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

:root {
  --gold: #d4a853;
  --gold-light: #f0d68a;
  --rose: #e8a0b4;
  --rose-light: #f5c6d0;
  --blush: #fdf2f0;
  --cream: #fef9f3;
  --warm-white: #fffdf9;
  --text-dark: #2c1810;
  --text-medium: #5a3e2b;
  --text-light: #8b6f5e;
  --bg-dark: #1a0e1e;
  --bg-dark-secondary: #2d1b36;
  --font-script: 'Dancing Script', cursive;
  --font-display: 'Playfair Display', serif;
  --font-body: 'Lato', sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--text-dark);
  background: var(--warm-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.hidden {
  display: none !important;
}

/* ==================== CONFETTI CANVAS ==================== */
#confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
}

/* ==================== INTRO SECTION ==================== */
.intro {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at center, var(--bg-dark-secondary) 0%, var(--bg-dark) 70%);
  overflow: hidden;
}

.intro::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(2px 2px at 20% 30%, rgba(255, 255, 255, 0.3), transparent),
    radial-gradient(2px 2px at 40% 70%, rgba(255, 255, 255, 0.2), transparent),
    radial-gradient(1px 1px at 60% 20%, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(1px 1px at 80% 50%, rgba(255, 255, 255, 0.3), transparent),
    radial-gradient(2px 2px at 10% 80%, rgba(255, 255, 255, 0.2), transparent),
    radial-gradient(1px 1px at 70% 90%, rgba(255, 255, 255, 0.3), transparent),
    radial-gradient(2px 2px at 90% 10%, rgba(255, 255, 255, 0.2), transparent),
    radial-gradient(1px 1px at 50% 50%, rgba(255, 255, 255, 0.4), transparent);
  animation: twinkle 4s ease-in-out infinite alternate;
}

@keyframes twinkle {
  0% { opacity: 0.5; }
  100% { opacity: 1; }
}

.envelope-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  z-index: 1;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.envelope {
  width: 280px;
  height: 180px;
  position: relative;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.envelope:hover {
  transform: scale(1.05);
}

.envelope-body {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #f5e6d3 0%, #e8d5c0 100%);
  border-radius: 0 0 8px 8px;
  position: relative;
  box-shadow:
    0 10px 40px rgba(0, 0, 0, 0.3),
    0 0 60px rgba(212, 168, 83, 0.15);
  overflow: hidden;
}

.envelope-body::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60%;
  background: linear-gradient(135deg, #eddcc9 0%, #e0cdb8 100%);
  clip-path: polygon(0 40%, 50% 0, 100% 40%, 100% 100%, 0 100%);
}

.envelope-flap {
  width: 100%;
  height: 50%;
  position: absolute;
  top: 0;
  left: 0;
  background: linear-gradient(180deg, #e8d5c0 0%, #dcc7b0 100%);
  clip-path: polygon(0 0, 50% 100%, 100% 0);
  z-index: 2;
  transform-origin: top center;
  transition: transform 0.6s ease;
}

.envelope.opened .envelope-flap {
  transform: rotateX(180deg);
}

.envelope-letter {
  position: absolute;
  top: 20%;
  left: 10%;
  right: 10%;
  bottom: 20%;
  background: white;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  transition: transform 0.6s ease 0.3s;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.envelope.opened .envelope-letter {
  transform: translateY(-60px);
}

.envelope-letter span {
  font-family: var(--font-script);
  font-size: 1rem;
  color: var(--text-medium);
  text-align: center;
  padding: 0.5rem;
}

.open-btn {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-light);
  background: transparent;
  border: 1px solid var(--gold);
  padding: 0.8rem 2.5rem;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.open-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
  z-index: -1;
}

.open-btn:hover {
  color: var(--bg-dark);
}

.open-btn:hover::before {
  transform: scaleX(1);
}

/* ==================== BIRTHDAY HERO ==================== */
.birthday-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--blush) 0%, var(--cream) 50%, #f9ede4 100%);
  position: relative;
  overflow: hidden;
}

.birthday-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(232, 160, 180, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(212, 168, 83, 0.1) 0%, transparent 40%),
    radial-gradient(circle at 60% 80%, rgba(232, 160, 180, 0.1) 0%, transparent 40%);
}

