/* ================================================================
   BIRTHDAY GALLERY — style.css
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Pacifico&family=Nunito:ital,wght@0,300;0,400;0,600;0,700;0,800;1,400&display=swap');

/* ── Custom Properties ── */
:root {
  --c-bg:       #07031a;
  --c-surface:  #100628;
  --c-gold:     #FFD54F;
  --c-gold2:    #FFE082;
  --c-pink:     #F472B6;
  --c-lav:      #C084FC;
  --c-cyan:     #67E8F9;
  --c-white:    #FFFFFF;
  --c-text:     #EDE9FE;
  --c-muted:    #9D79C9;

  --card-w:     300px;
  --card-h:     400px;
  --card-gap:   28px;
  --radius:     18px;
  --ease:       cubic-bezier(0.22, 1, 0.36, 1);
  --spring:     cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { overflow-x: hidden; }
body {
  font-family: 'Nunito', sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  min-height: 100dvh;
  overflow-x: hidden;
  position: relative;
}
img   { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }

/* Subtle noise grain over the whole page */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
  opacity: 0.4;
}

/* Confetti canvas */
#confetti-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9000;
}

/* ================================================================
   DECORATIONS
   ================================================================ */
.deco-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.balloon {
  position: absolute;
  bottom: -90px;
  font-size: 38px;
  line-height: 1;
  animation: balloonRise linear infinite;
  will-change: transform, opacity;
}
@keyframes balloonRise {
  0%   { transform: translateY(0)        rotate(-4deg); opacity: 0.65; }
  20%  { transform: translateY(-20dvh)   rotate( 5deg); opacity: 0.65; }
  40%  { transform: translateY(-40dvh)   rotate(-3deg); opacity: 0.6; }
  60%  { transform: translateY(-60dvh)   rotate( 4deg); opacity: 0.5; }
  80%  { transform: translateY(-80dvh)   rotate(-2deg); opacity: 0.35; }
  100% { transform: translateY(-115dvh)  rotate( 3deg); opacity: 0; }
}

.star-deco {
  position: absolute;
  font-size: 22px;
  animation: starTwinkle 3.8s ease-in-out infinite;
  opacity: 0.4;
}
@keyframes starTwinkle {
  0%,100% { opacity: 0.25; transform: scale(1)   rotate(0deg); }
  50%     { opacity: 0.9;  transform: scale(1.45) rotate(18deg); }
}

/* ================================================================
   HEADER
   ================================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 40px;
  background: linear-gradient(180deg, rgba(7,3,26,0.96) 0%, transparent 100%);
}
.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 28px;
}
.brand-name {
  font-family: 'Pacifico', cursive;
  font-size: 22px;
  color: var(--c-gold);
  text-shadow: 0 0 30px rgba(255,213,79,0.45);
}

/* Music button */
.music-btn {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 2px solid rgba(255,213,79,0.3);
  background: rgba(255,213,79,0.07);
  color: var(--c-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s, border-color 0.3s, transform 0.3s var(--spring);
}
.music-btn:hover {
  background: rgba(255,213,79,0.18);
  border-color: var(--c-gold);
  transform: scale(1.1);
}
.music-bars {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 18px;
}
.music-bars span {
  width: 3px;
  border-radius: 2px;
  background: var(--c-gold);
  transition: height 0.15s ease;
}
.music-bars span:nth-child(1) { height: 8px; }
.music-bars span:nth-child(2) { height: 14px; }
.music-bars span:nth-child(3) { height: 10px; }

.music-btn.playing .music-bars span:nth-child(1) { animation: mb1 0.55s ease-in-out infinite alternate; }
.music-btn.playing .music-bars span:nth-child(2) { animation: mb2 0.55s ease-in-out infinite alternate 0.12s; }
.music-btn.playing .music-bars span:nth-child(3) { animation: mb3 0.55s ease-in-out infinite alternate 0.22s; }
@keyframes mb1 { 0%{height:4px;}  100%{height:16px;} }
@keyframes mb2 { 0%{height:14px;} 100%{height:5px;}  }
@keyframes mb3 { 0%{height:6px;}  100%{height:15px;} }

