/* ─── tokens ─── */
:root {
  --color-bg: #c6d3e0;
  --color-bg-warm: #d4cec6;
  --color-bg-muted: #dbe5ee;
  --color-surface: #e8e2da;
  --color-surface-glass: rgba(232, 226, 218, 0.65);
  --color-border: rgba(142, 126, 114, 0.25);
  --color-border-strong: rgba(111, 88, 67, 0.4);
  --color-text: #3d2e23;
  --color-text-muted: #6f5843;
  --color-text-soft: #8a725d;
  --color-action: #c66240;
  --color-action-hover: #b55636;
  --color-action-glow: rgba(198, 98, 64, 0.25);
  --color-action-soft: #efe2d8;
  --color-white: #fffdfa;
  --color-cream: #f5f0ea;
  --color-sand-light: rgba(138, 114, 93, 0.08);

  --shadow-soft: 0 1px 3px rgba(61, 46, 35, 0.06), 0 6px 16px rgba(61, 46, 35, 0.06);
  --shadow-lifted: 0 2px 6px rgba(61, 46, 35, 0.08), 0 12px 32px rgba(61, 46, 35, 0.1);
  --shadow-glow: 0 0 0 1px var(--color-action-glow), 0 4px 20px var(--color-action-glow);

  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --font-display: "Comfortaa", cursive;
  --font-body: "Manrope", sans-serif;

  --layout-width: 1140px;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ─── reset ─── */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  height: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

img {
  display: block;
  max-width: 100%;
}

/* ─── layout shell ─── */
.site-shell {
  width: min(100%, var(--layout-width));
  margin: 0 auto;
  padding: 0 28px 40px;
}

/* ─── topbar ─── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  padding: 14px 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  text-decoration: none;
  transition: transform 200ms var(--ease-spring);
}

.brand:hover {
  transform: scale(1.03);
}

.brand-kicker {
  display: none;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-action);
}

.topnav {
  display: flex;
  gap: 6px;
  align-items: center;
}

.topnav a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: all 180ms ease;
}

.topnav a:hover,
.topnav a:focus-visible {
  color: var(--color-text);
  background: var(--color-sand-light);
}

.brand.is-active .brand-title {
  color: var(--color-action);
}

.topnav a.is-active {
  color: var(--color-text);
  font-weight: 700;
  background: var(--color-sand-light);
}

/* ─── app shell ─── */
.app-shell {
  min-height: calc(100vh - 68px);
}

.view {
  padding-top: 28px;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ─── buttons ─── */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1.5px solid transparent;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.01em;
  transition: all 200ms var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}

.button-primary {
  background: var(--color-action);
  border-color: var(--color-action);
  color: var(--color-white);
  box-shadow: 0 2px 8px var(--color-action-glow);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--color-action-hover);
  border-color: var(--color-action-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.button-primary:active {
  transform: translateY(0);
  box-shadow: 0 1px 4px var(--color-action-glow);
}

.button-secondary {
  background: var(--color-surface-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-color: var(--color-border);
  color: var(--color-text);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: var(--color-border-strong);
  background: rgba(232, 226, 218, 0.85);
  transform: translateY(-1px);
  box-shadow: var(--shadow-soft);
}

.button-secondary:active {
  transform: translateY(0);
}

.button[disabled] {
  opacity: 0.4;
  cursor: default;
  pointer-events: none;
}

/* ─── homepage hero ─── */
.home-hero {
  min-height: calc(100vh - 88px);
  padding: 0;
  background: var(--color-bg) url("intro-recolored.gif") center center / cover no-repeat;
  border-radius: 0;
  position: relative;
}

.home-overlay {
  min-height: calc(100vh - 88px);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 24px 0 48px;
  position: relative;
  z-index: 1;
}

.home-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  animation: fadeUp 700ms 200ms var(--ease-out-expo) both;
}

.home-start {
  min-width: 240px;
  min-height: 56px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.03em;
  border-radius: var(--radius-xl);
  color: var(--color-white);
  background: var(--color-action);
  border-color: var(--color-action);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
}

.home-start:hover {
  background: var(--color-action-hover);
  border-color: var(--color-action-hover);
  box-shadow: 0 6px 32px rgba(0, 0, 0, 0.2);
}

