/* ════════════════════════════════════════════════════════════════════
   spine.css — "Family Walks China" · craft pass v2
   Design language: Chinese ink wash on aged paper.
   Imperial vermillion · Jade · Deep ink · Aged paper · Gold leaf.
   ════════════════════════════════════════════════════════════════════ */

.spine {
  /* ── Imperial palette (warm, layered, NOT default-gray) ─────────── */
  --ink-deep:    #1a1410;         /* deepest sumi ink */
  --ink-mid:     #3a2e25;         /* warm dark for body text */
  --vermillion:  #c8362c;         /* Forbidden City red, the chop ink */
  --vermillion-deep: #9c2820;
  --jade:        #4a7c5e;         /* hand-ground jade */
  --jade-deep:   #2f5a44;
  --gold-leaf:   #b8915a;         /* aged gilt */
  --gold-glow:   #d9b677;
  --paper:       #ede4d0;         /* aged xuan paper */
  --paper-warm:  #e3d5b9;         /* deeper paper for sections */
  --paper-light: #f6f0e0;         /* highlight on paper */
  --mist:        rgba(58, 46, 37, .14);   /* warm shadow */
  --line:        rgba(58, 46, 37, .12);

  /* Family member halos — earthy, not crayon */
  --avatar-mfz:     #4a7c5e;
  --avatar-dina:    #c8362c;
  --avatar-fares:   #b8915a;
  --avatar-youssef: #4a6f8b;
  --avatar-yassin:  #6f5a8a;

  font-family: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  background: var(--paper);
  color: var(--ink-deep);
  display: block;
}

/* Aged paper texture — subtle SVG noise as background, applied universally */
.spine::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: url("data:image/svg+xml;utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.1 0 0 0 0 0.08 0 0 0 0 0.05 0 0 0 0.045 0'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: .55;
  mix-blend-mode: multiply;
}

.spine > * { position: relative; z-index: 1; }

/* ════════════════════════════════════════════════════════════════════
   HERO · the ink-stroke walking path
   ════════════════════════════════════════════════════════════════════ */
.spine-hero {
  padding: 1.75rem 0 1.5rem;
  background: linear-gradient(180deg, var(--paper-warm) 0%, var(--paper) 100%);
  border-bottom: 1px solid var(--line);
  position: relative;
}
/* Subtle vignette to draw eye toward the path */
.spine-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 100%, transparent 30%, rgba(58, 46, 37, .07) 100%);
  pointer-events: none;
}

.spine-hero__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 0 1.5rem 1rem;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.spine-hero__title {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: clamp(1.5rem, 5vw, 2.25rem);
  font-weight: 500;
  margin: 0;
  letter-spacing: -.015em;
  line-height: 1.1;
  color: var(--ink-deep);
}
.spine-hero__title .zh {
  display: block;
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(1rem, 3.5vw, 1.4rem);
  color: var(--vermillion);
  font-weight: 700;
  letter-spacing: .15em;
  margin-bottom: .35rem;
  opacity: .85;
}
.spine-hero__title small {
  display: block;
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-mid);
  font-weight: 600;
  margin-top: .5rem;
  opacity: .7;
}
.spine-hero__count {
  text-align: right;
  font-family: 'Cormorant Garamond', serif;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--vermillion);
}
.spine-hero__count b {
  display: block;
  font-size: 28px;
  font-weight: 600;
  font-family: 'Noto Serif SC', serif;
  color: var(--ink-deep);
  letter-spacing: 0;
}

/* ── Path scroller ───────────────────────────────────────────────── */
.path-scroller {
  position: relative;
  overflow-x: auto;
  overflow-y: visible;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding: 1rem 1.5rem 2.5rem;
  scrollbar-width: thin;
  scrollbar-color: rgba(58, 46, 37, .25) transparent;
}
.path-scroller::-webkit-scrollbar { height: 5px; }
.path-scroller::-webkit-scrollbar-track { background: transparent; }
.path-scroller::-webkit-scrollbar-thumb { background: rgba(58, 46, 37, .2); border-radius: 3px; }

