/* ─── Mobile / Touch ──────────────────────────────── */
@media (max-width: 768px) {
  body {
    padding: 0;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    height: 100vh;
    height: 100dvh;
    -webkit-user-select: none;
    user-select: none;
    touch-action: none;
    position: relative;
  }

  /* The fullscreen fixed game-container would otherwise render underneath
     it; mobile already has equivalent controls (theme/language/mute) plus
     How to Play/FAQ links in the hamburger drawer instead. */
  #site-nav {
    display: none;
  }

  /* Keeps the game fullscreen and immediate on mobile — this SEO copy is
     desktop-only, same trade-off as hiding #site-nav above. */
  #hero-intro {
    display: none;
  }

  /* Kept visible on mobile: Google uses mobile-first indexing, so this
     crawlable copy must render on the mobile layout to count. Flows below
     the game panel. */
  #home-content {
    display: block;
    max-width: 100%;
    margin: 16px 12px 0;
    box-sizing: border-box;
  }

  #site-footer {
    display: none;
  }

  /* Hide side panels */
  #left-panel,
  #right-panel,
  #touch-controls {
    display: none !important;
  }

  /* Stats overlaid on top of canvas */
  #mobile-stats {
    display: flex;
    justify-content: space-around;
    align-items: center;
    position: fixed;
    top: env(safe-area-inset-top, 0px);
    left: 0;
    right: 0;
    z-index: 20;
    padding: 6px 12px;
    background: linear-gradient(180deg, var(--panel-bg-top) 0%, rgba(0, 0, 0, 0) 100%);
    pointer-events: none;
  }

  .mobile-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
  }

  .mobile-stat-label {
    font-size: 8px;
    letter-spacing: 2px;
    color: var(--heading-color);
    text-transform: uppercase;
  }

  .mobile-stat span:last-child {
    font-size: 16px;
    font-weight: 700;
    color: var(--stat-value-color);
    font-variant-numeric: tabular-nums;
    font-family: 'Courier New', 'Consolas', monospace;
    text-shadow: 0 0 10px rgba(var(--accent-rgb), 0.5);
  }

  /* Game fills the entire screen */
  #game-container {
    gap: 0;
    position: fixed;
    inset: 0;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  #center-panel {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  #game-canvas {
    width: 100%;
    height: 100%;
    object-fit: contain;
    touch-action: none;
    border: none;
    border-radius: 0;
  }

  #overlay {
    border-radius: 0;
    /* Extra top clearance so the centered content doesn't collide with
       the fixed mobile-stats bar and hold/next panels floating above it. */
    padding-top: 110px;
    gap: 14px;
  }

  #overlay-text {
    font-size: 18px;
    letter-spacing: 3px;
  }

  /* Floating menu button (top-right) */
  #mobile-menu-toggle {
    display: block;
    position: fixed;
    top: env(safe-area-inset-top, 6px);
    right: 8px;
    z-index: 30;
    font-size: 20px;
    color: rgba(var(--accent-rgb), 0.7);
    background: var(--panel-bg-top);
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    padding: 6px 10px;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    cursor: pointer;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }

  #mobile-menu-toggle:active {
    background: rgba(var(--accent-rgb), 0.2);
    border-color: rgba(var(--accent-rgb), 0.8);
    color: var(--stat-value-color);
  }

  /* Hamburger pulse animation for first-time hint */
  #mobile-menu-toggle.hamburger-highlight {
    animation: hamburger-pulse 1.2s ease-in-out infinite;
    border-color: rgba(var(--accent-rgb), 0.8);
    color: var(--stat-value-color);
    box-shadow: 0 0 16px rgba(var(--accent-rgb), 0.6);
  }

  @keyframes hamburger-pulse {
    0%, 100% { transform: scale(1); box-shadow: 0 0 8px rgba(90, 176, 255, 0.4); }
    50% { transform: scale(1.2); box-shadow: 0 0 24px rgba(90, 176, 255, 0.8); }
  }

  /* Hamburger hint tooltip */
  #hamburger-hint {
    display: block;
    position: fixed;
    top: calc(env(safe-area-inset-top, 6px) + 4px);
    right: 52px;
    z-index: 31;
    background: rgba(90, 176, 255, 0.15);
    border: 1px solid rgba(90, 176, 255, 0.5);
    border-radius: 8px;
    padding: 8px 12px;
    color: #d0e4ff;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1px;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    animation: hint-bob 1.5s ease-in-out infinite;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    white-space: nowrap;
  }

  #hamburger-hint.visible {
    opacity: 1;
  }

  .hint-arrow {
    display: inline-block;
    animation: hint-arrow-bounce 0.8s ease-in-out infinite;
  }

  @keyframes hint-bob {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(3px); }
  }

  @keyframes hint-arrow-bounce {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(4px); }
  }

  #keys-section {
    display: none;
  }

  /* Background picker hidden for now — see style.css #background-section */
  #mobile-background-row {
    display: none;
  }

