/* =============================================================
   Đi Đâu Trời — style.css
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.65;
  color: var(--ink);
  background-color: var(--paper);
  /* giấy có hạt nhẹ — thuần CSS, không cần ảnh */
  background-image:
    radial-gradient(circle at 18% 12%, rgba(223,107,59,.05), transparent 42%),
    radial-gradient(circle at 82% 78%, rgba(94,124,76,.06), transparent 46%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 0.21 0 0 0 0 0.18 0 0 0 0 0.13 0 0 0 .035 0'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)'/%3E%3C/svg%3E");
  background-attachment: fixed;
  overflow-x: hidden;
}

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

.skip {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--ink); color: var(--paper); padding: .6rem 1rem; border-radius: 0 0 8px 0;
}
.skip:focus { left: 0; }

:where(a, button, [tabindex]):focus-visible {
  outline: 3px solid var(--clay);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- Tán lá động (foliage) ----------------------------- */
/* Mỗi cụm lá là 1 SVG; cả cây + bóng nằm trong CÙNG khung transform
   → bóng luôn chiếu khớp với chuyển động của lá. */
.foliage {
  position: fixed;
  z-index: 0;
  pointer-events: none;
  width: clamp(220px, 30vw, 460px);
  opacity: .5;
  will-change: transform;
}
.foliage[data-foliage="tl"] { top: -6vh; left: -7vw; transform-origin: 12% 8%; }
.foliage[data-foliage="tr"] { top: -8vh; right: -9vw; transform-origin: 88% 10%; width: clamp(200px,26vw,400px); }
.foliage[data-foliage="bl"] { bottom: -10vh; left: -8vw; transform-origin: 10% 92%; width: clamp(180px,24vw,360px); }

.foliage svg { width: 100%; height: auto; }

/* Lá đung đưa — lệch pha nhẹ giữa các cụm cho tự nhiên */
@keyframes sway {
  0%, 100% { transform: rotate(-1.6deg) translateY(0); }
  50%      { transform: rotate(1.9deg) translateY(-6px); }
}
@keyframes swaySoft {
  0%, 100% { transform: rotate(1.2deg); }
  50%      { transform: rotate(-1.4deg); }
}
.foliage[data-foliage="tl"] { animation: sway 9s var(--ease-out) infinite; }
.foliage[data-foliage="tr"] { animation: swaySoft 11s var(--ease-out) infinite; }
.foliage[data-foliage="bl"] { animation: sway 13s var(--ease-out) infinite; }

/* Lá chi tiết (từng phiến) đung đưa chậm hơn, lệch pha */
.leaflet {
  transform-box: fill-box;
  transform-origin: var(--leaf-origin, 50% 0%);
  animation: leafSway var(--leaf-dur, 6s) ease-in-out infinite;
  animation-delay: var(--leaf-delay, 0s);
}
@keyframes leafSway {
  0%, 100% { transform: rotate(var(--leaf-a, -4deg)); }
  50%      { transform: rotate(var(--leaf-b, 5deg)); }
}

/* ---------- Masthead ------------------------------------------ */
.masthead {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 1rem;
  padding: .7rem var(--gutter);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(1.2) blur(10px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}
.brand { display: inline-flex; align-items: center; gap: .55rem; text-decoration: none; margin-right: auto; }
.brand__name { font-family: var(--font-display); font-weight: 700; font-size: var(--step-1); letter-spacing: -.01em; }
.masthead__nav { display: flex; gap: 1.35rem; }
.masthead__nav a {
  text-decoration: none; font-weight: 500; color: var(--ink-soft);
  padding: .3rem 0; border-bottom: 2px solid transparent; transition: color .2s, border-color .2s;
}
.masthead__nav a:hover { color: var(--ink); border-color: var(--clay); }
.masthead__actions { display: flex; align-items: center; gap: .6rem; }

.iconbtn {
  display: grid; place-items: center;
  width: 40px; height: 40px; border-radius: var(--radius-pill);
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  cursor: pointer; transition: transform .18s var(--ease-out), border-color .18s;
}
.iconbtn:hover { transform: translateY(-1px); border-color: var(--clay); }

/* ---------- Nút ----------------------------------------------- */
.btn {
  --bg: var(--card); --fg: var(--ink); --bd: var(--line);
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .72rem 1.35rem; border-radius: var(--radius-pill);
  font-family: inherit; font-size: var(--step-0); font-weight: 600;
  text-decoration: none; cursor: pointer;
  background: var(--bg); color: var(--fg); border: 1px solid var(--bd);
  transition: transform .18s var(--ease-out), box-shadow .18s, background .18s, color .18s;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-card); }
.btn--primary { --bg: var(--clay); --fg: #fff; --bd: var(--clay); }
.btn--primary:hover { --bg: var(--clay-deep); --bd: var(--clay-deep); }
.btn--soft { --bg: var(--paper-2); --fg: var(--ink); --bd: var(--line); }
.btn--ghost { --bg: transparent; --bd: var(--line); }

/* ---------- Chữ viết tay -------------------------------------- */
.hand { font-family: var(--font-hand); font-weight: 600; color: var(--clay-deep); }
.hand--s { font-size: var(--step-1); }

