/* Labs — modern koyu arayüz, cam yüzeyler */
:root {
  --bg: #06070a;
  --bg-soft: #0c0d12;
  --surface: rgba(18, 19, 26, 0.72);
  --surface2: rgba(28, 30, 40, 0.82);
  --surface3: rgba(38, 40, 52, 0.9);
  --text: #ececf1;
  --text-muted: #8b8b9e;
  --accent: #b8e85c;
  --accent-dim: rgba(184, 232, 92, 0.14);
  --accent-glow: rgba(184, 232, 92, 0.35);
  --accent-hover: #c9f070;
  --success: #b8e85c;
  --danger: #f87171;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --font: 'Outfit', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --border: 1px solid rgba(255, 255, 255, 0.08);
  --border-strong: 1px solid rgba(255, 255, 255, 0.12);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
  --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 48px rgba(184, 232, 92, 0.08);
  --glass: blur(20px) saturate(1.35);
  --space: 1.25rem;
  --space-lg: 2rem;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 100% 80% at 50% -30%, rgba(184, 232, 92, 0.09), transparent 55%),
    radial-gradient(ellipse 55% 40% at 100% 20%, rgba(139, 124, 247, 0.07), transparent 50%),
    radial-gradient(ellipse 50% 45% at 0% 85%, rgba(34, 211, 238, 0.06), transparent 50%),
    linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 38%, var(--bg) 100%);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: 0.01em;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse 60% 35% at 50% 100%, rgba(184, 232, 92, 0.035), transparent 55%);
  pointer-events: none;
  z-index: 0;
}

.app {
  max-width: 640px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 1;
}
@media (min-width: 768px) {
  .app { max-width: 720px; }
}

.header {
  display: flex;
  align-items: center;
  gap: var(--space);
  padding: 0.65rem 1.25rem;
  background: rgba(6, 7, 10, 0.75);
  backdrop-filter: var(--glass);
  -webkit-backdrop-filter: var(--glass);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-brand { display: flex; align-items: center; gap: 0.5rem; flex-shrink: 0; }
.logo {
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--accent);
  letter-spacing: -0.02em;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  padding: 0;
}
.logo:hover { color: var(--accent-hover); }
.course-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: none;
}
.course-subtitle.visible { display: inline; }
.nav { display: flex; gap: 0.15rem; flex: 1; justify-content: center; }
.nav.hidden { display: none; }
.progress-pill.hidden { display: none; }
.nav-btn {
  font-family: var(--font);
  font-size: 0.8rem;
  padding: 0.5rem 0.85rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition:
    color 0.2s ease,
    background 0.2s ease,
    box-shadow 0.2s ease;
}
.nav-btn:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}
.nav-btn.active {
  color: var(--accent);
  background: linear-gradient(145deg, rgba(184, 232, 92, 0.18), rgba(184, 232, 92, 0.08));
  font-weight: 600;
  box-shadow:
    inset 0 0 0 1px rgba(184, 232, 92, 0.28),
    0 4px 20px rgba(0, 0, 0, 0.2);
}
.progress-pill {
  font-size: 0.72rem;
  color: var(--accent);
  background: rgba(184, 232, 92, 0.1);
  border: 1px solid rgba(184, 232, 92, 0.2);
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
}

.main { flex: 1; padding: var(--space-lg) var(--space); max-width: 720px; margin: 0 auto; width: 100%; }
@media (min-width: 1024px) {
  .main { padding: 2rem 2rem; }
}
.page-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: var(--space);
  color: var(--text);
  letter-spacing: -0.03em;
  line-height: 1.2;
}
.section-intro--short { margin-bottom: var(--space); font-size: 0.9rem; }

.view { display: none; }
.view.active {
  display: block;
  animation: viewIn 0.4s cubic-bezier(0.22, 1, 0.36, 1) both;
}
@keyframes viewIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero {
  text-align: center;
  padding: 2rem 0 2.5rem;
}
.hero h1 {
  font-size: 2rem;
  margin-bottom: 0.25rem;
  letter-spacing: -0.03em;
  font-weight: 600;
  color: var(--text);
}
.tagline {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}
.hero-intro {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
  margin: 0 auto 1.25rem;
}
.section-intro {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--space);
  line-height: 1.5;
}
.quiz-setup-p { margin-bottom: 0.75rem; }

