/* Chenyo 英文課 — 小悠設計 💕 */

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

body {
  background: #0d1b2a;
  color: #fff;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Wrap */
.lesson-wrap, .lesson-list-wrap {
  width: 100%;
  max-width: 800px;
}

/* Header */
.lesson-header {
  position: relative;
  text-align: center;
  padding: 16px 20px 8px;
}
.main-title {
  font-size: 28px;
  font-weight: 800;
  color: #f0c040;
  margin-bottom: 8px;
  letter-spacing: 1px;
}
.sub-title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.lesson-num-badge {
  background: #1a4a7a;
  color: #7ab5f0;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 20px;
}
.lesson-title-text {
  font-size: 18px;
  font-weight: 700;
  color: #b0d0f0;
}
.lesson-title-zh {
  font-size: 14px;
  color: #5a7a9a;
}
.page-display {
  font-size: 13px;
  color: #4a7a9a;
}
.page-num { font-weight: 700; color: #7ab5f0; }

/* Cover image */
.cover-image {
  padding: 8px 20px;
}
.cover-image img {
  width: 100%;
  border-radius: 12px;
  border: 1px solid #1a3a5a;
}

/* Slides */
.slides-wrapper {
  padding: 0;
}
.slide { padding: 16px 36px 12px; }

.cn-top-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 6px;
}
.cn-top {
  font-size: 26px;
  font-weight: 800;
  color: #fff;
  text-align: center;
}

.en-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 10px;
}
.en-text {
  font-size: 18px;
  font-weight: 500;
  color: #fff;
  text-align: center;
  letter-spacing: 0.5px;
}

.seg-row {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 2px;
  flex-wrap: wrap;
}
.seg-pair {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1px;
}

/* Colors */
.c1  { background: #e74c6a; }
.c2  { background: #f0a500; color: #0d1b2a !important; }
.c3  { background: #3498db; }
.c4  { background: #1abc9c; }
.c5  { background: #e056fd; }
.c6  { background: #ff6b6b; }
.c7  { background: #0abde3; }
.c8  { background: #f9ca24; color: #0d1b2a !important; }
.c9  { background: #6ab04c; }
.c10 { background: #f19066; }
.c11 { background: #596275; }
.c12 { background: #d63031; }
.c13 { background: #00b894; }
.c14 { background: #0984e3; }
.c15 { background: #e84393; }
.c16 { background: #fdcb6e; color: #0d1b2a !important; }

.seg-en {
  padding: 4px 10px;
  border-radius: 7px;
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}
.seg-en:hover {
  transform: scale(1.1);
  box-shadow: 0 2px 10px rgba(255,255,255,0.2);
}
.seg-en:active { transform: scale(0.95); }

.seg-zh {
  padding: 4px 10px;
  border-radius: 7px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
}

.divider {
  color: #3a5a7a;
  font-size: 16px;
  padding: 20px 4px 0;
  align-self: flex-start;
}

/* Play buttons */
.play-btn {
  background: #1a4a7a;
  color: #fff;
  border: 1px solid #2a6aaa;
  padding: 6px 16px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 6px;
}
.play-btn:hover { background: #2a6aaa; transform: scale(1.05); }
.play-btn:active { background: #f0a500; color: #0d1b2a; }

/* Footer / Dots */
footer {
  padding: 12px 20px 24px;
}
.dots-wrapper {
  display: flex;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
}
.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #1a3a5a;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s;
}
.dot.active { background: #f0a500; transform: scale(1.3); }
.dot:hover { background: #3a6a8a; }

/* Nav buttons */
.nav-btn {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(26, 74, 122, 0.7);
  color: #fff;
  border: 1px solid #2a6aaa;
  font-size: 24px;
  padding: 14px 10px;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.2s;
  z-index: 100;
}
.nav-btn:disabled { opacity: 0.3; cursor: default; }
.nav-btn:hover:not(:disabled) { background: #2a6aaa; }
#prevBtn { left: 8px; }
#nextBtn { right: 8px; }