/* =========================================================
   Wedding Invitation — 김민준 ♡ 박서연 (2026.10.17)
   Concept: 조용히 피어나는 가을의 약속
   Palette: Sage × Dusty Rose duotone with warm ivory base
   ========================================================= */

:root {
  /* === Color Palette (concept-sheet) === */
  --color-primary:   #C9A2A2;   /* dusty rose */
  --color-secondary: #A8B59C;   /* soft sage */
  --color-accent:    #8B5A5A;   /* deep rosewood */
  --color-bg:        #FBF7F3;   /* warm ivory */
  --color-surface:   #F2EAE2;   /* light cream */
  --color-text:      #3A2E2A;   /* warm charcoal */
  --color-muted:     #8E7D75;   /* warm taupe */

  /* === Typography === */
  --font-ko-serif:   "Nanum Myeongjo", "Noto Serif KR", serif;
  --font-ko-sans:    "Pretendard", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-en-serif:   "Cormorant Garamond", "Times New Roman", serif;
  --font-script:     "Allura", cursive;

  /* === Layout === */
  --max-w: 480px;
  --gap-section: 96px;
  --gap-block: 28px;
  --side-pad: 28px;

  /* === Motion tokens (motion-spec §5) === */
  --ease-emphasized: cubic-bezier(0.2, 0, 0, 1);
  --ease-standard:   cubic-bezier(0.4, 0, 0.2, 1);
  --ease-decelerate: cubic-bezier(0, 0, 0.2, 1);
  --ease-accelerate: cubic-bezier(0.4, 0, 1, 1);
  --ease-out-cubic:  cubic-bezier(0.33, 1, 0.68, 1);

  --dur-fast:  0.15s;
  --dur-base:  0.3s;
  --dur-mid:   0.6s;
  --dur-slow:  0.9s;
  --dur-xslow: 1.4s;

  --dur-bg-mesh:   60s;
  --dur-bg-petal:  18s;
  --dur-pulse:     1.6s;
  --dur-eq-bar:    0.4s;
  --dur-ken-burns: 18s;

  --stagger-base:  0.1s;
  --stagger-large: 0.15s;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

html, body {
  background: var(--color-secondary);
  background:
    linear-gradient(135deg, #E2D4C5 0%, #D6C4B5 50%, #C8B7A8 100%);
  color: var(--color-text);
  font-family: var(--font-ko-serif);
  font-size: 16px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100%;
}

body { position: relative; min-height: 100vh; overflow-x: hidden; }

img { max-width: 100%; display: block; }

button {
  font-family: inherit;
  cursor: pointer;
  background: none;
  border: 0;
  color: inherit;
}

a { color: var(--color-accent); text-decoration: none; }

/* === Background mesh (motion §1-B) === */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 50% at 20% 30%, rgba(201, 162, 162, 0.22), transparent 70%),
    radial-gradient(ellipse 50% 60% at 80% 70%, rgba(168, 181, 156, 0.18), transparent 70%),
    radial-gradient(ellipse 70% 40% at 50% 90%, rgba(139, 90, 90, 0.10), transparent 70%),
    radial-gradient(ellipse 40% 50% at 70% 10%, rgba(201, 162, 162, 0.12), transparent 70%);
  background-size: 200% 200%;
  animation: meshDrift var(--dur-bg-mesh) ease-in-out infinite alternate;
  will-change: background-position;
}
@keyframes meshDrift {
  0%   { background-position: 0% 0%, 100% 100%, 50% 100%, 100% 0%; }
  50%  { background-position: 30% 20%, 70% 80%, 60% 70%, 80% 20%; }
  100% { background-position: 60% 40%, 40% 60%, 80% 50%, 60% 40%; }
}

/* Petals canvas */
.bg-petals {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

/* Static petals fallback (reduced-motion only) */
.bg-petals-static { display: none; }
.static-petal {
  position: fixed;
  width: 56px;
  height: 56px;
  pointer-events: none;
  z-index: 1;
}
.sp-1 { top: 8%;    left: 6%; }
.sp-2 { top: 12%;   right: 8%; }
.sp-3 { bottom: 18%; left: 10%; }
.sp-4 { bottom: 22%; right: 12%; }

