/* ============================================
   ROMANTIC BIRTHDAY WEBSITE — style.css
   Dark • Romantic • Cinematic • Premium
   ============================================ */

/* ---------- CSS VARIABLES ---------- */
:root {
  --black:       #050508;
  --deep:        #0a080f;
  --dark1:       #100d18;
  --dark2:       #1a1428;
  --pink-soft:   #f7c5d5;
  --pink-mid:    #e8809a;
  --pink-glow:   #d4547a;
  --pink-deep:   #a0315a;
  --gold:        #d4a843;
  --gold-light:  #f0c96a;
  --gold-pale:   #f5e4b8;
  --cream:       #fdf6e8;
  --white:       #ffffff;
  --glass-bg:    rgba(255,255,255,0.04);
  --glass-border:rgba(255,255,255,0.08);
  --glass-pink:  rgba(212,84,122,0.12);
  --shadow-pink: 0 0 40px rgba(212,84,122,0.25);
  --shadow-gold: 0 0 30px rgba(212,168,67,0.2);
  --font-display: 'Playfair Display', serif;
  --font-script:  'Dancing Script', cursive;
  --font-body:    'Lora', serif;
  --font-elegant: 'Cormorant Garamond', serif;
  --transition: cubic-bezier(0.76, 0, 0.24, 1);
  --easeOut: cubic-bezier(0.33, 1, 0.68, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--black);
  color: var(--pink-soft);
  font-family: var(--font-body);
  overflow-x: hidden;
  cursor: default;
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--deep); }
::-webkit-scrollbar-thumb { background: var(--pink-deep); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--pink-glow); }

/* ---------- PARTICLE CANVAS ---------- */
#particleCanvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* ---------- SECTIONS ---------- */
.section {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.9s var(--easeOut);
  z-index: 1;
  overflow: hidden;
}

.section.active {
  opacity: 1;
  pointer-events: all;
}

.section.fade-out {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.7s ease-in;
}

/* ============================================
   SECTION 1 — INTRO
   ============================================ */
#intro {
  background: radial-gradient(ellipse at 50% 60%, #1a0a1e 0%, #050508 70%);
  text-align: center;
  padding: 2rem;
}

.intro-bg-glow {
  position: absolute;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(160,49,90,0.18) 0%, transparent 70%);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  animation: breathe 4s ease-in-out infinite;
  pointer-events: none;
}

@keyframes breathe {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.6; }
  50% { transform: translate(-50%, -50%) scale(1.15); opacity: 1; }
}

.intro-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  width: 100%;
  animation: fadeUp 1.2s var(--easeOut) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}

.intro-top-text {
  font-family: var(--font-script);
  font-size: clamp(0.9rem, 2.5vw, 1.2rem);
  color: var(--gold);
  letter-spacing: 0.2em;
  margin-bottom: 1.2rem;
  opacity: 0.85;
  animation: fadeUp 1s 0.3s both;
}

.intro-title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.1;
  text-shadow: 0 0 60px rgba(212,84,122,0.5), 0 0 120px rgba(212,84,122,0.2);
  margin-bottom: 1.8rem;
  animation: fadeUp 1s 0.5s both;
}

.heart-pulse {
  display: inline-block;
  animation: heartBeat 1.4s ease-in-out infinite;
}

@keyframes heartBeat {
  0%, 100% { transform: scale(1); }
  14% { transform: scale(1.18); }
  28% { transform: scale(1); }
  42% { transform: scale(1.12); }
  56% { transform: scale(1); }
}

.typewriter-text {
  font-family: var(--font-elegant);
  font-style: italic;
  font-size: clamp(1rem, 3vw, 1.4rem);
  color: var(--pink-soft);
  line-height: 1.8;
  min-height: 3.2em;
  margin-bottom: 2rem;
  opacity: 0.9;
  animation: fadeUp 1s 0.8s both;
}

.typewriter-cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background: var(--pink-mid);
  margin-left: 2px;
  vertical-align: middle;
  animation: blink 0.8s step-end infinite;
}

