/* layout.css — Structure générale de l'application */

body {
  font-family: var(--font-body);
  font-weight: 300;
  color: var(--color-washi);
  background: var(--color-ink);
  line-height: 1.7;
}

/* ─── Fond permanent ─── */
#pond {
  position: fixed;
  inset: 0;
  z-index: var(--z-pond);
  overflow: hidden;
}

#pond-canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pond-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(26,26,20,0.3) 0%, transparent 60%),
    radial-gradient(ellipse at 50% 100%, rgba(26,26,20,0.5) 0%, transparent 70%);
}

.pond-stones {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse 80px 30px at 8% 75%, rgba(26,26,20,0.4) 0%, transparent 100%),
    radial-gradient(ellipse 60px 22px at 92% 80%, rgba(26,26,20,0.35) 0%, transparent 100%),
    radial-gradient(ellipse 100px 35px at 15% 20%, rgba(26,26,20,0.25) 0%, transparent 100%);
  pointer-events: none;
}

/* ─── Application ─── */
#app {
  position: relative;
  z-index: var(--z-app);
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  grid-template-areas:
    "header"
    "progress"
    "stage"
    "messages";
}

/* ─── En-tête ─── */
#site-header {
  grid-area: header;
  z-index: var(--z-header);
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid rgba(201, 165, 90, 0.15);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  background: rgba(26, 26, 20, 0.6);
}

.header-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand-kanji {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-gold);
  line-height: 1;
  filter: drop-shadow(0 0 8px rgba(201,165,90,0.3));
  transition: filter var(--duration-slow) var(--ease-out);
}

.brand-kanji:hover {
  filter: drop-shadow(0 0 16px rgba(201,165,90,0.5));
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand-name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--color-washi);
  text-transform: uppercase;
}

.brand-subtitle {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-gold);
  opacity: 0.85;
}

.header-status {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-gold-light);
  opacity: 0.7;
}

/* ─── Zone principale ─── */
#game-stage {
  grid-area: stage;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
  min-height: 0;
}

/* ─── Écrans ─── */
.screen {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

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

/* ─── Zone de messages ─── */
#message-zone {
  grid-area: messages;
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-message);
  pointer-events: none;
  width: min(480px, calc(100% - 2rem));
}

#message-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

/* ─── Bouton principal ─── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  background: transparent;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  transition:
    background var(--duration-base) var(--ease-out),
    color var(--duration-base) var(--ease-out),
    transform var(--duration-fast),
    box-shadow var(--duration-base) var(--ease-out);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--color-gold);
  transform: translateX(-101%);
  transition: transform var(--duration-base) var(--ease-out);
  z-index: -1;
}

.btn-primary:hover {
  color: var(--color-ink);
  box-shadow: 0 0 20px rgba(201,165,90,0.25);
}

.btn-primary:hover::before {
  transform: translateX(0);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-6);
  background: transparent;
  border: 1px solid rgba(245, 240, 232, 0.25);
  color: rgba(245, 240, 232, 0.7);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  border-radius: var(--radius-sm);
  transition: all var(--duration-base) var(--ease-out);
  cursor: pointer;
}

.btn-secondary:hover {
  border-color: rgba(245, 240, 232, 0.5);
  color: var(--color-washi);
}

/* ─── Chargement ─── */
.module-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  opacity: 1;
  transition: opacity var(--duration-base) var(--ease-out);
}

.module-loading.hidden {
  opacity: 0;
  pointer-events: none;
}

.loading-koi {
  width: 48px;
  height: 48px;
  border: 2px solid rgba(201,165,90,0.15);
  border-top-color: var(--color-gold);
  border-radius: 50%;
  animation: spin 1.2s linear infinite;
}

.loading-text {
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-gold);
  opacity: 0.7;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ─── Responsive ─── */
@media (max-width: 600px) {
  #site-header {
    padding: var(--space-3) var(--space-4);
  }

  .brand-name {
    font-size: var(--text-xs);
    letter-spacing: 0.08em;
  }

  #game-stage {
    padding: var(--space-6) var(--space-3);
    align-items: flex-start;
  }
}