@import url("https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Inter:wght@300;400;500;600;700&display=swap");

/* ================================================================
   SC Jigsaw — Light/Dark Adaptive, Full-Width
   ================================================================ */

/* ---- CSS Variables: LIGHT mode defaults ---- */
#scdev-jigsaw-root {
  --jig-bg: #ffffff;
  --jig-surface: #ffffff;
  --jig-text: #333333;
  --jig-muted: #555555;
  --jig-glass: rgba(0, 0, 0, 0.04);
  --jig-glass-b: rgba(0, 0, 0, 0.10);
  --jig-board-fill: rgba(0, 0, 0, 0.02);
  --jig-board-stroke: rgba(0, 0, 0, 0.12);
  --jig-grid: rgba(0, 0, 0, 0.06);
  --jig-tray-line: rgba(0, 0, 0, 0.08);
  --jig-tray-label: rgba(0, 0, 0, 0.20);
  --jig-hud-bg: rgba(240, 242, 247, 0.90);
  --jig-hud-border: rgba(0, 0, 0, 0.08);
  --jig-progress-bg: rgba(0, 0, 0, 0.08);
  --jig-shadow: rgba(0, 0, 0, 0.15);
  --jig-purple: #7c3aed;
  --jig-cyan: #06b6d4;
  --jig-drag-glow: rgba(124, 58, 237, 0.85);
  --jig-snap-glow: rgba(6, 182, 212, 0.85);
}

/* ---- DARK mode (system preference) ---- */
@media (prefers-color-scheme: dark) {
  #scdev-jigsaw-root {
    --jig-bg: #07071a;
    --jig-surface: #0e0e2a;
    --jig-text: #eeeeff;
    --jig-muted: #7777aa;
    --jig-glass: rgba(255, 255, 255, 0.04);
    --jig-glass-b: rgba(255, 255, 255, 0.09);
    --jig-board-fill: rgba(255, 255, 255, 0.025);
    --jig-board-stroke: rgba(255, 255, 255, 0.15);
    --jig-grid: rgba(255, 255, 255, 0.07);
    --jig-tray-line: rgba(255, 255, 255, 0.06);
    --jig-tray-label: rgba(255, 255, 255, 0.14);
    --jig-hud-bg: rgba(7, 7, 26, 0.88);
    --jig-hud-border: rgba(255, 255, 255, 0.09);
    --jig-progress-bg: rgba(255, 255, 255, 0.06);
    --jig-shadow: rgba(0, 0, 0, 0.60);
  }
}

/* ---- Force dark if JS adds .jig-dark (theme class detection) ---- */
#scdev-jigsaw-root.jig-dark {
  --jig-bg: #07071a;
  --jig-surface: #0e0e2a;
  --jig-text: #eeeeff;
  --jig-muted: #7777aa;
  --jig-glass: rgba(255, 255, 255, 0.04);
  --jig-glass-b: rgba(255, 255, 255, 0.09);
  --jig-board-fill: rgba(255, 255, 255, 0.025);
  --jig-board-stroke: rgba(255, 255, 255, 0.15);
  --jig-grid: rgba(255, 255, 255, 0.07);
  --jig-tray-line: rgba(255, 255, 255, 0.06);
  --jig-tray-label: rgba(255, 255, 255, 0.14);
  --jig-hud-bg: rgba(7, 7, 26, 0.88);
  --jig-hud-border: rgba(255, 255, 255, 0.09);
  --jig-progress-bg: rgba(255, 255, 255, 0.06);
  --jig-shadow: rgba(0, 0, 0, 0.60);
}

