/* ============================================================
   BASE · TYPOGRAPHY · NAV · HERO · COUNTDOWN · STORY
   (phần còn lại của các section nằm ở sections.css)
   ============================================================ */

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-size: var(--text-body);
  line-height: 1.6;
  overflow-x: hidden;
}

img, svg, canvas { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }

::selection { background: var(--accent); color: var(--paper); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

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

.skip-link {
  position: fixed; top: 0; left: 50%; z-index: 200;
  transform: translate(-50%, -120%);
  background: var(--ink); color: var(--paper);
  padding: 0.75rem 1.25rem; font-size: var(--text-label);
  letter-spacing: 0.08em; text-transform: uppercase; text-decoration: none;
  transition: transform var(--dur-fast) var(--ease-out-expo);
}
.skip-link:focus { transform: translate(-50%, 0); }

/* ---- Grain / atmosphere ------------------------------------ */
.grain {
  position: fixed; inset: 0; z-index: 90; pointer-events: none;
  opacity: 0.34; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.42'/%3E%3C/svg%3E");
}

/* ============================================================
   TYPOGRAPHY SYSTEM
   ============================================================ */

.eyebrow {
  font-size: var(--text-label);
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 1.5rem;
}
.eyebrow::before {
  content: ""; display: inline-block;
  width: 2.5rem; height: 1px; margin-right: 0.9rem;
  vertical-align: middle; background: currentColor; opacity: 0.6;
}

.h-display {
  font-family: "Playfair Display", Georgia, serif;
  font-size: var(--text-display);
  font-weight: 400;
  line-height: 0.94;
  letter-spacing: -0.02em;
  margin: 0;
}
.h-display em {
  font-style: italic;
  color: var(--accent);
}

.h-chapter {
  font-family: "Playfair Display", Georgia, serif;
  font-size: var(--text-chapter);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.015em;
  margin: 0;
}
.h-chapter em { font-style: italic; color: var(--accent); }

.h-small {
  font-size: var(--text-label);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--ink-faint);
  margin: 0 0 1.1rem;
}

.hand {
  font-family: Caveat, cursive;
  font-size: 1.45rem;
  line-height: 1.35;
  color: var(--accent);
}

/* ---- Buttons ----------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.7rem;
  padding: 0.95rem 1.7rem;
  border: 1px solid var(--ink); border-radius: 999px;
  background: transparent; color: var(--ink);
  font-size: var(--text-label); letter-spacing: 0.16em;
  text-transform: uppercase; text-decoration: none; cursor: pointer;
  transition: background var(--dur-normal) var(--ease-out-expo),
              color var(--dur-normal) var(--ease-out-expo),
              transform var(--dur-fast) var(--ease-out-expo);
}
.btn:hover { background: var(--ink); color: var(--paper); transform: translateY(-2px); }
.btn__icon { font-size: 0.7em; }

/* ---- Section shell ----------------------------------------- */
.section { padding: var(--space-section) var(--gutter); }
.section--tight { padding-top: clamp(2rem, 1rem + 4vw, 5rem); }

/* ---- Reveal engine ----------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity var(--dur-slow) var(--ease-out-expo),
              transform var(--dur-slow) var(--ease-out-expo);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: transform, opacity;
}
[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
  will-change: auto;
}

/* ============================================================
   NAV
   ============================================================ */

.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 80;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem var(--gutter);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transform: translateY(-100%);
  transition: transform var(--dur-normal) var(--ease-out-expo),
              border-color var(--dur-normal) linear;
}
.site-nav.is-visible { transform: none; border-bottom-color: rgba(36,33,31,0.1); }
/* Cao trào là cao trào — không có thanh nav nào chen vào. */
.site-nav.is-hidden { transform: translateY(-100%); }

.site-nav__logo {
  display: inline-flex; align-items: baseline; gap: 0.35rem;
  border: 0; background: none; cursor: pointer;
  font-family: "Playfair Display", Georgia, serif; font-size: 1.35rem;
  letter-spacing: 0.1em;
}
.site-nav__logo i { color: var(--accent); font-style: normal; font-size: 0.72em; }
.site-nav__logo:active { transform: scale(0.94); }

.site-nav nav { display: flex; align-items: center; gap: clamp(0.9rem, 2vw, 2.2rem); }
.site-nav nav a {
  font-size: var(--text-label); letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--ink-soft); text-decoration: none; position: relative; padding: 0.3rem 0;
}
.site-nav nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 100%;
  background: currentColor; transform: scaleX(0); transform-origin: right;
  transition: transform var(--dur-normal) var(--ease-out-expo);
}
.site-nav nav a:hover::after { transform: scaleX(1); transform-origin: left; }

.site-nav__cta {
  border: 1px solid var(--ink); border-radius: 999px;
  padding: 0.45rem 1.1rem !important; color: var(--ink) !important;
}
.site-nav__cta::after { display: none; }
.site-nav__cta:hover { background: var(--ink); color: var(--paper) !important; }