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

.intro-divider {
  width: 80px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin: 0 auto 2rem;
  animation: fadeUp 1s 1s both;
}

/* ---------- BUTTONS ---------- */
.btn-primary {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2.4rem;
  background: linear-gradient(135deg, var(--pink-deep) 0%, var(--pink-glow) 100%);
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50px;
  font-family: var(--font-display);
  font-size: clamp(0.95rem, 2.5vw, 1.1rem);
  font-weight: 600;
  letter-spacing: 0.03em;
  cursor: pointer;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(160,49,90,0.4), 0 0 0 0 rgba(212,84,122,0.3);
  transition: transform 0.3s var(--easeOut), box-shadow 0.3s ease;
  animation: fadeUp 1s 1.2s both;
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 16px 48px rgba(160,49,90,0.55), 0 0 30px rgba(212,84,122,0.3);
}

.btn-primary:active { transform: scale(0.97); }

.btn-shine {
  position: absolute;
  top: 0; left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,0.25), transparent);
  animation: shine 3s ease-in-out infinite;
}

@keyframes shine {
  0% { left: -100%; }
  30%, 100% { left: 150%; }
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  background: transparent;
  color: var(--gold);
  border: 1px solid var(--gold);
  border-radius: 50px;
  font-family: var(--font-display);
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  letter-spacing: 0.05em;
}

.btn-secondary:hover {
  background: var(--gold);
  color: var(--black);
  box-shadow: var(--shadow-gold);
  transform: translateY(-2px);
}

/* ---------- MUSIC BUTTON ---------- */
.music-btn {
  position: absolute;
  bottom: 2rem; right: 2rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.2rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  color: var(--pink-soft);
  font-family: var(--font-body);
  font-size: 0.85rem;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
  z-index: 10;
}

.music-btn:hover { background: var(--glass-pink); border-color: var(--pink-mid); }
.music-btn.playing .music-icon { animation: spin 2s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.music-icon { font-size: 1.1rem; }

.scroll-hint {
  position: absolute;
  bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-elegant);
  font-size: 0.8rem;
  color: rgba(247,197,213,0.4);
  letter-spacing: 0.2em;
  animation: floatHint 2s ease-in-out infinite;
}

@keyframes floatHint {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.4; }
  50% { transform: translateX(-50%) translateY(-6px); opacity: 0.7; }
}

/* ============================================
   SECTION 2 — GIFT BOX
   ============================================ */
#giftSection {
  background: radial-gradient(ellipse at 50% 50%, #150b20 0%, #050508 65%);
}

.gift-bg-glow {
  position: absolute;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(160,49,90,0.12) 0%, transparent 70%);
  border-radius: 50%;
  animation: breathe 3.5s ease-in-out infinite;
}

.gift-area {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.gift-prompt {
  font-family: var(--font-elegant);
  font-style: italic;
  font-size: clamp(1rem, 3vw, 1.3rem);
  color: var(--gold-pale);
  opacity: 0.8;
  letter-spacing: 0.05em;
}

/* -- Gift Box -- */
.gift-wrapper {
  position: relative;
  width: clamp(140px, 28vw, 200px);
  cursor: pointer;
  animation: floatGift 3s ease-in-out infinite;
  filter: drop-shadow(0 20px 50px rgba(160,49,90,0.4));
  transition: transform 0.2s ease;
}

.gift-wrapper:hover { transform: scale(1.05) translateY(-5px); }
.gift-wrapper:active { transform: scale(0.95); }

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

.gift-lid {
  position: relative;
  width: 100%;
  height: clamp(40px, 8vw, 60px);
  background: linear-gradient(135deg, #c0395a 0%, #8b1a3a 100%);
  border-radius: 4px 4px 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transform-origin: bottom center;
  transition: transform 0.8s var(--easeOut);
  z-index: 2;
}

