/* ============================================
   Snake Escape 3D - Global Styles
   Design tokens and layout only; no inline CSS.
   ============================================ */

:root {
  --bg-color: #2b1d1a;
  --accent: #ffb300;
  --text-color: #efebe9;
  --wood-dark: #281815;
  --wood-mid: #3e2723;
  --wood-border: #5d4037;
  --wood-light: #4e342e;
  --text-muted: #bcaaa4;
  --text-secondary: #d7ccc8;
  --text-tertiary: #a1887f;
  --text-label: #8d6e63;
  --shadow-press: #1a100e;
  --btn-gradient-start: #ffb300;
  --btn-gradient-end: #ff6f00;
  --btn-shadow: #b34e00;
  --modal-overlay: rgba(26, 16, 14, 0.92);
}

/* Base – game font throughout */
body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  background-image: radial-gradient(circle at center, #4e342e 0%, #1a100e 100%);
  color: var(--text-color);
  font-family: 'Russo One', 'Segoe UI', system-ui, sans-serif;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  touch-action: none;
}

/* Layout */
#game-wrapper {
  position: relative;
  padding: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 480px;
}

/* When start pop-up is open: hide game UI and game board frame so only pop-up + background show */
#game-wrapper.start-screen-open .corner-controls,
#game-wrapper.start-screen-open .top-center-controls {
  visibility: hidden;
  pointer-events: none;
}

/* When solution is playing: hide corner action buttons, show Play Again */
#game-wrapper.solution-playing .corner-controls--right {
  visibility: hidden;
  pointer-events: none;
}

#game-wrapper.solution-playing .top-center-controls {
  display: flex;
  visibility: visible;
  pointer-events: all;
}

#game-wrapper.start-screen-open #game-container {
  border: none;
  box-shadow: none;
  background: transparent;
  padding: 0;
}

#game-wrapper.start-screen-open #gameCanvas {
  visibility: hidden;
}

/* Corner controls – fixed to screen corners, not above gameboard */
.corner-controls {
  position: fixed;
  top: 12px;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 8px;
}

.corner-controls--left {
  left: 12px;
}

.corner-controls--right {
  right: 12px;
}

/* Play Again button: fixed, below top buttons row – game board position unchanged */
.top-center-controls {
  position: fixed;
  top: 64px; /* below 12px + 44px button row */
  left: 50%;
  transform: translateX(-50%);
  z-index: 55;
  display: none;
  justify-content: center;
  align-items: center;
}

/* All corner buttons: same size, icon only */
.corner-btn {
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  background: var(--wood-mid);
  border: 2px solid var(--wood-border);
  color: var(--text-muted);
  border-radius: 10px;
  font-size: 18px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 0 var(--shadow-press);
  transition: transform 0.1s, box-shadow 0.1s, color 0.1s, border-color 0.1s, background 0.1s;
  box-sizing: border-box;
  font-family: 'Russo One', sans-serif;
}

#top-play-now-btn {
  display: inline-block;
}

.btn-play-again {
  background: linear-gradient(135deg, var(--btn-gradient-start) 0%, var(--btn-gradient-end) 100%);
  color: var(--wood-mid);
  border: none;
  padding: 10px 32px;
  font-size: 16px;
  font-weight: 800;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 5px 0 var(--btn-shadow);
  transition: transform 0.1s, box-shadow 0.1s, opacity 0.1s;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.btn-play-again:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 7px 0 var(--btn-shadow);
}

.btn-play-again:active:not(:disabled) {
  transform: translateY(3px);
  box-shadow: 0 0 0 var(--btn-shadow);
}

.btn-play-again:disabled {
  opacity: 0.6;
  cursor: default;
  transform: none;
  box-shadow: 0 5px 0 var(--btn-shadow);
}

.corner-btn i {
  font-size: 1em;
  line-height: 1;
}

.corner-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 0 var(--shadow-press);
  color: var(--accent);
  border-color: var(--accent);
  background: var(--wood-light);
}

.corner-btn:active:not(:disabled) {
  transform: translateY(2px);
  box-shadow: 0 0 0 var(--shadow-press);
}

.corner-btn:disabled {
  opacity: 0.6;
  cursor: default;
  transform: none;
}

/* Level text on game screen – larger, with letter spacing */
.level-badge {
  font-size: 18px;
  font-weight: 800;
  color: var(--accent);
  background: transparent;
  border: none;
  padding: 0 6px;
  height: 44px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  line-height: 1;
  letter-spacing: 0.12em;
}

.level-badge #level-indicator {
  font-size: 1.15em;
  letter-spacing: 0.08em;
  margin-left: 2px;
}

