/* ==========================================================================
   Mahjong — custom styles
   Palette: felt green, ivory tiles, gold accents, dark red-brown buttons
   ========================================================================== */

:root {
  --aspect-ratio: 1.618/1;

  --felt-light: #1e7a4e;
  --felt-dark: #0b4a2e;
  --felt-edge: #073522;

  --tile-face-1: #fdfdf7;
  --tile-face-2: #ece8d8;
  --tile-text: #253530;

  --gold: #e8b64c;
  --gold-soft: #f3d48a;
  --btn-brown: #7a3b2e;
  --btn-brown-dark: #5d2b21;
  --cream: #f5ecd7;

  --topbar-h: 64px;
  --controls-h: 96px;
}

html, body {
  height: 100%;
  margin: 0;
  overflow: hidden;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--felt-dark);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}

.screen {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(120% 90% at 50% 38%, var(--felt-light) 0%, var(--felt-dark) 70%, var(--felt-edge) 100%);
  color: var(--cream);
}

/* ==========================================================================
   Hauptmenü
   ========================================================================== */

#menu-screen {
  align-items: center;
  justify-content: center;
  overflow-y: auto;
}

.menu-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 32px 24px;
  width: min(520px, 92vw);
}

.menu-tile-logo {
  width: 86px;
  height: 139px; /* golden ratio 1:1.618 */
  border-radius: 14px;
  background: linear-gradient(155deg, var(--tile-face-1) 0%, var(--tile-face-2) 100%);
  border: 1px solid rgba(0, 0, 0, .15);
  box-shadow:
    0 8px 18px rgba(0, 0, 0, .45),
    inset 2px 2px 0 rgba(255, 255, 255, .8),
    inset -2px -2px 0 rgba(0, 0, 0, .12);
  display: flex;
  align-items: center;
  justify-content: center;
  transform: rotate(-5deg);
  margin-bottom: 6px;
}

.menu-tile-logo svg {
  width: 56px;
  height: 56px;
  stroke-width: 2.2;
  color: #b52c72;
}

.menu-title {
  font-family: Georgia, serif;
  font-size: clamp(44px, 8vw, 64px);
  font-weight: bold;
  letter-spacing: 2px;
  margin: 0;
  color: var(--cream);
  text-shadow: 0 3px 10px rgba(0, 0, 0, .5);
}

.menu-subtitle {
  font-size: 19px;
  opacity: .85;
  margin: 0 0 18px;
}

.menu-btn {
  width: 100%;
  padding: 18px 22px;
  border-radius: 18px;
  border: 2px solid rgba(0, 0, 0, .25);
  background: linear-gradient(165deg, #8a4536 0%, var(--btn-brown-dark) 100%);
  color: var(--cream);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  box-shadow: 0 5px 14px rgba(0, 0, 0, .4), inset 0 1px 0 rgba(255, 255, 255, .18);
  transition: transform .12s ease;
}

.menu-btn:hover, .menu-btn:focus {
  color: #fff;
  transform: translateY(-2px);
  background: linear-gradient(165deg, #96503f 0%, var(--btn-brown) 100%);
}

.menu-btn:active { transform: translateY(1px) scale(.99); }

.menu-btn-continue {
  background: linear-gradient(165deg, #c79a3e 0%, #96712a 100%);
  color: #2c2413;
}

.menu-btn-continue:hover, .menu-btn-continue:focus {
  background: linear-gradient(165deg, #d5a848 0%, #a67d30 100%);
  color: #2c2413;
}

.menu-btn-title {
  font-size: 24px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.menu-btn-title svg { width: 26px; height: 26px; color: var(--gold-soft); }
.menu-btn-continue .menu-btn-title svg { color: #4d3a12; }

.menu-btn-desc { font-size: 16px; opacity: .82; }

/* difficulty triple toggle */
.diff-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}

.diff-label {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  opacity: .7;
}

.diff-toggle {
  display: flex;
  padding: 4px;
  border-radius: 999px;
  background: rgba(0, 0, 0, .32);
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, .4);
}

.diff-toggle button {
  border: none;
  background: transparent;
  color: var(--cream);
  font-size: 18px;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 999px;
  transition: background .15s ease, color .15s ease;
}

.diff-toggle button.active {
  background: linear-gradient(165deg, #c79a3e 0%, #96712a 100%);
  color: #2c2413;
  box-shadow: 0 2px 6px rgba(0, 0, 0, .35);
}

/* ==========================================================================
   Top-Bar
   ========================================================================== */

/* 3 equal columns → Punkte sits exactly at screen center, Level/Paare mirror
   each other; the back button floats on top and doesn't shift the stats */
#topbar {
  height: var(--topbar-h);
  flex: 0 0 auto;
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: center;
  background: rgba(0, 0, 0, .28);
  box-shadow: 0 2px 8px rgba(0, 0, 0, .25);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-self: center;
}

.stat-label {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1px;
  opacity: .75;
}

.stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--gold-soft);
  line-height: 1.1;
}

.icon-btn {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, .12);
  color: var(--cream);
  display: flex;
  align-items: center;
  justify-content: center;
}