.gift-lid.open {
  transform: rotateX(-140deg) translateY(-10px);
}

.ribbon-h {
  position: absolute;
  width: 100%;
  height: 14%;
  background: linear-gradient(180deg, var(--gold-light), var(--gold));
  top: 50%;
  transform: translateY(-50%);
}

.ribbon-bow {
  position: absolute;
  top: -28px;
  display: flex;
  align-items: center;
}

.bow-left, .bow-right {
  width: 32px; height: 22px;
  background: linear-gradient(135deg, var(--gold-light), var(--gold));
  border-radius: 50% 0 50% 0;
}

.bow-left  { transform: rotate(-30deg) translateX(6px); }
.bow-right { transform: rotate(30deg) translateX(-6px); }

.bow-center {
  width: 16px; height: 16px;
  background: var(--gold-light);
  border-radius: 50%;
  z-index: 1;
}

.gift-body {
  width: 100%;
  height: clamp(120px, 24vw, 175px);
  background: linear-gradient(135deg, #b0304e 0%, #7a1530 100%);
  border-radius: 0 0 6px 6px;
  position: relative;
  overflow: hidden;
}

.ribbon-v {
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 14%;
  background: linear-gradient(90deg, var(--gold-light), var(--gold));
  transform: translateX(-50%);
}

.gift-shine {
  position: absolute;
  top: 10%; left: 10%;
  width: 25%; height: 35%;
  background: rgba(255,255,255,0.12);
  border-radius: 50%;
  filter: blur(4px);
}

.gift-tap-hint {
  font-family: var(--font-script);
  font-size: clamp(1rem, 3vw, 1.2rem);
  color: var(--pink-soft);
  opacity: 0.75;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.95; }
}

/* -- Confetti -- */
.confetti-piece {
  position: fixed;
  width: 10px; height: 10px;
  top: 40%;
  pointer-events: none;
  z-index: 100;
  border-radius: 2px;
  animation: confettiFall var(--fall-dur, 2.5s) var(--fall-delay, 0s) ease-out forwards;
}

@keyframes confettiFall {
  0% {
    transform: translate(0, 0) rotate(0deg) scale(1);
    opacity: 1;
  }
  100% {
    transform: translate(var(--tx, 100px), 90vh) rotate(var(--rot, 360deg)) scale(0.5);
    opacity: 0;
  }
}

/* ============================================
   SECTION 3 — SCRAPBOOK
   ============================================ */
#scrapbook {
  position: relative;
  height: auto;
  min-height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  display: block;
  padding: 0 0 4rem;
  background: radial-gradient(ellipse at 30% 20%, #140a1e 0%, #050508 60%),
              radial-gradient(ellipse at 70% 80%, #0e0818 0%, transparent 50%);
}

.scrapbook-header {
  text-align: center;
  padding: 4rem 2rem 2rem;
  position: relative;
}

.scrapbook-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.5rem);
  color: var(--white);
  text-shadow: var(--shadow-pink);
  margin-bottom: 0.7rem;
}

.scrapbook-subtitle {
  font-family: var(--font-elegant);
  font-style: italic;
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--gold);
  opacity: 0.8;
}

.scrapbook-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 2rem 4rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 3rem 2.5rem;
  align-items: start;
}

/* -- Memory Cards -- */
.memory-card {
  position: relative;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s var(--easeOut), transform 0.7s var(--easeOut);
}

.memory-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.card-tilt-left  { transform: rotate(-2deg) translateY(40px); }
.card-tilt-right { transform: rotate(2deg) translateY(40px); }
.card-center     { transform: translateY(40px); }

.memory-card.visible.card-tilt-left  { transform: rotate(-2deg); }
.memory-card.visible.card-tilt-right { transform: rotate(2deg); }
.memory-card.visible.card-center     { transform: rotate(0deg); }

/* -- Polaroid -- */
.polaroid {
  background: var(--cream);
  padding: 14px 14px 40px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.5), 0 2px 8px rgba(0,0,0,0.3);
  transition: transform 0.3s ease;
}