/* === Card container === */
.card {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
  background: var(--color-bg);
  min-height: 100vh;
  box-shadow: 0 0 60px rgba(58, 46, 42, 0.08);
  overflow: hidden;
}

/* === Section base === */
.section {
  position: relative;
  padding: var(--gap-section) var(--side-pad);
  text-align: center;
  contain: layout style;
}

.section-eyebrow {
  font-family: var(--font-en-serif);
  font-size: 12px;
  letter-spacing: 0.4em;
  color: var(--color-muted);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-ko-serif);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.06em;
  color: var(--color-text);
  margin-bottom: 32px;
}

.divider {
  display: block;
  width: 100%;
  max-width: 280px;
  height: auto;
  margin: 28px auto;
  opacity: 0.85;
  mix-blend-mode: multiply;
}
.divider-narrow { max-width: 180px; opacity: 0.7; }

.script { font-family: var(--font-script); }
.en { font-family: var(--font-en-serif); }
.muted { color: var(--color-muted); font-size: 13px; }

/* === Reveal (motion §2) === */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--dur-slow) var(--ease-standard),
    transform var(--dur-slow) var(--ease-standard);
}
.reveal.is-visible { opacity: 1; transform: none; }

.reveal-line {
  display: block;
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity var(--dur-mid) var(--ease-emphasized),
    transform var(--dur-mid) var(--ease-emphasized);
}
.reveal.is-visible .reveal-line { opacity: 1; transform: none; }
.reveal.is-visible .reveal-line:nth-child(1)  { transition-delay: 0.05s; }
.reveal.is-visible .reveal-line:nth-child(2)  { transition-delay: 0.13s; }
.reveal.is-visible .reveal-line:nth-child(3)  { transition-delay: 0.21s; }
.reveal.is-visible .reveal-line:nth-child(4)  { transition-delay: 0.29s; }
.reveal.is-visible .reveal-line:nth-child(5)  { transition-delay: 0.37s; }
.reveal.is-visible .reveal-line:nth-child(6)  { transition-delay: 0.45s; }
.reveal.is-visible .reveal-line:nth-child(7)  { transition-delay: 0.53s; }
.reveal.is-visible .reveal-line:nth-child(8)  { transition-delay: 0.61s; }

/* ==========================================================
   1. HERO
   ========================================================== */
.hero {
  position: relative;
  padding: 0;
  min-height: 100vh;
  background: var(--color-bg);
  contain: layout style;
}
.hero-frame {
  position: relative;
  width: 100%;
  min-height: 100vh;
  overflow: hidden;
}
.hero-illustration {
  width: 100%;
  height: 100vh;
  object-fit: cover;
  object-position: center top;
  display: block;
  animation: kenBurns var(--dur-ken-burns) ease-in-out infinite alternate;
  will-change: transform;
}
@keyframes kenBurns {
  0%   { transform: scale(1.0) translateY(0); }
  100% { transform: scale(1.04) translateY(-1%); }
}

.hero-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding: 0 var(--side-pad) 22vh;
  text-align: center;
}

.hero-eyebrow {
  font-size: 28px;
  color: var(--color-accent);
  margin-bottom: 6px;
  line-height: 1;
  letter-spacing: 0.02em;
}

.hero-savedate {
  font-size: 11px;
  letter-spacing: 0.45em;
  color: var(--color-muted);
  margin-bottom: 24px;
  line-height: 1.8;
}
.hero-savedate-num {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.35em;
  margin-top: 4px;
  color: var(--color-accent);
}

.hero-names {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-weight: 400;
  margin-bottom: 22px;
}
.hero-name-ko {
  font-family: var(--font-ko-serif);
  font-size: 30px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.18em;
}
.hero-amp {
  font-size: 36px;
  color: var(--color-primary);
  line-height: 1;
  margin: 0;
}

.hero-info {
  font-family: var(--font-ko-sans);
  font-size: 13px;
  color: var(--color-muted);
  letter-spacing: 0.04em;
  line-height: 1.9;
}

