/* === UTAP Courses Deck — Dark Theme === */

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg-primary: #0b1220;
  --bg-secondary: #111b2e;
  --bg-card: #162338;
  --bg-card-hover: #1a2a42;
  --text-primary: #ffffff;
  --text-secondary: #a3b3c9;
  --text-muted: #6a7a90;
  --accent-red: #e63946;
  --accent-gold: #d4a400;
  --accent-cyan: #0b8da1;
  --accent-blue: #4a7fc1;
  --border-color: rgba(255,255,255,0.08);
  --gradient-dark: linear-gradient(145deg, #0b1220, #162338);
  --gradient-card: linear-gradient(135deg, #162338, #1a2a42);
  --gradient-red: linear-gradient(135deg, #c0392b, #e63946);
  --gradient-gold: linear-gradient(135deg, #775b00, #d4a400);
  --gradient-cyan: linear-gradient(135deg, #063568, #0b8da1);
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

/* === Deck Container === */
.deck {
  width: 100vw;
  height: 100vh;
  position: relative;
  overflow: hidden;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3vh 5vw;
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  pointer-events: none;
  background: var(--bg-primary);
}

.slide.active {
  opacity: 1;
  transform: translateX(0);
  pointer-events: auto;
}

/* === Navigation Bar === */
.nav-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  background: rgba(11,18,32,0.95);
  border-top: 1px solid var(--border-color);
  z-index: 100;
  backdrop-filter: blur(10px);
}

.nav-bar .nav-left,
.nav-bar .nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 6px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
}

.nav-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-cyan);
}

.nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.page-indicator {
  font-size: 13px;
  color: var(--text-secondary);
  min-width: 60px;
  text-align: center;
}

.lang-toggle {
  background: var(--bg-card);
  border: 1px solid var(--accent-gold);
  color: var(--accent-gold);
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.2s;
}

.lang-toggle:hover {
  background: var(--accent-gold);
  color: var(--bg-primary);
}

/* === Progress Bar === */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-red), var(--accent-gold));
  transition: width 0.4s ease;
  z-index: 101;
}

/* === Typography === */
.slide-title {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 700;
  margin-bottom: 1vh;
  text-align: center;
}

.slide-subtitle {
  font-size: clamp(16px, 2vw, 24px);
  color: var(--text-secondary);
  margin-bottom: 3vh;
  text-align: center;
}

.slide-section-label {
  font-size: 14px;
  color: var(--accent-gold);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 1vh;
}

/* === Cover Slide === */
.slide-cover {
  background: radial-gradient(ellipse at center, #162338 0%, #0b1220 70%);
}

.cover-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(212,164,0,0.15);
  border: 1px solid var(--accent-gold);
  border-radius: 20px;
  padding: 8px 20px;
  font-size: 14px;
  color: var(--accent-gold);
  margin-bottom: 3vh;
}

.cover-title {
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 800;
  text-align: center;
  line-height: 1.2;
  margin-bottom: 2vh;
}

.cover-subtitle {
  font-size: clamp(18px, 2.5vw, 32px);
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 4vh;
}

.cover-courses {
  display: flex;
  gap: 2vw;
  flex-wrap: wrap;
  justify-content: center;
}

.cover-course-tag {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 10px 24px;
  font-size: 15px;
  color: var(--text-secondary);
  transition: all 0.3s;
}

.cover-course-tag:hover {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
}

.cover-hint {
  position: absolute;
  bottom: 70px;
  font-size: 13px;
  color: var(--text-muted);
}

/* === Poster Slide === */
.slide-poster {
  display: flex;
  align-items: center;
  justify-content: center;
}

.poster-container {
  max-width: 90%;
  max-height: 75vh;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px var(--border-color);
}

.poster-container img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 75vh;
  object-fit: contain;
}

/* === Content Slide === */
.slide-content {
  justify-content: flex-start;
  padding-top: 8vh;
}

.content-header {
  width: 100%;
  max-width: 900px;
  margin-bottom: 3vh;
}

.content-course-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--accent-gold);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 1vh;
}

.content-title {
  font-size: clamp(24px, 3.5vw, 40px);
  font-weight: 700;
  margin-bottom: 1vh;
}