@media (max-width: 640px) {
  .site-nav nav a:not(.site-nav__cta) { display: none; }
}

/* ============================================================
   HERO
   ============================================================ */

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding: clamp(4.5rem, 8vh, 7rem) var(--gutter) 3rem;
  overflow: hidden;
}

.hero__particles {
  position: absolute; inset: 0; width: 100%; height: 100%;
  pointer-events: none; opacity: 0.75;
}

.hero__tilt {
  position: relative; z-index: 2;
  grid-row: 1 / span 2;
  display: grid; grid-template-rows: auto 1fr auto;
  transform: translate3d(var(--tilt-x, 0px), var(--tilt-y, 0px), 0);
  transition: transform 700ms var(--ease-out-expo);
}

.hero__eyebrow {
  margin: 0; text-align: center;
  font-size: var(--text-label); letter-spacing: 0.4em; text-transform: uppercase;
  color: var(--ink-faint);
  opacity: 0; animation: fadeUp 1.2s var(--ease-out-expo) 0.3s forwards;
}

/* ---- Stage: hai nhân vật -------------------------------------- */
.hero__stage {
  position: relative;
  display: flex; align-items: flex-end; justify-content: center;
  gap: clamp(3rem, 26vw, 22rem);
  padding-block: clamp(1rem, 4vh, 3rem);
}

.hero__char {
  width: clamp(88px, 13vw, 168px);
  opacity: 0;
  animation: fadeUp 1.4s var(--ease-out-expo) 0.7s forwards;
  transform: translate3d(var(--px, 0px), var(--py, 0px), 0);
  transition: transform 900ms var(--ease-out-expo);
}
.hero__char svg { width: 100%; height: auto; }

.hero__heart {
  position: absolute; left: 50%; top: 42%;
  transform: translate(-50%, -50%) scale(0.4);
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  color: var(--accent);
  opacity: 0;
  transition: opacity var(--dur-slow) var(--ease-out-expo),
              transform var(--dur-slow) var(--ease-spring);
}

/* Phase 1+: hai người tiến lại gần nhau */
.hero[data-phase="1"] .hero__stage,
.hero[data-phase="2"] .hero__stage { gap: clamp(1rem, 6vw, 5rem); }
.hero[data-phase="1"] .hero__heart,
.hero[data-phase="2"] .hero__heart {
  opacity: 1; transform: translate(-50%, -50%) scale(1);
}
.hero__stage { transition: gap var(--dur-cinematic) var(--ease-in-out-soft); }

/* Nhìn về phía nhau */
.hero__char--a { --look: 1; }
.hero__char--b { --look: -1; transform: scaleX(-1) translate3d(var(--px, 0px), var(--py, 0px), 0); }

/* ---- Copy: 3 phase chồng lên nhau ----------------------------- */
.hero__copy {
  position: relative;
  min-height: clamp(9rem, 22vh, 15rem);
  display: grid; place-items: center; text-align: center;
}
.hero__line {
  grid-area: 1 / 1;
  opacity: 0; transform: translateY(18px);
  transition: opacity var(--dur-slow) var(--ease-out-expo),
              transform var(--dur-slow) var(--ease-out-expo);
  pointer-events: none;
}
.hero__line.is-on { opacity: 1; transform: none; pointer-events: auto; }

.hero__kicker {
  margin: 0 0 0.9rem;
  font-size: var(--text-label); letter-spacing: 0.36em; text-transform: uppercase;
  color: var(--ink-faint);
}
.hero__date-soft {
  margin: 0;
  font-family: "Playfair Display", Georgia, serif;
  font-size: clamp(2.2rem, 6vw, 4.2rem);
  font-weight: 400; letter-spacing: 0.04em;
}
.hero__whisper {
  margin: 0.1rem 0;
  font-family: "Playfair Display", Georgia, serif;
  font-size: clamp(1.5rem, 4.2vw, 3rem);
  font-weight: 400; font-style: italic; line-height: 1.2;
  color: var(--ink-soft);
}
.hero__whisper--strong { color: var(--ink); font-style: normal; }

.hero__date {
  margin: 0; display: flex; align-items: baseline; justify-content: center;
  gap: clamp(0.5rem, 1.6vw, 1.4rem); flex-wrap: wrap;
  font-family: "Playfair Display", Georgia, serif; font-weight: 400;
}
.hero__date span { font-size: var(--text-display); line-height: 0.86; }
.hero__date em {
  font-style: italic; color: var(--accent);
  font-size: clamp(1.4rem, 3.4vw, 2.6rem); letter-spacing: 0.06em;
}

/* ---- Scroll cue ---------------------------------------------- */
.hero__cue {
  position: relative; z-index: 3;
  justify-self: center;
  display: inline-flex; flex-direction: column; align-items: center; gap: 0.8rem;
  border: 0; background: none; cursor: pointer;
  font-size: var(--text-micro); letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--ink-faint);
  opacity: 0; animation: fadeUp 1s var(--ease-out-expo) 2s forwards;
}
.hero__cue i {
  width: 1px; height: 3rem; background: currentColor;
  transform-origin: top; animation: cueDrop 2.4s var(--ease-in-out-soft) infinite;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: none; }
}
@keyframes cueDrop {
  0%, 100% { transform: scaleY(0.3); opacity: 0.35; }
  50%      { transform: scaleY(1);   opacity: 1; }
}

