:root {
  --brand-ivory: #FDF8F3;
  --brand-warm-gold: #B68E6B;
  --brand-coral: #E8654B;
  --brand-deep-moss: #7D733A;
  --frame-orange: #ff7c00;
  --frame-gap: 24px;
  --topbar: calc(var(--frame-gap) * 4.8);
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
  margin: 0;
}

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--frame-orange);
  color: #333;
  overscroll-behavior: contain;
  padding: env(safe-area-inset-top) 0 env(safe-area-inset-bottom);
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  height: var(--topbar);
  padding: 0 12px;
}

.header img {
  height: calc(var(--topbar) * 1.0);
}

.header .title {
  flex: 1;
  text-align: center;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.5px;
  font-size: calc(var(--topbar) * 0.56);
  line-height: var(--topbar);
}

.lang-switcher {
  margin-left: 12px;
}

.lang-switcher select {
  padding: 6px 10px;
  border-radius: 8px;
  border: 2px solid var(--brand-warm-gold);
  font-weight: 600;
  background: #fff;
  font-size: 14px;
}

/* Container */
.container {
  position: relative;
  max-width: 1200px;
  margin: var(--frame-gap) auto var(--frame-gap);
  padding: 24px;
  background: var(--brand-ivory);
  border-radius: 28px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

/* Cards */
.card {
  background: transparent;
  border: 0;
  border-radius: 16px;
  padding: 16px;
}

.hidden {
  display: none !important;
}

/* Controls */
.controls-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 12px 0;
  justify-content: center;
}

.controls-row .group {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.controls-row .group label {
  min-width: 110px;
  color: var(--brand-deep-moss);
  font-weight: 600;
}

.time-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.time-value {
  min-width: 50px;
  font-weight: 700;
  color: var(--brand-coral);
}

select, input[type="number"], input[type="range"], input[type="text"] {
  padding: 10px 12px;
  border: 2px solid var(--brand-warm-gold);
  border-radius: 12px;
  background: #fff;
  font-size: 16px;
  min-height: 44px;
}

input[type="range"] {
  min-width: 150px;
}

/* Buttons */
button {
  padding: 10px 14px;
  border: 0;
  border-radius: 12px;
  background: var(--brand-coral);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  font-size: 16px;
  min-height: 44px;
  transition: transform 0.2s, box-shadow 0.2s;
}

button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(232, 101, 75, 0.3);
}

button:active {
  transform: translateY(0);
}

button.secondary {
  background: #fff;
  color: var(--brand-coral);
  border: 2px solid var(--brand-coral);
}

button.exit {
  background: #fff;
  color: var(--brand-coral);
  border: 2px solid var(--brand-coral);
  padding: 8px 12px;
  border-radius: 12px;
  font-weight: 700;
}

button.btn-primary {
  background: var(--brand-coral);
  color: #fff;
  font-size: 18px;
  padding: 14px 28px;
}

button.btn-check {
  background: var(--brand-deep-moss);
  color: #fff;
}

/* Sections */
.section-title {
  text-align: center;
  color: var(--brand-deep-moss);
  margin: 16px 0;
  font-size: 28px;
}

.section-subtitle {
  color: var(--brand-deep-moss);
  margin: 16px 0 8px;
  font-size: 18px;
  font-weight: 700;
}

.start-panel {
  max-width: 70%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.flex-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Topbar */
.topbar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: transparent;
}

.topbar > div {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
}

.badge {
  background: var(--brand-warm-gold);
  color: #fff;
  padding: 8px 16px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 18px;
}

.timer-box {
  background: var(--brand-coral);
  color: #fff;
  padding: 6px 14px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 16px;
  min-width: 60px;
  text-align: center;
}

/* Memory Screen */
.memory-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px 0;
}

.memory-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 16px;
  max-width: 100%;
  justify-items: center;
}

/* Element Card */
.element-card {
  position: relative;
  width: 120px;
  height: 120px;
  border: 3px solid var(--brand-warm-gold);
  border-radius: 16px;
  background: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: transform 0.2s;
}

.element-card:hover {
  transform: scale(1.05);
}

.element-card img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.element-number {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 80px;
  font-weight: 900;
  color: rgba(182, 142, 107, 0.15);
  pointer-events: none;
  z-index: 0;
  user-select: none;
}

