/* ---------- Theme Variables ---------- */

:root {
  --bg1: #3b82f6;
  --bg2: #ec4899;
  --accent: #38bdf8;
  --accent2: #a855f7;
  --panel-border: rgba(30, 64, 175, 0.45);
  --primary-btn-from: #3b82f6;
  --primary-btn-to: #22c55e;
}

/* Pastel theme */
body[data-theme="pastel"] {
  --bg1: #a5b4fc;
  --bg2: #f9a8d4;
  --accent: #6366f1;
  --accent2: #ec4899;
  --panel-border: rgba(148, 163, 184, 0.55);
  --primary-btn-from: #6366f1;
  --primary-btn-to: #f97316;
}

/* Forest theme */
body[data-theme="forest"] {
  --bg1: #22c55e;
  --bg2: #0f172a;
  --accent: #4ade80;
  --accent2: #22c55e;
  --panel-border: rgba(34, 197, 94, 0.5);
  --primary-btn-from: #16a34a;
  --primary-btn-to: #22c55e;
}

/* ---------- Base Layout ---------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  color: #f8fafc;
  background:
    radial-gradient(circle at top, var(--bg1) 0, transparent 55%),
    radial-gradient(circle at bottom, var(--bg2) 0, #020617 55%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.app-shell {
  width: 100%;
  max-width: 1200px;
  background: rgba(15, 23, 42, 0.92);
  border-radius: 24px;
  padding: 28px 32px 24px;
  box-shadow:
    0 24px 80px rgba(0, 0, 0, 0.7),
    0 0 0 1px rgba(148, 163, 184, 0.15);
  backdrop-filter: blur(22px);
}

.hidden {
  display: none !important;
}

/* ---------- Header ---------- */

.header {
  margin-bottom: 18px;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.header-actions {
  display: flex;
  gap: 8px;
}

.header .title-row {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  gap: 8px;
}

header h1 {
  font-size: 2.4rem;
  letter-spacing: 0.04em;
  margin: 0;
  background: linear-gradient(120deg, #e5e7eb, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  color: transparent;
}

.title-emoji {
  font-size: 2.2rem;
}

.subtitle {
  margin: 6px 0 0;
  color: #9ca3af;
  font-size: 0.95rem;
}

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

.top-bar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 22px;
}

.pill {
  flex: 1;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.35);
  font-size: 0.9rem;
  color: #e5e7eb;
  display: flex;
  justify-content: center;
  gap: 6px;
}

.pill span {
  font-weight: 600;
  color: var(--accent);
}

/* ---------- Board Layout ---------- */

.board {
  display: grid;
  grid-template-columns: 1.1fr 1.2fr 1.1fr;
  gap: 18px;
  margin-bottom: 18px;
}

.player-area,
.center-area {
  border-radius: 20px;
  padding: 18px 18px 16px;
  background: linear-gradient(
      135deg,
      rgba(15, 23, 42, 0.98),
      rgba(15, 23, 42, 0.9)
    );
  border: 1px solid var(--panel-border);
  box-shadow: 0 14px 40px rgba(15, 23, 42, 0.9);
  position: relative;
}

.player-area h2,
.center-area h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #e5e7eb;
}

.you-area h2 {
  color: var(--accent);
}

.bot-area h2 {
  color: #9ca3af;
}

.hand-count {
  margin: 4px 0 6px;
  color: #cbd5f5;
  font-size: 0.9rem;
}

.hint-text {
  margin: 6px 0 0;
  font-size: 0.78rem;
  color: #6b7280;
}

/* ---------- Center Card / Message ---------- */

.center-area {
  text-align: center;
}

.message {
  margin-top: 12px;
  min-height: 20px;
  font-size: 0.9rem;
  color: #e5e7eb;
}

/* ---------- Cards ---------- */

.hand {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 10px;
}

.card {
  width: 82px;
  height: 120px;
  border-radius: 18px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-weight: 700;
  cursor: pointer;
  user-select: none;
  font-size: 1.4rem;
  box-shadow:
    0 10px 24px rgba(15, 23, 42, 0.9),
    0 0 0 1px rgba(15, 23, 42, 0.7);
  transform: translateY(0) scale(1);
  transform-style: preserve-3d;
  transition:
    transform 0.4s ease,
    box-shadow 0.18s ease,
    opacity 0.18s ease,
    filter 0.18s ease;
}