.quiz-mode-tabs { display: flex; gap: 0.35rem; margin-bottom: var(--space); }
.quiz-mode-btn {
  font-family: var(--font);
  font-size: 0.85rem;
  padding: 0.5rem 0.9rem;
  background: var(--surface2);
  color: var(--text-muted);
  border: var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color .15s, background .15s;
}
.quiz-mode-btn:hover { color: var(--text); background: var(--surface); }
.quiz-mode-btn.active { background: var(--accent-dim); color: var(--accent); font-weight: 500; }

.flashcards-wrap { margin-top: 0.5rem; }
.flashcards-hint { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1.25rem; }
.flashcard-container { perspective: 1200px; margin-bottom: 1.5rem; }
.flashcard { max-width: 440px; margin: 0 auto; min-height: 200px; cursor: pointer; }
.flashcard-inner {
  position: relative;
  width: 100%;
  min-height: 200px;
  transition: transform 0.45s ease;
  transform-style: preserve-3d;
}
.flashcard.flipped .flashcard-inner { transform: rotateY(180deg); }
.flashcard-front,
.flashcard-back {
  position: absolute;
  width: 100%;
  min-height: 200px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 1.75rem;
  border-radius: var(--radius);
  border: var(--border);
}
.flashcard-front {
  background: var(--surface);
  color: var(--accent);
  font-size: 1.3rem;
  font-weight: 700;
  text-align: center;
}
.flashcard-back {
  background: var(--surface2);
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.55;
  text-align: left;
  transform: rotateY(180deg);
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
}
.flashcard-back p { margin: 0 0 0.75rem 0; }
.glossary-audio {
  width: 100%;
  max-height: 40px;
  margin-top: 0.5rem;
  border-radius: var(--radius-sm);
}
.flashcard-nav { display: flex; align-items: center; justify-content: center; gap: 1rem; }
.flashcard-counter { font-family: var(--font-mono); font-size: 0.9rem; color: var(--text-muted); min-width: 4rem; text-align: center; }

.hero-stats { margin-bottom: 1.25rem; font-size: 0.85rem; color: var(--text-muted); }
.hero-stats span { color: var(--accent); font-weight: 600; }
.cta {
  font-family: var(--font);
  font-size: 0.9rem;
  padding: 0.68rem 1.45rem;
  background: linear-gradient(145deg, var(--accent-hover) 0%, var(--accent) 100%);
  color: #0a0b0f;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-weight: 600;
  letter-spacing: 0.01em;
  box-shadow:
    0 4px 20px rgba(184, 232, 92, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    filter 0.2s ease;
}
.cta:hover {
  filter: brightness(1.06);
  box-shadow:
    0 6px 28px rgba(184, 232, 92, 0.32),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
}
.cta:active {
  transform: scale(0.98);
}
.cta-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border: var(--border-strong);
  box-shadow: none;
}
.cta-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--accent);
  border-color: rgba(184, 232, 92, 0.35);
  filter: none;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.labs-hero { text-align: center; margin-bottom: 2rem; }
.labs-hero h1 { font-size: 1.75rem; margin-bottom: 0.25rem; font-weight: 600; }
.labs-hero .tagline { color: var(--text-muted); font-size: 0.9rem; }
.labs-cards { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 480px) {
  .labs-cards { grid-template-columns: repeat(2, 1fr); }
}
.labs-card {
  position: relative;
  background: linear-gradient(155deg, rgba(255, 255, 255, 0.07) 0%, rgba(255, 255, 255, 0.02) 100%);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: calc(var(--radius) + 2px);
  padding: 1.6rem 1.35rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition:
    transform 0.3s cubic-bezier(0.22, 1, 0.36, 1),
    border-color 0.25s ease,
    box-shadow 0.3s ease;
  cursor: pointer;
  box-shadow: var(--shadow-soft);
}
.labs-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(184, 232, 92, 0.25), transparent 40%, transparent 60%, rgba(139, 124, 247, 0.15));
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.labs-card:hover {
  transform: translateY(-3px);
  border-color: rgba(184, 232, 92, 0.35);
  box-shadow: var(--shadow-soft), var(--shadow-glow);
}
.labs-card:hover::before {
  opacity: 1;
}
.labs-card > * {
  position: relative;
  z-index: 1;
}
.labs-card h2 { font-size: 1.15rem; margin-bottom: 0.35rem; font-weight: 600; }
.labs-card p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1rem; line-height: 1.45; flex: 1; }
.labs-card .cta { width: 100%; max-width: 140px; }

