height: 6px;
  background: var(--gray-100);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-fill {
  height: 100%;
  background: var(--orange);
  border-radius: 3px;
  transition: width 0.4s ease;
  width: 0%;
}

.progress-text { font-size: 0.8rem; color: var(--gray-500); font-weight: 600; }

.question-tag {
  display: inline-block;
  background: rgba(26,42,74,0.08);
  color: var(--navy);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

#questionText {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 20px;
  line-height: 1.5;
  text-align: left;
}

.question-passage {
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-bottom: 24px;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--gray-700);
  text-align: left;
  border-left: 3px solid var(--navy);
}

.question-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
  text-align: left;
}

.question-options label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  border: 2px solid transparent;
  font-size: 0.95rem;
  line-height: 1.5;
}
.question-options label:hover { border-color: var(--navy); background: rgba(26,42,74,0.04); }
.question-options input[type="radio"] { margin-top: 3px; accent-color: var(--orange); }
.question-options label.selected { border-color: var(--orange); background: rgba(249,115,22,0.06); }

#btnNext { width: 100%; }

/* Result Card */
.result-card { text-align: center; }

.result-icon { font-size: 3.5rem; margin-bottom: 16px; }

.result-level-badge {
  display: inline-block;
  background: var(--orange);
  color: var(--white);
  font-size: 1.3rem;
  font-weight: 800;
  padding: 12px 36px;
  border-radius: var(--radius);
  margin: 16px 0 28px;
  letter-spacing: 1px;
}

.result-details {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.result-detail {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 12px;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
}

.detail-label { font-size: 0.75rem; color: var(--gray-500); text-transform: uppercase; letter-spacing: 0.5px; font-weight: 600; }
.detail-value { font-size: 0.95rem; font-weight: 700; color: var(--navy); }

.result-details.full-table {
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 24px;
}

.result-desc {
  color: var(--gray-500);
  font-size: 0.95rem;
  margin-bottom: 32px;
  line-height: 1.7;
}

.result-actions { display: flex; gap: 16px; justify-content: center; }

/* ========== LIBRARY ========== */
.library-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 40px 80px;
}

.daily-recommendations {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  margin-bottom: 32px;
}

.section-eyebrow {
  display: inline-block;
  color: var(--orange);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.daily-recommendations h2 {
  font-size: 1.35rem;
  color: var(--navy);
  margin-bottom: 6px;
}

.daily-recommendations p {
  color: var(--gray-500);
  margin-bottom: 22px;
  line-height: 1.6;
}

.daily-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.library-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.library-header h2 { font-size: 1.6rem; font-weight: 700; color: var(--navy); }

.library-search input {
  background: var(--white);
  border: 2px solid var(--gray-100);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  font-size: 0.9rem;
  width: 260px;
  color: var(--navy);
  outline: none;
  transition: border-color 0.2s;
}
.library-search input:focus { border-color: var(--navy); }
.library-search input::placeholder { color: var(--gray-200); }

.category-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.cat-tab {
  background: var(--white);
  border: 2px solid var(--gray-100);
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  color: var(--gray-500);
}
.cat-tab:hover { border-color: var(--navy); color: var(--navy); }
.cat-tab.active { background: var(--navy); color: var(--white); border-color: var(--navy); }

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.article-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}
.article-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(26,42,74,0.12); }

.article-card-body { padding: 22px; }

.article-card.compact .article-card-body { padding: 18px; }
.article-card.compact h3 { font-size: 0.98rem; }
.article-card.compact p { -webkit-line-clamp: 3; }