.path-svg {
  display: block;
  height: 240px;
  filter: drop-shadow(0 1px 2px rgba(58, 46, 37, .08));
}

/* ── Ink-brush path ──────────────────────────────────────────────── */
.path-line {
  fill: none;
  stroke: var(--ink-deep);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: .82;
  filter: url(#brushTexture);
}
.path-line.upcoming {
  stroke: var(--ink-mid);
  stroke-width: 1.4;
  stroke-dasharray: 3 9;
  opacity: .5;
  filter: none;
}
.path-line.walked {
  stroke: var(--jade-deep);
  stroke-width: 3;
  opacity: .9;
}

/* ── Stamp stops (red seals) ─────────────────────────────────────── */
.path-stop {
  cursor: pointer;
  scroll-snap-align: center;
}
.path-stop__chop {
  fill: var(--paper-light);
  stroke: var(--ink-deep);
  stroke-width: 1.2;
  transition: stroke 200ms;
}
.path-stop__chop-bg {
  fill: var(--vermillion);
  opacity: 0;
  transition: opacity 200ms;
}
.path-stop:hover .path-stop__chop { stroke: var(--vermillion); }
.path-stop:hover .path-stop__chop-bg { opacity: .12; }

.path-stop[data-city="beijing"]  .path-stop__chop { stroke: var(--jade-deep); }
.path-stop[data-city="xian"]     .path-stop__chop { stroke: var(--gold-leaf); }
.path-stop[data-city="shanghai"] .path-stop__chop { stroke: var(--vermillion); }
.path-stop[data-city="transit"]  .path-stop__chop { stroke: var(--ink-mid); stroke-dasharray: 2 3; }

/* "Today" stop = a real red seal */
.path-stop.today .path-stop__chop {
  fill: var(--vermillion);
  stroke: var(--vermillion-deep);
  stroke-width: 2.5;
  filter: drop-shadow(0 2px 6px rgba(200, 54, 44, .35));
}
.path-stop.today .path-stop__chop-bg { opacity: 0; }
.path-stop.today .path-stop__hanzi { fill: var(--paper-light); font-weight: 700; }

.path-stop__hanzi {
  font-family: 'Noto Serif SC', serif;
  font-size: 16px;
  font-weight: 600;
  fill: var(--ink-deep);
  text-anchor: middle;
  pointer-events: none;
}
.path-stop__day {
  font-family: 'Cormorant Garamond', serif;
  font-size: 9.5px;
  font-weight: 600;
  fill: var(--ink-mid);
  text-anchor: middle;
  letter-spacing: .12em;
  text-transform: uppercase;
  opacity: .6;
}
.path-stop__title {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 600;
  fill: var(--ink-deep);
  text-anchor: middle;
  letter-spacing: .01em;
}

/* City labels rendered between stops */
.path-city-label {
  font-family: 'Cormorant Garamond', serif;
  font-size: 14px;
  font-style: italic;
  fill: var(--vermillion);
  text-anchor: middle;
  font-weight: 500;
  opacity: .7;
}

/* ── Family marker (the walking 5) ───────────────────────────────── */
.family-marker { transition: transform 700ms cubic-bezier(.23,1,.32,1); }
.family-marker__halo {
  fill: var(--vermillion);
  opacity: .12;
  animation: halo 3s ease-in-out infinite;
}
@keyframes halo {
  0%, 100% { transform: scale(1);    opacity: .22; }
  50%      { transform: scale(1.25); opacity: .08; }
}
.family-portrait {
  stroke: var(--paper-light);
  stroke-width: 1.5;
  filter: drop-shadow(0 1px 3px rgba(0,0,0,.25));
}
.family-portrait-letter {
  font-family: 'Cormorant Garamond', serif;
  font-size: 10px;
  font-weight: 600;
  fill: var(--paper-light);
  text-anchor: middle;
  pointer-events: none;
}