/* Game container & canvas */
#game-container {
  position: relative;
  box-shadow:
    0 40px 80px -12px rgba(0, 0, 0, 0.9),
    0 10px 20px -5px rgba(0, 0, 0, 0.7);
  border-radius: 24px;
  background: var(--wood-mid);
  border: 8px solid var(--wood-dark);
  padding: 8px;
}

#gameCanvas {
  display: block;
  width: var(--canvas-width, 300px);
  height: var(--canvas-height, 300px);
  border-radius: 16px;
  background: #EED2A9;
}

#gameCanvas.canvas-shake {
  animation: canvas-shake 150ms ease-in-out;
}

@keyframes canvas-shake {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(2px, 0); }
  66% { transform: translate(-2px, 0); }
}

/* Modals – base */
[data-modal] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--modal-overlay);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 20;
  border-radius: 24px;
}

[data-modal].active {
  opacity: 1;
  pointer-events: all;
}

.info-modal {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--modal-overlay);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 25;
  border-radius: 24px;
}

.info-modal.active {
  opacity: 1;
  pointer-events: all;
}

/* Start modal – same background as game screen, no game visible behind */
#start-modal {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 30;
  border-radius: 24px;
  opacity: 1;
  pointer-events: all;
  transition: opacity 0.35s ease;
}

#start-modal.hidden {
  opacity: 0;
  pointer-events: none;
}

/* Modal content */
.modal-content {
  background: var(--wood-mid);
  padding: 40px 60px;
  border-radius: 20px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
  border: 2px solid var(--wood-border);
}

.modal-content--compact {
  padding: 14px 22px 18px;
}

.modal-title {
  color: var(--accent);
  margin: 0 0 10px 0;
  font-size: 32px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.modal-title--small {
  font-size: 24px;
  margin: 0 0 16px 0;
  letter-spacing: 0.06em;
}

.modal-text {
  color: var(--text-secondary);
  margin: 0;
  font-size: 15px;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.modal-text--small {
  font-size: 16px;
  line-height: 1.55;
  margin: 0 0 10px 0;
  letter-spacing: 0.03em;
  color: var(--text-color);
}

.modal-text--small:last-of-type {
  margin: 0 0 6px 0;
}

.modal-content--compact .btn-primary {
  margin-top: 12px;
}

/* Primary button */
.btn-primary {
  background: linear-gradient(135deg, var(--btn-gradient-start) 0%, var(--btn-gradient-end) 100%);
  color: var(--wood-mid);
  border: none;
  padding: 16px 40px;
  font-size: 18px;
  font-weight: 800;
  border-radius: 50px;
  cursor: pointer;
  margin-top: 24px;
  box-shadow: 0 6px 0 var(--btn-shadow);
  transition: transform 0.1s, box-shadow 0.1s;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 0 var(--btn-shadow);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(4px);
  box-shadow: 0 0 0 var(--btn-shadow);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: default;
  transform: none;
}

/* Start modal content */
.start-modal-content {
  background: linear-gradient(160deg, var(--wood-mid) 0%, var(--bg-color) 100%);
  padding: 36px 48px 32px;
  border-radius: 24px;
  text-align: center;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.9);
  border: 2px solid var(--wood-border);
  min-width: 260px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

.game-logo {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
  text-shadow: 0 4px 12px rgba(255, 179, 0, 0.4);
  letter-spacing: 0.12em;
  margin: 0 0 8px 0;
  line-height: 1.2;
}

.level-card {
  background: var(--wood-dark);
  border: 2px solid var(--wood-border);
  border-radius: 14px;
  padding: 14px 28px;
  margin: 20px 0 28px 0;
  display: block;
}

.level-card-label {
  font-size: 11px;
  color: var(--text-label);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 700;
  margin-bottom: 4px;
}

.level-card-value {
  font-size: 32px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.btn-play-now {
  background: linear-gradient(135deg, var(--btn-gradient-start) 0%, var(--btn-gradient-end) 100%);
  color: var(--wood-mid);
  border: none;
  padding: 18px 48px;
  font-size: 18px;
  font-weight: 800;
  border-radius: 50px;
  cursor: pointer;
  box-shadow: 0 6px 0 var(--btn-shadow);
  transition: transform 0.1s, box-shadow 0.1s;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.btn-play-now:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 0 var(--btn-shadow);
}

.btn-play-now:active {
  transform: translateY(4px);
  box-shadow: 0 0 0 var(--btn-shadow);
}

/* ============================================
   Responsive: Desktop (≥1025px) = current styles (no overrides).
   Below we scale for smaller viewports.
   ============================================ */

/* Tablet Landscape (769px - 1024px) */
@media (max-width: 1024px) {
  #game-wrapper {
    max-width: 420px;
    padding: 12px;
  }

  .corner-controls {
    top: 10px;
    gap: 6px;
  }

  .corner-controls--left {
    left: 10px;
  }

  .corner-controls--right {
    right: 10px;
  }

  .corner-btn {
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
    font-size: 16px;
    border-radius: 8px;
  }