.article-card .card-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.tag-level, .tag-cat, .tag-source {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.tag-level { background: rgba(249,115,22,0.1); color: var(--orange); }
.tag-level.l0 { background: rgba(16,185,129,0.1); color: var(--green); }
.tag-level.l1 { background: rgba(59,130,246,0.1); color: var(--blue); }
.tag-level.l2 { background: rgba(168,85,247,0.1); color: var(--purple); }
.tag-level.l3 { background: rgba(249,115,22,0.1); color: var(--orange); }
.tag-level.l4 { background: rgba(239,68,68,0.1); color: var(--red); }
.tag-level.l5 { background: rgba(26,42,74,0.1); color: var(--navy); }

.tag-cat { background: rgba(26,42,74,0.08); color: var(--navy); }
.tag-source { background: rgba(107,122,148,0.12); color: var(--gray-700); }

.article-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
  line-height: 1.4;
}

.article-card p {
  font-size: 0.85rem;
  color: var(--gray-500);
  line-height: 1.6;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card .card-footer {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  font-size: 0.78rem;
  color: var(--gray-500);
  padding-top: 14px;
  border-top: 1px solid var(--gray-100);
  flex-wrap: wrap;
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.page-btn {
  background: var(--white);
  border: 2px solid var(--gray-100);
  color: var(--navy);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-weight: 700;
  cursor: pointer;
}

.page-btn.active {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}

.page-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.page-status {
  color: var(--gray-500);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0 8px;
}

/* ========== ARTICLE DETAIL ========== */
.article-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.article-header { margin-bottom: 36px; }

.article-tags { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }

.article-header h1 {
  font-family: 'Playfair Display', serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.3;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--gray-500);
  flex-wrap: wrap;
}

.article-meta a {
  color: var(--orange);
  font-weight: 700;
  text-decoration: none;
}

.article-meta a:hover { text-decoration: underline; }

.article-body {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--gray-700);
  margin-bottom: 48px;
}

.article-body p { margin-bottom: 20px; }
.article-body h2 { font-size: 1.3rem; font-weight: 700; color: var(--navy); margin: 32px 0 16px; }
.article-body h3 { font-size: 1.1rem; font-weight: 700; color: var(--navy); margin: 24px 0 12px; }
.article-body blockquote {
  border-left: 4px solid var(--orange);
  padding: 12px 20px;
  background: rgba(249,115,22,0.04);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
  font-style: italic;
  color: var(--gray-700);
}

.material-section,
.vocabulary-section,
.article-quiz-section,
.ai-check-section {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  margin-bottom: 32px;
}

.material-section h2,
.vocabulary-section h2,
.article-quiz-section h2,
.ai-check-section h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 20px;
}

.section-note {
  color: var(--gray-500);
  font-size: 0.92rem;
  margin: -8px 0 18px;
}

#keyVocabularyGrid,
#wordWorkGrid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

#keyVocabularyGrid { margin-bottom: 24px; }

.vocab-subtitle {
  font-size: 1rem;
  color: var(--navy);
  margin: 12px 0 12px;
}

.vocab-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.vocab-card strong {
  display: block;
  font-size: 1rem;
  color: var(--navy);
  margin-bottom: 6px;
}

.vocab-card p {
  color: var(--gray-700);
  font-size: 0.88rem;
  line-height: 1.5;
  margin-bottom: 8px;
}

.vocab-card input {
  width: 100%;
  border: 2px solid var(--gray-100);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-family: inherit;
  color: var(--navy);
  outline: none;
}

.vocab-card input:focus { border-color: var(--navy); }

.vocab-card.study input { display: none; }

.material-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.material-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  background: var(--gray-50);
  border: 2px solid var(--gray-100);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--navy);
  transition: all 0.2s;
}

.material-card:hover {
  border-color: var(--orange);
  transform: translateY(-2px);
}

.material-card span {
  color: var(--orange);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.material-card strong {
  font-size: 0.95rem;
  line-height: 1.4;
}

.quiz-question {
  margin-bottom: 18px;
}

.quiz-question label,
.ai-check-section label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.quiz-question textarea,
.ai-check-section textarea {
  width: 100%;
  min-height: 92px;
  padding: 12px 14px;
  border: 2px solid var(--gray-100);
  border-radius: var(--radius-sm);
  resize: vertical;
  color: var(--navy);
  font-family: inherit;
  font-size: 0.95rem;
  line-height: 1.6;
  outline: none;
}