  /* ── Mobile Hold & Next panels ── */
  #mobile-hold,
  #mobile-next {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: fixed;
    z-index: 15;
    /* No panel background — matches the board canvas's own translucency
       instead of stacking another tinted layer on top of it. */
    background: transparent;
    border: 1px solid var(--panel-border-soft);
    border-radius: 8px;
    padding: 4px 6px 6px;
    pointer-events: none;
    opacity: 0.65;
  }

  #mobile-hold {
    top: 40px;
    left: 6px;
  }

  #mobile-next {
    top: 40px;
    right: 6px;
  }

  .mobile-panel-label {
    font-size: 7px;
    letter-spacing: 2px;
    color: var(--heading-color);
    text-transform: uppercase;
    margin-bottom: 2px;
  }

  .mobile-hold-hint {
    font-size: 7px;
    color: var(--kbd-color);
    text-align: center;
    margin-top: 2px;
    letter-spacing: 0.5px;
  }

  #mobile-hold-canvas,
  #mobile-next-canvas {
    border-radius: 4px;
  }

  /* ── Expandable settings drawer ── */
  #mobile-drawer {
    display: block;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: linear-gradient(180deg, var(--panel-bg-top), var(--panel-bg-bottom));
    border-top: 1px solid var(--panel-border);
    padding: 14px 16px;
    padding-bottom: max(16px, env(safe-area-inset-bottom));
    transition: transform 0.3s ease;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }

  #mobile-drawer.drawer-hidden {
    transform: translateY(100%);
  }

  #drawer-content {
    max-width: 380px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  /* Collapsible submenus opened via the CONFIGURATION/AUDIO buttons. */
  .config-hidden {
    display: none;
  }

  #mobile-config-submenu,
  #mobile-audio-submenu {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .drawer-row {
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .drawer-btn {
    flex: 1;
    padding: 11px 6px;
    font-size: 13px;
    font-weight: 700;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    letter-spacing: 1px;
    color: var(--btn-text);
    background: linear-gradient(180deg, var(--btn-bg-top), var(--btn-bg-bottom));
    border: 1px solid var(--btn-border);
    border-radius: 8px;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    cursor: pointer;
  }

  .drawer-btn:active {
    background: rgba(var(--accent-rgb), 0.3);
    border-color: rgba(var(--accent-rgb), 0.7);
    color: var(--stat-value-color);
  }

  .drawer-label {
    font-size: 10px;
    letter-spacing: 2px;
    color: var(--heading-color);
    min-width: 50px;
    text-align: right;
  }

  .drawer-select {
    flex: 1;
    padding: 9px 8px;
    font-size: 13px;
    font-weight: 600;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--btn-text);
    background: var(--canvas-panel-bg);
    border: 1px solid var(--btn-border);
    border-radius: 6px;
    -webkit-appearance: none;
    appearance: none;
  }

  .drawer-select option {
    background: var(--canvas-panel-bg);
    color: var(--btn-text);
  }

  .drawer-slider {
    flex: 1;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(var(--accent-rgb), 0.3);
    border-radius: 3px;
    outline: none;
    touch-action: auto;
  }

  .drawer-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid #1b3a5c;
  }

  .drawer-slider::-moz-range-thumb {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid #1b3a5c;
  }

  #drawer-gestures {
    font-size: 13px;
    color: var(--kbd-color);
    text-align: center;
    letter-spacing: 0.5px;
    padding-top: 6px;
    border-top: 1px solid var(--panel-border-soft);
    line-height: 1.6;
  }

  #drawer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    padding-top: 4px;
  }

  #drawer-links a {
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    letter-spacing: 0.3px;
  }
}

/* Small phones */
@media (max-width: 380px) {
  .drawer-btn {
    padding: 9px 4px;
    font-size: 11px;
  }
}

/* ─── Mobile Landscape ──────────────────────────── */
/* Landscape blocker — hidden by default */
#landscape-blocker {
  display: none;
}

@media (max-width: 768px) and (orientation: landscape) {
  #landscape-blocker {
    display: flex;
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(3, 8, 18, 0.96);
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  .landscape-blocker-content {
    text-align: center;
    color: #d0e4ff;
  }

  .rotate-icon {
    font-size: 64px;
    animation: rotate-hint 2s ease-in-out infinite;
    margin-bottom: 16px;
  }

  @keyframes rotate-hint {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(-90deg); }
    75% { transform: rotate(-90deg); }
  }

  .rotate-text {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 8px;
    text-shadow: 0 0 16px rgba(100, 170, 255, 0.5);
  }

  .rotate-sub {
    font-size: 13px;
    color: #7a9aba;
    letter-spacing: 1px;
  }
}

/* ─── Overlay controls: show touch list instead of keyboard list ──── */
@media (max-width: 768px) and (orientation: portrait) {
  .overlay-controls-desktop {
    display: none;
  }

  .overlay-controls-mobile {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .overlay-control-row {
    font-size: 14px;
  }
}