/* ================================================================
   HERO
   ================================================================ */
.hero {
  position: relative;
  z-index: 2;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px 60px;
}
.hero-eyebrow {
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--c-gold);
  margin-bottom: 20px;
}
.hero-title {
  font-family: 'Pacifico', cursive;
  display: flex;
  flex-direction: column;
  line-height: 0.84;
  margin-bottom: 28px;
}
.hero-happy {
  font-size: clamp(72px, 14vw, 140px);
  color: var(--c-gold);
  text-shadow: 0 0 80px rgba(255,213,79,0.35), 0 6px 32px rgba(0,0,0,0.45);
}
.hero-bday {
  font-size: clamp(80px, 16vw, 160px);
  background: linear-gradient(135deg, var(--c-pink) 0%, var(--c-lav) 50%, var(--c-pink) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShimmer 5s linear infinite;
  filter: drop-shadow(0 0 40px rgba(244,114,182,0.35));
}
@keyframes gradientShimmer {
  0%   { background-position: 0%   50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0%   50%; }
}
.hero-desc {
  font-size: 17px;
  color: var(--c-muted);
  max-width: 520px;
  line-height: 1.6;
  margin-bottom: 48px;
}
.drag-hint {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  color: var(--c-muted);
  letter-spacing: 0.06em;
  animation: hintFloat 3s ease-in-out infinite;
}
.hint-arrow { color: var(--c-gold); font-size: 16px; }
.hint-dot   { opacity: 0.35; }
@keyframes hintFloat {
  0%,100% { transform: translateY(0); }
  50%     { transform: translateY(-6px); }
}

/* ================================================================
   GALLERY
   ================================================================ */
.gallery-wrap {
  position: relative;
  z-index: 2;
  padding: 60px 0 80px;
  overflow-x: scroll;
  overflow-y: visible;
  scrollbar-width: none;
  cursor: grab;
  -webkit-overflow-scrolling: touch;
}
.gallery-wrap::-webkit-scrollbar { display: none; }
.gallery-wrap.is-dragging { cursor: grabbing; }

.gallery-track {
  display: flex;
  gap: var(--card-gap);
  padding: 40px 120px;
  width: max-content;
  will-change: transform;
  align-items: center;
}

/* ── Photo Cards ── */
.photo-card {
  position: relative;
  width: var(--card-w);
  height: var(--card-h);
  flex-shrink: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-surface);
  transition: transform 0.5s var(--spring), box-shadow 0.5s var(--ease);
  will-change: transform;
  user-select: none;
  -webkit-user-drag: none;
}

/* Natural tilt for polaroid feel */
.photo-card:nth-child(6n+1) { transform: rotate(-2deg); }
.photo-card:nth-child(6n+2) { transform: rotate(1.5deg) translateY(12px); }
.photo-card:nth-child(6n+3) { transform: rotate(-0.8deg) translateY(-8px); }
.photo-card:nth-child(6n+4) { transform: rotate(2.2deg) translateY(10px); }
.photo-card:nth-child(6n+5) { transform: rotate(-1.6deg) translateY(5px); }
.photo-card:nth-child(6n+6) { transform: rotate(1deg) translateY(-6px); }

.photo-card:hover {
  transform: rotate(0deg) translateY(-20px) scale(1.04) !important;
  box-shadow:
    0 32px 72px rgba(0,0,0,0.65),
    0 0 0 2px rgba(255,213,79,0.28),
    0 0 60px rgba(244,114,182,0.12);
  z-index: 10;
  cursor: pointer;
}

/* Dark vignette at the bottom */
.photo-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 38%, rgba(7,3,26,0.78) 100%);
  z-index: 1;
  transition: opacity 0.3s;
}
.photo-card:hover::after { opacity: 0.55; }

/* Placeholder gradient */
.card-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.42);
}
.card-ph-icon { font-size: 54px; }

/* Actual image */
.card-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease);
}
.photo-card:hover .card-img { transform: scale(1.07); }

/* Shine overlay on hover */
.card-shine {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(255,255,255,0.13) 0%, transparent 55%);
  opacity: 0;
  transition: opacity 0.3s;
}
.photo-card:hover .card-shine { opacity: 1; }

/* Photo number */
.card-label {
  position: absolute;
  bottom: 14px;
  left: 16px;
  z-index: 3;
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.5);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.3s, transform 0.3s;
}
.photo-card:hover .card-label { opacity: 1; transform: translateY(0); }

/* Sparkle hint */
.card-open-hint {
  position: absolute;
  bottom: 14px;
  right: 14px;
  z-index: 3;
  font-size: 22px;
  opacity: 0;
  transform: scale(0.6);
  transition: opacity 0.3s, transform 0.4s var(--spring);
}
.photo-card:hover .card-open-hint { opacity: 1; transform: scale(1); }

/* ================================================================
   SECTION FADE
   ================================================================ */
.section-fade {
  position: relative;
  z-index: 3;
  height: 100px;
  background: linear-gradient(to bottom, transparent, var(--c-bg));
  margin-top: -100px;
  pointer-events: none;
}