.week-cards { display: grid; gap: 0.5rem; }
.week-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.15rem;
  background: rgba(255, 255, 255, 0.04);
  border: var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease,
    box-shadow 0.2s ease;
  text-align: left;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}
.week-card:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(184, 232, 92, 0.25);
  transform: translateX(2px);
}
.week-card.done {
  background: linear-gradient(90deg, rgba(184, 232, 92, 0.14), rgba(255, 255, 255, 0.03));
  border-color: rgba(184, 232, 92, 0.28);
}
.week-num {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--surface2);
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.week-card.done .week-num { background: var(--accent); color: var(--bg); }
.week-info h3 { font-size: 0.95rem; margin-bottom: 0.15rem; font-weight: 600; }
.week-info p { font-size: 0.82rem; color: var(--text-muted); line-height: 1.4; }

.back-btn {
  font-family: var(--font);
  font-size: 0.85rem;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  margin-bottom: var(--space);
  padding: 0.2rem 0;
  transition: color .15s;
}
.back-btn:hover { color: var(--accent); }

h2 { font-size: 1.2rem; font-weight: 600; margin-bottom: 0.75rem; color: var(--text); }
.module-list { display: flex; flex-direction: column; gap: 0.5rem; }
.module-list-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.15rem;
  background: rgba(255, 255, 255, 0.04);
  border: var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease,
    box-shadow 0.2s ease;
  text-align: left;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
}
.module-list-card:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(184, 232, 92, 0.22);
  transform: translateX(2px);
}
.module-list-card.done {
  background: linear-gradient(90deg, rgba(184, 232, 92, 0.12), rgba(255, 255, 255, 0.03));
  border-color: rgba(184, 232, 92, 0.25);
}
.module-list-num {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--surface2);
  color: var(--accent);
  font-weight: 600;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.module-list-card.done .module-list-num { background: var(--accent); color: var(--bg); }
.module-list-info { flex: 1; min-width: 0; }
.module-list-info h3 { font-size: 0.95rem; margin-bottom: 0.15rem; font-weight: 600; }
.module-list-info p { font-size: 0.82rem; color: var(--text-muted); line-height: 1.4; }
.module-list-arrow { font-size: 0.9rem; color: var(--text-muted); flex-shrink: 0; }
.module-list-card:hover .module-list-arrow { color: var(--accent); }