/* hero step-in animation */
[data-hero-step] {
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity 800ms var(--ease-decelerate),
    transform 800ms var(--ease-decelerate);
}
.hero.is-loaded [data-hero-step="1"] { opacity: 1; transform: none; transition-delay: 200ms; }
.hero.is-loaded [data-hero-step="2"] { opacity: 1; transform: none; transition-delay: 400ms; }
.hero.is-loaded [data-hero-step="3"] { opacity: 1; transform: none; transition-delay: 900ms; }
.hero.is-loaded [data-hero-step="4"] { opacity: 1; transform: none; transition-delay: 1100ms; }
.hero.is-loaded [data-hero-step="5"] { opacity: 1; transform: none; transition-delay: 1300ms; }
.hero.is-loaded [data-hero-step="6"] { opacity: 1; transform: none; transition-delay: 1700ms; }
.hero.is-loaded [data-hero-step="7"] { opacity: 1; transform: none; transition-delay: 2300ms; }

.hero-illustration {
  opacity: 0;
  filter: blur(6px);
  transform: scale(1.03);
  transition:
    opacity 1200ms var(--ease-decelerate),
    filter 1200ms var(--ease-decelerate),
    transform 1200ms var(--ease-decelerate);
  transition-delay: 400ms;
}
.hero.is-loaded .hero-illustration {
  opacity: 1;
  filter: blur(0);
  transform: scale(1);
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  width: 22px;
  height: 26px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.scroll-indicator span {
  display: block;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--color-muted);
  border-bottom: 1.5px solid var(--color-muted);
  transform: rotate(45deg);
  animation: scrollBounce 1.6s ease-in-out infinite;
}
.scroll-indicator span:nth-child(2) {
  animation-delay: 0.2s;
  opacity: 0.5;
}
@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translate(-2px, -2px); opacity: 0.4; }
  50%      { transform: rotate(45deg) translate(2px, 2px); opacity: 1; }
}

/* ==========================================================
   2. GREETING
   ========================================================== */
.greeting { background: var(--color-bg); }
.greeting-body {
  margin: 24px auto 32px;
  max-width: 320px;
  font-size: 15.5px;
  line-height: 2.0;
  color: var(--color-text);
}
.greeting-body .spacer { height: 12px; line-height: 1; }
.greeting-en {
  font-size: 22px;
  color: var(--color-primary);
  margin-top: 18px;
  letter-spacing: 0.02em;
  font-style: italic;
  font-family: var(--font-en-serif);
}

/* ==========================================================
   3. COUPLE INTRO
   ========================================================== */
.couple { background: var(--color-bg); }
.couple-grid {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  margin-top: 16px;
}
.couple-card {
  width: 100%;
  max-width: 320px;
  padding: 22px 18px;
  background: var(--color-surface);
  border-radius: 12px;
  text-align: center;
  position: relative;
  opacity: 0;
  transform: translateX(-24px);
  transition:
    opacity 700ms var(--ease-decelerate),
    transform 700ms var(--ease-decelerate);
}
.couple-bride {
  transform: translateX(24px);
}
.reveal.is-visible .couple-card { opacity: 1; transform: none; }
.reveal.is-visible .couple-bride { transition-delay: 150ms; }

.couple-card .parents {
  font-family: var(--font-ko-sans);
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}
.couple-card .parents span {
  color: var(--color-text);
  font-weight: 500;
}
.couple-name {
  font-family: var(--font-ko-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.12em;
  margin-bottom: 4px;
}
.couple-name .en {
  display: block;
  font-size: 12px;
  font-weight: 400;
  font-style: italic;
  color: var(--color-muted);
  letter-spacing: 0.18em;
  margin-top: 4px;
}
.couple-bio {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 8px;
  letter-spacing: 0.02em;
}

.couple-amp {
  font-size: 42px;
  color: var(--color-primary);
  line-height: 1;
  margin: 4px 0;
  opacity: 0;
  transition: opacity 600ms var(--ease-decelerate) 350ms;
}
.reveal.is-visible .couple-amp { opacity: 1; }

/* ==========================================================
   4. CALENDAR + D-DAY
   ========================================================== */
.calendar-section {
  background: var(--color-bg);
  position: relative;
}
.corner-deco {
  position: absolute;
  top: 0;
  left: 0;
  width: 110px;
  height: 110px;
  opacity: 0.5;
  pointer-events: none;
  mix-blend-mode: multiply;
}
.corner-deco-flip {
  left: auto;
  right: 0;
  top: 0;
  transform: scaleX(-1);
  width: 110px;
  height: 110px;
}

