/* ============================================
   Towers (TD) - Mobile-first stylesheet
   Breakpoints: <640 mobile, 640-1024 tablet, >1024 desktop
   Touch targets: minimum 44x44px (WCAG)
   ============================================ */

:root {
  --bg: #0a0a14;
  --bg-2: #12121f;
  --bg-3: #1a1a2e;
  --fg: #d8e0ff;
  --fg-dim: #8892b0;
  --accent: #66e0ff;
  --accent-2: #ff6b9d;
  --warn: #ffcc33;
  --ok: #66ff99;
  --danger: #ff5566;
  --border: #2a2a40;
  --mono: 'JetBrains Mono', 'Courier New', monospace;
  --tap: 44px;          /* min touch target */
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-top: env(safe-area-inset-top, 0px);
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--fg);
  font-family: var(--mono);
  font-size: 14px;
  min-height: 100vh;
  min-height: 100dvh;            /* dynamic viewport, handles iOS toolbars */
  overscroll-behavior: none;     /* no rubber-band on iOS canvas */
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--accent); text-decoration: none; }
a:hover, a:focus { text-decoration: underline; }

/* ===== Header ===== */
.td-header {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 16px;
  padding-top: calc(10px + var(--safe-top));
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.td-logo {
  font-size: 16px; font-weight: bold;
  color: var(--accent); letter-spacing: 2px;
  flex-shrink: 0;
}
.td-header nav {
  display: flex; gap: 4px;
  flex-wrap: wrap;
  order: 3;
  width: 100%;
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--border);
}
.td-header nav a {
  color: var(--fg-dim);
  padding: 8px 10px;
  font-size: 12px;
  min-height: var(--tap);
  display: inline-flex;
  align-items: center;
}
.td-header nav a:active,
.td-header nav a:hover { color: var(--accent); }
.td-user {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--fg-dim);
  flex-shrink: 0;
}
.td-user .avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
}
.td-user .display-name {
  display: none;
}

@media (min-width: 640px) {
  .td-header { padding: 12px 24px; }
  .td-logo { font-size: 18px; }
  .td-header nav {
    order: 2;
    width: auto;
    margin-top: 0;
    padding-top: 0;
    border-top: none;
  }
  .td-header nav a { font-size: 13px; padding: 8px 14px; }
  .td-user .display-name { display: inline; }
}

/* ===== Footer ===== */
.td-footer {
  padding: 12px 16px calc(12px + var(--safe-bottom));
  text-align: center;
  color: var(--fg-dim);
  border-top: 1px solid var(--border);
  font-size: 11px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center; justify-content: center;
  min-height: var(--tap);
  padding: 10px 18px;
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 14px;
  text-decoration: none;
  transition: all 0.15s;
  touch-action: manipulation;
  user-select: none;
}
.btn:hover, .btn:focus { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.btn:active { transform: scale(0.97); }
.btn.primary { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.btn.primary:hover, .btn.primary:focus { background: transparent; color: var(--accent); }
.btn.small { padding: 8px 14px; font-size: 12px; min-height: 36px; }
.link-btn {
  background: none; border: none;
  color: var(--fg-dim); cursor: pointer;
  font-family: var(--mono); font-size: 12px;
  padding: 8px; min-height: var(--tap);
  text-decoration: underline;
}
.link-btn:hover, .link-btn:active { color: var(--accent); }

/* ===== Landing ===== */
.td-landing {
  max-width: 900px; margin: 0 auto;
  padding: 32px 20px;
}
.hero h1 {
  font-size: 40px;
  margin: 0;
  color: var(--accent);
  letter-spacing: 4px;
  word-break: break-word;
}
.hero .tag { font-size: 16px; color: var(--fg-dim); margin: 0 0 16px; }
.hero p { font-size: 14px; line-height: 1.6; }
.cta-row {
  display: flex; gap: 10px; margin-top: 24px;
  flex-direction: column;
}
.cta-row .btn { width: 100%; }

@media (min-width: 640px) {
  .td-landing { padding: 60px 24px; }
  .hero h1 { font-size: 56px; letter-spacing: 6px; }
  .hero .tag { font-size: 18px; }
  .cta-row { flex-direction: row; flex-wrap: wrap; gap: 12px; }
  .cta-row .btn { width: auto; }
}
@media (min-width: 1024px) {
  .hero h1 { font-size: 64px; letter-spacing: 8px; }
}

.status-bar {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--fg-dim); font-size: 11px;
  word-break: break-all;
}
.status-bar code { background: var(--bg-2); padding: 2px 6px; color: var(--accent); }

/* ===== Game / Builder layout =====
   Mobile: stack vertically - canvas on top, controls below in a sheet
   Desktop: side-by-side */
.td-game,
.td-builder {
  display: grid;
  grid-template-rows: minmax(50vh, 1fr) auto;
  grid-template-columns: 1fr;
  height: calc(100vh - 56px);
  height: calc(100dvh - 56px);
}
.canvas-host {
  background: #050510;
  position: relative;
  min-height: 200px;
  touch-action: none;            /* prevent scroll while interacting with canvas */
}
.canvas-host canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

@media (min-width: 1024px) {
  .td-game, .td-builder {
    grid-template-rows: 1fr;
    grid-template-columns: 1fr 340px;
    height: calc(100vh - 60px);
    height: calc(100dvh - 60px);
  }
}