.content-meta {
  display: flex;
  gap: 2vw;
  flex-wrap: wrap;
  margin-bottom: 2vh;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-secondary);
}

.meta-item .meta-icon {
  font-size: 16px;
}

.meta-highlight {
  color: var(--accent-gold);
  font-weight: 600;
}

/* Module Cards */
.modules-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2vh 2vw;
  width: 100%;
  max-width: 900px;
}

.module-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.5vh 2vw;
  transition: all 0.3s;
}

.module-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

.module-number {
  font-size: 12px;
  color: var(--accent-cyan);
  font-weight: 700;
  margin-bottom: 0.5vh;
}

.module-title {
  font-size: clamp(16px, 1.8vw, 22px);
  font-weight: 600;
  margin-bottom: 1vh;
}

.module-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Price/Subsidy Box */
.price-box {
  display: flex;
  gap: 2vw;
  width: 100%;
  max-width: 900px;
  margin-top: 2vh;
}

.price-card {
  flex: 1;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2vh 2vw;
  text-align: center;
}

.price-card.subsidy {
  border-color: var(--accent-gold);
}

.price-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5vh;
}

.price-value {
  font-size: clamp(20px, 2.5vw, 32px);
  font-weight: 700;
  color: var(--text-primary);
}

.price-detail {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 0.5vh;
}

.price-card.subsidy .price-value {
  color: var(--accent-gold);
}

/* === Flow / Process Slide === */
.slide-flow {
  justify-content: flex-start;
  padding-top: 8vh;
}

.flow-container {
  width: 100%;
  max-width: 900px;
}

.flow-steps {
  display: flex;
  flex-direction: column;
  gap: 2vh;
}

.flow-step {
  display: flex;
  align-items: flex-start;
  gap: 1.5vw;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2vh 2vw;
  transition: all 0.3s;
}

.flow-step:hover {
  border-color: var(--accent-cyan);
}

.flow-step-number {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  background: var(--gradient-cyan);
  color: #fff;
}

.flow-step-content {
  flex: 1;
}

.flow-step-title {
  font-size: clamp(16px, 1.8vw, 22px);
  font-weight: 600;
  margin-bottom: 0.5vh;
}

.flow-step-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.flow-step-detail {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 0.5vh;
  padding-left: 12px;
  border-left: 2px solid var(--accent-gold);
}

/* === UTAP Subsidy Amount Slide === */
.subsidy-table {
  width: 100%;
  max-width: 800px;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.subsidy-table th,
.subsidy-table td {
  padding: 2vh 2vw;
  text-align: center;
  font-size: 15px;
}

.subsidy-table th {
  background: var(--bg-card);
  color: var(--accent-gold);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 1px;
}

.subsidy-table td {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-top: 1px solid var(--border-color);
}

.subsidy-table .subsidy-amount {
  color: var(--accent-gold);
  font-weight: 700;
  font-size: 18px;
}

/* === End Slide === */
.slide-end {
  background: radial-gradient(ellipse at center, #162338 0%, #0b1220 70%);
}

.end-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 800;
  text-align: center;
  margin-bottom: 2vh;
}

.end-contact {
  display: flex;
  gap: 3vw;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 4vh;
}

.end-contact-item {
  text-align: center;
}

.end-contact-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5vh;
}

.end-contact-value {
  font-size: clamp(16px, 2vw, 24px);
  color: var(--accent-cyan);
  font-weight: 600;
}

/* === Language Visibility === */
[data-en] { display: none; }
body.lang-en [data-zh] { display: none; }
body.lang-en [data-en] { display: inline; }

body.lang-en .slide-section-label[data-zh],
body.lang-en .content-course-tag[data-zh],
body.lang-en .cover-hint[data-zh] { display: none; }
body.lang-en .slide-section-label[data-en],
body.lang-en .content-course-tag[data-en],
body.lang-en .cover-hint[data-en] { display: block; }

/* === Responsive === */
@media (max-width: 768px) {
  .modules-grid {
    grid-template-columns: 1fr;
  }
  .price-box {
    flex-direction: column;
  }
  .cover-courses {
    flex-direction: column;
    gap: 1vh;
  }
}