.date-headline {
  font-family: var(--font-en-serif);
  font-size: 18px;
  color: var(--color-text);
  letter-spacing: 0.06em;
  margin-bottom: 32px;
  line-height: 1.7;
}

.cal {
  width: 100%;
  max-width: 320px;
  margin: 0 auto 36px;
  border-collapse: collapse;
  font-family: var(--font-en-serif);
}
.cal-caption {
  font-size: 14px;
  letter-spacing: 0.4em;
  color: var(--color-muted);
  padding-bottom: 16px;
  caption-side: top;
  text-align: center;
}
.cal th, .cal td {
  padding: 10px 0;
  text-align: center;
  font-size: 13px;
  font-weight: 400;
}
.cal th {
  color: var(--color-muted);
  font-size: 11px;
  letter-spacing: 0.18em;
  border-bottom: 1px solid rgba(168, 181, 156, 0.4);
  padding-bottom: 14px;
}
.cal th.sun { color: var(--color-primary); }
.cal th.sat { color: var(--color-secondary); }
.cal td.sun { color: var(--color-primary); }
.cal td.sat { color: var(--color-secondary); }
.cal td.today {
  position: relative;
  color: var(--color-accent);
  font-weight: 600;
}
.cal td.today::before {
  content: '';
  position: absolute;
  inset: 4px;
  background: var(--color-primary);
  opacity: 0.4;
  border-radius: 50%;
  z-index: 0;
  animation: pulseDay var(--dur-pulse) ease-in-out 3;
}
.cal td.today span {
  position: relative;
  z-index: 1;
}
@keyframes pulseDay {
  0%, 100% { transform: scale(1); opacity: 0.4; }
  50%      { transform: scale(1.15); opacity: 0.7; }
}

.dday-wrap {
  margin-top: 20px;
}
.dday-label {
  font-size: 13px;
  color: var(--color-muted);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}
.dday {
  font-family: var(--font-en-serif);
  font-size: 32px;
  color: var(--color-accent);
  letter-spacing: 0.06em;
  font-weight: 500;
}
.dday-sub {
  font-family: var(--font-ko-sans);
  font-size: 12px;
  color: var(--color-muted);
  margin-top: 12px;
  line-height: 1.7;
}

/* ==========================================================
   5. GALLERY
   ========================================================== */
.gallery-section {
  background: var(--color-bg);
}
.gallery-message {
  font-size: 14.5px;
  color: var(--color-muted);
  margin-bottom: 32px;
}
.gallery-stage {
  position: relative;
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border-radius: 12px;
  background: var(--color-surface);
  contain: paint;
  touch-action: pan-y;
}
.gallery-track {
  position: relative;
  display: flex;
  width: 100%;
  height: 100%;
  list-style: none;
  transform: translateX(0);
  transition: transform 400ms var(--ease-standard);
  will-change: transform;
}
.gallery-slide {
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}
.gallery-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  cursor: zoom-in;
}
.gallery-slide.first-reveal img {
  opacity: 0;
  filter: blur(4px);
  transform: scale(1.03);
  transition:
    opacity 1100ms var(--ease-decelerate),
    filter 1100ms var(--ease-decelerate),
    transform 1100ms var(--ease-decelerate);
}
.reveal.is-visible .gallery-slide.first-reveal img {
  opacity: 1;
  filter: blur(0);
  transform: scale(1);
}

.gallery-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(251, 247, 243, 0.85);
  color: var(--color-accent);
  display: grid;
  place-items: center;
  backdrop-filter: blur(4px);
  transition: transform var(--dur-fast) var(--ease-standard), opacity var(--dur-base) var(--ease-standard);
  z-index: 3;
  opacity: 0.85;
}
.gallery-nav:hover { opacity: 1; }
.gallery-nav:active { transform: translateY(-50%) scale(0.94); }
.gallery-prev { left: 8px; }
.gallery-next { right: 8px; }

