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

:root {
  --sidebar-w: 260px;
  --red: #c41e3a;
  --red-dark: #8b1528;
  --sidebar-bg: #1a1614;
  --sidebar-text: #e8e0d8;
  --sidebar-muted: #9a9088;
  --paper: #ece4d4;
  --paper-warm: #e6dcc8;
  --paper-dark: #ddd2bc;
  --paper-fiber: #c9b99a;
  --ink: #2c2416;
  --ink-muted: #6b5f52;
  --border: #c9b99a;
  --shadow: 0 2px 14px rgba(44, 36, 22, 0.1);
  --radius: 6px;
  --deco-opacity: 1;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background-color: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  min-height: 100vh;
}

/* Washi — vrstvená papierová textúra */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='f'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.04 0.08' numOctaves='5' seed='2'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23f)' opacity='0.35'/%3E%3C/svg%3E"),
    url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23b8a88a' fill-opacity='0.07'%3E%3Cpath d='M0 0h1v80H0zM20 0h1v80H20zM40 0h1v80H40zM60 0h1v80H60zM0 0h80v1H0zM0 20h80v1H0zM0 40h80v1H0zM0 60h80v1H0z'/%3E%3C/g%3E%3C/svg%3E"),
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23a89878' fill-opacity='0.12'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/svg%3E");
  background-size: 200px 200px, 80px 80px, 60px 60px;
  pointer-events: none;
  z-index: 0;
  opacity: 0.85;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 120% 80% at 50% 0%, rgba(255,248,235,0.4) 0%, transparent 55%),
    radial-gradient(ellipse 80% 60% at 80% 100%, rgba(180,160,130,0.08) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.deco-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  overflow: hidden;
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  z-index: 100;
  border-right: 3px solid var(--red);
}

.sidebar-brand {
  padding: 1.75rem 1.25rem 1.25rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  text-align: center;
}

.sidebar-brand .kanji {
  font-family: 'Noto Serif JP', serif;
  font-size: 2.75rem;
  color: var(--red);
  line-height: 1;
  letter-spacing: 0.05em;
}

.sidebar-brand h1 {
  font-family: 'Noto Serif JP', serif;
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--sidebar-muted);
  margin-top: 0.5rem;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem 0;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.6rem 1.25rem;
  color: var(--sidebar-muted);
  text-decoration: none;
  font-size: 0.82rem;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  color: var(--sidebar-text);
  background: rgba(196, 30, 58, 0.12);
  border-left-color: var(--red);
}

.sidebar-nav .nav-num {
  font-family: 'Noto Serif JP', serif;
  font-size: 0.7rem;
  color: var(--red);
  min-width: 1.5rem;
  font-weight: 700;
}

.sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.back-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--sidebar-muted);
  text-decoration: none;
  font-size: 0.8rem;
  transition: color 0.2s;
}

.back-link:hover { color: var(--red); }

.main {
  margin-left: var(--sidebar-w);
  position: relative;
  z-index: 10;
  min-height: 100vh;
  background-color: transparent;
}

.main-header {
  padding: 2.5rem 2.5rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: rgba(236, 228, 212, 0.88);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 1px 0 rgba(180, 160, 130, 0.2);
}

.main-header h2 {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.5rem;
  letter-spacing: 0.08em;
  color: var(--ink);
}

.main-header p {
  color: var(--ink-muted);
  font-size: 0.9rem;
  margin-top: 0.35rem;
}

.sections-wrap {
  padding: 2rem 2.5rem 4rem;
  max-width: 1100px;
}

.dojo-section {
  margin-bottom: 3rem;
  scroll-margin-top: 5rem;
}

.section-head {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--border);
}

.stamp {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--red);
  color: #fff;
  font-family: 'Noto Serif JP', serif;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(196, 30, 58, 0.35);
  border: 2px solid var(--red-dark);
}

.section-head-text h3 {
  font-family: 'Noto Serif JP', serif;
  font-size: 1.35rem;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.section-head-text .subtitle {
  font-size: 0.85rem;
  color: var(--ink-muted);
  font-style: italic;
}

.section-desc {
  color: var(--ink-muted);
  font-size: 0.92rem;
  margin-bottom: 1.25rem;
  line-height: 1.7;
}