.polaroid:hover { transform: scale(1.02) rotate(0deg) !important; }

.photo-placeholder {
  width: 100%;
  padding-top: 85%;
  position: relative;
  overflow: hidden;
}

.photo-1 { background: linear-gradient(135deg, #2d1040 0%, #5a1a3a 50%, #8b2050 100%); }
.photo-2 { background: linear-gradient(135deg, #1a2040 0%, #2a4060 50%, #3a6080 100%); }
.photo-3 { background: linear-gradient(135deg, #1a3020 0%, #2a5030 50%, #4a7040 100%); }

.photo-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.15);
}

.photo-emoji { font-size: 3.5rem; }

.polaroid-caption {
  font-family: var(--font-script);
  font-size: 1.05rem;
  color: #5a3a4a;
  text-align: center;
  margin-top: 0.6rem;
  line-height: 1.4;
}

/* -- Sticky Notes -- */
.sticky-note {
  padding: 1rem 1.2rem;
  margin-top: 1rem;
  box-shadow: 2px 4px 12px rgba(0,0,0,0.3);
  position: relative;
}

.note-pink {
  background: linear-gradient(135deg, #f9d4de, #f5b8c8);
  transform: rotate(1deg);
}

.note-yellow {
  background: linear-gradient(135deg, #fff3a3, #ffe880);
  transform: rotate(-1deg);
}

.sticky-note p {
  font-family: var(--font-script);
  font-size: 1rem;
  color: #4a2a35;
  line-height: 1.7;
}

.sticky-note em { font-style: italic; }

/* -- Tape -- */
.tape {
  position: absolute;
  width: 50px; height: 18px;
  background: rgba(255, 250, 220, 0.55);
  border: 1px solid rgba(255,240,180,0.4);
  backdrop-filter: blur(2px);
  z-index: 10;
}

.tape-top-left  { top: -9px; left: 20%; transform: rotate(-12deg); }
.tape-top-right { top: -9px; right: 20%; transform: rotate(10deg); }
.tape-bottom-left { bottom: -9px; left: 20%; transform: rotate(-8deg); }

/* -- Chat Card -- */
.chat-bubble-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  overflow: hidden;
  backdrop-filter: blur(12px);
}

.chat-header {
  background: linear-gradient(135deg, var(--pink-deep), var(--dark2));
  padding: 0.8rem 1.2rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--pink-soft);
  letter-spacing: 0.05em;
}

.chat-messages {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.chat-msg {
  max-width: 80%;
  padding: 0.55rem 0.9rem;
  border-radius: 16px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.5;
  animation: msgPop 0.4s var(--easeOut) both;
}

.msg-them {
  background: rgba(255,255,255,0.08);
  color: var(--pink-soft);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.msg-me {
  background: linear-gradient(135deg, var(--pink-deep), var(--pink-glow));
  color: var(--white);
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

@keyframes msgPop {
  from { transform: scale(0.8); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

/* -- Reasons Card -- */
.reasons-card {
  grid-column: 1 / -1;
  max-width: 600px;
  margin: 0 auto;
  width: 100%;
}

.reasons-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  color: var(--white);
  text-align: center;
  margin-bottom: 1.5rem;
  text-shadow: var(--shadow-pink);
}

.reasons-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.reason-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1.2rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
}

.reason-item:hover {
  background: var(--glass-pink);
  border-color: var(--pink-deep);
  transform: translateX(6px);
}

.reason-icon {
  font-size: 1.2rem;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.reason-item:hover .reason-icon { transform: scale(1.3) rotate(10deg); }

.reason-text {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--pink-soft);
  flex: 1;
}

.secret-msg {
  display: none;
  width: 100%;
  font-family: var(--font-script);
  font-size: 1rem;
  color: var(--gold-light);
  padding-top: 0.5rem;
  padding-left: 2rem;
  animation: fadeUp 0.4s var(--easeOut);
}

.reason-item.revealed {
  background: linear-gradient(135deg, rgba(160,49,90,0.2), rgba(212,168,67,0.08));
  border-color: var(--pink-mid);
}