.gallery-dots {
  display: flex;
  gap: 6px;
  justify-content: center;
  list-style: none;
  margin-top: 18px;
  opacity: 0;
  transition: opacity 500ms var(--ease-decelerate) 600ms;
}
.reveal.is-visible .gallery-dots { opacity: 1; }
.gallery-dots li {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-muted);
  opacity: 0.4;
  transition: width 300ms var(--ease-standard), opacity 300ms var(--ease-standard), background 300ms;
}
.gallery-dots li.active {
  width: 24px;
  border-radius: 4px;
  opacity: 1;
  background: var(--color-primary);
}

.gallery-hint {
  font-size: 11.5px;
  color: var(--color-muted);
  margin-top: 14px;
  letter-spacing: 0.04em;
}

/* ==========================================================
   6. VENUE
   ========================================================== */
.venue { background: var(--color-bg); }
.venue-name {
  font-family: var(--font-ko-serif);
  font-weight: 700;
  font-size: 18px;
  color: var(--color-text);
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.venue-hall {
  font-size: 14px;
  color: var(--color-accent);
  margin-bottom: 8px;
}
.venue-addr {
  font-family: var(--font-ko-sans);
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 22px;
  letter-spacing: 0.02em;
}

.map-static {
  width: 100%;
  height: 220px;
  border-radius: 12px;
  background:
    linear-gradient(135deg, #E8DDD0 0%, #D4C5B0 100%);
  position: relative;
  margin-bottom: 18px;
  overflow: hidden;
  display: grid;
  place-items: center;
}
.map-static::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(45deg, rgba(255,255,255,0.06) 0 14px, transparent 14px 28px);
  pointer-events: none;
}
.map-pin {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--color-accent);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-align: center;
  background: rgba(251, 247, 243, 0.85);
  padding: 10px 14px;
  border-radius: 999px;
  backdrop-filter: blur(4px);
  position: relative;
  z-index: 1;
}

.venue-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 32px;
}
.venue-actions .btn { flex: 1 1 auto; min-width: 96px; }

.directions {
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 360px;
  margin: 0 auto;
  text-align: left;
}
.directions article {
  background: var(--color-surface);
  border-radius: 12px;
  padding: 18px 20px;
}
.directions h3 {
  font-family: var(--font-ko-serif);
  font-weight: 700;
  font-size: 14px;
  color: var(--color-accent);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}
.directions p {
  font-family: var(--font-ko-sans);
  font-size: 13.5px;
  color: var(--color-text);
  line-height: 1.7;
}
.bus-list {
  list-style: none;
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.bus-list li {
  font-family: var(--font-ko-sans);
  font-size: 12.5px;
  color: var(--color-text);
  display: flex;
  gap: 8px;
  align-items: baseline;
}
.bus-tag {
  font-size: 10.5px;
  padding: 2px 7px;
  border-radius: 999px;
  color: white;
  font-weight: 500;
  letter-spacing: 0.04em;
}
.bus-blue  { background: #3F6BB6; }
.bus-green { background: #5C9F5F; }
.bus-red   { background: #B6463F; }

/* ==========================================================
   7. ACCOUNT
   ========================================================== */
.account { background: var(--color-bg); position: relative; }
.account-message {
  font-size: 14.5px;
  color: var(--color-text);
  margin-bottom: 32px;
  line-height: 2.0;
}

.acc-group {
  width: 100%;
  max-width: 360px;
  margin: 12px auto 0;
  background: var(--color-surface);
  border-radius: 12px;
  overflow: hidden;
  text-align: left;
}
.acc-group + .acc-group { margin-top: 14px; }
.acc-group summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 20px;
  font-family: var(--font-ko-serif);
  font-weight: 700;
  font-size: 14.5px;
  color: var(--color-accent);
  letter-spacing: 0.04em;
  position: relative;
  user-select: none;
  transition: background var(--dur-base) var(--ease-standard);
}
.acc-group summary::-webkit-details-marker { display: none; }
.acc-group summary::after {
  content: '';
  position: absolute;
  right: 24px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--color-accent);
  border-bottom: 1.5px solid var(--color-accent);
  transform: translateY(-70%) rotate(45deg);
  transition: transform var(--dur-base) var(--ease-standard);
}
.acc-group[open] summary::after {
  transform: translateY(-30%) rotate(-135deg);
}
.acc-group[open] summary { background: rgba(201, 162, 162, 0.08); }

