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

:root {
  /* الألوان حسب project.md */
  --color-bg: #070b17;
  --color-card: #111827;
  --color-accent: #f472b6;
  --color-gold: #fbbf24;
  --color-text: #ffffff;
  --color-text-dim: rgba(255, 255, 255, 0.65);

  /* مشتقات */
  --color-accent-glow: rgba(244, 114, 182, 0.45);
  --color-gold-glow: rgba(251, 191, 36, 0.4);
  --glass-bg: rgba(17, 24, 39, 0.55);
  --glass-border: rgba(255, 255, 255, 0.12);

  /* قياسات */
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition-fast: 0.2s ease;
  --transition-medium: 0.45s cubic-bezier(0.22, 1, 0.36, 1);
  --transition-slow: 0.9s cubic-bezier(0.22, 1, 0.36, 1);

  --font-main: "Cairo", "Tajawal", sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  position: relative;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* تحسين الوصولية: إظهار outline عند التنقل بالكيبورد فقط */
:focus {
  outline: none;
}
:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ==========================================================================
   خلفية النجوم
   ========================================================================== */
#stars-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ==========================================================================
   القلوب المتطايرة
   ========================================================================== */
#hearts-container {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  overflow: hidden;
}

.floating-heart {
  position: absolute;
  bottom: -40px;
  font-size: 1.4rem;
  opacity: 0;
  will-change: transform, opacity;
  animation: floatUp linear forwards;
  color: var(--color-accent);
  filter: drop-shadow(0 0 6px var(--color-accent-glow));
}

@keyframes floatUp {
  0% {
    transform: translate3d(0, 0, 0) scale(0.6) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.9;
  }
  90% {
    opacity: 0.8;
  }
  100% {
    transform: translate3d(var(--drift, 30px), -110vh, 0) scale(1.1) rotate(20deg);
    opacity: 0;
  }
}

/* ==========================================================================
   الكونفيتي
   ========================================================================== */
#confetti-container {
  position: fixed;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  overflow: hidden;
}

.confetti-piece {
  position: absolute;
  top: -20px;
  width: 8px;
  height: 14px;
  opacity: 0;
  will-change: transform, opacity;
  animation: confettiFall linear forwards;
  border-radius: 2px;
}

@keyframes confettiFall {
  0% {
    transform: translate3d(0, 0, 0) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translate3d(var(--drift-x, 0), 105vh, 0) rotate(540deg);
    opacity: 0.9;
  }
}

/* ==========================================================================
   زر الموسيقى
   ========================================================================== */
.music-btn {
  position: fixed;
  top: 18px;
  left: 18px;
  z-index: 50;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.35);
}

.music-btn:hover {
  transform: scale(1.08);
  background: rgba(244, 114, 182, 0.18);
  box-shadow: 0 6px 22px var(--color-accent-glow);
}

.music-btn:active {
  transform: scale(0.94);
}

.music-btn.playing {
  color: var(--color-accent);
  animation: pulseGlow 2.4s ease-in-out infinite;
}

.music-btn.shake-hint {
  animation: shakeHint 0.4s ease;
}

@keyframes shakeHint {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.35);
  }
  50% {
    box-shadow: 0 4px 22px var(--color-accent-glow);
  }
}

/* ==========================================================================
   شريط التقدّم
   ========================================================================== */
.progress-track {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 50;
  background: rgba(255, 255, 255, 0.08);
}

.progress-fill {
  height: 100%;
  width: 16.66%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  transition: width var(--transition-slow);
  box-shadow: 0 0 10px var(--color-accent-glow);
}

/* ==========================================================================
   تخطيط المشاهد
   ========================================================================== */
#app {
  position: relative;
  z-index: 5;
  min-height: 100vh;
  min-height: 100dvh;
}

.scene {
  display: none;
  min-height: 100vh;
  min-height: 100dvh;
  width: 100%;
  align-items: center;
  justify-content: center;
  padding: 32px 20px;
}

.scene.active {
  display: flex;
  animation: sceneFadeIn var(--transition-slow);
}

@keyframes sceneFadeIn {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.scene-inner {
  width: 100%;
  max-width: 640px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
}

.scene-title {
  font-size: clamp(1.5rem, 4.5vw, 2.3rem);
  font-weight: 800;
  text-shadow: 0 0 18px var(--color-accent-glow);
}

.scene-subtitle {
  font-size: clamp(0.95rem, 2.5vw, 1.1rem);
  color: var(--color-text-dim);
  font-weight: 500;
}

.scene-message {
  font-size: clamp(1.05rem, 3vw, 1.3rem);
  font-weight: 600;
  color: var(--color-text);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 22px 26px;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  animation: scaleFadeIn var(--transition-medium);
}

.scene-answer {
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  font-weight: 800;
  color: var(--color-accent);
  text-shadow: 0 0 22px var(--color-accent-glow);
  animation: scaleFadeIn var(--transition-medium);
}

@keyframes scaleFadeIn {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* ==========================================================================
   الأزرار
   ========================================================================== */
.btn {
  position: relative;
  overflow: hidden;
  font-family: var(--font-main);
  font-size: clamp(0.95rem, 2.5vw, 1.05rem);
  font-weight: 700;
  color: var(--color-text);
  background: linear-gradient(135deg, var(--color-accent), #ec4899);
  border: none;
  padding: 14px 34px;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 6px 24px var(--color-accent-glow);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px var(--color-accent-glow);
  filter: brightness(1.08);
}

.btn:active {
  transform: translateY(0) scale(0.96);
  box-shadow: 0 4px 14px var(--color-accent-glow);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* تأثير Ripple */
.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.55);
  transform: scale(0);
  animation: rippleAnim 0.6s ease-out;
  pointer-events: none;
}