#view-module-detail.active {
  display: flex;
  flex-direction: column;
  min-height: 65vh;
}
.module-detail { padding-bottom: 1rem; }
.module-detail.module-detail--app {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}
.module-detail-hero { margin-bottom: 1rem; flex-shrink: 0; }
.module-tabs {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 0.75rem;
  flex-shrink: 0;
  border-bottom: var(--border);
  padding-bottom: 0.5rem;
}
.module-tab {
  font-family: var(--font);
  font-size: 0.8rem;
  padding: 0.5rem 0.85rem;
  background: none;
  border: none;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color .15s, background .15s;
}
.module-tab:hover { color: var(--text); background: var(--surface2); }
.module-tab.active { color: var(--accent); background: var(--accent-dim); font-weight: 500; }
.module-tab-panels {
  flex: 1;
  min-height: 280px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.module-tab-panel {
  display: none;
  animation: tabFadeIn 0.2s ease;
}
.module-tab-panel.active { display: block; }
.module-tab-panel { padding: 0.25rem 0; }
@keyframes tabFadeIn { from { opacity: 0; } to { opacity: 1; } }
.module-lesson-actions {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: var(--border);
  font-size: 0.85rem;
}
.module-lesson-actions .link-btn { margin-right: 0.75rem; }
.module-pdf-inline {
  margin-bottom: var(--space);
  background: var(--surface2);
  border-radius: var(--radius-sm);
  border: var(--border);
  padding: 0.75rem 0.75rem 0.85rem;
}
.module-pdf-inline-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}
.module-pdf-inline-header-right {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.module-pdf-inline-counter {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.module-pdf-inline-body {
  max-height: 260px;
  overflow: hidden;
}
.module-pdf-inline-body canvas {
  width: 100%;
  height: auto;
  display: block;
}
.module-pdf-inline-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
}
.slide-btn.mini {
  width: 32px;
  height: 32px;
  font-size: 1.2rem;
}
.presentation-progress.mini {
  flex: 1;
  height: 4px;
  background: var(--surface3);
  border-radius: 999px;
  overflow: hidden;
}
.module-tab-panel .module-topics-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.module-tab-panel .module-topics-list li {
  padding: 0.5rem 0;
  padding-left: 1rem;
  position: relative;
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.5;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.module-tab-panel .module-topics-list li:last-child { border-bottom: none; }
.module-tab-panel .module-topics-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.75rem;
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
}
.module-tab-panel .module-links { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.module-detail-title {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.35rem;
  line-height: 1.3;
}
.module-detail-teaser { color: var(--text-muted); font-size: 0.9rem; line-height: 1.5; }
.module-section-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}
.module-actions-wrap { margin-bottom: var(--space-lg); }
.module-actions { display: grid; gap: 0.75rem; grid-template-columns: 1fr 1fr; }
@media (max-width: 560px) { .module-actions { grid-template-columns: 1fr; } }
.module-actions .module-action-card:only-child { grid-column: 1 / -1; }
.module-action-card {
  background: var(--surface);
  border: var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.module-action-card .module-action-label { font-size: 0.7rem; font-weight: 600; color: var(--accent); text-transform: uppercase; letter-spacing: 0.04em; }
.module-action-card .module-action-desc { font-size: 0.85rem; color: var(--text-muted); margin: 0; line-height: 1.4; }
.module-action-card .cta { margin-top: 0.2rem; align-self: flex-start; font-size: 0.85rem; padding: 0.5rem 1rem; }
.module-action-card .module-scroll-videos, .module-action-card .module-scroll-lesson { text-decoration: none; }
.module-action-meta { font-size: 0.8rem; color: var(--text-muted); }
.module-lesson { margin-bottom: var(--space-lg); }
.lesson-block {
  margin-bottom: 1rem;
  padding: 1rem 1.1rem;
  background: var(--surface);
  border: var(--border);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent);
}
.lesson-block:last-child { margin-bottom: 0; }
.lesson-block-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
}
.lesson-block-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background: var(--accent-dim);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  flex-shrink: 0;
}
.lesson-block-list { padding-left: 1.1rem; margin: 0; font-size: 0.9rem; line-height: 1.5; color: var(--text-muted); }
.lesson-block-list li { margin-bottom: 0.3rem; }
.lesson-block-img-wrap {
  margin: 0.75rem 0 1rem;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: var(--border);
  max-width: 100%;
}
.lesson-block-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 280px;
  object-fit: cover;
}
.lesson-block-detail {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0.5rem 0 0.75rem;
}
.module-lesson-footer {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.link-btn {
  font-family: var(--font);
  font-size: inherit;
  color: var(--accent);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
}
.link-btn:hover { color: var(--accent-hover); }
.module-content-section {
  margin-bottom: 2rem;
}
.module-content-section .module-topics-list {
  list-style: none;
  padding-left: 0;
}
.module-content-section .module-topics-list li {
  padding: 0.5rem 0;
  padding-left: 1.25rem;
  position: relative;
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.5;
}
.module-content-section .module-topics-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.75rem;
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
}
.module-slides-preview .module-toggle-slides {
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--accent);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem 0;
  text-align: left;
}
.module-slides-preview .module-toggle-slides:hover { text-decoration: underline; }
.module-slide-titles {
  list-style: none;
  padding-left: 1rem;
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.module-slide-titles li { margin-bottom: 0.35rem; }
.module-slide-titles.hidden { display: none; }
.module-resources { margin-bottom: 2rem; }
.module-resources .module-links { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.module-resource-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1rem;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  text-decoration: none;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 500;
  border: var(--border);
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease,
    box-shadow 0.2s ease;
}
.module-resource-link:hover {
  background: var(--accent);
  color: #0a0b0f;
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(184, 232, 92, 0.25);
}
.module-resource-link.cheatsheet { background: var(--accent-dim); color: var(--accent); border-color: rgba(207, 255, 51, 0.3); }
.module-resource-link.cheatsheet:hover { background: var(--accent); color: var(--bg); }
.module-resource-link[href="#"] { opacity: 0.6; pointer-events: none; }