  .level-badge {
    font-size: 16px;
    height: 40px;
  }

  .top-center-controls {
    top: 56px;
  }

  .btn-play-again {
    padding: 8px 24px;
    font-size: 14px;
  }

  #game-container {
    border-width: 6px;
    padding: 6px;
    border-radius: 20px;
  }

  #gameCanvas {
    border-radius: 14px;
  }

  .modal-content {
    padding: 32px 44px;
    border-radius: 18px;
  }

  .modal-content--compact {
    padding: 12px 18px 14px;
  }

  .modal-title {
    font-size: 28px;
  }

  .modal-title--small {
    font-size: 22px;
  }

  .modal-text {
    font-size: 14px;
  }

  .modal-text--small {
    font-size: 15px;
  }

  .btn-primary {
    padding: 14px 32px;
    font-size: 16px;
    margin-top: 20px;
  }

  .start-modal-content {
    padding: 28px 36px 26px;
    border-radius: 20px;
    min-width: 220px;
  }

  .game-logo {
    font-size: 30px;
  }

  .level-card {
    padding: 12px 22px;
    margin: 16px 0 22px 0;
    border-radius: 12px;
  }

  .level-card-value {
    font-size: 28px;
  }

  .btn-play-now {
    padding: 14px 36px;
    font-size: 16px;
  }
}

/* Tablet Portrait (641px - 768px) */
@media (max-width: 768px) {
  #game-wrapper {
    max-width: 380px;
    padding: 10px;
  }

  .corner-controls {
    top: 8px;
    gap: 5px;
  }

  .corner-controls--left {
    left: 8px;
  }

  .corner-controls--right {
    right: 8px;
  }

  .corner-btn {
    width: 38px;
    height: 38px;
    min-width: 38px;
    min-height: 38px;
    font-size: 15px;
    border-radius: 8px;
  }

  .level-badge {
    font-size: 15px;
    height: 38px;
  }

  .top-center-controls {
    top: 52px;
  }

  .btn-play-again {
    padding: 8px 20px;
    font-size: 13px;
  }

  #game-container {
    border-width: 6px;
    padding: 6px;
    border-radius: 18px;
  }

  #gameCanvas {
    border-radius: 12px;
  }

  .modal-content {
    padding: 28px 36px;
    border-radius: 16px;
  }

  .modal-content--compact {
    padding: 12px 16px 12px;
  }

  .modal-title {
    font-size: 26px;
  }

  .modal-title--small {
    font-size: 20px;
  }

  .modal-text {
    font-size: 14px;
  }

  .modal-text--small {
    font-size: 14px;
  }

  .btn-primary {
    padding: 12px 28px;
    font-size: 15px;
    margin-top: 18px;
  }

  .start-modal-content {
    padding: 24px 28px 22px;
    border-radius: 18px;
    min-width: 200px;
  }

  .game-logo {
    font-size: 28px;
  }

  .level-card {
    padding: 10px 20px;
    margin: 14px 0 18px 0;
    border-radius: 12px;
  }

  .level-card-value {
    font-size: 26px;
  }

  .btn-play-now {
    padding: 12px 32px;
    font-size: 15px;
  }
}

/* Mobile (≤640px) */
@media (max-width: 640px) {
  body {
    min-height: 100vh;
    min-height: 100dvh;
  }

  #game-wrapper {
    max-width: 100%;
    padding: 8px;
    box-sizing: border-box;
  }

  .corner-controls {
    top: 6px;
    gap: 4px;
  }

  .corner-controls--left {
    left: 6px;
  }

  .corner-controls--right {
    right: 6px;
  }

  .corner-btn {
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
    font-size: 16px;
    border-radius: 10px;
  }

  .level-badge {
    font-size: 14px;
    height: 40px;
    padding: 0 4px;
  }

  .top-center-controls {
    top: 52px;
  }

  .btn-play-again {
    padding: 8px 20px;
    font-size: 13px;
  }

  #game-container {
    border-width: 5px;
    padding: 5px;
    border-radius: 16px;
  }

  #gameCanvas {
    border-radius: 12px;
  }

  .modal-content {
    padding: 24px 28px;
    border-radius: 14px;
  }

  .modal-content--compact {
    padding: 10px 14px 12px;
  }

  .modal-title {
    font-size: 24px;
  }

  .modal-title--small {
    font-size: 18px;
  }

  .modal-text {
    font-size: 13px;
  }

  .modal-text--small {
    font-size: 13px;
  }

  .btn-primary {
    padding: 12px 24px;
    font-size: 14px;
    margin-top: 16px;
  }