[data-route="home"] .site-shell {
  width: 100%;
  max-width: none;
  padding: 0;
}

[data-route="home"] .topbar {
  width: min(100%, var(--layout-width));
  margin: 0 auto;
  padding-left: 28px;
  padding-right: 28px;
  background: transparent;
  border-bottom: 0;
}

[data-route="home"] .app-shell {
  min-height: calc(100vh - 68px);
}

/* ─── headings ─── */
.page-header h1,
.training-copy h1,
.done-copy h1,
.modal-card h2,
.training-sidebar h2,
.training-timer h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1.15;
  font-weight: 700;
  color: var(--color-text);
}

.training-copy h1 {
  font-size: 32px;
}

.done-copy h1 {
  font-size: 36px;
  color: var(--color-action);
}

/* ─── muted text ─── */
.page-intro,
.body-copy,
.pose-description,
.lead,
.status-note,
.timer-footnote,
.training-en,
.training-meta {
  margin: 0;
  color: var(--color-text-muted);
}

.page-intro {
  margin-top: 10px;
  font-size: 17px;
}

/* ─── shared card surface ─── */
.pose-card,
.done-copy,
.done-visual,
.training-stage,
.training-timer,
.training-sidebar,
.modal-card {
  background: var(--color-surface-glass);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

/* ─── page grid ─── */
.page-shell,
.done-grid {
  display: grid;
  gap: 28px;
}

/* ─── poses grid ─── */
.poses-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.pose-card {
  padding: 22px;
  display: grid;
  gap: 16px;
  transition: all 300ms var(--ease-out-expo);
}

.pose-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lifted);
  border-color: var(--color-border-strong);
}

.pose-card-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.pose-number,
.pose-duration,
.training-meta,
.timer-label,
.timer-side-meta,
.jump-index,
.mini-kicker {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-soft);
  letter-spacing: 0.02em;
}

.pose-copy {
  display: grid;
  gap: 4px;
}

.pose-card img {
  width: 100%;
  height: 200px;
  object-fit: contain;
  object-position: center;
  background: var(--color-cream);
  border-radius: var(--radius-md);
  padding: 16px;
  border: 1px solid rgba(138, 114, 93, 0.06);
}

.pose-copy h4 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.25;
  font-weight: 700;
}

.pose-description {
  font-size: 14.5px;
  line-height: 1.55;
}

/* ─── training layout ─── */
.training-shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.training-sidebar {
  position: sticky;
  top: 84px;
  padding: 18px;
}

.training-sidebar h2 {
  font-size: 16px;
}

.sidebar-list {
  display: grid;
  gap: 6px;
  margin-top: 14px;
}

.pose-jump {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 46px;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-left: 3px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text);
  text-align: left;
  transition: all 180ms ease;
}

.pose-jump:hover,
.pose-jump:focus-visible {
  background: rgba(232, 226, 218, 0.5);
  border-left-color: var(--color-border);
}

.pose-jump.is-active {
  background: var(--color-cream);
  border-color: var(--color-border);
  border-left-color: var(--color-action);
  box-shadow: 0 1px 4px rgba(61, 46, 35, 0.06);
}

.pose-jump.is-complete .jump-copy strong {
  color: var(--color-text-soft);
}

.jump-copy strong,
.jump-copy small {
  display: block;
}

.jump-copy strong {
  font-size: 14px;
  font-weight: 600;
}

.jump-copy small {
  font-size: 12px;
  color: var(--color-text-soft);
}

/* ─── training main area ─── */
.training-main {
  display: grid;
  gap: 20px;
}

.training-stage {
  display: grid;
  grid-template-columns: minmax(280px, 420px) minmax(0, 1fr);
  gap: 28px;
  padding: 24px;
}

.training-image-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  background: var(--color-cream);
  border-radius: var(--radius-md);
  border: 1px solid rgba(138, 114, 93, 0.06);
}

.training-image-wrap img {
  max-height: 320px;
  object-fit: contain;
}

.training-copy {
  display: grid;
  align-content: start;
  gap: 12px;
}

.training-en {
  font-size: 15px;
  font-style: italic;
  opacity: 0.7;
}

.training-meta {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

/* ─── timer ─── */
.training-timer {
  overflow: hidden;
}

.timer-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.timer-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.timer-value {
  margin: 20px 0 10px;
  font-family: var(--font-display);
  font-size: 104px;
  line-height: 0.9;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text);
  transition: color 300ms ease;
}