.info-grid { display: grid; gap: 0.6rem; margin-bottom: 1.25rem; }

.info-block {
  display: flex;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: rgba(221, 210, 188, 0.45);
  border-left: 3px solid var(--red);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.88rem;
  box-shadow: inset 0 1px 2px rgba(44, 36, 22, 0.04);
}

.info-block .belt {
  font-weight: 600;
  color: var(--red);
  white-space: nowrap;
  min-width: 5rem;
}

.links-block { margin-bottom: 1.25rem; }

.links-block h4,
.subsection-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-muted);
  margin-bottom: 0.5rem;
}

.links-block a {
  display: inline-block;
  color: var(--red);
  text-decoration: none;
  font-size: 0.88rem;
  margin-right: 1.25rem;
  margin-bottom: 0.35rem;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

.links-block a:hover { border-bottom-color: var(--red); }

.notes-block {
  font-size: 0.82rem;
  color: var(--ink-muted);
  font-style: italic;
  margin-bottom: 1rem;
}

.subsection { margin-bottom: 1.5rem; }

.subsection-title {
  font-family: 'Noto Serif JP', serif;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  color: var(--ink);
  margin-bottom: 0.75rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px dashed var(--border);
}

.exercise-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.65rem;
}

@media (max-width: 900px) {
  .exercise-grid { grid-template-columns: 1fr; }
}

.exercise-card {
  background: rgba(248, 242, 230, 0.92);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.35);
  overflow: hidden;
  transition: box-shadow 0.2s;
}

.exercise-card.open {
  box-shadow: 0 4px 20px rgba(44, 36, 22, 0.12);
  border-color: var(--red);
}

.exercise-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: var(--ink);
  transition: background 0.15s;
}

.exercise-toggle:hover { background: var(--paper-dark); }

.exercise-num {
  font-family: 'Noto Serif JP', serif;
  font-weight: 700;
  color: var(--red);
  font-size: 0.85rem;
  min-width: 1.75rem;
}

.exercise-name { flex: 1; font-size: 0.85rem; line-height: 1.4; }

.exercise-reps {
  font-size: 0.75rem;
  color: var(--ink-muted);
  white-space: nowrap;
}

.exercise-chevron {
  color: var(--ink-muted);
  font-size: 0.7rem;
  transition: transform 0.2s;
}

.exercise-card.open .exercise-chevron { transform: rotate(180deg); }

.exercise-body {
  display: none;
  padding: 0 1rem 1rem;
  border-top: 1px solid var(--border);
  background: var(--paper);
}

.exercise-card.open .exercise-body { display: block; }

.kudo-media { margin-top: 0.75rem; display: grid; gap: 0.75rem; }

.kudo-media-field label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  margin-bottom: 0.3rem;
}

.kudo-media-field input[type="file"],
.kudo-media-field input[type="text"],
.kudo-media-field input[type="url"] {
  width: 100%;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.8rem;
  background: #fff;
  font-family: inherit;
}

.kudo-preview { margin-top: 0.5rem; }

.kudo-preview img {
  max-width: 100%;
  border-radius: 4px;
  border: 1px solid var(--border);
}

.kudo-preview iframe,
.kudo-preview video {
  width: 100%;
  aspect-ratio: 16/9;
  border: none;
  border-radius: 4px;
}

.kudo-points h3 {
  font-family: 'Noto Serif JP', serif;
  font-size: 1rem;
  margin-bottom: 0.75rem;
  color: var(--ink);
}

.kudo-table-wrap { overflow-x: auto; margin-bottom: 1rem; }

.kudo-table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  background: rgba(248, 242, 230, 0.85);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.kudo-table-wrap th,
.kudo-table-wrap td {
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  text-align: center;
}

.kudo-table-wrap th {
  background: var(--paper-dark);
  font-weight: 600;
  color: var(--ink);
}

.kudo-info {
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  padding: 0.6rem 0.85rem;
  background: var(--paper-dark);
  border-radius: var(--radius);
}

.kudo-links a { color: var(--red); margin-right: 1rem; font-size: 0.85rem; }

.page-footer {
  text-align: center;
  padding: 2rem;
  color: var(--ink-muted);
  font-size: 0.75rem;
  border-top: 1px solid var(--border);
}

@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .main { margin-left: 0; }
  .deco-layer { display: none; }
}