/* ════════════════════════════════════════════════════════════════════
   TABS · chapter markers (not browser tabs)
   ════════════════════════════════════════════════════════════════════ */
.spine-tabs {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 0;
  overflow-x: auto;
  padding: .35rem .5rem;
  scrollbar-width: none;
  box-shadow: 0 1px 0 rgba(58, 46, 37, .04);
}
.spine-tabs::-webkit-scrollbar { display: none; }

.spine-tab {
  flex: 0 0 auto;
  background: transparent;
  border: none;
  padding: .85rem 1.2rem .75rem;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-mid);
  cursor: pointer;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .15rem;
  white-space: nowrap;
  transition: color 160ms;
  opacity: .55;
  letter-spacing: .02em;
}
.spine-tab__zh {
  font-family: 'Noto Serif SC', serif;
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: .12em;
  opacity: .8;
}
.spine-tab:hover { color: var(--ink-deep); opacity: .85; }
.spine-tab.active {
  color: var(--vermillion);
  opacity: 1;
}
.spine-tab.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 3px;
  background: var(--vermillion);
  border-radius: 2px;
  /* Slight ink-brush stroke effect */
  filter: blur(.3px);
}

/* ════════════════════════════════════════════════════════════════════
   PANES
   ════════════════════════════════════════════════════════════════════ */
.spine-pane {
  display: none;
  padding: 2rem 1.25rem 4rem;
  max-width: 1100px;
  margin: 0 auto;
}
.spine-pane.active {
  display: block;
  animation: paneIn 320ms cubic-bezier(.23,1,.32,1) both;
}
@keyframes paneIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ════════════════════════════════════════════════════════════════════
   TODAY · the killer pre-trip view
   ════════════════════════════════════════════════════════════════════ */
.today-stack { display: flex; flex-direction: column; gap: 1.25rem; }

.today-hero {
  position: relative;
  background:
    linear-gradient(135deg, rgba(26, 20, 16, .94) 0%, rgba(58, 46, 37, .92) 100%),
    radial-gradient(ellipse at 80% 20%, rgba(200, 54, 44, .35) 0%, transparent 60%);
  background-blend-mode: normal;
  color: var(--paper-light);
  border-radius: 4px;
  padding: 2.75rem 1.75rem 2.25rem;
  text-align: center;
  overflow: hidden;
  border: 1px solid rgba(184, 145, 90, .25);
  box-shadow: 0 8px 32px rgba(26, 20, 16, .15),
              inset 0 1px 0 rgba(217, 182, 119, .12);
}
/* Mountain-silhouette decoration */
.today-hero__scene {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50%;
  pointer-events: none;
  opacity: .22;
}
.today-hero::before {
  content: "印";
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  font-family: 'Noto Serif SC', serif;
  font-size: 36px;
  font-weight: 700;
  color: var(--vermillion);
  background: var(--paper-light);
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transform: rotate(-6deg);
  box-shadow: 0 2px 8px rgba(0,0,0,.3);
  border: 2px solid var(--vermillion);
}

.today-hero__kicker {
  font-family: 'Cormorant Garamond', serif;
  font-size: 12.5px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--gold-glow);
  font-weight: 600;
  margin-bottom: .85rem;
  font-style: italic;
}
.today-hero__phase {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(1.75rem, 6.5vw, 2.75rem);
  font-weight: 500;
  margin: 0;
  letter-spacing: -.015em;
  line-height: 1.1;
  color: var(--paper-light);
}
.today-hero__count {
  margin-top: 1.25rem;
  font-family: 'Cormorant Garamond', serif;
  font-size: 13px;
  color: var(--gold-glow);
  letter-spacing: .04em;
  font-style: italic;
  position: relative;
  z-index: 2;
}
.today-hero__count b {
  font-family: 'Noto Serif SC', serif;
  font-size: 44px;
  font-weight: 700;
  color: var(--paper-light);
  display: inline-block;
  margin-right: .35rem;
  letter-spacing: 0;
}

