/* ======= CSS Custom Properties ======= */
:root {
  --color-bg: #1A1A2E;
  --color-surface: #16213E;
  --color-box-default: #0F3460;
  --color-box-active: #1A5276;
  --color-correct: #27AE60;
  --color-wrong: #E74C3C;
  --color-fail-reveal: #5D6D7E;
  --color-text: #ECF0F1;
  --color-text-dim: #8899AA;
  --color-gold: #F39C12;
  --color-key-bg: #2C3E6D;
  --color-key-hover: #3D5080;
  --color-modal-bg: #1E2A4A;
  --box-size: 48px;
  --box-gap: 6px;
  --box-radius: 8px;
  --keyboard-btn-w: 36px;
  --keyboard-btn-h: 42px;
  --keyboard-gap: 4px;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100dvh;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.app {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  max-width: 520px;
  margin: 0 auto;
}

/* ======= Header ======= */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  flex-shrink: 0;
}

.header-title {
  text-align: center;
}

.header-title h1 {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 4px;
  color: var(--color-gold);
}

.day-number {
  font-size: 12px;
  color: var(--color-text-dim);
  font-weight: 600;
}

.header-btn {
  background: none;
  border: none;
  color: var(--color-text-dim);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: background 0.2s;
}

.header-btn:hover {
  background: rgba(255,255,255,0.08);
}

/* ======= Score Bar ======= */
.score-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 20px;
  flex-shrink: 0;
}

.score-display, .lives-display {
  display: flex;
  align-items: center;
  gap: 8px;
}

.score-label, .lives-label {
  font-size: 13px;
  color: var(--color-text-dim);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.score-value {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-gold);
  min-width: 28px;
}

.lives-hearts {
  display: flex;
  gap: 4px;
}

.lives-count {
  display: flex;
  gap: 4px;
  font-size: 18px;
  font-weight: 800;
  color: var(--color-correct);
}

.lives-total {
  font-size: 14px;
  color: var(--color-text-dim);
}

/* ======= Pyramid ======= */
.pyramid {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--box-gap);
  padding: 12px 8px;
  flex: 1;
  min-height: 0;
}

.pyramid-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--box-gap);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.pyramid-row.inactive {
  opacity: 0.45;
}

.pyramid-row.active {
  opacity: 1;
}

.pyramid-row.completed {
  opacity: 0.85;
}

.pyramid-row.failed {
  opacity: 0.65;
}

.box {
  width: var(--box-size);
  height: var(--box-size);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-box-default);
  border-radius: var(--box-radius);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  position: relative;
  transition: background 0.3s, transform 0.3s;
  perspective: 600px;
}

.pyramid-row.active .box {
  background: var(--color-box-active);
  box-shadow: 0 0 12px rgba(243, 156, 18, 0.2);
}

.box .box-content {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  transition: transform 0.4s ease;
  transform-style: preserve-3d;
}

.box.flipping .box-content {
  animation: flipBox 0.5s ease;
}

.box.revealed-correct {
  background: var(--color-correct);
}

.box.revealed-fail {
  background: var(--color-fail-reveal);
}

.box.guessed {
  background: var(--color-correct);
  box-shadow: 0 0 8px rgba(39, 174, 96, 0.4);
}

.box .letter-display {
  font-size: 20px;
  font-weight: 800;
}

.box .number-badge {
  position: absolute;
  top: 2px;
  right: 4px;
  font-size: 9px;
  font-weight: 600;
  opacity: 0.6;
  color: rgba(255,255,255,0.8);
}

/* ======= Keyboard ======= */
.keyboard {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--keyboard-gap);
  padding: 10px 4px;
  padding-bottom: max(10px, env(safe-area-inset-bottom));
  background: var(--color-surface);
  border-top: 1px solid rgba(255,255,255,0.08);
  flex-shrink: 0;
}

.keyboard-row {
  display: flex;
  gap: var(--keyboard-gap);
  justify-content: center;
}

.key {
  width: var(--keyboard-btn-w);
  height: var(--keyboard-btn-h);
  border-radius: 6px;
  border: none;
  background: var(--color-key-bg);
  color: var(--color-text);
  font-size: 14px;
  font-weight: 700;
  font-family: var(--font-family);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.key:active {
  transform: scale(0.92);
}

.key.correct {
  background: var(--color-correct);
  color: white;
}

.key.wrong {
  background: var(--color-wrong);
  color: white;
  opacity: 0.85;
}

.key.disabled {
  pointer-events: none;
  opacity: 0.3;
}

/* ======= Animations ======= */
@keyframes flipBox {
  0%   { transform: rotateX(0deg); }
  50%  { transform: rotateX(90deg); }
  100% { transform: rotateX(0deg); }
}