/* ---- Force light if JS adds .jig-light ---- */
#scdev-jigsaw-root.jig-light {
  --jig-bg: #ffffff;
  --jig-surface: #ffffff;
  --jig-text: #333333;
  --jig-muted: #555555;
  --jig-glass: rgba(0, 0, 0, 0.04);
  --jig-glass-b: rgba(0, 0, 0, 0.10);
  --jig-board-fill: rgba(0, 0, 0, 0.02);
  --jig-board-stroke: rgba(0, 0, 0, 0.12);
  --jig-grid: rgba(0, 0, 0, 0.06);
  --jig-tray-line: rgba(0, 0, 0, 0.08);
  --jig-tray-label: rgba(0, 0, 0, 0.20);
  --jig-hud-bg: rgba(240, 242, 247, 0.90);
  --jig-hud-border: rgba(0, 0, 0, 0.08);
  --jig-progress-bg: rgba(0, 0, 0, 0.08);
  --jig-shadow: rgba(0, 0, 0, 0.15);
}

/* ================================================================
   ROOT CONTAINER — full theme width, tall play area
   ================================================================ */
#scdev-jigsaw-root {
  position: relative;
  width: 100%;
  height: 88vh;
  min-height: 560px;
  background: var(--jig-bg);
  overflow: hidden;
  font-family: "Inter", sans-serif;
  color: var(--jig-text);
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  box-sizing: border-box;
  transition: background 0.4s ease, color 0.4s ease;
  border-radius: 4px;
}

/* Ambient glow (adapts with opacity in light) */
#scdev-jigsaw-root::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 40% at 20% 20%, rgba(124, 58, 237, 0.10) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 80% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 70%);
  z-index: 0;
}

#scdev-jigsaw-root.jig-light::before {
  background:
    radial-gradient(ellipse 60% 40% at 20% 20%, rgba(124, 58, 237, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 80% 80%, rgba(6, 182, 212, 0.05) 0%, transparent 70%);
}

/* ================================================================
   SCREENS
   ================================================================ */
#scdev-jigsaw-root .screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1;
  opacity: 0;
  transform: scale(0.97);
  pointer-events: none;
  transition: opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1), transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 1rem;
}

#scdev-jigsaw-root .screen.active {
  opacity: 1;
  transform: scale(1);
  pointer-events: all;
}

#scdev-jigsaw-root .inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 600px;
}

/* ================================================================
   BRAND
   ================================================================ */
#scdev-jigsaw-root .brand {
  font-family: "Orbitron", sans-serif;
  font-size: clamp(1.8rem, 5vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -1px;
  line-height: 1;
  margin-bottom: 0.4rem;
  text-align: center;
}

#scdev-jigsaw-root .brand-sc {
  color: var(--jig-purple);
  text-shadow: 0 0 20px rgba(124, 58, 237, 0.5);
}

#scdev-jigsaw-root .brand-dev {
  color: var(--jig-cyan);
  text-shadow: 0 0 20px rgba(6, 182, 212, 0.5);
}

#scdev-jigsaw-root .brand-game {
  display: block;
  font-size: 0.38em;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--jig-muted);
  margin-top: 0.12em;
}

#scdev-jigsaw-root .tagline {
  color: var(--jig-muted);
  font-size: 0.9rem;
  font-weight: 300;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
  text-align: center;
}

/* ================================================================
   UPLOAD ZONE
   ================================================================ */
#scdev-jigsaw-root .upload-zone {
  width: 100%;
  border: 2px dashed var(--jig-glass-b);
  border-radius: 14px;
  padding: 2rem 1.5rem;
  text-align: center;
  cursor: pointer;
  background: var(--jig-glass);
  transition: border-color 0.3s, background 0.3s, box-shadow 0.3s;
  margin-bottom: 1.5rem;
}

#scdev-jigsaw-root .upload-zone:hover,
#scdev-jigsaw-root .upload-zone.drag-over {
  border-color: var(--jig-purple);
  background: rgba(124, 58, 237, 0.08);
  box-shadow: 0 0 30px rgba(124, 58, 237, 0.15), inset 0 0 30px rgba(124, 58, 237, 0.04);
}

#scdev-jigsaw-root .upload-icon {
  font-size: 2.8rem;
  margin-bottom: 0.65rem;
  animation: scjig-float 3s ease-in-out infinite;
  display: block;
}

@keyframes scjig-float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-7px);
  }
}

#scdev-jigsaw-root .upload-main {
  font-size: 1rem;
  font-weight: 600;
  color: var(--jig-text);
  margin-bottom: 0.25rem;
}

