/* ===== slides-common.css ===== */
/* Minimal, intellectual presentation framework */

/* ---------- Reset & Base ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

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

:root {
  --bg: #ffffff;
  --bg-subtle: #f8f9fa;
  --bg-muted: #f1f3f5;
  --text: #1a1a2e;
  --text-secondary: #495057;
  --text-muted: #868e96;
  --border: #e9ecef;
  --border-dark: #dee2e6;

  --accent: #0f4c81;
  --accent-light: #ffffff;
  --accent-dark: #1d4ed8;

  --slate: #f8fafc;
  --slate-border: #e2e8f0;

  --green: #e8f5e9;
  --green-text: #1b5e20;
  --green-border: #a5d6a7;

  --blue: #e3f2fd;
  --blue-text: #1565c0;
  --blue-border: #90caf9;

  --purple: #f3e5f5;
  --purple-text: #6a1b9a;
  --purple-border: #ce93d8;

  --amber: #fff8e1;
  --amber-text: #e65100;
  --amber-border: #ffcc80;

  --rose: #fce4ec;
  --rose-text: #b71c1c;
  --rose-border: #ef9a9a;

  --cyan: #e0f7fa;
  --cyan-text: #00695c;
  --cyan-border: #80cbc4;

  --slide-max-w: 880px;
  --nav-h: 52px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Slide Container ---------- */
.slides-wrapper {
  position: relative;
  width: 100vw;
  height: calc(100vh - var(--nav-h));
  overflow: hidden;
}

.slide {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 56px 40px 32px;
  overflow-y: auto;
  max-width: var(--slide-max-w);
  margin: 0 auto;
  left: 0;
  right: 0;
  opacity: 0;
  transition: opacity .3s ease;
}

.slide.active {
  display: flex;
  opacity: 1;
}

/* ---------- Big Slide Number ---------- */
.big-number {
  position: absolute;
  top: 16px;
  right: 28px;
  font-size: 4.5rem;
  font-weight: 800;
  color: var(--accent);
  opacity: .08;
  letter-spacing: -.04em;
  font-variant-numeric: tabular-nums;
  pointer-events: none;
  line-height: 1;
  z-index: 0;
}

/* ---------- Typography ---------- */
.slide-title {
  font-weight: 700;
  font-size: 2rem;
  color: var(--text);
  text-align: center;
  margin-bottom: 8px;
  line-height: 1.3;
  letter-spacing: -.02em;
}

/* Highlight span inside titles */
.slide-title .highlight {
  color: var(--accent);
  position: relative;
}

.slide-title .highlight::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 6px;
  background: var(--accent-light);
  border-radius: 2px;
  z-index: -1;
}

.slide-subtitle {
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 32px;
  max-width: 640px;
  line-height: 1.6;
}

.section-label {
  display: inline-block;
  background: var(--text);
  color: #fff;
  font-size: .65rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 4px;
  margin-bottom: 16px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

/* ---------- Cards ---------- */
.card-row {
  display: flex;
  gap: 16px;
  width: 100%;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 20px;
}

.card {
  flex: 1 1 260px;
  max-width: 420px;
  border: 2px solid var(--border-dark);
  border-radius: 10px;
  padding: 24px;
  position: relative;
  background: var(--bg-subtle);
  box-shadow: 0 2px 8px rgba(0, 0, 0, .06);
  transition: border-color .2s, box-shadow .2s;
}

.card:hover {
  box-shadow: 0 6px 20px rgba(0, 0, 0, .1);
}

/* Color variants — tinted backgrounds with left accent */
.card.pink {
  background: var(--rose);
  border-color: var(--rose-border);
  border-left: 5px solid var(--rose-text);
}

.card.blue {
  background: var(--blue);
  border-color: var(--blue-border);
  border-left: 5px solid var(--blue-text);
}

.card.green {
  background: var(--green);
  border-color: var(--green-border);
  border-left: 5px solid var(--green-text);
}

.card.yellow {
  background: var(--amber);
  border-color: var(--amber-border);
  border-left: 5px solid var(--amber-text);
}

.card.orange {
  background: var(--amber);
  border-color: var(--amber-border);
  border-left: 5px solid var(--amber-text);
}

.card.purple {
  background: var(--purple);
  border-color: var(--purple-border);
  border-left: 5px solid var(--purple-text);
}

.card-title {
  font-weight: 600;
  font-size: .95rem;
  margin-bottom: 12px;
  color: var(--text);
  letter-spacing: -.01em;
}

.card-body {
  font-size: .88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.card-body li {
  list-style: none;
  padding-left: 1.2em;
  position: relative;
  margin-bottom: 5px;
}

.card-body li::before {
  content: '\2022';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* ---------- Marker / Highlight Text ---------- */
.marker-text {
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
  font-size: .85rem;
}

.marker-text.red {
  background: var(--rose);
  color: var(--rose-text);
}

.marker-text.blue {
  background: var(--blue);
  color: var(--blue-text);
}

.marker-text.green {
  background: var(--green);
  color: var(--green-text);
}

.marker-text.orange {
  background: var(--amber);
  color: var(--amber-text);
}

.marker-text.purple {
  background: var(--purple);
  color: var(--purple-text);
}