/* ── Cards (booking / family / wish / visa) ─────────────────────── */
.today-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}
.today-card {
  position: relative;
  background: var(--paper-light);
  border: 1px solid var(--line);
  border-left: 4px solid var(--ink-mid);
  border-radius: 2px;
  padding: 1.4rem 1.5rem 1.25rem;
  display: grid;
  gap: .65rem;
  box-shadow: 0 1px 3px rgba(58, 46, 37, .05),
              0 4px 16px rgba(58, 46, 37, .04);
  transition: transform 160ms cubic-bezier(.23,1,.32,1), box-shadow 160ms;
  overflow: hidden;
}
.today-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 100%;
  background-image: url("data:image/svg+xml;utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='0.9' numOctaves='1'/%3E%3CfeColorMatrix values='0 0 0 0 0.2 0 0 0 0 0.15 0 0 0 0 0.1 0 0 0 0.04 0'/%3E%3C/filter%3E%3Crect width='100' height='100' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity: .5;
  pointer-events: none;
  mix-blend-mode: multiply;
}
.today-card > * { position: relative; z-index: 1; }
.today-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 2px 4px rgba(58, 46, 37, .08),
              0 12px 28px rgba(58, 46, 37, .1);
}
/* Card type accents */
.today-card.is-booking { border-left-color: var(--vermillion); }
.today-card.is-family  { border-left-color: var(--jade); }
.today-card.is-wish    { border-left-color: var(--gold-leaf); }
.today-card.is-visa    { border-left-color: var(--ink-mid); }

.today-card__stamp {
  position: absolute;
  top: 1rem;
  right: 1.1rem;
  font-family: 'Noto Serif SC', serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--vermillion);
  opacity: .14;
  pointer-events: none;
  z-index: 1;
}
.today-card__kicker {
  font-family: 'Inter', sans-serif;
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--vermillion);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: .4rem;
}
.today-card.is-family .today-card__kicker  { color: var(--jade-deep); }
.today-card.is-wish    .today-card__kicker { color: var(--gold-leaf); }
.today-card.is-visa    .today-card__kicker { color: var(--ink-mid); }

.today-card__title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.45rem;
  font-weight: 500;
  margin: 0;
  letter-spacing: -.01em;
  color: var(--ink-deep);
  line-height: 1.2;
}
.today-card__body {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-mid);
}
.today-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1rem;
  font-size: 11.5px;
  color: var(--ink-mid);
  margin-top: .15rem;
  opacity: .8;
  font-family: ui-monospace, "SF Mono", monospace;
}
.today-card__meta b {
  color: var(--vermillion);
  font-weight: 700;
  font-family: 'Inter', sans-serif;
}

.today-card__cta {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  margin-top: .35rem;
  padding: .6rem 1.1rem;
  background: var(--ink-deep);
  color: var(--paper-light);
  border: none;
  border-radius: 2px;
  text-decoration: none;
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  transition: background 160ms;
  cursor: pointer;
  align-self: flex-start;
}
.today-card__cta:hover { background: var(--vermillion); }

/* ════════════════════════════════════════════════════════════════════
   ALL DAYS · accordion of brush-stroke cards
   ════════════════════════════════════════════════════════════════════ */
.days-accordion { display: flex; flex-direction: column; gap: .65rem; }

.day-acc {
  background: var(--paper-light);
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
  transition: border-color 160ms;
}
.day-acc:hover { border-color: rgba(200, 54, 44, .25); }

.day-acc__head {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 1.25rem;
  align-items: center;
  padding: 1.1rem 1.4rem;
  cursor: pointer;
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  font-family: 'Inter', sans-serif;
  transition: background 160ms;
}
.day-acc__head:hover { background: rgba(200, 54, 44, .03); }