#scdev-jigsaw-root .upload-sub {
  font-size: 0.82rem;
  color: var(--jig-muted);
}

/* ================================================================
   SAMPLES — ALL 6 ON ONE ROW, FULL WIDTH
   ================================================================ */
#scdev-jigsaw-root .samples-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--jig-muted);
  margin-bottom: 0.6rem;
  text-align: center;
}

#scdev-jigsaw-root .samples-grid {
  display: flex;
  gap: 0.5rem;
  width: 100%;
  flex-wrap: nowrap;
  /* stay on one line */
}

#scdev-jigsaw-root .sample-thumb {
  flex: 1 1 0;
  min-width: 0;
  height: 65px;
  border-radius: 8px;
  object-fit: cover;
  cursor: pointer;
  border: 2px solid var(--jig-glass-b);
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
  display: block;
}

#scdev-jigsaw-root .sample-thumb:hover {
  border-color: var(--jig-cyan);
  transform: scale(1.06);
  box-shadow: 0 0 18px rgba(6, 182, 212, 0.4);
}

/* ================================================================
   DIFFICULTY SCREEN
   ================================================================ */
#scdev-jigsaw-root .diff-preview {
  border-radius: 10px;
  object-fit: cover;
  margin-bottom: 1.1rem;
  border: 2px solid var(--jig-glass-b);
  box-shadow: 0 6px 30px var(--jig-shadow);
  display: block;
  max-width: 160px;
}

#scdev-jigsaw-root .diff-title {
  font-family: "Orbitron", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--jig-muted);
  margin-bottom: 1rem;
}

#scdev-jigsaw-root .diff-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.55rem;
  width: 100%;
  margin-bottom: 1.1rem;
}

#scdev-jigsaw-root .diff-btn {
  background: var(--jig-glass);
  border: 1.5px solid var(--jig-glass-b);
  border-radius: 10px;
  color: var(--jig-text);
  font-family: "Inter", sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.6rem 0.4rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.18rem;
}

#scdev-jigsaw-root .diff-btn .pieces-count {
  font-size: 0.65rem;
  color: var(--jig-muted);
  font-weight: 400;
}

#scdev-jigsaw-root .diff-btn:hover,
#scdev-jigsaw-root .diff-btn.selected {
  border-color: var(--jig-purple);
  background: rgba(124, 58, 237, 0.12);
  box-shadow: 0 0 18px rgba(124, 58, 237, 0.2);
  color: var(--jig-purple);
}

#scdev-jigsaw-root .diff-btn.selected .pieces-count {
  color: rgba(124, 58, 237, 0.7);
}

/* ================================================================
   BUTTONS
   ================================================================ */
#scdev-jigsaw-root .btn-primary {
  padding: 0.8rem 2.2rem;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  font-family: "Orbitron", sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--jig-purple), var(--jig-cyan));
  color: #fff;
  box-shadow: 0 4px 24px rgba(124, 58, 237, 0.35);
  transition: transform 0.3s, box-shadow 0.3s;
}

#scdev-jigsaw-root .btn-primary:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 36px rgba(124, 58, 237, 0.55);
}

#scdev-jigsaw-root .btn-primary:active {
  transform: scale(0.98);
}

#scdev-jigsaw-root .btn-ghost {
  padding: 0.55rem 1.4rem;
  border-radius: 50px;
  border: 1.5px solid var(--jig-glass-b);
  cursor: pointer;
  font-family: "Inter", sans-serif;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  background: transparent;
  color: var(--jig-muted);
  margin-top: 0.6rem;
  transition: all 0.3s ease;
}

#scdev-jigsaw-root .btn-ghost:hover {
  border-color: var(--jig-muted);
  color: var(--jig-text);
  background: var(--jig-glass);
}

/* ================================================================
   GAME SCREEN
   ================================================================ */
#scdev-jigsaw-root #screen-game {
  padding: 0;
  justify-content: flex-start;
}

#scdev-jigsaw-root #gameCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  cursor: default;
  touch-action: none;
  display: block;
}