.reason-item.revealed .secret-msg { display: block; }

.reasons-hint {
  text-align: center;
  font-family: var(--font-elegant);
  font-style: italic;
  font-size: 0.85rem;
  color: rgba(247,197,213,0.5);
  margin-top: 1.2rem;
}

/* -- Mid Surprise -- */
.mid-surprise {
  text-align: center;
  padding: 6rem 2rem;
  position: relative;
}

.mid-surprise-inner {
  position: relative;
  max-width: 560px;
  margin: 0 auto;
  padding: 3.5rem;
  background: rgba(10,8,15,0.85);
  border: 1px solid rgba(212,84,122,0.2);
  border-radius: 20px;
  backdrop-filter: blur(20px);
  box-shadow: 0 30px 80px rgba(0,0,0,0.6), var(--shadow-pink);
}

.mid-surprise-glow {
  position: absolute;
  inset: -2px;
  border-radius: 22px;
  background: linear-gradient(135deg, var(--pink-deep), transparent, var(--gold));
  opacity: 0.15;
  z-index: -1;
}

.mid-surprise-eyebrow {
  font-family: var(--font-elegant);
  font-style: italic;
  font-size: 1rem;
  color: var(--gold);
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
  opacity: 0.8;
}

.mid-surprise-text {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  color: var(--white);
  text-shadow: var(--shadow-pink);
  margin-bottom: 1rem;
}

.mid-surprise-sub {
  font-family: var(--font-elegant);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--pink-soft);
  opacity: 0.75;
  margin-bottom: 2rem;
}

.btn-letter {
  background: linear-gradient(135deg, #7a1530 0%, var(--pink-glow) 100%);
}

/* ============================================
   SECTION 4 — LETTER
   ============================================ */
#letterSection {
  background: radial-gradient(ellipse at 50% 30%, #12081c 0%, #050508 60%);
  overflow-y: auto;
  display: block;
  height: auto;
  min-height: 100vh;
  padding: 4rem 2rem;
}

.letter-outer {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

/* -- Envelope -- */
.letter-envelope {
  width: 200px;
  cursor: pointer;
  margin-bottom: 1rem;
}

.envelope-body {
  width: 100%;
  padding-top: 65%;
  background: linear-gradient(135deg, #d4a843, #a07030);
  border-radius: 4px;
  position: relative;
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

.envelope-flap {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 50%;
  background: linear-gradient(160deg, #c09030, #e0b85a);
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  transform-origin: top;
  transition: transform 0.6s var(--easeOut);
}

.envelope-flap.open {
  transform: rotateX(-160deg);
}

.envelope-heart {
  position: absolute;
  bottom: 25%;
  left: 50%;
  transform: translateX(-50%);
  font-size: 1.5rem;
  animation: heartBeat 1.4s ease-in-out infinite;
}

/* -- Letter Paper -- */
.letter-paper {
  width: 100%;
  background: linear-gradient(160deg, #fdf6e8 0%, #f8edd4 100%);
  border-radius: 4px;
  padding: 3.5rem clamp(1.5rem, 5vw, 3.5rem);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 4px 15px rgba(0,0,0,0.2);
  position: relative;
  opacity: 0;
  transform: translateY(30px) scale(0.97);
  transition: opacity 0.8s var(--easeOut), transform 0.8s var(--easeOut);
}

.letter-paper.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Paper line texture */
.letter-paper::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 28px,
    rgba(180,140,100,0.12) 28px,
    rgba(180,140,100,0.12) 29px
  );
  border-radius: inherit;
  pointer-events: none;
}

.letter-paper-inner { position: relative; z-index: 1; }

.letter-watermark {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 12rem;
  color: rgba(200,120,140,0.06);
  font-family: serif;
  pointer-events: none;
  user-select: none;
}

.letter-date {
  font-family: var(--font-script);
  font-size: 1rem;
  color: #9a6a50;
  text-align: right;
  margin-bottom: 0.5rem;
}