.login-form {
  max-width: 420px;
  margin: 20px auto 0;
  display: grid;
  gap: 10px;
}
.login-label {
  font-weight: 600;
  color: rgba(255,255,255,0.82);
}
.login-input {
  width: 100%;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.35);
  color: var(--text);
  outline: none;
  font-family: var(--font);
  font-size: 0.9rem;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease;
}
.login-input:hover {
  border-color: rgba(255, 255, 255, 0.14);
}
.login-input:focus {
  border-color: rgba(184, 232, 92, 0.45);
  box-shadow:
    0 0 0 3px rgba(184, 232, 92, 0.12),
    0 4px 16px rgba(0, 0, 0, 0.25);
  background: rgba(0, 0, 0, 0.45);
}
.login-error {
  margin: 6px 0 0;
  color: rgba(248, 113, 113, 0.95);
  font-weight: 600;
}
.login-links {
  margin-top: 14px;
  display: flex;
  justify-content: center;
}
.module-detail h3 { font-size: 1.35rem; margin-bottom: 0.5rem; color: var(--accent); letter-spacing: -0.02em; }
.module-detail > p { color: var(--text-muted); font-size: 0.98rem; margin-bottom: 1rem; line-height: 1.6; }
.module-detail .module-topics-wrap {
  margin: 1.25rem 0;
  padding: 1.25rem 1.25rem;
  background: var(--surface);
  border: var(--border);
  border-radius: var(--radius);
}
.module-detail .module-topics-wrap h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
}
.module-detail .module-topics-list { list-style: none; }
.module-detail .module-topics-list li {
  padding: 0.5rem 0;
  padding-left: 1.25rem;
  position: relative;
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.5;
}
.module-detail .module-topics-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.75rem;
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
}
.module-detail .links { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.25rem; }
.module-detail .links a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: var(--surface2);
  color: var(--text);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  border: var(--border);
  transition: background .2s, border-color .2s;
}
.module-detail .links a:hover { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.module-detail .links a.cheatsheet { background: var(--accent-dim); color: var(--accent); border-color: rgba(207, 255, 51, 0.3); }
.module-detail .links a.cheatsheet:hover { background: var(--accent); color: var(--bg); }
.module-detail .links a[href="#"] { opacity: 0.6; pointer-events: none; }
.module-detail--app .mark-done-wrap { margin-top: auto; padding-top: var(--space); border-top: var(--border); flex-shrink: 0; }
.mark-done-wrap { margin-top: var(--space-lg); padding-top: var(--space); border-top: var(--border); }
.mark-done {
  font-family: var(--font);
  padding: 0.55rem 1.1rem;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: background .15s;
}
.mark-done:hover { background: var(--accent-hover); }
.mark-done.done { background: var(--surface2); color: var(--text-muted); cursor: default; border: var(--border); }