.acc-list {
  list-style: none;
  padding: 0 4px 14px;
}
.acc-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-top: 1px solid rgba(142, 125, 117, 0.15);
  flex-wrap: wrap;
}
.acc-list li > .copy-btn { margin-left: auto; }

.acc-name {
  font-family: var(--font-ko-serif);
  font-size: 13.5px;
  color: var(--color-text);
  font-weight: 700;
  flex: 1 0 100%;
}
.acc-num {
  font-family: var(--font-ko-sans);
  font-size: 12.5px;
  color: var(--color-muted);
  letter-spacing: 0.02em;
  flex: 1 1 auto;
}

.copy-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  border: 1px solid var(--color-secondary);
  background: var(--color-bg);
  color: var(--color-accent);
  border-radius: 999px;
  font-size: 12px;
  font-family: var(--font-ko-sans);
  letter-spacing: 0.02em;
  transition:
    transform var(--dur-fast) var(--ease-standard),
    background var(--dur-base) var(--ease-standard),
    color var(--dur-base) var(--ease-standard),
    border-color var(--dur-base) var(--ease-standard);
}
.copy-btn:active { transform: scale(0.96); }
.copy-btn:hover  { background: var(--color-primary); color: var(--color-bg); border-color: var(--color-primary); }

.copy-btn .copy-default,
.copy-btn .copy-done {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: opacity 400ms var(--ease-decelerate), transform 400ms var(--ease-decelerate);
}
.copy-btn .copy-default { opacity: 1; transform: scale(1); }
.copy-btn .copy-done {
  position: absolute;
  inset: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  color: var(--color-secondary);
  background: var(--color-bg);
  border-radius: 999px;
}
.copy-btn.is-copied .copy-default { opacity: 0; transform: scale(0.8); }
.copy-btn.is-copied .copy-done    { opacity: 1; transform: scale(1); color: #5C9F5F; }
.copy-btn.is-copied                { border-color: #5C9F5F; }

/* ==========================================================
   8. RSVP / 9. GUESTBOOK / 10. SHARE
   ========================================================== */
.rsvp, .guestbook, .share { background: var(--color-bg); }

.rsvp-message,
.guestbook-message,
.share-message {
  font-size: 14.5px;
  color: var(--color-text);
  line-height: 2.0;
  margin-bottom: 28px;
}

.share-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  max-width: 320px;
  margin: 0 auto;
}
.share-actions .btn { width: 100%; }

/* ==========================================================
   FOOTER
   ========================================================== */
.card-footer {
  padding: 64px var(--side-pad) 80px;
  text-align: center;
  background: var(--color-surface);
  color: var(--color-muted);
}
.card-footer .script {
  font-size: 38px;
  color: var(--color-primary);
  margin-bottom: 6px;
  line-height: 1;
}
.footer-line {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--color-muted);
  margin-top: 4px;
}
.footer-line.en {
  font-family: var(--font-en-serif);
  font-style: italic;
  font-size: 13px;
  letter-spacing: 0.12em;
  margin-top: 8px;
  color: var(--color-text);
}

/* ==========================================================
   COMMON UI : Buttons / Toast / Lightbox / Music
   ========================================================== */
.btn {
  display: inline-block;
  padding: 12px 22px;
  margin: 4px;
  border: 1px solid var(--color-primary);
  background: transparent;
  color: var(--color-text);
  font-family: var(--font-ko-sans);
  font-size: 13.5px;
  letter-spacing: 0.04em;
  border-radius: 999px;
  text-decoration: none;
  transition:
    transform var(--dur-fast) var(--ease-standard),
    background var(--dur-base) var(--ease-standard),
    color var(--dur-base) var(--ease-standard),
    border-color var(--dur-base) var(--ease-standard);
  cursor: pointer;
  text-align: center;
}
.btn:hover  { background: var(--color-primary); color: var(--color-bg); }
.btn:active { transform: scale(0.96); }
.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}
.btn.primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
}
.btn.primary:hover { background: var(--color-primary); border-color: var(--color-primary); }

