:root {
  --ink: #1d1b19;
  --muted: #6b655e;
  --line: #e4ded6;
  --paper: #fbf9f6;
  --card: #ffffff;
  --accent: #9a6b2f;
  --accent-soft: #f4ece1;
  --accent-2: #b3261e;
  --serif: "Noto Serif TC", "Songti TC", serif;
  --sans: "Noto Sans TC", system-ui, -apple-system, "PingFang TC", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, monospace;
  --wrap: 1080px;
}
.theme-ca { --accent: #1f6f5c; --accent-soft: #e5f1ec; --accent-2: #c0573a; }
.theme-kh { --accent: #a3245a; --accent-soft: #f7e6ee; --accent-2: #a3245a; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--sans); font-size: 16px; line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--serif); font-weight: 700; line-height: 1.35; margin: 0; text-wrap: balance; }
p { margin: 0; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

/* header */
.site-head {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line);
}
.site-head .wrap { display: flex; align-items: center; gap: 16px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; min-width: 0; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 50%; flex: none;
  border: 1.5px solid var(--accent); color: var(--accent);
  display: grid; place-items: center; font-family: var(--serif); font-size: 13px;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.brand-text b { font-family: var(--serif); font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.brand-text small { font-size: 10px; letter-spacing: .12em; color: var(--muted); text-transform: uppercase; white-space: nowrap; }
.nav { margin-left: auto; display: flex; gap: 22px; font-size: 14px; }
.nav a { text-decoration: none; color: var(--muted); }
.nav a:hover { color: var(--accent); }
.nav .cta { color: #fff; background: var(--accent); padding: 6px 14px; border-radius: 999px; }
.nav .cta:hover { color: #fff; opacity: .9; }
.nav-toggle { display: none; margin-left: auto; background: none; border: 0; font-size: 22px; color: var(--ink); cursor: pointer; }
@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .nav {
    display: none; position: absolute; top: 60px; left: 0; right: 0;
    flex-direction: column; gap: 0; background: var(--paper); border-bottom: 1px solid var(--line);
  }
  .nav.open { display: flex; }
  .nav a { padding: 14px 20px; border-top: 1px solid var(--line); }
  .nav .cta { border-radius: 0; }
}

/* hero */
.hero { padding: 56px 0 40px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.eyebrow { font-size: 13px; letter-spacing: .08em; color: var(--accent); margin-bottom: 14px; }
.hero h1 { font-size: clamp(28px, 4.2vw, 44px); margin-bottom: 16px; }
.hero .quote { font-family: var(--serif); font-style: italic; color: var(--accent); margin-bottom: 12px; }
.hero .lead { color: var(--muted); font-size: 16.5px; }
.btns { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn {
  display: inline-block; padding: 12px 22px; border-radius: 999px; font-size: 15px;
  text-decoration: none; border: 1.5px solid var(--accent); color: var(--accent); background: transparent;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn:hover { opacity: .88; }
.photo { position: relative; border-radius: 10px; overflow: hidden; background: var(--line); }
.photo img { width: 100%; height: 100%; object-fit: cover; }
.photo .credit {
  position: absolute; right: 8px; bottom: 8px; font-size: 11px; color: #fff;
  background: rgba(0,0,0,.45); padding: 2px 8px; border-radius: 999px;
}
.hero .photo { aspect-ratio: 4 / 3; }
@media (max-width: 820px) {
  .hero { padding: 32px 0 24px; }
  .hero-grid { grid-template-columns: 1fr; gap: 28px; }
}

/* facts */
.facts {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin: 16px 0 8px;
}
.fact { padding: 18px 16px 18px 0; }
.fact dt { font-size: 12.5px; color: var(--muted); }
.fact dd { margin: 4px 0 0; font-family: var(--serif); font-weight: 700; font-size: 17px; }

/* sections */
section.block { padding: 64px 0; }
section.block + section.block { border-top: 1px solid var(--line); }
.sec-head { max-width: 720px; margin-bottom: 32px; }
.sec-head .eyebrow { margin-bottom: 8px; }
.sec-head h2 { font-size: clamp(24px, 3vw, 32px); margin-bottom: 10px; }
.sec-head p { color: var(--muted); }
@media (max-width: 820px) { section.block { padding: 44px 0; } }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  overflow: hidden; display: flex; flex-direction: column;
}
.card.topline { border-top: 3px solid var(--accent); }
.card .photo { border-radius: 0; aspect-ratio: 16 / 9; }
.card-body { padding: 20px 22px 22px; }
.card .num { font-family: var(--mono); font-size: 13px; color: var(--accent); margin-bottom: 6px; }
.card h3 { font-size: 18.5px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 15px; }