.quiz-question textarea:focus,
.ai-check-section textarea:focus {
  border-color: var(--navy);
}

.quiz-result,
.ai-feedback {
  margin-top: 18px;
  padding: 18px;
  background: var(--gray-50);
  border-left: 4px solid var(--green);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--gray-700);
  font-size: 0.92rem;
}

.quiz-result h3,
.ai-feedback h3 {
  color: var(--navy);
  margin-bottom: 8px;
}

.quiz-result ul,
.ai-feedback ul {
  padding-left: 18px;
  line-height: 1.7;
}

.debate-section {
  background: var(--white);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  margin-bottom: 36px;
}

.debate-section h2 { font-size: 1.4rem; font-weight: 700; color: var(--navy); margin-bottom: 24px; }

.debate-motion {
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-bottom: 24px;
  border-left: 4px solid var(--orange);
}

.debate-motion h3 { font-size: 0.85rem; font-weight: 700; color: var(--orange); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 8px; }
.debate-motion p { font-size: 1.1rem; font-weight: 600; color: var(--navy); }

.debate-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.points-for, .points-against {
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.points-for h4 { color: var(--green); font-size: 0.95rem; margin-bottom: 12px; }
.points-against h4 { color: var(--red); font-size: 0.95rem; margin-bottom: 12px; }

.points-for ul, .points-against ul {
  padding-left: 18px;
  font-size: 0.9rem;
  color: var(--gray-700);
  line-height: 1.7;
}

.discussion-questions {
  background: rgba(26,42,74,0.04);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.discussion-questions h4 { font-size: 0.95rem; font-weight: 700; color: var(--navy); margin-bottom: 12px; }
.discussion-questions ol { padding-left: 20px; font-size: 0.9rem; color: var(--gray-700); line-height: 1.8; }

.article-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ========== ABOUT ========== */
.about-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 60px 40px 80px;
}

.about-container h1 {
  font-family: 'Playfair Display', serif;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 16px;
}

.about-intro {
  font-size: 1.1rem;
  color: var(--gray-500);
  line-height: 1.8;
  margin-bottom: 48px;
  max-width: 700px;
}

.levels-table h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 20px;
}

.table-scroll {
  overflow-x: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
}

.full-levels-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  min-width: 900px;
}

.full-levels-table th {
  background: var(--navy);
  color: var(--white);
  padding: 14px 14px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  text-align: left;
  white-space: nowrap;
}

.full-levels-table td {
  padding: 14px 14px;
  font-size: 0.85rem;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
  white-space: nowrap;
}
.full-levels-table tr:last-child td { border-bottom: none; }
.full-levels-table tr:hover { background: var(--gray-50); }

.about-sources { margin-top: 48px; }
.about-sources h2 { font-size: 1.4rem; font-weight: 700; color: var(--navy); margin-bottom: 20px; }

.debate-training {
  margin-top: 48px;
}

.debate-training h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 20px;
}

.debate-flow-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 24px;
}

.debate-flow-item {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.debate-flow-item span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--orange);
  color: var(--white);
  font-weight: 800;
  margin-bottom: 14px;
}

.debate-flow-item h3 {
  font-size: 1rem;
  color: var(--navy);
  margin-bottom: 8px;
}

.debate-flow-item p {
  color: var(--gray-500);
  font-size: 0.9rem;
  line-height: 1.6;
}

.sources-note {
  color: var(--gray-500);
  max-width: 760px;
  margin-bottom: 20px;
  line-height: 1.7;
}

.source-logo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
}

.source-logo-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 12px;
}

.source-logo-card strong {
  font-size: 0.92rem;
  color: var(--navy);
  line-height: 1.35;
}