.card-value {
  font-size: 1.4rem;
  line-height: 1;
}

.card-rule-line {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 4px;
}

.card-icon {
  font-size: 0.9rem;
}

.card span.small {
  font-size: 0.7rem;
  text-transform: none;
  letter-spacing: 0.03em;
}

/* Color themes */

.card.red {
  background: radial-gradient(circle at 20% 0, #fee2e2, #ef4444);
  color: #111827;
}

.card.blue {
  background: radial-gradient(circle at 20% 0, #dbeafe, #3b82f6);
  color: #0f172a;
}

.card.green {
  background: radial-gradient(circle at 20% 0, #dcfce7, #22c55e);
  color: #052e16;
}

.card.yellow {
  background: radial-gradient(circle at 20% 0, #fef9c3, #facc15);
  color: #3b2f07;
}

/* Hover / active */

.card:hover:not(.unplayable) {
  transform: translateY(-8px) scale(1.04);
  box-shadow:
    0 18px 40px rgba(15, 23, 42, 0.95),
    0 0 0 1px rgba(248, 250, 252, 0.3);
  filter: brightness(1.02);
}

.card:active:not(.unplayable) {
  transform: translateY(-3px) scale(0.98);
}

/* Unplayable cards */

.card.unplayable {
  opacity: 0.45;
  cursor: not-allowed;
  filter: grayscale(0.3);
}

/* Placeholder center card */

.card.placeholder {
  background: radial-gradient(circle at 10% 0, #111827, #020617);
  color: #6b7280;
  cursor: default;
}

/* Slide + flip animation */

.card.from-player {
  animation: slideFromRight 0.35s ease-out;
}

.card.from-bot {
  animation: slideFromLeft 0.35s ease-out;
}

.card.flip {
  transform: rotateY(180deg);
}

@keyframes slideFromRight {
  0% {
    transform: translateX(40px) scale(0.7);
    opacity: 0;
  }
  100% {
    transform: translateX(0) scale(1);
    opacity: 1;
  }
}

@keyframes slideFromLeft {
  0% {
    transform: translateX(-40px) scale(0.7);
    opacity: 0;
  }
  100% {
    transform: translateX(0) scale(1);
    opacity: 1;
  }
}

/* Rule text pulse */

@keyframes rulePulse {
  0% {
    transform: scale(1);
    color: var(--accent);
  }
  50% {
    transform: scale(1.1);
    color: #f97316;
  }
  100% {
    transform: scale(1);
    color: var(--accent);
  }
}

.rule-pulse {
  animation: rulePulse 0.28s ease-out;
}

/* Turn glow around panels */

.turn-glow {
  box-shadow:
    0 0 25px rgba(56, 189, 248, 0.6),
    0 0 50px rgba(56, 189, 248, 0.3);
  border-color: rgba(56, 189, 248, 0.7);
}

.bot-turn-glow {
  box-shadow:
    0 0 20px rgba(239, 68, 68, 0.65),
    0 0 40px rgba(239, 68, 68, 0.35),
    inset 0 0 10px rgba(239, 68, 68, 0.3);
  border-color: rgba(239, 68, 68, 0.75);
}

/* Sparkles */

.sparkle {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: radial-gradient(circle, #ffffff, #60a5fa);
  pointer-events: none;
  opacity: 0.85;
  filter: blur(0.2px);
  animation: sparkleUp 700ms ease-out forwards;
}

@keyframes sparkleUp {
  0% {
    transform: translateY(0) scale(0.6);
    opacity: 0.9;
  }
  70% {
    transform: translateY(-18px) scale(1);
    opacity: 0.7;
  }
  100% {
    transform: translateY(-28px) scale(0);
    opacity: 0;
  }
}

/* ---------- Buttons ---------- */

button {
  font-family: inherit;
  border: none;
  border-radius: 999px;
  padding: 8px 18px;
  font-size: 0.95rem;
  cursor: pointer;
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease,
    background 0.15s ease,
    opacity 0.15s ease;
}