/* pricing */
.price-card .label { font-size: 13px; color: var(--muted); }
.price { font-family: var(--serif); font-size: 30px; font-weight: 700; margin: 6px 0 12px; }
.price small { font-size: 14px; font-weight: 400; color: var(--muted); }
.price s { font-size: 16px; color: var(--muted); font-weight: 400; margin-right: 8px; }
.checks { list-style: none; padding: 0; margin: 0; font-size: 14.5px; color: var(--muted); }
.checks li { padding-left: 22px; position: relative; margin-top: 4px; }
.checks li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); }
.price-card.featured { border: 2px solid var(--accent); }

.note {
  margin-top: 20px; padding: 14px 18px; border-radius: 8px; font-size: 14px;
  background: var(--accent-soft); color: var(--ink); border-left: 3px solid var(--accent);
}
.todo { color: var(--accent-2); font-weight: 600; }

/* itinerary */
.days { display: grid; gap: 14px; }
.day {
  display: grid; grid-template-columns: 120px 1fr; gap: 20px;
  background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 20px 22px;
}
.day-no { font-family: var(--mono); font-weight: 700; font-size: 18px; line-height: 1.3; }
.day-no small { display: block; font-weight: 400; font-size: 13px; color: var(--muted); }
.tag {
  display: inline-block; font-size: 12px; padding: 1px 10px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); margin-bottom: 6px;
}
.day h3 { font-size: 17.5px; margin-bottom: 4px; }
.day p { color: var(--muted); font-size: 15px; }
.missions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.mission {
  font-size: 13px; color: var(--accent-2); border: 1px solid currentColor;
  border-radius: 999px; padding: 1px 10px;
}
.pillar-divider {
  display: flex; align-items: center; gap: 12px; font-size: 12.5px; color: var(--accent);
  margin: 10px 0 0;
}
.pillar-divider::before, .pillar-divider::after { content: ""; flex: 1; height: 1px; background: var(--line); }
@media (max-width: 640px) {
  .day { grid-template-columns: 1fr; gap: 6px; }
  .day-no { display: flex; gap: 10px; align-items: baseline; }
  .day-no small { display: inline; }
}

/* responsibility meter (Cambodia) */
.meter { display: inline-flex; gap: 3px; vertical-align: middle; margin-left: 8px; }
.meter i { width: 14px; height: 6px; border-radius: 2px; background: var(--line); }
.meter i.on { background: var(--accent); }
.meter-label { font-size: 12px; color: var(--muted); }

/* accordion */
.acc { display: grid; gap: 10px; }
.acc details { background: var(--card); border: 1px solid var(--line); border-radius: 8px; }
.acc summary {
  list-style: none; cursor: pointer; padding: 14px 18px; font-weight: 600;
  display: flex; justify-content: space-between; align-items: center;
}
.acc summary::-webkit-details-marker { display: none; }
.acc summary::after { content: "+"; font-size: 20px; color: var(--accent); }
.acc details[open] summary::after { content: "−"; }
.acc .acc-body { padding: 0 18px 16px; color: var(--muted); font-size: 15px; }

/* table */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; background: var(--card); }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 560px; }
th, td { border-bottom: 1px solid var(--line); padding: 12px 14px; text-align: left; vertical-align: top; }
th { background: var(--accent-soft); font-weight: 600; }
tr:last-child td { border-bottom: 0; }

/* lists */
.bullets { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.bullets li {
  background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 12px 16px 12px 36px;
  position: relative; font-size: 15px;
}
.bullets li::before { content: "·"; position: absolute; left: 16px; font-weight: 700; color: var(--accent); }
.numbered li { padding-left: 52px; counter-increment: n; }
.numbered { counter-reset: n; }
.numbered li::before { content: counter(n, decimal-leading-zero); font-family: var(--mono); font-size: 13px; left: 16px; top: 13px; }

/* flow (Cambodia) */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; counter-reset: f; }
.flow .card { position: relative; }
@media (max-width: 900px) { .flow { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .flow { grid-template-columns: 1fr; } }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { padding: 6px 16px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-weight: 600; font-size: 14.5px; }

/* mission board (California Day 7) */
.mission-board { display: grid; gap: 0; border: 1px solid var(--line); border-radius: 10px; background: var(--card); }
.mission-row { display: grid; grid-template-columns: 200px 1fr; gap: 16px; padding: 14px 20px; border-bottom: 1px solid var(--line); }
.mission-row:last-child { border-bottom: 0; }
.mission-row code { font-family: var(--mono); color: var(--accent); font-size: 13px; letter-spacing: .04em; }
@media (max-width: 560px) { .mission-row { grid-template-columns: 1fr; gap: 2px; } }