/* make timer pulse when running (via JS adding class, or just always subtle) */
.timer-footnote {
  font-size: 14px;
  color: var(--color-text-soft);
}

.training-actions,
.done-actions,
.modal-actions,
.training-footer,
.home-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.training-actions {
  margin-top: 22px;
}

.training-footer {
  margin-top: auto;
  padding: 18px 24px;
  border-top: 1px solid var(--color-border);
  justify-content: space-between;
  align-items: center;
  background: rgba(138, 114, 93, 0.04);
}

.status-note {
  max-width: 520px;
  font-size: 13px;
  color: var(--color-text-soft);
}

.page-header {
  padding-top: 8px;
}

/* ─── done screen ─── */
.done-grid {
  grid-template-columns: minmax(320px, 1fr) minmax(320px, 1fr);
  align-items: stretch;
  animation: fadeUp 600ms var(--ease-out-expo) both;
}

.done-visual,
.done-copy {
  padding: 32px;
}

.done-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-cream);
}

.done-visual img {
  max-height: 480px;
  object-fit: contain;
}

.done-copy {
  display: grid;
  align-content: center;
  gap: 16px;
}

.done-copy .lead {
  font-size: 17px;
}

body.is-modal-open {
  overflow: hidden;
}

/* ─── modal ─── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(61, 46, 35, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: fadeIn 200ms ease both;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-card {
  width: min(100%, 500px);
  padding: 28px;
  animation: modalPop 350ms var(--ease-spring) both;
}

@keyframes modalPop {
  from {
    opacity: 0;
    transform: scale(0.92) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-card p {
  margin: 14px 0 0;
  color: var(--color-text-muted);
}

.modal-actions {
  margin-top: 22px;
}

/* ─── acknowledgments ─── */
.ack-copy {
  max-width: 700px;
  background: var(--color-surface-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  box-shadow: var(--shadow-soft);
}

.ack-copy ul {
  margin: 0;
  padding-left: 20px;
}

.ack-copy li + li {
  margin-top: 12px;
}

.ack-copy li {
  color: var(--color-text);
  line-height: 1.6;
}

.ack-copy a {
  color: var(--color-action);
  text-decoration-color: var(--color-action-glow);
  text-underline-offset: 2px;
  transition: color 150ms ease;
}

.ack-copy a:hover {
  color: var(--color-action-hover);
}

/* ─── responsive ─── */
@media (max-width: 900px) {
  .training-shell,
  .training-stage,
  .done-grid {
    grid-template-columns: 1fr;
  }

  .training-sidebar {
    position: static;
  }

  .training-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 700px) {
  .site-shell {
    padding-left: 16px;
    padding-right: 16px;
  }

  [data-route="home"] .topbar {
    padding-left: 16px;
    padding-right: 16px;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    min-height: auto;
  }

  .topnav {
    gap: 4px;
    overflow-x: auto;
    width: 100%;
  }

  .view {
    padding-top: 20px;
  }

  .training-sidebar,
  .training-main,
  .training-stage,
  .training-timer,
  .pose-card,
  .done-copy,
  .done-visual,
  .modal-card {
    padding: 16px;
  }

  .timer-body {
    padding: 16px;
  }

  .training-footer {
    padding: 14px 16px;
  }

  .sidebar-list {
    grid-auto-flow: column;
    grid-auto-columns: minmax(200px, 1fr);
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .timer-value {
    font-size: 72px;
  }

  .training-copy h1 {
    font-size: 26px;
  }

  .done-copy h1 {
    font-size: 28px;
  }

  .home-overlay {
    padding-bottom: 28px;
  }

  .home-actions {
    width: calc(100% - 32px);
  }

  .home-actions .button {
    width: 100%;
  }

  .ack-copy {
    padding: 20px;
  }

  .poses-grid {
    grid-template-columns: 1fr;
  }
}

/* ─── scrollbar styling ─── */
.sidebar-list::-webkit-scrollbar {
  height: 4px;
}

.sidebar-list::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar-list::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 2px;
}