#btn-back {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
}

.icon-btn:active { background: rgba(255, 255, 255, .25); }
.icon-btn svg { width: 26px; height: 26px; }

/* ==========================================================================
   Sammel-Leiste (Bar-Modus)
   ========================================================================== */

#bar-strip {
  flex: 0 0 auto;
  padding: 10px 12px 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.bar-slots {
  display: flex;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 14px;
  background: rgba(0, 0, 0, .30);
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, .4);
}

.bar-slot {
  width: 52px;
  height: 74px;
  border-radius: 8px;
  border: 2px dashed rgba(245, 236, 215, .35);
  display: flex;
  align-items: center;
  justify-content: center;
}

.bar-slot.filled { border-style: solid; border-color: transparent; }

.bar-caption { font-size: 14px; opacity: .65; }

/* tutorial instruction banner */
#tut-banner {
  flex: 0 0 auto;
  margin: 10px 16px 0;
  padding: 14px 20px;
  border-radius: 14px;
  background: rgba(0, 0, 0, .28);
  font-size: 20px;
  line-height: 1.45;
  text-align: center;
  box-shadow: inset 0 1px 4px rgba(0, 0, 0, .3);
}

/* ==========================================================================
   Board & Tiles
   ========================================================================== */

#board-area {
  flex: 1 1 auto;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

#board {
  position: relative;
  transform-origin: center center;
}

.tile {
  position: absolute;
  border-radius: 11px;
  background: linear-gradient(155deg, var(--tile-face-1) 0%, var(--tile-face-2) 100%);
  border: 1px solid rgba(0, 0, 0, .15);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

/* symbol artwork, centred by the tile's own flex box.
   svg.tile-face  — a Lucide icon (see js/tiles.js)
   span.tile-face-img — a custom image file, `contain` keeps its proportions */
.tile-face {
  width: 70%;
  height: 70%;
  pointer-events: none;
}

.tile-face-img {
  width: 78%;
  height: 78%;
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
}

/* free tiles: bright, layered 3D bevel (outer shadow grows per layer) */
.tile.free {
  box-shadow:
    0 3px 6px rgba(0, 0, 0, .35),
    inset 2px 2px 0 rgba(255, 255, 255, .8),
    inset -2px -2px 0 rgba(0, 0, 0, .12);
}

.tile.free.layer-1 { box-shadow: 0 5px 9px rgba(0, 0, 0, .38), inset 2px 2px 0 rgba(255, 255, 255, .8), inset -2px -2px 0 rgba(0, 0, 0, .12); }
.tile.free.layer-2 { box-shadow: 0 7px 12px rgba(0, 0, 0, .42), inset 2px 2px 0 rgba(255, 255, 255, .8), inset -2px -2px 0 rgba(0, 0, 0, .12); }

.tile.blocked {
  filter: grayscale(.55) brightness(.72);
  cursor: default;
  box-shadow:
    0 2px 4px rgba(0, 0, 0, .3),
    inset 1px 1px 0 rgba(255, 255, 255, .4);
}

.tile.blocked.layer-1 { box-shadow: 0 4px 7px rgba(0, 0, 0, .33), inset 1px 1px 0 rgba(255, 255, 255, .4); }
.tile.blocked.layer-2 { box-shadow: 0 6px 10px rgba(0, 0, 0, .36), inset 1px 1px 0 rgba(255, 255, 255, .4); }

.tile.sel {
  outline: 4px solid var(--gold);
  outline-offset: -2px;
  box-shadow:
    0 0 18px 4px rgba(232, 182, 76, .75),
    inset 2px 2px 0 rgba(255, 255, 255, .8);
}

.tile.hinting {
  outline: 4px solid var(--gold-soft);
  outline-offset: -2px;
}

.tile.bad {
  outline: 4px solid #d64541;
  outline-offset: -2px;
  animation: bad-blink .55s linear;
}

@keyframes bad-blink {
  0%, 40%, 80% { box-shadow: 0 0 16px 5px rgba(214, 69, 65, .8); }
  20%, 60%, 100% { box-shadow: 0 0 4px 1px rgba(214, 69, 65, .3); }
}

/* flying clone used for board→bar animation */
.tile.flying {
  position: fixed;
  margin: 0;
  z-index: 3000;
  pointer-events: none;
}

.bar-slot .mini-tile {
  position: relative;
  width: 46px;
  height: 66px;
  border-radius: 7px;
  background: linear-gradient(155deg, var(--tile-face-1) 0%, var(--tile-face-2) 100%);
  border: 1px solid rgba(0, 0, 0, .15);
  box-shadow: 0 2px 5px rgba(0, 0, 0, .4), inset 1px 1px 0 rgba(255, 255, 255, .7);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   Untere Kontrollleiste
   ========================================================================== */

/* space-evenly → gaps between buttons equal the distance to both edges */
#controls {
  height: var(--controls-h);
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-evenly;
  background: rgba(0, 0, 0, .28);
  box-shadow: 0 -2px 8px rgba(0, 0, 0, .25);
}

