/* =========================================================
   Pixel Art Generator — Full Stylesheet
   ========================================================= */

/* ---- Reset & Base ---- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0e0e12;
  --surface: #18181f;
  --surface-2: #1f1f2a;
  --border: #2a2a3a;
  --text: #e2e2ef;
  --text-dim: #8888a0;
  --accent: #00eeff;
  --accent-glow: rgba(0, 238, 255, 0.25);
  --danger: #ff4466;
  --radius: 10px;
  --radius-sm: 6px;
  --font: 'Inter', system-ui, sans-serif;
  --font-pixel: 'Press Start 2P', monospace;
  --transition: 0.2s ease;
}

html {
  font-size: 16px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px;
  cursor: default;
}

button {
  cursor: pointer;
  font-family: var(--font);
}

/* ---- Header Toolbar ---- */
.header {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 14px;
  width: 100%;
  max-width: 820px;
  flex-wrap: wrap;
  justify-content: center;
}

.header-btn {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--text);
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.header-btn:hover {
  background: var(--border);
  border-color: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

.color-picker {
  width: 36px;
  height: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  cursor: pointer;
  padding: 2px;
}

.grid-count {
  width: 52px;
  height: 28px;
  text-align: center;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--text);
}

.image-upload {
  font-size: 0.7rem;
  color: var(--text-dim);
  max-width: 140px;
}

.image-upload::file-selector-button {
  font-family: var(--font);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--text);
  cursor: pointer;
  margin-right: 6px;
  transition: background var(--transition);
}

.image-upload::file-selector-button:hover {
  background: var(--border);
}

/* ---- Canvas Wrapper ---- */
.canvas-wrapper {
  position: relative;
  width: 100%;
  max-width: 800px;
  aspect-ratio: 1 / 1;
  margin-top: 20px;
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
  box-shadow: 0 0 40px rgba(0, 238, 255, 0.06);
}

.container {
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, 1fr);
  background: #000;
  gap: 1px;
}

.pixel {
  background-color: rgb(61, 61, 61);
  border-radius: 2px;
  display: block;
}

/* ---- Frame Overlay ---- */
.frame-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 5;
}

/* Frame: Arcade */
.frame-overlay.arcade {
  border: 12px solid transparent;
  border-image: repeating-linear-gradient(
    90deg,
    #ff00ff 0 8px,
    #00ffff 8px 16px,
    #ffff00 16px 24px
  ) 12;
  box-shadow:
    inset 0 0 30px rgba(255, 0, 255, 0.3),
    inset 0 0 60px rgba(0, 255, 255, 0.15);
}

.frame-overlay.arcade::before {
  content: 'INSERT COIN ▶';
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-pixel);
  font-size: 10px;
  color: #ffff00;
  text-shadow: 0 0 8px #ffff00;
  letter-spacing: 2px;
  animation: blink-text 1s steps(2) infinite;
}

@keyframes blink-text {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* Frame: VHS */
.frame-overlay.vhs {
  border: 6px solid rgba(255, 255, 255, 0.08);
  background:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(255, 255, 255, 0.03) 2px,
      rgba(255, 255, 255, 0.03) 4px
    );
  box-shadow: inset 0 0 80px rgba(0, 0, 0, 0.5);
}

.frame-overlay.vhs::before {
  content: '▶ REC';
  position: absolute;
  top: 16px;
  left: 18px;
  font-family: var(--font-pixel);
  font-size: 10px;
  color: #ff3333;
  text-shadow: 0 0 6px #ff3333;
  animation: blink-text 1.2s steps(2) infinite;
}

.frame-overlay.vhs::after {
  content: '00:03:27';
  position: absolute;
  top: 16px;
  right: 18px;
  font-family: var(--font-pixel);
  font-size: 10px;
  color: rgba(255, 255, 255, 0.5);
}

/* Frame: Glam */
.frame-overlay.glam {
  border: 10px solid transparent;
  border-image: linear-gradient(
    135deg,
    #f9d423, #ff4e50, #f9d423, #e91e63, #f9d423
  ) 10;
  box-shadow:
    inset 0 0 50px rgba(249, 212, 35, 0.15),
    inset 0 0 100px rgba(255, 78, 80, 0.08);
}

.frame-overlay.glam::before,
.frame-overlay.glam::after {
  position: absolute;
  font-size: 20px;
  filter: drop-shadow(0 0 6px rgba(249, 212, 35, 0.6));
}

.frame-overlay.glam::before {
  content: '✦ ✧ ✦';
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  letter-spacing: 8px;
}

.frame-overlay.glam::after {
  content: '✧ ✦ ✧';
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  letter-spacing: 8px;
}

/* Frame: Circuit */
.frame-overlay.circuit {
  border: 8px solid #0f0;
  box-shadow:
    inset 0 0 20px rgba(0, 255, 0, 0.15),
    0 0 15px rgba(0, 255, 0, 0.1);
}

.frame-overlay.circuit::before {
  content: '';
  position: absolute;
  inset: 4px;
  border: 1px dashed rgba(0, 255, 0, 0.3);
  pointer-events: none;
}

.frame-overlay.circuit::after {
  content: '⚡ SYS.ONLINE';
  position: absolute;
  bottom: 10px;
  right: 14px;
  font-family: var(--font-pixel);
  font-size: 8px;
  color: #0f0;
  text-shadow: 0 0 6px #0f0;
  letter-spacing: 1px;
}

/* ---- Countdown Overlay ---- */
.countdown-overlay {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 10;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(2px);
}