@keyframes rippleAnim {
  to {
    transform: scale(3.5);
    opacity: 0;
  }
}

.reveal-btn {
  opacity: 0;
  animation: scaleFadeIn var(--transition-medium) forwards;
}

/* ==========================================================================
   المشهد 1: Typing Effect
   ========================================================================== */
.typing-wrap {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  min-height: 4.5rem;
  flex-wrap: wrap;
}

.typing-text {
  font-size: clamp(1.4rem, 5vw, 2.4rem);
  font-weight: 800;
  text-shadow: 0 0 20px var(--color-accent-glow);
}

.cursor {
  display: inline-block;
  width: 3px;
  height: clamp(1.6rem, 5vw, 2.2rem);
  background: var(--color-gold);
  animation: blink 0.9s step-end infinite;
  box-shadow: 0 0 8px var(--color-gold-glow);
}

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

/* ==========================================================================
   المشهد 2: لعبة القلب
   ========================================================================== */
.heart-game-area {
  position: relative;
  width: 100%;
  max-width: 480px;
  height: 320px;
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow: hidden;
}

.floating-heart-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2.6rem;
  line-height: 1;
  background: none;
  border: none;
  cursor: pointer;
  filter: drop-shadow(0 0 12px var(--color-accent-glow));
  transition: top var(--transition-medium), left var(--transition-medium), transform var(--transition-fast);
  padding: 10px;
}

.floating-heart-btn:hover {
  transform: translate(-50%, -50%) scale(1.15);
}

.floating-heart-btn:active {
  transform: translate(-50%, -50%) scale(0.9);
}

/* ==========================================================================
   المشهد 3: نموذج التخمين
   ========================================================================== */
.guess-form {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
}

.guess-input {
  font-family: var(--font-main);
  font-size: 1.05rem;
  color: var(--color-text);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 14px 20px;
  border-radius: 999px;
  text-align: center;
  width: 220px;
  max-width: 70vw;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.guess-input::placeholder {
  color: var(--color-text-dim);
}

.guess-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 16px var(--color-accent-glow);
}

.reveal-message {
  margin-top: 6px;
}

/* ==========================================================================
   المشهد 4: الظروف
   ========================================================================== */
.envelopes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 18px;
  width: 100%;
}

.envelope {
  position: relative;
  aspect-ratio: 1 / 0.8;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--color-gold);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.envelope:hover {
  transform: translateY(-4px) scale(1.03);
  box-shadow: 0 10px 26px var(--color-gold-glow);
}

.envelope:active {
  transform: translateY(-1px) scale(0.98);
}

.envelope.opened {
  cursor: default;
  color: var(--color-accent);
  background: rgba(244, 114, 182, 0.1);
}

.envelope.opened:hover {
  transform: none;
  box-shadow: none;
}

.envelope-icon {
  transition: transform var(--transition-medium), opacity var(--transition-medium);
}

.envelope.opened .envelope-icon {
  transform: scale(0);
  opacity: 0;
  position: absolute;
}

.envelope-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 10px;
  opacity: 0;
  transform: scale(0.85);
  transition: opacity var(--transition-medium), transform var(--transition-medium);
}

.envelope.opened .envelope-text {
  opacity: 1;
  transform: scale(1);
}

/* ==========================================================================
   العداد (مستخدم في مشهدين)
   ========================================================================== */
.counter-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  width: 100%;
  max-width: 460px;
}

.counter-box {
  background: var(--color-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 16px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.counter-value {
  font-size: clamp(1.4rem, 5vw, 2rem);
  font-weight: 800;
  color: var(--color-gold);
  text-shadow: 0 0 14px var(--color-gold-glow);
  font-variant-numeric: tabular-nums;
}

.counter-label {
  font-size: 0.78rem;
  color: var(--color-text-dim);
}

.counter-caption {
  text-align: center;
  margin-top: -4px;
}

/* ==========================================================================
   المشهد الأخير
   ========================================================================== */
.final-text {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: clamp(1.05rem, 3vw, 1.3rem);
  font-weight: 500;
}

.fade-line {
  opacity: 0;
  transform: translateY(14px);
  animation: scaleFadeIn var(--transition-medium) forwards;
}

.final-title {
  font-size: clamp(1.8rem, 6vw, 3rem);
  font-weight: 900;
  opacity: 0;
  animation: scaleFadeIn var(--transition-slow) forwards;
}

.glow-text {
  color: var(--color-accent);
  text-shadow: 0 0 18px var(--color-accent-glow), 0 0 36px var(--color-gold-glow);
  animation: scaleFadeIn var(--transition-slow) forwards, glowPulse 3s ease-in-out 1s infinite;
}

@keyframes glowPulse {
  0%, 100% {
    text-shadow: 0 0 18px var(--color-accent-glow), 0 0 36px var(--color-gold-glow);
  }
  50% {
    text-shadow: 0 0 28px var(--color-accent-glow), 0 0 50px var(--color-gold-glow);
  }
}

.final-date {
  color: var(--color-text-dim);
  font-weight: 500;
  opacity: 0;
  animation: scaleFadeIn var(--transition-medium) forwards;
}

.ending-question {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  opacity: 0;
  animation: scaleFadeIn var(--transition-medium) forwards;
}

/* ==========================================================================
   استجابة الشاشات الصغيرة
   ========================================================================== */
@media (max-width: 480px) {
  .scene {
    padding: 24px 16px;
  }

  .counter-grid {
    gap: 8px;
  }

  .counter-box {
    padding: 12px 4px;
  }

  .heart-game-area {
    height: 280px;
  }

  .envelopes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 360px) {
  .envelopes-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
}

/* تقليل الحركة لمن يفضّل ذلك */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}