/* ---------- Stats Row ---------- */
.stats-row {
  display: flex;
  gap: 32px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.stat-item {
  text-align: center;
  min-width: 80px;
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: .75rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}

/* ---------- Compare Table ---------- */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
  font-size: .88rem;
}

.compare-table th {
  background: var(--text);
  color: #fff;
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  font-size: .8rem;
  letter-spacing: .03em;
  text-transform: uppercase;
}

.compare-table th:first-child {
  border-radius: 6px 0 0 0;
}

.compare-table th:last-child {
  border-radius: 0 6px 0 0;
}

.compare-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-secondary);
}

.compare-table tr:last-child td {
  border-bottom: none;
}

.compare-table tr:last-child td:first-child {
  border-radius: 0 0 0 6px;
}

.compare-table tr:last-child td:last-child {
  border-radius: 0 0 6px 0;
}

.compare-table tbody tr:hover td {
  background: var(--bg-subtle);
}

/* ---------- Flow Diagram ---------- */
.flow-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.flow-step {
  background: var(--blue);
  border: 2px solid var(--blue-border);
  border-radius: 8px;
  padding: 10px 20px;
  font-weight: 600;
  font-size: .85rem;
  text-align: center;
  color: var(--blue-text);
  box-shadow: 0 2px 6px rgba(0, 0, 0, .05);
}

.flow-arrow {
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 600;
}

/* ---------- Checklist ---------- */
.checklist li {
  list-style: none;
  position: relative;
  padding-left: 1.6em;
  margin-bottom: 8px;
  font-size: .9rem;
  color: var(--text-secondary);
}

.checklist li::before {
  content: '';
  position: absolute;
  left: 0;
  top: .45em;
  width: 14px;
  height: 14px;
  border: 2px solid var(--accent);
  border-radius: 3px;
}

/* ---------- Tags ---------- */
.tag {
  display: inline-block;
  font-size: .7rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 4px;
  margin: 2px 3px;
  letter-spacing: .02em;
}

.tag.pink {
  background: var(--rose);
  color: var(--rose-text);
}

.tag.blue {
  background: var(--blue);
  color: var(--blue-text);
}

.tag.green {
  background: var(--green);
  color: var(--green-text);
}

.tag.orange {
  background: var(--amber);
  color: var(--amber-text);
}

.tag.purple {
  background: var(--purple);
  color: var(--purple-text);
}

/* ---------- Decorative (hidden in professional mode) ---------- */
.sparkle,
.doodle-arrow {
  display: none;
}

/* ---------- Progress Bar ---------- */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--accent);
  transition: width .3s ease;
  z-index: 999;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
  z-index: 100;
}

.nav-btn {
  background: none;
  border: 1px solid var(--border-dark);
  color: var(--text-secondary);
  padding: 6px 20px;
  border-radius: 6px;
  font-weight: 500;
  font-size: .82rem;
  cursor: pointer;
  transition: all .15s;
  font-family: inherit;
}

.nav-btn:hover {
  background: var(--text);
  border-color: var(--text);
  color: #fff;
}

.nav-btn.contents {
  font-size: .75rem;
  padding: 5px 14px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-right: 4px;
}

.nav-dots {
  display: flex;
  gap: 6px;
}

.nav-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-dark);
  cursor: pointer;
  transition: background .2s, transform .2s;
}

.nav-dot.active {
  background: var(--accent);
  transform: scale(1.3);
}

.page-num {
  font-size: .78rem;
  font-weight: 500;
  color: var(--text-muted);
  min-width: 54px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .slide {
    padding: 32px 20px 20px;
  }

  .slide-title {
    font-size: 1.5rem;
  }

  .slide-subtitle {
    font-size: .95rem;
  }

  .card {
    flex: 1 1 100%;
    max-width: 100%;
  }

  .card-row {
    flex-direction: column;
  }

  .stats-row {
    gap: 16px;
  }

  .stat-value {
    font-size: 1.4rem;
  }

  .flow-row {
    flex-direction: column;
    gap: 4px;
  }

  .flow-arrow {
    transform: rotate(90deg);
  }
}

@media (max-width: 480px) {
  .slide {
    padding: 24px 14px 14px;
  }

  .slide-title {
    font-size: 1.25rem;
  }

  .nav-btn {
    padding: 5px 14px;
    font-size: .78rem;
  }
}

/* ---------- Landing Page (index) ---------- */
.landing-body {
  overflow-y: auto;
  background: var(--bg);
}

.landing-header {
  text-align: center;
  padding: 20px 24px 20px;
}

.landing-header h1 {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -.03em;
}

.landing-header p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin: 0 auto;
  font-weight: 400;
}

.week-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 20px;
  max-width: 2000px;
  margin: 0px auto;
  padding: 0 24px 80px;
}

.week-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px;
  background: var(--bg);
  transition: border-color .2s, box-shadow .2s;
  text-decoration: none;
  color: inherit;
  display: block;
}

.week-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(37, 99, 235, .08);
}

.week-card .week-num {
  font-size: .65rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-light);
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.week-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
  letter-spacing: -.01em;
  color: var(--text);
}

.week-card .desc {
  font-size: .87rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
  line-height: 1.55;
}

.week-card .meta {
  font-size: .73rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: .02em;
}

.landing-footer {
  text-align: center;
  padding: 28px;
  font-size: .78rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}