.ctrl-btn {
  position: relative;
  width: 68px;
  height: 68px;
  border-radius: 50%;
  border: 2px solid rgba(0, 0, 0, .3);
  background: linear-gradient(165deg, #8a4536 0%, var(--btn-brown-dark) 100%);
  color: var(--gold-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 5px 12px rgba(0, 0, 0, .45), inset 0 1px 0 rgba(255, 255, 255, .2);
  transition: transform .1s ease;
}

.ctrl-btn:active { transform: scale(.93); }
.ctrl-btn svg { width: 30px; height: 30px; }

.ctrl-btn:disabled {
  filter: grayscale(.6) brightness(.65);
  box-shadow: 0 2px 6px rgba(0, 0, 0, .3);
}

.badge-count {
  position: absolute;
  top: -4px;
  right: -6px;
  min-width: 26px;
  height: 26px;
  padding: 0 6px;
  border-radius: 13px;
  background: var(--gold);
  color: #3a2c10;
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 5px rgba(0, 0, 0, .4);
}

.badge-inf svg { width: 16px; height: 16px; }

/* ==========================================================================
   Toast
   ========================================================================== */

#toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--controls-h) + 26px);
  transform: translateX(-50%);
  max-width: min(480px, 88vw);
  padding: 14px 22px;
  border-radius: 14px;
  background: rgba(15, 25, 20, .92);
  color: var(--cream);
  font-size: 18px;
  text-align: center;
  z-index: 2500;
  box-shadow: 0 6px 18px rgba(0, 0, 0, .5);
  pointer-events: none;
}

/* ==========================================================================
   Modals
   ========================================================================== */

.game-modal {
  border-radius: 22px;
  border: 2px solid rgba(232, 182, 76, .5);
  background:
    radial-gradient(130% 110% at 50% 20%, #17593a 0%, #0c3d26 100%);
  color: var(--cream);
  box-shadow: 0 14px 40px rgba(0, 0, 0, .6);
}

.game-modal .modal-body {
  padding: 30px 28px 26px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.modal-headline {
  font-family: Georgia, serif;
  font-size: 34px;
  font-weight: bold;
  margin: 0;
  color: var(--gold-soft);
  text-align: center;
}

.modal-text {
  font-size: 19px;
  margin: 0;
  text-align: center;
  opacity: .9;
}

.end-stats { display: flex; gap: 34px; margin: 4px 0; }
.end-stat { display: flex; flex-direction: column; align-items: center; }
.end-stat .stat-value { font-size: 32px; }

.modal-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  margin-top: 8px;
}

.modal-btn {
  width: 100%;
  padding: 14px;
  font-size: 20px;
  font-weight: 600;
  border-radius: 14px;
  border: 2px solid rgba(0, 0, 0, .25);
  background: rgba(255, 255, 255, .12);
  color: var(--cream);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.modal-btn:hover, .modal-btn:focus { background: rgba(255, 255, 255, .22); color: #fff; }
.modal-btn svg { width: 22px; height: 22px; }

.modal-btn-primary {
  background: linear-gradient(165deg, #c79a3e 0%, #96712a 100%);
  color: #2c2413;
}

.modal-btn-primary:hover, .modal-btn-primary:focus {
  background: linear-gradient(165deg, #d5a848 0%, #a67d30 100%);
  color: #2c2413;
}

/* ==========================================================================
   Konfetti (Sieg)
   ========================================================================== */

.confetti {
  position: fixed;
  top: -20px;
  width: 12px;
  height: 20px;
  border-radius: 3px;
  z-index: 2200;
  pointer-events: none;
}

/* ==========================================================================
   Responsive Feintuning
   ========================================================================== */

@media (max-height: 700px) {
  :root { --topbar-h: 54px; --controls-h: 78px; }
  .ctrl-btn { width: 58px; height: 58px; }
  .stat-value { font-size: 20px; }
}

/* Landscape: header and controls become floating panels at the left and right
   edge so the board gets the full screen height (the scarce axis here) */
@media (orientation: landscape) {
  #topbar {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 5;
    width: auto;
    height: auto;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 7px;
    padding: 12px 18px 14px;
    border-radius: 0 0 18px 0;
  }

  /* back button rejoins the flow as the first item, keeping its corner spot */
  #btn-back {
    position: static;
    transform: none;
    margin-bottom: 3px;
  }

  .stat {
    flex-direction: row;
    align-items: baseline;
    gap: 9px;
  }

  .stat-label { font-size: 12px; }
  .stat-value { font-size: 22px; }

  #controls {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 5;
    width: auto;
    height: auto;
    flex-direction: column;
    justify-content: center;
    gap: 24px;
    padding: 20px 16px;
    border-radius: 18px 0 0 18px;
  }

  /* keep board, bar and tutorial text clear of both floating panels */
  #board-area {
    padding-left: 156px;
    padding-right: 108px;
  }

  #bar-strip {
    padding-left: 156px;
    padding-right: 108px;
  }

  #tut-banner {
    margin-left: 172px;
    margin-right: 124px;
    font-size: 18px;
    padding: 10px 18px;
  }

  #toast { bottom: 26px; }
}