.letter-heading {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 5vw, 2.3rem);
  font-style: italic;
  color: #5a2a35;
  text-align: center;
  margin-bottom: 1.2rem;
}

.letter-divider-line {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(160,80,80,0.3), transparent);
  margin-bottom: 1.8rem;
}

.letter-body {
  font-family: var(--font-script);
  font-size: clamp(1.05rem, 2.5vw, 1.2rem);
  color: #4a2a30;
  line-height: 2;
  min-height: 6em;
}

.letter-body .letter-line {
  display: block;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.letter-body .letter-line.visible {
  opacity: 1;
  transform: translateY(0);
}

.letter-signature {
  font-family: var(--font-script);
  font-size: 1.6rem;
  color: #7a3040;
  text-align: right;
  margin-top: 2.5rem;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.letter-signature.visible { opacity: 1; }

.letter-final-line {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  color: #8a3848;
  text-align: center;
  margin-top: 1.5rem;
  opacity: 0;
  transition: opacity 1s ease;
  text-shadow: 0 0 30px rgba(160,49,90,0.2);
}

.letter-final-line.visible { opacity: 1; }

/* -- Letter Ending -- */
.letter-ending {
  text-align: center;
  padding: 2rem 0 3rem;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.9s var(--easeOut), transform 0.9s var(--easeOut);
}

.letter-ending.visible {
  opacity: 1;
  transform: translateY(0);
}

.final-hearts { height: 60px; position: relative; margin-bottom: 2rem; }

.final-heart-anim {
  position: absolute;
  font-size: 1.5rem;
  animation: heartFloat var(--dur, 3s) ease-in-out infinite;
  animation-delay: var(--delay, 0s);
}

@keyframes heartFloat {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.7; }
  50% { transform: translateY(-20px) scale(1.15); opacity: 1; }
}

.final-photo-frame {
  display: inline-block;
  padding: 16px 16px 50px;
  background: var(--cream);
  box-shadow: 0 15px 40px rgba(0,0,0,0.5);
  margin-bottom: 2rem;
  transform: rotate(-1deg);
}

.final-photo {
  width: clamp(200px, 60vw, 320px);
  height: clamp(150px, 40vw, 240px);
  background: linear-gradient(135deg, #2d1040 0%, #5a1030 40%, #8b2050 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.final-photo-emoji { font-size: 4rem; }

.final-photo-text {
  font-family: var(--font-script);
  font-size: 1.2rem;
  color: var(--pink-soft);
}

.final-tagline {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 4vw, 1.8rem);
  font-style: italic;
  color: var(--white);
  text-shadow: var(--shadow-pink);
  margin-bottom: 2rem;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .scrapbook-container {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding: 1.5rem;
  }
  .reasons-card { grid-column: 1; }
  .mid-surprise-inner { padding: 2rem 1.5rem; }
  .music-btn { bottom: 1.2rem; right: 1.2rem; }
  .letter-paper { padding: 2rem 1.5rem; }
  .card-tilt-left, .card-tilt-right { transform: rotate(0deg) translateY(40px) !important; }
  .memory-card.visible.card-tilt-left,
  .memory-card.visible.card-tilt-right { transform: rotate(0deg) !important; }
}

@media (max-width: 480px) {
  .intro-title { font-size: 2.4rem; }
  .gift-wrapper { width: 130px; }
  .scrapbook-title { font-size: 1.8rem; }
  .reasons-list { gap: 0.6rem; }
  .reason-item { padding: 0.7rem 0.9rem; }
  .letter-heading { font-size: 1.6rem; }
}

@media (min-width: 1200px) {
  .scrapbook-container {
    grid-template-columns: repeat(3, 1fr);
  }
  .reasons-card { grid-column: 1 / -1; }
}

/* ============================================
   TRANSITION OVERLAYS
   ============================================ */
.section-transition {
  position: fixed;
  inset: 0;
  background: var(--black);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
}

.section-transition.in {
  opacity: 1;
  pointer-events: all;
}