/* ============================================================
   Simon Game - Style
   Dark theme, mobile-first
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #0a0e14;
  --surface: #131920;
  --border: #1e2a38;

  /* Color palette - dim (default) */
  --red-dim:    #5a1a1a;
  --blue-dim:   #1a2e5a;
  --green-dim:  #0d3d2b;
  --yellow-dim: #4a3a08;

  /* Color palette - bright (active/lit) */
  --red-bright:    #EF4444;
  --blue-bright:   #3B82F6;
  --green-bright:  #10B981;
  --yellow-bright: #EAB308;

  /* Glow colors */
  --red-glow:    rgba(239, 68, 68, 0.7);
  --blue-glow:   rgba(59, 130, 246, 0.7);
  --green-glow:  rgba(16, 185, 129, 0.7);
  --yellow-glow: rgba(234, 179, 8, 0.7);

  --text-primary:   #e8edf3;
  --text-secondary: #7a8fa8;
  --accent:         #3B82F6;

  --radius-btn: 20px;
  --gap: 12px;
  --btn-size: min(42vw, 200px);
}

html, body {
  height: 100%;
  width: 100%;
}

body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

/* ============================================================
   Utility
   ============================================================ */
.hidden { display: none !important; }

/* ============================================================
   Overlay screens (start + game over)
   ============================================================ */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 14, 20, 0.96);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  animation: fadeIn 0.3s ease;
}

.overlay-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  padding: 40px 32px;
  max-width: 340px;
  width: 100%;
}

/* Start screen */
.game-title {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  background: linear-gradient(135deg, var(--red-bright), var(--blue-bright), var(--green-bright), var(--yellow-bright));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.game-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-top: -18px;
}

.best-score-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px 40px;
}

.best-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.best-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--yellow-bright);
}

/* Game Over screen */
.gameover-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--red-bright);
}

.score-block {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 32px;
}

.score-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.score-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.score-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
}

.score-value.best {
  color: var(--yellow-bright);
}

/* Shared button */
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 16px 56px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  letter-spacing: 0.05em;
}

.btn-primary:hover  { background: #2563eb; }
.btn-primary:active { transform: scale(0.96); }

/* ============================================================
   Game Area
   ============================================================ */
#game-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 480px;
  padding: 16px;
  gap: 16px;
  height: 100dvh;
  justify-content: center;
}

/* Header */
.game-header {
  display: flex;
  gap: 32px;
  justify-content: center;
}

.header-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.header-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.header-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  min-width: 2.5ch;
  text-align: center;
}

/* Status text */
.status-text {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  min-height: 1.5em;
  text-align: center;
  transition: color 0.2s;
}

.status-text.watching  { color: var(--blue-bright); }
.status-text.player    { color: var(--green-bright); }
.status-text.correct   { color: var(--green-bright); }
.status-text.wrong     { color: var(--red-bright); }

/* ============================================================
   Simon Grid
   ============================================================ */
.simon-container {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.simon-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: var(--gap);
  width: calc(var(--btn-size) * 2 + var(--gap));
  height: calc(var(--btn-size) * 2 + var(--gap));
}

/* Simon buttons */
.simon-btn {
  width: var(--btn-size);
  height: var(--btn-size);
  border: none;
  cursor: pointer;
  transition: opacity 0.12s ease, box-shadow 0.12s ease, transform 0.08s ease;
  outline: none;
  -webkit-tap-highlight-color: transparent;
}

/* Position & shape */
#btn-red    { border-radius: var(--radius-btn) 6px 6px 6px; }
#btn-blue   { border-radius: 6px var(--radius-btn) 6px 6px; }
#btn-green  { border-radius: 6px 6px 6px var(--radius-btn); }
#btn-yellow { border-radius: 6px 6px var(--radius-btn) 6px; }

/* Default (dim) colors */
#btn-red    { background: var(--red-dim); }
#btn-blue   { background: var(--blue-dim); }
#btn-green  { background: var(--green-dim); }
#btn-yellow { background: var(--yellow-dim); }

/* Active / lit states */
#btn-red.active {
  background: var(--red-bright);
  box-shadow: 0 0 40px 12px var(--red-glow), 0 0 80px 20px rgba(239,68,68,0.3);
  transform: scale(1.04);
}
#btn-blue.active {
  background: var(--blue-bright);
  box-shadow: 0 0 40px 12px var(--blue-glow), 0 0 80px 20px rgba(59,130,246,0.3);
  transform: scale(1.04);
}
#btn-green.active {
  background: var(--green-bright);
  box-shadow: 0 0 40px 12px var(--green-glow), 0 0 80px 20px rgba(16,185,129,0.3);
  transform: scale(1.04);
}
#btn-yellow.active {
  background: var(--yellow-bright);
  box-shadow: 0 0 40px 12px var(--yellow-glow), 0 0 80px 20px rgba(234,179,8,0.3);
  transform: scale(1.04);
}

/* Disabled state: slightly muted, no pointer */
.simon-btn:disabled {
  cursor: default;
  pointer-events: none;
}

/* Player press feedback (when not disabled) */
.simon-btn:not(:disabled):active {
  transform: scale(0.97);
}

/* ============================================================
   Center Display (round indicator)
   ============================================================ */
.center-display {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: 50%;
  pointer-events: none;
  z-index: 10;
}

.round-number {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.round-label {
  font-size: 0.6rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ============================================================
   Animations
   ============================================================ */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes correctFlash {
  0%   { opacity: 1; }
  40%  { opacity: 0.4; }
  100% { opacity: 1; }
}

@keyframes wrongShake {
  0%, 100% { transform: translateX(0); }
  20%       { transform: translateX(-8px); }
  40%       { transform: translateX(8px); }
  60%       { transform: translateX(-5px); }
  80%       { transform: translateX(5px); }
}

.anim-correct {
  animation: correctFlash 0.4s ease;
}

.anim-wrong {
  animation: wrongShake 0.4s ease;
}

/* ============================================================
   Responsive: very small screens
   ============================================================ */
@media (max-height: 600px) {
  :root { --btn-size: min(38vw, 170px); }
  .game-header { gap: 20px; }
  .header-value { font-size: 1.4rem; }
  .status-text  { font-size: 0.95rem; }
}

@media (max-width: 360px) {
  :root { --btn-size: min(44vw, 160px); --gap: 8px; }
}

/* ============================================================
   Leaderboard TOP5 — Simon은 항상 다크 배경이므로
   OS 라이트 모드에서도 밝은 텍스트 색 강제 적용
   ============================================================ */
.lb-start-ranking {
  background: rgba(255, 255, 255, 0.07) !important;
  border-color: rgba(255, 255, 255, 0.14) !important;
}
.lb-start-title  { color: rgba(255, 255, 255, 0.6)  !important; }
.lb-start-rank   { color: rgba(255, 255, 255, 0.55) !important; }
.lb-start-name   { color: rgba(255, 255, 255, 0.9)  !important; }
.lb-start-score  { color: rgba(255, 255, 255, 0.75) !important; }
.lb-start-status { color: rgba(255, 255, 255, 0.45) !important; }
.lb-start-row:nth-child(odd) { background: rgba(255, 255, 255, 0.04) !important; }