/* ===== HUD / form sidebar =====
   Mobile: bottom sheet, scrollable, max ~40vh so canvas isn't crushed */
.td-hud,
.td-form {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 14px 16px calc(14px + var(--safe-bottom));
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  max-height: 50vh;
  max-height: 50dvh;
}
@media (min-width: 1024px) {
  .td-hud, .td-form {
    border-top: none;
    border-left: 1px solid var(--border);
    padding: 20px;
    max-height: none;
  }
}

.hud-section { margin-bottom: 16px; }
.hud-section h3 {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 11px; text-transform: uppercase; letter-spacing: 2px;
}
.hud-section div { margin: 4px 0; font-size: 13px; }
.hud-section small { color: var(--fg-dim); font-size: 11px; line-height: 1.5; }

/* ===== Tower picker - horizontal scroll on mobile, list on desktop ===== */
#hud-tower-picker {
  display: flex;
  flex-direction: row;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 6px;
  scroll-snap-type: x mandatory;
}
#hud-tower-picker > em { flex-shrink: 0; }

.tower-pick {
  flex: 0 0 auto;
  min-width: 140px;
  scroll-snap-align: start;
  text-align: left;
  padding: 10px 12px;
  min-height: var(--tap);
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  cursor: pointer;
  font-family: var(--mono);
  transition: all 0.1s;
  touch-action: manipulation;
}
.tower-pick:active,
.tower-pick:hover { border-color: var(--accent); }
.tower-pick.active { border-color: var(--accent-2); background: rgba(255, 107, 157, 0.12); }
.tower-pick strong { display: block; color: var(--accent); font-size: 13px; }
.tower-pick span { display: block; font-size: 10px; color: var(--fg-dim); margin-top: 3px; }

@media (min-width: 1024px) {
  #hud-tower-picker {
    flex-direction: column;
    overflow-x: visible;
    padding-bottom: 0;
  }
  .tower-pick { min-width: 0; width: 100%; }
  .tower-pick strong { font-size: 14px; }
  .tower-pick span { font-size: 11px; }
}

/* ===== Form ===== */
.td-form h2 {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 18px;
}
.td-form label {
  display: block; margin: 10px 0;
  color: var(--fg-dim);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.td-form input,
.td-form textarea,
.td-form select {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 12px;
  min-height: var(--tap);
  background: var(--bg); color: var(--fg);
  border: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 16px;            /* iOS won't zoom on focus if >=16px */
}
.td-form input:focus,
.td-form textarea:focus,
.td-form select:focus {
  outline: none; border-color: var(--accent);
}
.td-form textarea { min-height: 80px; resize: vertical; }
.td-form fieldset {
  border: 1px solid var(--border);
  padding: 12px;
  margin: 14px 0;
}
.td-form fieldset legend {
  color: var(--accent);
  padding: 0 8px;
  font-size: 10px; text-transform: uppercase;
}

/* Map builder tool buttons - wrap nicely */
.tool-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 6px;
  margin: 10px 0;
}
.tool-row strong {
  grid-column: 1 / -1;
  font-size: 11px;
  color: var(--fg-dim);
  text-transform: uppercase;
}
.tool-row button {
  padding: 10px 6px;
  min-height: var(--tap);
  background: var(--bg); color: var(--fg);
  border: 1px solid var(--border);
  cursor: pointer;
  font-family: var(--mono); font-size: 11px;
  touch-action: manipulation;
}
.tool-row button.active { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.tool-row button:active { transform: scale(0.96); }

/* ===== Browse ===== */
.td-browse {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 16px;
}
.td-browse section { margin-bottom: 32px; }
.td-browse h1 { color: var(--accent); font-size: 24px; }
.td-browse h2 { color: var(--accent); font-size: 18px; }
#tower-grid, #map-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 10px;
  margin-top: 12px;
}
.card {
  padding: 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 2px;
  font-size: 13px;
}
.card:hover, .card:active { border-color: var(--accent); }

@media (min-width: 640px) {
  .td-browse { padding: 40px 24px; }
  #tower-grid, #map-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
  }
}

/* ===== Mobile-only HUD compact mode toggle =====
   Tap to collapse the bottom sheet so phone players can see more board. */
.hud-toggle {
  display: none;
  position: absolute;
  top: -32px;
  right: 12px;
  width: 64px; height: 24px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: 4px 4px 0 0;
  color: var(--fg-dim);
  font-family: var(--mono); font-size: 11px;
  cursor: pointer;
  z-index: 10;
}
@media (max-width: 1023px) {
  .td-hud, .td-form { position: relative; }
  .hud-toggle { display: block; }
  .td-hud.collapsed,
  .td-form.collapsed {
    max-height: 0;
    padding-top: 0;
    padding-bottom: var(--safe-bottom);
    overflow: hidden;
  }
}

/* ===== Landscape orientation hint for phones =====
   Hex board is much more comfortable in landscape on small screens. */
.orient-hint {
  display: none;
  position: fixed;
  bottom: 12px; left: 50%;
  transform: translateX(-50%);
  background: var(--bg-3);
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 8px 14px;
  font-size: 11px;
  border-radius: 4px;
  z-index: 100;
  pointer-events: none;
}
@media (max-width: 640px) and (orientation: portrait) {
  .orient-hint.show { display: block; }
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}