/* ---------- Hero ---------------------------------------------- */
.hero {
  position: relative; z-index: 1;
  max-width: var(--page-max); margin: 0 auto;
  padding: clamp(2.4rem, 6vw, 4.6rem) var(--gutter) clamp(1.6rem, 4vw, 3rem);
  display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(1.4rem, 4vw, 3rem);
  align-items: center;
}
.kicker {
  margin: 0 0 .9rem; font-size: var(--step--1); font-weight: 600;
  color: var(--leaf); letter-spacing: .02em;
}
.hero__title {
  font-family: var(--font-display); font-weight: 700;
  font-size: var(--step-4); line-height: .98; letter-spacing: -.02em;
  margin: 0 0 1rem;
}
.hero__title em { font-style: italic; color: var(--clay); }
.hero__lead { max-width: 46ch; color: var(--ink-soft); margin: 0 0 1.6rem; }
.hero__cta { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }

.hero__stack { position: relative; min-height: clamp(280px, 38vw, 440px); }
.polaroid {
  position: absolute; margin: 0; padding: .7rem .7rem 2.4rem;
  background: #fff; border-radius: 6px;
  box-shadow: var(--shadow-pop);
  transition: transform .35s var(--ease-out);
}
.polaroid img { width: 100%; border-radius: 3px; aspect-ratio: 4/3; object-fit: cover; }
.polaroid--a { width: 62%; top: 2%; left: 2%; transform: rotate(-6deg); }
.polaroid--b { width: 54%; bottom: 0; right: 0; transform: rotate(4deg); }
.polaroid:hover { transform: rotate(0) translateY(-6px); z-index: 2; }

.moods {
  grid-column: 1 / -1;
  display: flex; align-items: center; gap: .7rem; flex-wrap: wrap;
  margin-top: 1.2rem; padding-top: 1.2rem;
  border-top: 1px dashed var(--line);
}
.moods__label { margin-right: .3rem; }
.chip {
  font-family: inherit; font-size: var(--step--1); font-weight: 600;
  padding: .5rem 1rem; border-radius: var(--radius-pill);
  border: 1px solid var(--line); background: var(--card); color: var(--ink-soft);
  cursor: pointer; transition: all .18s var(--ease-out);
}
.chip:hover { border-color: var(--clay); color: var(--ink); }
.chip.is-active { background: var(--leaf); border-color: var(--leaf); color: #fff; }

/* ---------- Lưới khám phá ------------------------------------- */
.explore { position: relative; z-index: 1; max-width: var(--page-max); margin: 0 auto; padding: clamp(2rem,5vw,3.4rem) var(--gutter) clamp(3rem,7vw,5rem); }
.explore__head { display: flex; align-items: baseline; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.6rem; }
.explore__title { font-family: var(--font-display); font-weight: 600; font-size: var(--step-3); letter-spacing: -.015em; margin: 0; }
.explore__sub { margin: 0; }

.grid {
  display: grid; gap: clamp(1rem, 2.4vw, 1.6rem);
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 268px), 1fr));
}

/* ---------- Card ---------------------------------------------- */
.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform .22s var(--ease-out), box-shadow .22s;
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-pop); }

.card__media { position: relative; aspect-ratio: 4/3; overflow: hidden; background: var(--paper-2); }
.card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease-out); }
.card:hover .card__media img { transform: scale(1.05); }

.card__tag {
  position: absolute; top: .7rem; left: .7rem;
  font-size: var(--step--1); font-weight: 600;
  padding: .28rem .7rem; border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  color: var(--ink); backdrop-filter: blur(4px);
}
.card__save {
  position: absolute; top: .55rem; right: .55rem;
  display: grid; place-items: center; width: 36px; height: 36px;
  border-radius: var(--radius-pill); border: none; cursor: pointer;
  background: color-mix(in srgb, var(--paper) 92%, transparent); color: var(--ink);
  transition: transform .18s var(--ease-out), color .18s;
}
.card__save:hover { transform: scale(1.08); color: var(--clay); }
.card__save[aria-pressed="true"] { color: var(--clay); }

.card__body { padding: .95rem 1.05rem 1.15rem; display: flex; flex-direction: column; gap: .5rem; flex: 1; }
.card__title { font-family: var(--font-display); font-weight: 600; font-size: var(--step-1); line-height: 1.15; margin: 0; }
.card__desc { color: var(--ink-soft); font-size: var(--step--1); margin: 0; }
.card__meta { display: flex; align-items: center; gap: .6rem; margin-top: auto; padding-top: .5rem; font-size: var(--step--1); }
.rating { display: inline-flex; align-items: center; gap: .28rem; font-weight: 600; color: var(--ink); }
.rating svg { color: var(--sun); }
.card__loc { color: var(--ink-soft); }
.card__price { margin-left: auto; font-weight: 600; color: var(--leaf); }

.explore__more { text-align: center; margin-top: 2.2rem; }

/* ---------- Footer -------------------------------------------- */
.site-footer {
  position: relative; z-index: 1;
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  padding: clamp(2rem,5vw,3rem) var(--gutter) 2.4rem;
  text-align: center;
}
.site-footer__brand { font-family: var(--font-display); font-weight: 700; font-size: var(--step-2); margin: 0 0 .4rem; }
.site-footer__note { color: var(--ink-soft); font-size: var(--step--1); margin: 0 auto 1rem; max-width: 52ch; }

/* ---------- Responsive ---------------------------------------- */
@media (max-width: 880px) {
  .masthead__nav { display: none; }
  .hero { grid-template-columns: 1fr; }
  .hero__stack { min-height: 300px; order: -1; }
}
@media (max-width: 560px) {
  .brand__name { font-size: var(--step-0); }
  .moods__label { width: 100%; }
}

/* ---------- Tôn trọng giảm chuyển động ------------------------ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .foliage { animation: none !important; }
  .leaflet { animation: none !important; }
}