/* ================================================================
   MODAL
   ================================================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(7,3,26,0);
  backdrop-filter: blur(0px);
  pointer-events: none;
  transition:
    background       0.45s var(--ease),
    backdrop-filter  0.45s var(--ease);
}
.modal.is-open {
  background: rgba(7,3,26,0.88);
  backdrop-filter: blur(18px) saturate(1.4);
  pointer-events: all;
}

/* Modal inner layout */
.modal-inner {
  display: flex;
  gap: 52px;
  align-items: center;
  max-width: 880px;
  width: 100%;
  opacity: 0;
  transform: translateY(28px) scale(0.94);
  transition:
    opacity   0.42s var(--ease) 0.06s,
    transform 0.52s var(--spring) 0.06s;
}
.modal.is-open .modal-inner {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Close button */
.modal-close-btn {
  position: absolute;
  top: 24px;
  right: 28px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.04);
  color: rgba(255,255,255,0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: rotate(-45deg) scale(0.75);
  transition:
    opacity    0.3s var(--ease) 0.22s,
    transform  0.4s var(--spring) 0.22s,
    background 0.2s,
    border-color 0.2s,
    color 0.2s;
}
.modal.is-open .modal-close-btn {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}
.modal-close-btn:hover {
  background: rgba(244,114,182,0.15);
  border-color: var(--c-pink);
  color: var(--c-pink);
  transform: rotate(90deg) scale(1.06) !important;
}

/* ── Photo column ── */
.modal-photo-col { flex-shrink: 0; }

.modal-frame {
  position: relative;
  width: 300px;
  height: 400px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow:
    0 28px 68px rgba(0,0,0,0.75),
    0 0 0 1px rgba(255,213,79,0.18),
    0 0 90px rgba(244,114,182,0.1);
}
.modal-photo-ph {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 80px;
  background: var(--c-surface);
}
.modal-photo-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ── Message column ── */
.modal-msg-col { flex: 1; min-width: 0; }

.msg-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-gold);
  background: rgba(255,213,79,0.08);
  border: 1px solid rgba(255,213,79,0.25);
  padding: 5px 14px;
  border-radius: 30px;
  margin-bottom: 20px;
}

.msg-counter {
  font-family: 'Pacifico', cursive;
  display: flex;
  align-items: baseline;
  gap: 5px;
  margin-bottom: 24px;
}
.msg-num   { font-size: 46px; color: var(--c-pink); line-height: 1; }
.msg-sep   { font-size: 22px; color: var(--c-muted); opacity: 0.4; }
.msg-total { font-size: 22px; color: var(--c-muted); }

.msg-body {
  min-height: 130px;
  line-height: 1.7;
}
.msg-text {
  font-size: clamp(16px, 2vw, 22px);
  font-weight: 600;
  color: var(--c-white);
  display: inline;
}
.msg-cursor {
  display: inline-block;
  color: var(--c-pink);
  font-size: 26px;
  font-weight: 300;
  vertical-align: middle;
  margin-left: 1px;
  animation: cursorBlink 1s step-end infinite;
}
@keyframes cursorBlink {
  0%,100% { opacity: 1; }
  50%     { opacity: 0; }
}

.msg-hearts {
  margin-top: 36px;
  font-size: 24px;
  animation: heartPulse 2s ease-in-out infinite;
}
@keyframes heartPulse {
  0%,100% { transform: scale(1); }
  50%     { transform: scale(1.1); }
}

/* ── Modal nav ── */
.modal-nav {
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 10px;
  opacity: 0;
  transition: opacity 0.3s var(--ease) 0.25s;
}
.modal.is-open .modal-nav { opacity: 1; }

.modal-nav-btn {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1.5px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.04);
  color: rgba(255,255,255,0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.25s, border-color 0.25s, color 0.25s, transform 0.25s var(--spring);
}
.modal-nav-btn:hover {
  background: rgba(255,213,79,0.12);
  border-color: var(--c-gold);
  color: var(--c-gold);
  transform: scale(1.12);
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 700px) {
  .site-header { padding: 14px 20px; }

  .hero-happy { font-size: clamp(56px, 18vw, 80px); }
  .hero-bday  { font-size: clamp(62px, 20vw, 94px); }
  .hero-desc  { font-size: 15px; }

  :root { --card-w: 230px; --card-h: 310px; }
  .gallery-track { padding: 30px 40px; }

  .modal { padding: 16px; align-items: flex-start; padding-top: 70px; }
  .modal-inner {
    flex-direction: column;
    gap: 24px;
    overflow-y: auto;
    max-height: calc(100dvh - 90px);
    width: 100%;
  }
  .modal-frame { width: 260px; height: 340px; }

  .modal-nav {
    right: 16px;
    bottom: 20px;
    top: auto;
    transform: none;
    flex-direction: row;
  }
}