.countdown-overlay.active {
  display: flex;
}

.countdown-overlay .countdown-num {
  font-family: var(--font-pixel);
  font-size: 6rem;
  color: #fff;
  text-shadow:
    0 0 30px var(--accent),
    0 0 60px var(--accent);
  animation: countdown-pop 0.6s ease-out;
}

@keyframes countdown-pop {
  0% {
    transform: scale(2.5);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Flash effect */
.canvas-wrapper.flash::after {
  content: '';
  position: absolute;
  inset: 0;
  background: #fff;
  z-index: 20;
  animation: flash-fade 0.4s ease-out forwards;
}

@keyframes flash-fade {
  0% { opacity: 0.9; }
  100% { opacity: 0; }
}

/* ---- Capture Canvas (frozen image) ---- */
.capture-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 4;
  display: none;
}

.capture-canvas.visible {
  display: block;
}

/* ---- Tab Panel ---- */
.tab-panel {
  width: 100%;
  max-width: 800px;
  margin-top: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  overflow: hidden;
}

.tab-bar {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  flex: 1;
  padding: 12px 0;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  transition: color var(--transition), border-color var(--transition);
  position: relative;
}

.tab-btn:hover {
  color: var(--text);
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-content {
  display: none;
  padding: 20px 24px;
  animation: tab-fade-in 0.25s ease;
}

.tab-content.active {
  display: block;
}

@keyframes tab-fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- Adjust Tab ---- */
.adjust-section {
  margin-bottom: 20px;
}

.adjust-section:last-child {
  margin-bottom: 0;
}

.adjust-label {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-dim);
  margin-bottom: 10px;
}

/* Range slider */
.pixel-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--surface-2);
  border-radius: 3px;
  outline: none;
}

.pixel-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
  cursor: pointer;
  transition: transform var(--transition);
}

.pixel-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.pixel-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
  cursor: pointer;
  border: none;
}

/* Palette buttons */
.palette-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.palette-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.palette-btn:hover {
  border-color: var(--accent);
  color: var(--text);
}

.palette-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.palette-preview {
  display: inline-flex;
  width: 16px;
  height: 16px;
  border-radius: 3px;
  flex-shrink: 0;
}

.palette-preview.original {
  background: linear-gradient(135deg, #ff6b6b, #48dbfb, #feca57, #1dd1a1);
}

.palette-preview.gameboy {
  background: linear-gradient(135deg, #0f380f, #306230, #8bac0f, #9bbc0f);
}

.palette-preview.synthwave {
  background: linear-gradient(135deg, #0d0221, #ff2975, #00fff0, #ffe156);
}

.palette-preview.c64 {
  background: linear-gradient(135deg, #000000, #6c5eb5, #68a941, #b8c76f);
}

.palette-preview.neon {
  background: linear-gradient(135deg, #ff00ff, #00ff00, #ff6600, #00ffff);
}

.palette-preview.ash {
  background: linear-gradient(135deg, #2a2d35, #5a5f6e, #8b9099, #c5c9d1);
}

/* ---- Frames Tab ---- */
.frames-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.frame-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 14px 8px;
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.frame-btn:hover {
  border-color: var(--accent);
  color: var(--text);
}

.frame-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.frame-icon {
  font-size: 1.4rem;
}

/* ---- Capture Tab ---- */
.capture-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 10px 0;
}

.big-capture-btn {
  position: relative;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 3px solid var(--accent);
  background: transparent;
  cursor: pointer;
  transition: box-shadow var(--transition), transform var(--transition);
}

.big-capture-btn:hover {
  box-shadow: 0 0 24px var(--accent-glow);
  transform: scale(1.05);
}

.big-capture-btn:active {
  transform: scale(0.95);
}

.capture-ring {
  position: absolute;
  inset: 4px;
  border: 2px solid rgba(0, 238, 255, 0.3);
  border-radius: 50%;
}

.capture-dot {
  position: absolute;
  inset: 10px;
  background: var(--accent);
  border-radius: 50%;
  transition: background var(--transition);
}

.big-capture-btn:hover .capture-dot {
  background: #fff;
  box-shadow: 0 0 16px var(--accent);
}

.capture-hint {
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.06em;
}

.download-capture-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 28px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--bg);
  background: var(--accent);
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 0 20px var(--accent-glow);
}

.download-capture-btn:hover {
  background: #fff;
  box-shadow: 0 0 30px var(--accent-glow);
  transform: translateY(-1px);
}

.download-capture-btn.hidden {
  display: none;
}

/* ---- Camera Modal (legacy) ---- */
.camera-modal {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--surface);
  padding: 20px;
  z-index: 100;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.camera-feed {
  width: 400px;
  height: 300px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.camera-controls {
  display: flex;
  gap: 10px;
}

.camera-controls button {
  padding: 6px 16px;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  color: var(--text);
  cursor: pointer;
}

/* ---- Glitch Toggle ---- */
.glitch-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  width: 100%;
}

.glitch-toggle:hover {
  border-color: var(--accent);
  color: var(--text);
}

.glitch-toggle.active {
  border-color: #ff2975;
  color: #ff2975;
  box-shadow: 0 0 14px rgba(255, 41, 117, 0.3);
}

.glitch-toggle .glitch-status {
  font-family: var(--font-pixel);
  font-size: 0.55rem;
  padding: 2px 6px;
  border-radius: 3px;
  background: var(--border);
  color: var(--text-dim);
}

.glitch-toggle.active .glitch-status {
  background: #ff2975;
  color: #fff;
}

/* ---- Responsive ---- */
@media (max-width: 840px) {
  .canvas-wrapper {
    max-width: calc(100vw - 32px);
  }

  .tab-panel {
    max-width: calc(100vw - 32px);
  }

  .header {
    max-width: calc(100vw - 32px);
  }

  .palette-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .frames-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}