  .start-modal-content {
    padding: 20px 24px 18px;
    border-radius: 16px;
    min-width: 0;
    width: calc(100% - 24px);
    max-width: 320px;
  }

  .game-logo {
    font-size: 26px;
  }

  .level-card {
    padding: 10px 18px;
    margin: 12px 0 16px 0;
    border-radius: 10px;
  }

  .level-card-value {
    font-size: 24px;
  }

  .btn-play-now {
    padding: 12px 28px;
    font-size: 14px;
  }
}

/* Small Mobile (≤480px) */
@media (max-width: 480px) {
  #game-wrapper {
    padding: 6px;
  }

  .corner-controls {
    top: 4px;
    gap: 3px;
  }

  .corner-controls--left {
    left: 4px;
  }

  .corner-controls--right {
    right: 4px;
  }

  .corner-btn {
    width: 36px;
    height: 36px;
    min-width: 36px;
    min-height: 36px;
    font-size: 14px;
    border-radius: 8px;
  }

  .level-badge {
    font-size: 12px;
    height: 36px;
    padding: 0 2px;
  }

  .level-badge #level-indicator {
    font-size: 1.1em;
  }

  .top-center-controls {
    top: 46px;
  }

  .btn-play-again {
    padding: 6px 16px;
    font-size: 12px;
  }

  #game-container {
    border-width: 4px;
    padding: 4px;
    border-radius: 14px;
  }

  #gameCanvas {
    border-radius: 10px;
  }

  .modal-content {
    padding: 20px 20px;
    border-radius: 12px;
  }

  .modal-content--compact {
    padding: 10px 12px 10px;
  }

  .modal-title {
    font-size: 22px;
  }

  .modal-title--small {
    font-size: 16px;
  }

  .modal-text {
    font-size: 12px;
  }

  .modal-text--small {
    font-size: 12px;
  }

  .btn-primary {
    padding: 10px 20px;
    font-size: 13px;
    margin-top: 14px;
  }

  .start-modal-content {
    padding: 16px 18px 14px;
    border-radius: 14px;
    max-width: 280px;
  }

  .game-logo {
    font-size: 22px;
  }

  .level-card {
    padding: 8px 14px;
    margin: 10px 0 12px 0;
    border-radius: 10px;
  }

  .level-card-label {
    font-size: 10px;
  }

  .level-card-value {
    font-size: 22px;
  }

  .btn-play-now {
    padding: 10px 24px;
    font-size: 13px;
  }
}

/* Landscape Mobile / Short viewport (orientation: landscape, limited height) */
@media (orientation: landscape) and (max-height: 500px) {
  body {
    min-height: auto;
    padding: 4px 0;
  }

  #game-wrapper {
    padding: 4px;
    max-width: 100%;
  }

  .corner-controls {
    top: 4px;
    gap: 3px;
  }

  .corner-controls--left {
    left: 4px;
  }

  .corner-controls--right {
    right: 4px;
  }

  .corner-btn {
    width: 34px;
    height: 34px;
    min-width: 34px;
    min-height: 34px;
    font-size: 13px;
    border-radius: 8px;
  }

  .level-badge {
    font-size: 11px;
    height: 34px;
  }

  .top-center-controls {
    top: 42px;
  }

  .btn-play-again {
    padding: 6px 14px;
    font-size: 11px;
  }

  #game-container {
    border-width: 4px;
    padding: 4px;
    border-radius: 12px;
  }

  #gameCanvas {
    border-radius: 10px;
  }

  .modal-content {
    padding: 16px 20px;
    border-radius: 12px;
  }

  .modal-content--compact {
    padding: 8px 12px 8px;
  }

  .modal-title {
    font-size: 20px;
  }

  .modal-title--small {
    font-size: 15px;
  }

  .modal-text,
  .modal-text--small {
    font-size: 12px;
  }

  .btn-primary {
    padding: 8px 18px;
    font-size: 12px;
    margin-top: 10px;
  }

  .start-modal-content {
    padding: 12px 16px 12px;
    border-radius: 12px;
    min-width: 0;
    max-width: 260px;
  }

  .game-logo {
    font-size: 20px;
  }

  .level-card {
    padding: 6px 12px;
    margin: 8px 0 10px 0;
    border-radius: 8px;
  }

  .level-card-label {
    font-size: 9px;
  }

  .level-card-value {
    font-size: 20px;
  }

  .btn-play-now {
    padding: 8px 20px;
    font-size: 12px;
  }
}

/* Extra small landscape (very short) */
@media (orientation: landscape) and (max-height: 400px) {
  .corner-btn {
    width: 32px;
    height: 32px;
    min-width: 32px;
    min-height: 32px;
    font-size: 12px;
  }

  .level-badge {
    font-size: 10px;
    height: 32px;
  }

  .top-center-controls {
    top: 40px;
  }
}