.module-videos-section { margin-top: 2rem; padding-top: 1.75rem; border-top: var(--border); }
.module-videos-section .module-section-title { margin-bottom: 1rem; }
.module-videos-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
}
.module-videos-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .module-videos-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .module-videos-grid { grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
}
.module-video-card {
  background: var(--surface);
  border: var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .2s, box-shadow .2s;
}
.module-video-card:hover { border-color: rgba(0, 212, 170, 0.3); box-shadow: var(--shadow); }
.module-video-card .video-wrap { aspect-ratio: 16/9; background: var(--surface2); }
.module-video-card iframe { width: 100%; height: 100%; border: none; display: block; }
.module-video-card .video-meta { padding: 0.75rem 1rem; }
.module-video-card .video-keyword {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 0.35rem;
}
.module-video-card .video-title { font-size: 0.95rem; font-weight: 500; line-height: 1.4; }
.module-detail .cta-presentation { margin-bottom: 1rem; }
.module-detail-hint { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 1rem; line-height: 1.5; }

.quiz-setup p { margin-bottom: 0.75rem; font-size: 0.9rem; color: var(--text-muted); }
.quiz-week-btns { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.quiz-week-btns button {
  font-family: var(--font);
  font-size: 0.85rem;
  padding: 0.5rem 0.85rem;
  background: var(--surface2);
  color: var(--text);
  border: var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background .15s, color .15s;
}
.quiz-week-btns button:hover { background: var(--surface3); color: var(--accent); }
.quiz-progress-bar { height: 4px; background: var(--surface2); border-radius: 2px; margin-bottom: 1.5rem; overflow: hidden; }
.quiz-progress-fill { height: 100%; background: var(--accent); width: 0%; transition: width .3s; }
.quiz-question { font-size: 1.1rem; margin-bottom: 1.25rem; font-weight: 500; }
.quiz-options { display: flex; flex-direction: column; gap: 0.5rem; }
.quiz-options button {
  font-family: var(--font);
  text-align: left;
  padding: 0.8rem 1rem;
  background: var(--surface);
  border: var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color .2s, background .2s;
}
.quiz-options button:hover { border-color: var(--accent); background: var(--surface2); }
.quiz-options button.correct { border-color: var(--success); background: var(--accent-dim); }
.quiz-options button.wrong { border-color: var(--danger); background: rgba(255, 71, 87, 0.1); }
.quiz-options button:disabled { cursor: default; opacity: .8; }
.quiz-next { margin-top: 1rem; padding: 0.65rem 1.25rem; background: var(--accent); color: var(--bg); border: none; border-radius: var(--radius-pill); font-family: var(--font); font-weight: 600; cursor: pointer; }
.quiz-next:hover { background: var(--accent-hover); }
.quiz-hint-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.quiz-hint-text { margin: 0 0 10px; color: #d7d4ff; font-size: 0.9rem; }
.quiz-answer-feedback { margin: 10px 0 0; color: var(--text-muted); font-size: 0.92rem; }
.hidden { display: none !important; }
.quiz-result h3 { margin-bottom: 0.5rem; }
.quiz-result p { color: var(--text-muted); margin-bottom: 1rem; }
.quiz-restart { padding: 0.55rem 1.1rem; background: var(--surface2); color: var(--text); border: var(--border); border-radius: var(--radius-pill); font-family: var(--font); cursor: pointer; }
.quiz-restart:hover { background: var(--accent); color: var(--bg); border-color: var(--accent); }

.progress-chart { display: flex; flex-direction: column; gap: 0.65rem; }
.progress-row { display: flex; align-items: center; gap: 0.75rem; }
.progress-row label { flex: 0 0 110px; font-size: 0.85rem; }
.progress-bar-wrap { flex: 1; height: 8px; background: var(--surface2); border-radius: 4px; overflow: hidden; }
.progress-bar-fill { height: 100%; background: var(--accent); border-radius: 4px; transition: width .25s; }
.progress-row .pct { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-muted); width: 32px; text-align: right; }

.practical-list { display: flex; flex-direction: column; gap: 0.5rem; }
.practical-card {
  background: var(--surface);
  border: var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.practical-card.open { border-color: var(--accent-glow); }
.practical-card-header {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1rem;
  background: none;
  border: none;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  text-align: left;
  cursor: pointer;
  transition: background .15s;
}
.practical-card-header:hover { background: var(--surface2); }
.practical-card-title { flex: 1; font-weight: 600; }
.practical-card-module { font-size: 0.8rem; color: var(--text-muted); }
.practical-card-toggle { font-size: 0.7rem; color: var(--text-muted); transition: transform .2s; }
.practical-card.open .practical-card-toggle { transform: rotate(-180deg); }
.practical-card-body { padding: 0 1rem 1rem; }
.practical-card-body[hidden] { display: none; }
.practical-card-desc { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 0.5rem; line-height: 1.5; }
.practical-steps { margin: 0; padding-left: 1.1rem; font-size: 0.85rem; color: var(--text); line-height: 1.55; }
.practical-steps li { margin-bottom: 0.25rem; }