.primary-btn {
  background: linear-gradient(135deg, var(--primary-btn-from), var(--primary-btn-to));
  color: #f9fafb;
  box-shadow: 0 10px 26px rgba(59, 130, 246, 0.6);
  margin-top: 10px;
}

.primary-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 30px rgba(59, 130, 246, 0.7);
}

.primary-btn:active {
  transform: translateY(1px) scale(0.98);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.8);
}

.primary-btn.big {
  padding: 10px 26px;
  font-size: 1.05rem;
}

.primary-btn.small {
  padding: 6px 14px;
  font-size: 0.85rem;
}

.danger-btn {
  background: linear-gradient(135deg, #f97373, #ef4444);
  color: #fef2f2;
  box-shadow: 0 10px 24px rgba(248, 113, 113, 0.55);
}

.ghost-btn {
  background: transparent;
  color: #e5e7eb;
  border: 1px solid rgba(148, 163, 184, 0.5);
  box-shadow: none;
}

.ghost-btn:hover {
  background: rgba(15, 23, 42, 0.8);
}

.ghost-btn.small {
  padding: 6px 10px;
  font-size: 0.8rem;
}

/* Disabled state */
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

/* ---------- Bottom Bar ---------- */

.bottom-bar {
  display: flex;
  justify-content: center;
  margin-top: 6px;
}

/* ---------- Start Screen ---------- */

.start-screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at top, var(--bg1) 0, transparent 55%),
    radial-gradient(circle at bottom, var(--bg2) 0, #020617 55%);
  z-index: 30;
}

.start-card {
  width: 100%;
  max-width: 460px;
  padding: 26px 26px 22px;
  border-radius: 24px;
  background: rgba(15, 23, 42, 0.96);
  box-shadow:
    0 26px 80px rgba(0, 0, 0, 0.9),
    0 0 0 1px rgba(148, 163, 184, 0.3);
  backdrop-filter: blur(26px);
  text-align: center;
}

.start-title {
  font-size: 2.5rem;
  margin: 0;
  letter-spacing: 0.06em;
  background: linear-gradient(120deg, #e5e7eb, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  color: transparent;
}

.start-subtitle {
  margin: 6px 0 16px;
  color: #9ca3af;
  font-size: 0.95rem;
}

.start-row {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.start-field {
  flex: 1;
  text-align: left;
}

.start-field label {
  display: block;
  font-size: 0.8rem;
  margin-bottom: 4px;
  color: #9ca3af;
}

.start-field select,
.start-field input {
  width: 100%;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: rgba(15, 23, 42, 0.95);
  color: #e5e7eb;
  font-size: 0.9rem;
}

.start-row.toggles {
  justify-content: center;
}

.start-buttons {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 10px;
}

/* Toggles */

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  color: #e5e7eb;
}

.toggle input {
  display: none;
}

.toggle span:first-of-type {
  width: 32px;
  height: 18px;
  border-radius: 999px;
  background: #111827;
  border: 1px solid rgba(148, 163, 184, 0.7);
  position: relative;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.toggle span:first-of-type::after {
  content: "";
  position: absolute;
  top: 1px;
  left: 1px;
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: #e5e7eb;
  transition: transform 0.2s ease;
}

.toggle input:checked + span {
  background: var(--accent);
  border-color: var(--accent);
}

.toggle input:checked + span::after {
  transform: translateX(12px);
}

.toggle-label {
  font-size: 0.8rem;
}

/* ---------- Modals ---------- */

.modal {
  position: fixed;
  inset: 0;
  z-index: 40;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  max-width: 520px;
  margin: 80px auto;
  background: rgba(15, 23, 42, 0.98);
  border-radius: 20px;
  padding: 20px 22px 18px;
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.9),
    0 0 0 1px rgba(148, 163, 184, 0.35);
  color: #e5e7eb;
}

.modal-content h2 {
  margin-top: 0;
}

.modal-content ul {
  padding-left: 18px;
  margin: 8px 0;
  font-size: 0.9rem;
}

.settings-row {
  margin-bottom: 10px;
  font-size: 0.9rem;
}

.settings-row label {
  display: block;
  margin-bottom: 4px;
  color: #9ca3af;
}

.settings-row select {
  width: 100%;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  background: rgba(15, 23, 42, 0.95);
  color: #e5e7eb;
  font-size: 0.9rem;
}