.source-logo-card img,
.source-logo-fallback {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  flex: 0 0 42px;
}

.source-logo-card img {
  object-fit: contain;
  background: var(--white);
  border: 1px solid var(--gray-100);
  padding: 5px;
}

.source-logo-fallback {
  background: var(--orange);
  color: var(--white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
}

/* ========== ADMIN ========== */
.admin-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 40px 80px;
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.admin-header h2 { font-size: 1.6rem; font-weight: 700; color: var(--navy); }

.admin-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  margin-bottom: 32px;
}

.admin-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--gray-100);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 2px solid var(--gray-100);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--navy);
  outline: none;
  transition: border-color 0.2s;
  font-family: inherit;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--navy); }

.form-group textarea { min-height: 120px; resize: vertical; }

.form-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.phone-row {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 8px;
}

.field-hint {
  margin-top: 6px;
  color: var(--gray-500);
  font-size: 0.78rem;
  line-height: 1.4;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 0.85rem;
}

.admin-table th {
  background: var(--navy);
  color: var(--white);
  padding: 12px 14px;
  font-weight: 700;
  text-align: left;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.admin-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
}
.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover { background: var(--gray-50); }

.admin-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.admin-pill {
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-sm);
  color: var(--navy);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 7px 10px;
}

.login-box {
  max-width: 400px;
  margin: 80px auto;
  text-align: center;
}

.login-box h2 { margin-bottom: 8px; }
.login-box p { color: var(--gray-500); margin-bottom: 24px; }

/* ========== RESPONSIVE ========== */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding: 40px 24px 60px; }
  .hero h1 { font-size: 2.2rem; }
  .hero-visual { display: none; }
  .features { grid-template-columns: 1fr 1fr; }
  .navbar { padding: 14px 20px; }
  .nav-links { gap: 14px; }
  .debate-points { grid-template-columns: 1fr; }
  .result-details { grid-template-columns: 1fr; }
  .result-details.full-table { grid-template-columns: repeat(2, 1fr); }
  .library-header { flex-direction: column; gap: 16px; align-items: flex-start; }
  .library-search input { width: 100%; }
  .daily-grid { grid-template-columns: 1fr; }
  .grade-grid { grid-template-columns: repeat(2, 1fr); }
  .debate-flow-grid { grid-template-columns: 1fr; }
  .level-grid-header,
  .level-grid-row { grid-template-columns: 30px 50px 1fr 60px 80px 60px; }
  .form-row { grid-template-columns: 1fr; }
  .form-row-2 { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .features { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .hero-actions { flex-direction: column; }
  .assess-card { padding: 32px 20px; }
  .assess-details { flex-direction: column; gap: 12px; }
  .result-actions { flex-direction: column; }
  .article-container { padding: 24px 16px 60px; }
  .debate-section { padding: 24px 18px; }
  .material-section,
  .article-quiz-section,
  .ai-check-section { padding: 24px 18px; }
  .article-footer { flex-direction: column; gap: 12px; align-items: flex-start; }
  .grade-grid { grid-template-columns: 1fr; }
  .level-selector-card { padding: 32px 20px; }
  .level-grid-header,
  .level-grid-row { grid-template-columns: 28px 40px 1fr 50px 70px 50px; font-size: 0.75rem; }
  .about-container { padding: 40px 20px 60px; }
  .admin-container { padding: 24px 16px 60px; }
}

@media print {
  .navbar,
  .article-footer,
  .ai-check-section button,
  .article-quiz-section button {
    display: none !important;
  }

  body {
    background: var(--white);
    color: #111827;
  }

  .page { display: none !important; }
  #page-article.active { display: block !important; }

  .article-container {
    max-width: none;
    padding: 0;
  }

  .debate-section,
  .material-section,
  .article-quiz-section,
  .ai-check-section {
    box-shadow: none;
    break-inside: avoid;
  }
}