@keyframes shakeRow {
  0%, 100% { transform: translateX(0); }
  20%      { transform: translateX(-6px); }
  40%      { transform: translateX(6px); }
  60%      { transform: translateX(-4px); }
  80%      { transform: translateX(4px); }
}

@keyframes bounceIn {
  0%   { transform: scale(0.8); opacity: 0; }
  60%  { transform: scale(1.05); }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes pulseGold {
  0%, 100% { box-shadow: 0 0 12px rgba(243, 156, 18, 0.2); }
  50%      { box-shadow: 0 0 20px rgba(243, 156, 18, 0.5); }
}

.pyramid-row.active .box {
  animation: pulseGold 2s infinite ease-in-out;
}

.pyramid-row.shake {
  animation: shakeRow 0.4s ease;
}

.row-complete-flash {
  animation: bounceIn 0.4s ease;
}

/* ======= Modals ======= */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
  backdrop-filter: blur(4px);
}

.modal-overlay.show {
  display: flex;
}

.modal {
  background: var(--color-modal-bg);
  border-radius: 16px;
  max-width: 380px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  animation: bounceIn 0.3s ease;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.modal-header h2 {
  font-size: 18px;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  color: var(--color-text-dim);
  font-size: 28px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}

.modal-body {
  padding: 16px 20px 24px;
}

.modal-body p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-dim);
  margin-bottom: 8px;
}

/* Help Modal */
.help-section {
  margin-top: 12px;
}

.help-section h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-gold);
  margin-bottom: 4px;
}

/* Stats Modal */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.stat-item {
  text-align: center;
  background: rgba(255,255,255,0.04);
  border-radius: 12px;
  padding: 16px 8px;
}

.stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--color-gold);
}

.stat-label {
  font-size: 11px;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 4px;
}

/* Game Over Modal */
.gameover-modal {
  text-align: center;
}

.gameover-score {
  font-size: 48px;
  font-weight: 800;
  color: var(--color-gold);
  margin: 8px 0;
}

.gameover-score .max-score {
  font-size: 20px;
  color: var(--color-text-dim);
  font-weight: 600;
}

.gameover-rows {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin: 16px 0;
}

.gameover-row-dot {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: white;
}

.share-btn {
  background: var(--color-correct);
  color: white;
  border: none;
  border-radius: 12px;
  padding: 14px 40px;
  font-size: 16px;
  font-weight: 700;
  font-family: var(--font-family);
  cursor: pointer;
  margin: 16px 0 8px;
  transition: transform 0.1s, background 0.2s;
}

.share-btn:active {
  transform: scale(0.96);
}

.share-toast {
  font-size: 13px;
  color: var(--color-correct);
  font-weight: 600;
  opacity: 0;
  transition: opacity 0.3s;
}

.share-toast.show {
  opacity: 1;
}

.next-game {
  margin-top: 12px;
  font-size: 14px;
  color: var(--color-text-dim);
}

.next-game .countdown {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-top: 4px;
}

/* ======= Responsive ======= */

/* Çok küçük telefonlar */
@media (max-width: 359px) {
  :root {
    --box-size: 38px;
    --box-gap: 4px;
    --keyboard-btn-w: 30px;
    --keyboard-btn-h: 36px;
    --keyboard-gap: 3px;
  }
  .header-title h1 { font-size: 18px; letter-spacing: 2px; }
  .box .letter-display { font-size: 16px; }
  .box { font-size: 15px; }
  .key { font-size: 12px; }
}

/* Standart telefonlar */
@media (min-width: 360px) and (max-width: 479px) {
  :root {
    --box-size: 46px;
    --box-gap: 5px;
    --keyboard-btn-w: 34px;
    --keyboard-btn-h: 40px;
    --keyboard-gap: 4px;
  }
}

/* Büyük telefonlar */
@media (min-width: 480px) and (max-width: 767px) {
  :root {
    --box-size: 54px;
    --box-gap: 7px;
    --keyboard-btn-w: 40px;
    --keyboard-btn-h: 44px;
  }
  .box { font-size: 20px; }
  .box .letter-display { font-size: 22px; }
}

/* Tablet ve masaüstü */
@media (min-width: 768px) {
  :root {
    --box-size: 62px;
    --box-gap: 8px;
    --keyboard-btn-w: 44px;
    --keyboard-btn-h: 48px;
  }
  .box { font-size: 22px; }
  .box .letter-display { font-size: 26px; }
  .key { font-size: 16px; }
}

/* Kısa ekranlar için (landscape veya küçük ekranlar) */
@media (max-height: 640px) {
  :root {
    --box-size: 36px;
    --box-gap: 3px;
    --keyboard-btn-h: 34px;
  }
  .score-bar { padding: 4px 16px; }
  .pyramid { padding: 6px 4px; }
  .keyboard { padding: 6px 4px; }
}