.hero-content {
  text-align: center;
  z-index: 1;
  padding: 2rem;
}

.birthday-title {
  font-family: var(--font-script);
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 700;
  color: var(--text-dark);
  line-height: 1.2;
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeInUp 1s ease forwards;
  background: linear-gradient(135deg, var(--text-dark) 0%, #8b4557 50%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.birthday-subtitle {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 3vw, 1.6rem);
  font-weight: 400;
  font-style: italic;
  color: var(--text-light);
  opacity: 0;
  animation: fadeInUp 1s ease 0.4s forwards;
}

.scroll-hint {
  margin-top: 4rem;
  opacity: 0;
  animation: fadeInUp 1s ease 0.8s forwards;
}

.scroll-hint span {
  font-size: 0.85rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--text-light);
  text-transform: uppercase;
}

.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--text-light);
  border-bottom: 2px solid var(--text-light);
  transform: rotate(45deg);
  margin: 1rem auto 0;
  animation: bounce 2s ease infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: rotate(45deg) translateY(0); }
  40% { transform: rotate(45deg) translateY(8px); }
  60% { transform: rotate(45deg) translateY(4px); }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==================== GAME SECTION ==================== */
.game-section {
  padding: 4rem 2rem;
  background: linear-gradient(180deg, var(--cream) 0%, var(--warm-white) 100%);
  display: flex;
  justify-content: center;
}

.game-wrapper {
  max-width: 500px;
  width: 100%;
  text-align: center;
}

.game-title {
  font-family: var(--font-script);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--text-dark);
  margin-bottom: 0.5rem;
}

.game-instruction {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--text-light);
  margin-bottom: 1.5rem;
}

.game-hud {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.game-score {
  font-family: var(--font-body);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: 0.3rem;
  white-space: nowrap;
}

.score-icon {
  color: #e74c6f;
  font-size: 1.3rem;
}

.score-divider {
  color: var(--text-light);
  font-weight: 300;
}

.game-progress {
  flex: 1;
  height: 8px;
  background: rgba(0, 0, 0, 0.06);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--rose), var(--gold));
  border-radius: 4px;
  transition: width 0.3s ease;
}

.game-area {
  width: 100%;
  height: 350px;
  background: linear-gradient(180deg, #fdf6f0 0%, #fef9f5 100%);
  border: 2px solid rgba(212, 168, 83, 0.2);
  border-radius: 16px;
  position: relative;
  overflow: hidden;
  cursor: crosshair;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}

.heart {
  position: absolute;
  font-size: 2rem;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  transition: transform 0.1s;
  animation: heartPulse 0.6s ease-in-out infinite alternate;
  z-index: 1;
  line-height: 1;
}

.heart:active {
  transform: scale(0.8);
}

@keyframes heartPulse {
  from { transform: scale(1); }
  to { transform: scale(1.15); }
}

.heart-caught {
  animation: heartCaught 0.4s ease forwards !important;
  pointer-events: none;
}

@keyframes heartCaught {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.8); opacity: 0.6; }
  100% { transform: scale(0); opacity: 0; }
}

.heart-miss {
  animation: heartMiss 0.3s ease forwards !important;
  pointer-events: none;
}

@keyframes heartMiss {
  to { opacity: 0; transform: translateY(20px) scale(0.5); }
}

.game-start-overlay,
.game-win-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(253, 246, 240, 0.9);
  z-index: 5;
  border-radius: 14px;
}

.start-game-btn {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: white;
  background: linear-gradient(135deg, var(--rose) 0%, #d4728a 100%);
  border: none;
  padding: 0.9rem 2.5rem;
  border-radius: 2rem;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 15px rgba(232, 160, 180, 0.4);
}

.start-game-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(232, 160, 180, 0.5);
}

.win-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  animation: fadeInUp 0.6s ease;
}

.win-icon {
  font-size: 3rem;
  color: #e74c6f;
  animation: heartPulse 0.6s ease-in-out infinite alternate;
}

.win-text {
  font-family: var(--font-script);
  font-size: 1.8rem;
  color: var(--text-dark);
}

/* ==================== TIMELINE LOCK ==================== */
.timeline-lock {
  position: absolute;
  inset: 0;
  background: rgba(255, 253, 249, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: opacity 0.6s ease;
}

.timeline-lock.unlocked {
  opacity: 0;
  pointer-events: none;
}

.lock-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
  padding: 2rem;
}

.lock-icon {
  font-size: 2.5rem;
  opacity: 0.5;
}

.lock-text {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1rem;
  color: var(--text-light);
}