/* ============================================================
   COUNTDOWN — Wedding ticket
   ============================================================ */

.ticket {
  max-width: 60rem; margin: 0 auto;
  display: grid; grid-template-columns: minmax(0, 0.34fr) minmax(0, 1fr);
  background: var(--paper-deep);
  border: 1px solid rgba(36,33,31,0.12);
  border-radius: 6px;
  box-shadow: var(--shadow-lift);
  overflow: hidden;
  position: relative;
}
/* Đường răng cưa giữa cuống vé và thân vé */
.ticket::before {
  content: ""; position: absolute; top: 0; bottom: 0; left: 34%;
  width: 1px;
  background-image: linear-gradient(to bottom, var(--ink-faint) 55%, transparent 0);
  background-size: 1px 12px; opacity: 0.55;
}

.ticket__stub {
  padding: clamp(1.5rem, 3vw, 2.6rem);
  display: flex; flex-direction: column; justify-content: space-between; gap: 2rem;
  background:
    repeating-linear-gradient(135deg, rgba(139,111,90,0.05) 0 8px, transparent 8px 16px),
    var(--paper);
}
.ticket__brand {
  margin: 0; font-size: var(--text-micro); letter-spacing: 0.24em;
  text-transform: uppercase; color: var(--ink-faint);
}
.ticket__initials {
  margin: 0; font-family: "Playfair Display", Georgia, serif;
  font-size: clamp(1.8rem, 4vw, 2.8rem); letter-spacing: 0.08em;
}
.ticket__initials i { color: var(--accent); font-style: normal; margin: 0 0.4em; font-size: 0.72em; }
.ticket__seat {
  margin: 0; font-size: var(--text-micro); letter-spacing: 0.14em; color: var(--ink-faint);
}

.ticket__body { padding: clamp(1.5rem, 3vw, 2.8rem); }
.ticket__title {
  margin: 0 0 1.8rem;
  font-family: "Playfair Display", Georgia, serif; font-weight: 400;
  font-size: clamp(1.5rem, 3.4vw, 2.4rem);
}
.ticket__title em { font-style: italic; color: var(--accent); }

.ticket__grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  gap: 1.2rem; padding-bottom: 1.6rem;
  border-bottom: var(--hairline);
}
.ticket__label {
  display: block; font-size: var(--text-micro); letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--ink-faint); margin-bottom: 0.35rem;
}
.ticket__value { display: block; font-size: 0.95rem; letter-spacing: 0.08em; font-weight: 500; }

.ticket__count {
  display: flex; align-items: baseline; flex-wrap: wrap;
  gap: clamp(1rem, 4vw, 3rem); padding-top: 1.6rem;
}
.ticket__days {
  margin: 0; display: flex; align-items: baseline; gap: 0.6rem;
  font-family: "Playfair Display", Georgia, serif;
}
.ticket__days span {
  font-size: clamp(3.4rem, 10vw, 6.5rem); line-height: 0.82; font-weight: 400;
  font-variant-numeric: tabular-nums;
}
.ticket__days small {
  font-family: Inter, sans-serif; font-size: var(--text-micro);
  letter-spacing: 0.3em; text-transform: uppercase; color: var(--ink-faint);
}
.ticket__clock {
  margin: 0; font-size: clamp(1.1rem, 2.6vw, 1.6rem);
  letter-spacing: 0.14em; font-variant-numeric: tabular-nums; color: var(--ink-soft);
}
.ticket__clock i { font-style: normal; color: var(--accent); animation: blink 2s steps(1) infinite; }

.ticket__note {
  margin: 1.4rem 0 0; font-family: Caveat, cursive;
  font-size: 1.25rem; color: var(--accent);
}

@keyframes blink { 0%, 60% { opacity: 1; } 61%, 100% { opacity: 0.25; } }

@media (max-width: 720px) {
  .ticket { grid-template-columns: 1fr; }
  .ticket::before {
    left: 0; right: 0; top: auto; bottom: auto; width: auto; height: 1px;
    top: 30%;
    background-image: linear-gradient(to right, var(--ink-faint) 55%, transparent 0);
    background-size: 12px 1px;
  }
  .ticket__stub { flex-direction: row; align-items: center; gap: 1rem; flex-wrap: wrap; }
}

/* ============================================================
   REDUCED MOTION — nội dung vẫn đầy đủ, chỉ bỏ chuyển động
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .hero__eyebrow, .hero__char, .hero__cue { opacity: 1 !important; }
  .hero__line { opacity: 1; transform: none; }
  .hero__copy { display: block; }
  .hero__copy .hero__line { margin-bottom: 1.6rem; }
  .hero__heart { opacity: 1; transform: translate(-50%, -50%); }
}