.compare-view { padding-bottom: 2rem; }
.compare-intro { color: var(--text-muted); margin-bottom: 1.5rem; font-size: 0.95rem; max-width: 720px; }
.compare-table-wrap { overflow-x: auto; margin-bottom: 2rem; }
.compare-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.compare-table th, .compare-table td { padding: 0.75rem 1rem; text-align: left; border-bottom: var(--border); vertical-align: top; }
.compare-table th { background: var(--surface2); color: var(--text-muted); font-weight: 600; }
.compare-table tbody tr:hover { background: rgba(255,255,255,.02); }
.compare-table td:first-child { min-width: 140px; color: var(--accent); }
.compare-takeaways { background: var(--surface); border: var(--border); border-radius: var(--radius); padding: 1.25rem 1.5rem; }
.compare-takeaways h3 { font-size: 1.1rem; margin-bottom: 0.75rem; color: var(--text); }
.compare-takeaways ul { margin: 0; padding-left: 1.25rem; color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; }
.compare-takeaways li { margin-bottom: 0.5rem; }

.view.presentation-view { display: none; }
.view.presentation-view.active {
  display: flex;
  flex-direction: column;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: linear-gradient(165deg, var(--bg) 0%, var(--bg-soft) 50%, var(--bg) 100%);
  padding: 0;
}
.presentation-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  background: rgba(10, 10, 14, 0.9);
  border-bottom: var(--border);
  backdrop-filter: blur(16px);
}
.presentation-back {
  margin-bottom: 0;
  padding: 0.4rem 0.65rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: color .2s, background .2s;
}
.presentation-back:hover { color: var(--accent); background: var(--accent-dim); }
.presentation-title { flex: 1; font-weight: 600; font-size: 0.95rem; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.presentation-counter {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  background: var(--surface2);
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  border: var(--border);
}
.slide-container { flex: 1; display: flex; align-items: center; justify-content: center; padding: 1.5rem 1.25rem; min-height: 0; }
.pdf-slide-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  min-height: 0;
  overflow: auto;
  background: var(--surface2);
}
.pdf-slide-container canvas {
  max-width: 100%;
  height: auto;
  box-shadow: var(--shadow);
  border-radius: var(--radius-sm);
}
@media (min-width: 1024px) { .slide-container { padding: 2rem 3rem; } }
.slide {
  width: 100%;
  max-width: 900px;
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr;
}
@media (min-width: 1024px) {
  .slide {
    max-width: 1100px;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr;
    gap: 2.5rem;
    align-items: center;
  }
  .slide.has-media .slide-media { grid-column: 1; grid-row: 1 / -1; min-height: 320px; }
  .slide.has-media .slide-body { grid-column: 2; grid-row: 1; }
  .slide:not(.has-media) .slide-body { grid-column: 1 / -1; max-width: 640px; margin: 0 auto; }
}
.slide-media {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface2);
  aspect-ratio: 16/9;
  width: 100%;
  box-shadow: var(--shadow);
  border: var(--border);
}
.slide-media:empty { display: none; }
.slide.has-media .slide-media { display: block; }
.slide-media iframe, .slide-media img { width: 100%; height: 100%; border: none; display: block; object-fit: cover; }
.slide-body { display: flex; flex-direction: column; justify-content: center; min-height: 0; }
.slide-heading {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.25;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}
@media (min-width: 768px) { .slide-heading { font-size: 1.75rem; margin-bottom: 1.5rem; } }
.slide-items { list-style: none; display: flex; flex-direction: column; gap: 0.65rem; }
.slide-items li {
  padding: 0.75rem 1rem;
  padding-left: 2rem;
  background: var(--surface);
  border: var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text);
  position: relative;
}
.slide-items li::before {
  content: '';
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}
.presentation-progress { height: 6px; background: var(--surface2); flex-shrink: 0; }
.presentation-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  width: 0%;
  transition: width .35s ease;
}
.presentation-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  padding: 1rem 1.25rem;
  background: rgba(10, 10, 14, 0.9);
  border-top: var(--border);
  backdrop-filter: blur(8px);
}
.slide-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s, border-color .2s, transform .1s;
}
.slide-btn:hover { background: var(--accent-dim); border-color: var(--accent); transform: scale(1.05); }
.slide-btn:disabled { opacity: .35; cursor: not-allowed; transform: none; }
.slide-dots { display: flex; gap: 0.4rem; flex-wrap: wrap; justify-content: center; }
.slide-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--surface2);
  cursor: pointer;
  transition: background .2s, transform .2s;
}
.slide-dot.active { background: var(--accent); transform: scale(1.25); }
.slide-dot:hover:not(.active) { background: var(--text-muted); }
.keyboard-hint { font-size: 0.75rem; color: var(--text-muted); margin-left: 0.5rem; }
@media (max-width: 600px) { .keyboard-hint { display: none; } }