.settings-toggles {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  margin-top: 10px;
  padding: 4px 4px;
}

.settings-toggles .toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.settings-toggles .toggle-label {
  font-size: 0.85rem;
  white-space: nowrap;
}

.settings-toggles .toggle span:first-of-type {
  width: 34px;
  height: 18px;
}

.settings-toggles .toggle span:first-of-type::after {
  width: 14px;
  height: 14px;
}

.settings-row.settings-toggles {
  margin-top: 16px;
  margin-bottom: 6px;
}

.settings-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 12px;
}

/* How-to actions row */

.howto-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 16px;
}

/* ---------- Tutorial modal ---------- */

.tutorial-modal-content {
  max-width: 720px;
}

.tutorial-caption {
  margin-top: 4px;
  margin-bottom: 10px;
  font-size: 0.9rem;
  color: #cbd5f5;
}

.tutorial-board {
  margin-top: 8px;
  border-radius: 16px;
  padding: 14px 14px 10px;
  background: radial-gradient(circle at top left, rgba(56,189,248,0.12), transparent 55%),
              radial-gradient(circle at bottom right, rgba(236,72,153,0.12), transparent 55%),
              rgba(15,23,42,0.98);
  border: 1px solid rgba(148,163,184,0.45);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  align-items: flex-start;
}

.tutorial-column-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #9ca3af;
  margin-bottom: 4px;
}

.tutorial-col {
  text-align: center;
}

.tutorial-board .card {
  width: 70px;
  height: 100px;
  cursor: default;
}

.tutorial-board .card:hover {
  transform: translateY(0) scale(1);
  box-shadow:
    0 10px 24px rgba(15, 23, 42, 0.9),
    0 0 0 1px rgba(15, 23, 42, 0.7);
}

.tutorial-card-row {
  display: flex;
  justify-content: center;
  gap: 8px;
}

.tutorial-highlight {
  box-shadow:
    0 0 0 2px rgba(248, 250, 252, 0.9),
    0 0 25px rgba(56, 189, 248, 0.9);
}

.tutorial-arrow-box {
  margin-top: 6px;
  font-size: 0.82rem;
  color: #e5e7eb;
  position: relative;
  padding-left: 18px;
}

.tutorial-arrow-box::before {
  content: "➜";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
}

.tutorial-dots {
  margin-top: 10px;
  text-align: center;
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  color: #6b7280;
}

.tutorial-dot-active {
  color: #f9fafb;
}

.tutorial-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
}

.tutorial-nav {
  display: flex;
  gap: 8px;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  body {
    padding: 12px;
  }

  .app-shell {
    padding: 18px 12px 14px;
  }

  .board {
    grid-template-columns: 1fr;
  }

  .top-bar {
    flex-direction: column;
  }

  .header-top {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-actions {
    align-self: stretch;
    justify-content: flex-end;
  }
}

@media (max-width: 520px) {
  .card {
    width: 70px;
    height: 100px;
    font-size: 1.1rem;
  }

  .start-card {
    margin: 0 10px;
  }

  .tutorial-board {
    grid-template-columns: 1fr;
  }
}

/* Card tilt */
.card:hover {
  transform: perspective(600px) rotateX(4deg) rotateY(4deg);
}

/* Invalid shake */
.card.invalid {
  animation: shake 0.2s;
}

@keyframes shake {
  0% { transform: translateX(0); }
  25% { transform: translateX(-3px); }
  50% { transform: translateX(3px); }
  75% { transform: translateX(-3px); }
  100% { transform: translateX(0); }
}

/* Glow trail */
.card.play-anim {
  animation: cardSlide 0.3s ease-out;
}

@keyframes cardSlide {
  from { transform: translateY(-10px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.achievement-row {
  padding: 8px 10px;
  margin-bottom: 6px;
  border-radius: 10px;
  font-size: 0.9rem;
}

.achievement-row.unlocked {
  background: rgba(46, 204, 113, 0.12);
}

.achievement-row.locked {
  background: rgba(255, 255, 255, 0.03);
  opacity: 0.7;
}

.achievement-title {
  font-weight: 600;
  margin-bottom: 2px;
}

.achievement-desc {
  font-size: 0.8rem;
  opacity: 0.8;
}