/* HUD */
#scdev-jigsaw-root .game-hud {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
  background: var(--jig-hud-bg);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--jig-hud-border);
  z-index: 10;
  transition: background 0.4s ease;
}

#scdev-jigsaw-root .hud-brand {
  font-family: "Orbitron", sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--jig-text);
}

#scdev-jigsaw-root .hud-brand .sc {
  color: var(--jig-purple);
}

#scdev-jigsaw-root .hud-brand .dev {
  color: var(--jig-cyan);
}

#scdev-jigsaw-root .hud-stats {
  display: flex;
  gap: 1rem;
  align-items: center;
}

#scdev-jigsaw-root .hud-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.2;
}

#scdev-jigsaw-root .hud-label {
  font-size: 0.54rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--jig-muted);
}

#scdev-jigsaw-root .hud-value {
  font-family: "Orbitron", sans-serif;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--jig-text);
}

#scdev-jigsaw-root .hud-actions {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}

#scdev-jigsaw-root .hud-icon-btn {
  background: var(--jig-glass);
  border: 1px solid var(--jig-glass-b);
  border-radius: 7px;
  color: var(--jig-muted);
  cursor: pointer;
  padding: 0.3rem 0.6rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: all 0.3s ease;
  font-family: "Inter", sans-serif;
}

#scdev-jigsaw-root .hud-icon-btn:hover {
  border-color: var(--jig-purple);
  color: var(--jig-text);
  background: rgba(124, 58, 237, 0.12);
}

#scdev-jigsaw-root .hud-icon-btn.active {
  border-color: var(--jig-cyan);
  color: var(--jig-cyan);
  background: rgba(6, 182, 212, 0.1);
}

#scdev-jigsaw-root .progress-wrap {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--jig-progress-bg);
  z-index: 10;
}

#scdev-jigsaw-root .progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--jig-purple), var(--jig-cyan));
  transition: width 0.4s ease;
  box-shadow: 0 0 6px var(--jig-cyan);
}

/* ================================================================
   WIN SCREEN
   ================================================================ */
#scdev-jigsaw-root #screen-win .inner {
  background: var(--jig-surface);
  backdrop-filter: blur(20px);
  border: 1px solid var(--jig-glass-b);
  border-radius: 22px;
  box-shadow: 0 20px 70px var(--jig-shadow), 0 0 50px rgba(124, 58, 237, 0.15);
  text-align: center;
  padding: 2.5rem 2rem;
  max-width: 380px;
}

#scdev-jigsaw-root .win-emoji {
  font-size: 3.5rem;
  margin-bottom: 0.75rem;
  animation: scjig-pop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
  display: block;
}

@keyframes scjig-pop {
  from {
    transform: scale(0);
    opacity: 0;
  }

  to {
    transform: scale(1);
    opacity: 1;
  }
}

#scdev-jigsaw-root .win-title {
  font-family: "Orbitron", sans-serif;
  font-size: 1.75rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--jig-purple), var(--jig-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.35rem;
}

#scdev-jigsaw-root .win-sub {
  color: var(--jig-muted);
  font-size: 0.88rem;
  margin-bottom: 1.5rem;
}

#scdev-jigsaw-root .win-stats {
  display: flex;
  gap: 1.75rem;
  margin-bottom: 1.75rem;
}

#scdev-jigsaw-root .win-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
}

#scdev-jigsaw-root .win-stat-value {
  font-family: "Orbitron", sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--jig-text);
}

#scdev-jigsaw-root .win-stat-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--jig-muted);
}

#scdev-jigsaw-root .win-actions {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* Confetti */
#scdev-jigsaw-root #confettiCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 100;
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 600px) {
  #scdev-jigsaw-root {
    height: 92vh;
  }

  #scdev-jigsaw-root .diff-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  #scdev-jigsaw-root .hud-stats {
    gap: 0.6rem;
  }

  #scdev-jigsaw-root .win-stats {
    gap: 1rem;
  }

  #scdev-jigsaw-root .sample-thumb {
    height: 50px;
  }
}