.day-acc__num {
  width: 48px;
  height: 48px;
  border-radius: 2px;
  background: var(--paper);
  border: 1.5px solid var(--ink-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Noto Serif SC', serif;
  font-weight: 700;
  font-size: 22px;
  color: var(--ink-deep);
  position: relative;
  transform: rotate(-3deg);
  transition: transform 200ms;
}
.day-acc:hover .day-acc__num { transform: rotate(0); }
.day-acc[data-city="beijing"]  .day-acc__num { border-color: var(--jade-deep);  color: var(--jade-deep); }
.day-acc[data-city="xian"]     .day-acc__num { border-color: var(--gold-leaf);  color: var(--gold-leaf); }
.day-acc[data-city="shanghai"] .day-acc__num { border-color: var(--vermillion); color: var(--vermillion); }
.day-acc[data-city="transit"]  .day-acc__num { border-color: var(--ink-mid);    color: var(--ink-mid); border-style: dashed; }

.day-acc__title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.15rem;
  font-weight: 500;
  margin: 0;
  letter-spacing: -.005em;
  color: var(--ink-deep);
}
.day-acc__sub {
  font-size: 11px;
  color: var(--ink-mid);
  margin-top: .15rem;
  letter-spacing: .04em;
  font-family: 'Inter', sans-serif;
  opacity: .7;
  text-transform: uppercase;
}
.day-acc__chev {
  font-size: 22px;
  color: var(--ink-mid);
  transition: transform 200ms;
  font-family: 'Cormorant Garamond', serif;
  opacity: .55;
}
.day-acc.open .day-acc__chev { transform: rotate(90deg); color: var(--vermillion); opacity: 1; }

.day-acc__body {
  display: none;
  padding: 0 1.4rem 1.4rem;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-mid);
}
.day-acc.open .day-acc__body { display: block; animation: paneIn 240ms ease-out; }

/* ════════════════════════════════════════════════════════════════════
   EMBED PANES (Bookings + Survival)
   ════════════════════════════════════════════════════════════════════ */
.embed-pane {
  text-align: center;
  padding: 3.5rem 1rem;
  background: var(--paper-light);
  border: 1px solid var(--line);
  border-radius: 2px;
  position: relative;
}
.embed-pane::before {
  content: "门";
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  font-family: 'Noto Serif SC', serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--vermillion);
  opacity: .12;
}
.embed-pane__title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.75rem;
  font-weight: 500;
  margin: 0 0 .5rem;
  color: var(--ink-deep);
}
.embed-pane__sub {
  font-size: 13px;
  color: var(--ink-mid);
  margin-bottom: 2rem;
  font-style: italic;
  opacity: .8;
}
.embed-pane__cta {
  display: inline-block;
  padding: 1rem 2rem;
  background: var(--vermillion);
  color: var(--paper-light);
  text-decoration: none;
  border-radius: 2px;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
  transition: transform 160ms, background 160ms, box-shadow 160ms;
  border: 1px solid var(--vermillion-deep);
  box-shadow: 0 2px 6px rgba(200, 54, 44, .25);
}
.embed-pane__cta:hover {
  background: var(--vermillion-deep);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(200, 54, 44, .35);
}

/* ════════════════════════════════════════════════════════════════════
   FOOTER
   ════════════════════════════════════════════════════════════════════ */
.spine-footer {
  padding: 2.5rem 1rem 4rem;
  text-align: center;
  font-size: 11px;
  color: var(--ink-mid);
  letter-spacing: .12em;
  text-transform: uppercase;
  font-family: 'Inter', sans-serif;
  opacity: .6;
}
.spine-footer a { color: var(--vermillion); text-decoration: none; }
.spine-footer a:hover { text-decoration: underline; }

/* ════════════════════════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .family-marker__halo { animation: none; }
}
@media (max-width: 600px) {
  .spine-hero { padding: 1.25rem 0 1rem; }
  .spine-hero__top { padding: 0 1.1rem 1rem; gap: 1rem; }
  .spine-hero__count { text-align: left; }
  .spine-hero__count b { font-size: 22px; }
  .today-hero { padding: 2rem 1.25rem 1.5rem; border-radius: 2px; }
  .today-hero__count b { font-size: 36px; }
  .today-card { padding: 1.2rem 1.3rem 1.1rem; }
}