/* Play Screen - Slots */
.slots-container {
  margin: 16px 0;
}

.slots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  justify-items: center;
}

.slot {
  position: relative;
  width: 160px;
  height: 160px;
  border: 3px dashed var(--brand-warm-gold);
  border-radius: 16px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}

.slot.drag-over {
  background: rgba(182, 142, 107, 0.1);
  border-color: var(--brand-coral);
  box-shadow: 0 0 0 4px rgba(232, 101, 75, 0.2);
}

.slot.wrong {
  animation: shake 0.5s, wrongPulse 1s;
  border-color: #ff0000;
  background: rgba(255, 0, 0, 0.1);
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-10px); }
  75% { transform: translateX(10px); }
}

@keyframes wrongPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.slot-number {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 60px;
  font-weight: 900;
  color: rgba(182, 142, 107, 0.2);
  pointer-events: none;
  z-index: 0;
  user-select: none;
}

/* Hide slot number when slot is filled */
.slot:has(.element-card) .slot-number {
  display: none;
}

.slot .element-card {
  position: relative;
  z-index: 1;
  width: 150px;
  height: 150px;
  cursor: grab;
}

.slot .element-card:active {
  cursor: grabbing;
}

/* Options Tray */
.options-tray {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  padding: 16px;
  min-height: 140px;
  border: 2px solid var(--brand-warm-gold);
  border-radius: 16px;
  background: #fff;
  justify-content: center;
  align-items: flex-start;
}

.element-card.option {
  cursor: grab;
  transition: transform 0.2s;
}

.element-card.option:active {
  cursor: grabbing;
  transform: scale(1.1);
}

/* Results */
.results {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
  text-align: center;
  padding: 20px;
}

.results h2 {
  color: var(--brand-deep-moss);
  font-size: 36px;
  margin: 0;
}

.success-message {
  font-size: 28px;
  font-weight: 800;
  color: var(--brand-coral);
  animation: successPulse 1.5s infinite;
}

@keyframes successPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.stats {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.stat {
  padding: 12px 20px;
  border-radius: 12px;
  background: #fff;
  border: 2px solid var(--brand-warm-gold);
  font-weight: 700;
  font-size: 18px;
  color: var(--brand-deep-moss);
}

.stat span {
  color: var(--brand-coral);
  font-size: 24px;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  z-index: 10000;
}

.modal.hidden {
  display: none;
}

.modal-card {
  width: min(92vw, 460px);
  background: var(--brand-ivory);
  border: 2px solid var(--brand-warm-gold);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
}

.modal-card h3 {
  margin: 0 0 8px;
  color: var(--brand-deep-moss);
}

.meta {
  color: #777;
  font-size: 14px;
}

/* Confetti Canvas */
#confettiCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  display: none;
}

/* Mobile Responsive */
@media (max-width: 900px) {
  .memory-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 12px;
  }
  
  .element-card {
    width: 100px;
    height: 100px;
  }
  
  .element-number {
    font-size: 60px;
  }
  
  .slots-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  }

  .slot {
    width: 120px;
    height: 120px;
  }

  .slot-number {
    font-size: 50px;
  }

  .slot .element-card {
    width: 110px;
    height: 110px;
  }
}

@media (max-width: 720px) {
  :root {
    --frame-gap: 16px;
    --topbar: calc(var(--frame-gap) * 4.5);
  }
  
  .header img {
    height: calc(var(--topbar) * 0.7);
  }
  
  .header .title {
    font-size: clamp(20px, 7vw, 36px);
    line-height: var(--topbar);
  }
  
  .container {
    padding: 16px;
    border-radius: 20px;
    margin: var(--frame-gap) auto var(--frame-gap);
  }
  
  .start-panel {
    max-width: 100%;
  }
  
  .section-title {
    font-size: 24px;
  }
  
  .results h2 {
    font-size: 28px;
  }
  
  .success-message {
    font-size: 22px;
  }
}

/* Accessibility */
button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(182, 142, 107, 0.6);
  outline-offset: 2px;
  border-radius: 12px;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}