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translate(-50%, 20px);
  background: var(--color-surface);
  color: var(--color-text);
  padding: 12px 20px;
  border-radius: 12px;
  font-family: var(--font-ko-sans);
  font-size: 13px;
  letter-spacing: 0.02em;
  box-shadow: 0 6px 24px rgba(58, 46, 42, 0.18);
  z-index: 999;
  opacity: 0;
  transition:
    opacity var(--dur-base) var(--ease-decelerate),
    transform var(--dur-base) var(--ease-decelerate);
  border: 1px solid rgba(168, 181, 156, 0.4);
}
.toast[hidden] { display: none; }
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(58, 46, 42, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  contain: strict;
  opacity: 0;
  transition: opacity 250ms var(--ease-decelerate);
}
.lightbox[hidden] { display: none; }
.lightbox.is-open { opacity: 1; }
.lightbox-img {
  max-width: 92vw;
  max-height: 88vh;
  display: block;
  transform-origin: center center;
  user-select: none;
  -webkit-user-drag: none;
  touch-action: none;
  transition: transform 250ms var(--ease-decelerate);
}
.lightbox.is-zooming .lightbox-img { transition: none; }
.lightbox-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(251, 247, 243, 0.18);
  color: white;
  display: grid;
  place-items: center;
  backdrop-filter: blur(6px);
  transition: transform var(--dur-fast) var(--ease-standard), background var(--dur-base);
}
.lightbox-close:hover { background: rgba(251, 247, 243, 0.3); }
.lightbox-close:active { transform: scale(0.94); }

/* Music toggle */
.music-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 50;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(201, 162, 162, 0.5);
  background: rgba(251, 247, 243, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--color-secondary);
  display: grid;
  place-items: center;
  transition: transform var(--dur-fast) var(--ease-standard);
  overflow: hidden;
}
.music-toggle:active { transform: scale(0.94); }
.music-toggle .ico-note { display: inline-flex; align-items: center; justify-content: center; }
.music-toggle .eq {
  display: none;
  gap: 2px;
  align-items: end;
  height: 14px;
  padding: 0 1px;
}
.music-toggle .eq i {
  display: block;
  width: 2px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 1px;
  animation: eqBounce var(--dur-eq-bar) ease-in-out infinite alternate;
  transform-origin: bottom;
}
.music-toggle .eq i:nth-child(2) { animation-delay: 0.10s; }
.music-toggle .eq i:nth-child(3) { animation-delay: 0.20s; }
@keyframes eqBounce {
  0%   { height: 3px; }
  100% { height: 14px; }
}
.music-toggle[aria-pressed="true"] .ico-note { display: none; }
.music-toggle[aria-pressed="true"] .eq       { display: inline-flex; }
.music-toggle[aria-pressed="true"]            { color: var(--color-accent); border-color: var(--color-accent); }

/* music ripple */
.music-toggle::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: rgba(139, 90, 90, 0.4);
  transform: scale(0);
  opacity: 0;
  pointer-events: none;
}
.music-toggle.is-rippling::after {
  animation: ripple 600ms var(--ease-decelerate);
}
@keyframes ripple {
  0%   { transform: scale(0);   opacity: 0.4; }
  100% { transform: scale(2.5); opacity: 0; }
}

/* ==========================================================
   RESPONSIVE / DESKTOP
   ========================================================== */
@media (min-width: 768px) {
  .card { box-shadow: 0 0 80px rgba(58, 46, 42, 0.18); }
  .hero-name-ko { font-size: 32px; }
}

/* ==========================================================
   PREFERS-REDUCED-MOTION (motion §5 + global)
   ========================================================== */
@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;
  }
  body::before { animation: none !important; }
  .bg-petals { display: none; }
  .bg-petals-static { display: block; }
  .hero-illustration { animation: none !important; transform: none !important; filter: none !important; opacity: 1 !important; }
  .scroll-indicator span { animation: none; }
  .cal td.today::before { animation: none; }
  .music-toggle .eq i { animation: none; height: 8px; }
  [data-hero-step] { opacity: 1 !important; transform: none !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  .reveal .reveal-line { opacity: 1 !important; transform: none !important; }
  .couple-card, .couple-amp { opacity: 1 !important; transform: none !important; }
  .gallery-dots { opacity: 1 !important; }
}