/* cta + footer */
.cta-band { background: var(--accent); color: #fff; padding: 64px 0; }
.cta-band .eyebrow { color: rgba(255,255,255,.8); }
.cta-band h2 { font-size: clamp(24px, 3vw, 32px); margin-bottom: 12px; }
.cta-band p { opacity: .9; max-width: 640px; }
.cta-band .btn { border-color: #fff; color: var(--accent); background: #fff; }
.site-foot { padding: 36px 0 48px; font-size: 13.5px; color: var(--muted); }
.site-foot .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; }
.site-foot b { color: var(--ink); font-family: var(--serif); }

/* index */
.programs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 900px) { .programs { grid-template-columns: 1fr; } }
.program { text-decoration: none; transition: transform .15s ease; }
.program:hover { transform: translateY(-3px); }
.program .photo { aspect-ratio: 4 / 3; }
.program .card-body .eyebrow { margin-bottom: 6px; }
.program.theme-ca .eyebrow, .program.theme-kh .eyebrow { color: var(--accent); }
.program .more { margin-top: 14px; color: var(--accent); font-weight: 600; font-size: 14.5px; }

/* mock form */
.mock-badge {
  display: inline-block; font-size: 12px; font-weight: 600; color: var(--accent-2);
  border: 1px dashed currentColor; border-radius: 6px; padding: 2px 10px; margin-bottom: 12px;
}
.form { display: grid; gap: 28px; }
.form fieldset {
  border: 1px solid var(--line); border-radius: 10px; background: var(--card);
  padding: 20px 22px 22px; margin: 0; min-width: 0;
}
.form legend { font-family: var(--serif); font-weight: 700; font-size: 17px; padding: 0 8px; margin-left: -8px; }
.fields { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 20px; }
.fields .full { grid-column: 1 / -1; }
@media (max-width: 640px) { .fields { grid-template-columns: 1fr; } }
.field { display: grid; gap: 6px; font-size: 14.5px; }
.field > span { font-weight: 600; }
.field > span em { color: var(--accent-2); font-style: normal; margin-left: 2px; }
.field small { color: var(--muted); font-size: 12.5px; }
.form input[type=text], .form input[type=email], .form input[type=tel], .form input[type=date],
.form input[type=number], .form select, .form textarea {
  font: inherit; font-size: 15px; color: var(--ink); background: var(--paper);
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; width: 100%;
}
.form textarea { min-height: 88px; resize: vertical; }
.form input:focus, .form select:focus, .form textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.options { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.options label { display: inline-flex; align-items: center; gap: 6px; font-size: 14.5px; cursor: pointer; }
.options input { accent-color: var(--accent); width: 16px; height: 16px; }
.plan-options { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
@media (max-width: 560px) { .plan-options { grid-template-columns: 1fr; } }
.plan-options label {
  display: block; border: 1.5px solid var(--line); border-radius: 10px; padding: 14px 16px; cursor: pointer;
}
.plan-options label:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.plan-options input { accent-color: var(--accent); margin-right: 6px; }
.plan-options b { font-family: var(--serif); font-size: 18px; display: block; margin-top: 4px; }
.stepper { display: inline-flex; align-items: center; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; background: var(--paper); }
.stepper button { width: 40px; height: 38px; border: 0; background: none; font-size: 18px; color: var(--accent); cursor: pointer; }
.stepper button:disabled { color: var(--line); cursor: default; }
.stepper output { min-width: 36px; text-align: center; font-weight: 700; }
.student { border-top: 1px dashed var(--line); padding-top: 18px; margin-top: 18px; }
.student h4 { margin: 0 0 12px; font-size: 15px; color: var(--accent); }
.total-bar {
  position: sticky; bottom: 0; z-index: 5; display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px;
  justify-content: space-between; background: var(--ink); color: #fff; border-radius: 10px; padding: 14px 20px;
}
.total-bar .sum { font-family: var(--serif); font-size: 22px; font-weight: 700; }
.total-bar small { display: block; opacity: .7; font-size: 12.5px; }
.total-bar .btn { background: #fff; color: var(--ink); border-color: #fff; }
.form-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.result {
  border: 2px solid var(--accent); border-radius: 10px; background: var(--card); padding: 22px 24px;
}
.result h3 { font-size: 20px; margin-bottom: 8px; }
.result dl { display: grid; grid-template-columns: 140px 1fr; gap: 6px 16px; margin: 16px 0 0; font-size: 14.5px; }
.result dt { color: var(--muted); }
.result dd { margin: 0; word-break: break-word; }
@media (max-width: 560px) { .result dl { grid-template-columns: 1fr; } .result dd { margin-bottom: 8px; } }
.field .stepper { justify-self: start; }