/* ==================== TIMELINE SECTION ==================== */
.timeline-section {
  padding: 6rem 2rem;
  background: var(--warm-white);
  position: relative;
}

.section-title {
  font-family: var(--font-script);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  text-align: center;
  color: var(--text-dark);
  margin-bottom: 4rem;
}

.timeline {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

.timeline-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, transparent, var(--gold), var(--rose), var(--gold), transparent);
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 4rem;
  position: relative;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.timeline-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.timeline-item:nth-child(odd) {
  flex-direction: row;
  padding-right: calc(50% + 2rem);
}

.timeline-item:nth-child(even) {
  flex-direction: row-reverse;
  padding-left: calc(50% + 2rem);
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 1.5rem;
  width: 14px;
  height: 14px;
  background: var(--gold);
  border: 3px solid var(--warm-white);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 0 3px var(--gold);
  z-index: 1;
}

.timeline-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  width: 100%;
}

.timeline-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.card-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  cursor: pointer;
  position: relative;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

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

.image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #f0e6dc 0%, #e8d8c8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-placeholder span {
  font-family: var(--font-display);
  font-size: 1rem;
  font-style: italic;
  color: var(--text-light);
  opacity: 0.6;
}

.card-content {
  padding: 1.5rem;
}

.card-date {
  font-family: var(--font-script);
  font-size: 1.3rem;
  color: var(--gold);
  display: block;
  margin-bottom: 0.5rem;
}

.card-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-medium);
  font-weight: 300;
}

/* ==================== WISHES SECTION ==================== */
.wishes-section {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 2rem;
  background: linear-gradient(135deg, var(--blush) 0%, var(--cream) 100%);
  position: relative;
  overflow: hidden;
}

.wishes-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 40%, rgba(212, 168, 83, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 70% 60%, rgba(232, 160, 180, 0.08) 0%, transparent 50%);
}

.wishes-content {
  max-width: 600px;
  text-align: center;
  z-index: 1;
}

.wishes-title {
  font-family: var(--font-script);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 2rem;
}

.wishes-text {
  font-family: var(--font-display);
  font-size: 1.15rem;
  line-height: 1.9;
  color: var(--text-medium);
  font-weight: 400;
  margin-bottom: 1.5rem;
}

.wishes-signature {
  margin-top: 3rem;
  margin-bottom: 2rem;
}

.wishes-signature span {
  font-family: var(--font-script);
  font-size: 1.5rem;
  color: var(--gold);
}

.replay-btn {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-medium);
  background: transparent;
  border: 1px solid var(--rose);
  padding: 0.7rem 2rem;
  cursor: pointer;
  border-radius: 2rem;
  transition: all 0.3s ease;
}

.replay-btn:hover {
  background: var(--rose);
  color: white;
}

/* ==================== LIGHTBOX ==================== */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.lightbox.hidden {
  display: none !important;
}

.lightbox.active {
  opacity: 1;
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.2s;
}

.lightbox-close:hover {
  opacity: 0.7;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: white;
  font-size: 2.5rem;
  cursor: pointer;
  padding: 1rem;
  transition: opacity 0.2s;
}

.lightbox-nav:hover {
  opacity: 0.7;
}

.lightbox-prev {
  left: 1rem;
}

.lightbox-next {
  right: 1rem;
}

.lightbox-content {
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox-img {
  max-width: 100%;
  max-height: 75vh;
  object-fit: contain;
  border-radius: 4px;
}

.lightbox-caption {
  color: rgba(255, 255, 255, 0.8);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1rem;
  margin-top: 1rem;
  text-align: center;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
  .envelope {
    width: 240px;
    height: 155px;
  }

  .timeline-line {
    left: 1.5rem;
  }

  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    flex-direction: row;
    padding-right: 0;
    padding-left: 3.5rem;
  }

  .timeline-dot {
    left: 1.5rem;
  }

  .lightbox-nav {
    font-size: 1.5rem;
    padding: 0.5rem;
  }

  .lightbox-prev {
    left: 0.5rem;
  }

  .lightbox-next {
    right: 0.5rem;
  }
}

@media (max-width: 480px) {
  .envelope {
    width: 200px;
    height: 130px;
  }

  .envelope-letter span {
    font-size: 0.85rem;
  }

  .timeline-section {
    padding: 4rem 1rem;
  }

  .timeline-item {
    margin-bottom: 3rem;
  }

  .card-content {
    padding: 1rem;
  }

  .wishes-section {
    padding: 4rem 1.5rem;
  }
}