@media (max-width: 600px) {
  .header { flex-wrap: wrap; }
  .nav { order: 3; width: 100%; }
  .progress-pill { margin-left: auto; }
  .hero h1 { font-size: 1.9rem; }
}

/* Öğretmen — haftalık ders takvimi */
.schedule-cal-wrap {
  margin-bottom: 1.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.schedule-cal-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  margin-bottom: 0.75rem;
}
.schedule-cal-week-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  flex: 1;
  min-width: 140px;
  text-align: center;
}
.schedule-cal-legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}
.schedule-legend-i {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  margin-right: 0.25rem;
  vertical-align: middle;
}
.schedule-cal-grid {
  display: grid;
  grid-template-columns: 44px repeat(7, minmax(88px, 1fr));
  grid-template-rows: auto 640px;
  gap: 0 3px;
  min-width: 700px;
  border: var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 8px 8px 10px;
}
.schedule-cal-corner { grid-column: 1; grid-row: 1; }
.schedule-cal-head {
  text-align: center;
  padding: 4px 2px 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.schedule-cal-head-dow {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
}
.schedule-cal-head-date {
  font-size: 0.72rem;
  color: var(--text-muted);
}
.schedule-cal-times {
  display: flex;
  flex-direction: column;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  padding-right: 4px;
}
.schedule-cal-time-slot {
  flex: 1;
  font-size: 0.68rem;
  color: var(--text-muted);
  line-height: 1;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 2px;
}
.schedule-cal-day-col {
  position: relative;
  background: repeating-linear-gradient(
    to bottom,
    transparent,
    transparent calc(50% - 1px),
    rgba(255, 255, 255, 0.04) calc(50% - 1px),
    rgba(255, 255, 255, 0.04) 50%
  );
  background-size: 100% calc(640px / 30);
  border-left: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
}
.schedule-cal-slot-bg {
  position: absolute;
  left: 0;
  right: 0;
  opacity: 0.58;
  z-index: 0;
}
.schedule-cal-slot-bg--free { background: rgba(80, 180, 120, 0.11); }
.schedule-cal-slot-bg--blocked { background: rgba(150, 150, 160, 0.2); }
.schedule-cal-slot-bg--busy { background: rgba(230, 160, 90, 0.16); }
.schedule-cal-slot-bg--mine { background: rgba(56, 232, 255, 0.14); }
.schedule-cal-event {
  position: absolute;
  left: 3px;
  right: 3px;
  border-radius: 6px;
  border: 1px solid;
  padding: 4px 6px;
  overflow: hidden;
  font-size: 0.68rem;
  line-height: 1.25;
  z-index: 2;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.2);
  cursor: default;
}
.schedule-cal-event-time {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  opacity: 0.95;
  margin-bottom: 2px;
}
.schedule-cal-event-name {
  font-weight: 600;
  font-size: 0.72rem;
}
.schedule-cal-event-topic {
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: 2px;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}