/* New York Free Tour — design system
   System fonts only (no external requests), mobile-first, accessible. */

:root {
  --ink:      #0f1e38;   /* deep navy */
  --ink-soft: #33415c;
  --paper:    #ffffff;
  --paper-2:  #f6f8fb;
  --line:     #e2e8f2;
  --amber:    #f5a623;   /* NYC taxi accent */
  --amber-d:  #d98a09;
  --sky:      #1f6feb;
  --sky-d:    #1554c0;
  --good:     #1a8f5c;
  --muted:    #5b6b86;
  --shadow:   0 6px 24px rgba(15,30,56,.10);
  --shadow-sm:0 2px 8px rgba(15,30,56,.08);
  --radius:   14px;
  --wrap:     1160px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
          "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
}

*,*::before,*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; font-family: var(--font); color: var(--ink);
  background: var(--paper); line-height: 1.65; font-size: 18px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--sky-d); text-decoration: none; }
a:hover { text-decoration: underline; }
h1,h2,h3,h4 { line-height: 1.2; color: var(--ink); margin: 0 0 .5em; font-weight: 800; letter-spacing: -.02em; }
h1 { font-size: clamp(2rem, 5vw, 3.1rem); }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.1rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1.1em; }
ul,ol { margin: 0 0 1.1em; padding-left: 1.3em; }
li { margin: .35em 0; }
.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: 20px; }
.center { text-align: center; }
.muted { color: var(--muted); }
.small { font-size: .92rem; }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92);
  backdrop-filter: saturate(1.4) blur(8px); border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; gap: 1.5rem; height: 66px; }
.brand { font-weight: 900; font-size: 1.15rem; letter-spacing: -.03em; color: var(--ink);
  display: inline-flex; align-items: center; gap: .5rem; }
.brand:hover { text-decoration: none; }
.brand .dot { color: var(--amber); }
.nav-links { display: flex; gap: 1.15rem; margin-left: auto; align-items: center; flex-wrap: wrap; }
.nav-links a { color: var(--ink-soft); font-weight: 600; font-size: .98rem; }
.nav-links a:hover { color: var(--ink); text-decoration: none; }
.nav-cta { background: var(--amber); color: var(--ink) !important; padding: .5rem .95rem;
  border-radius: 999px; font-weight: 800; }
.nav-cta:hover { background: var(--amber-d); text-decoration: none; }
.nav-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--line);
  border-radius: 10px; padding: .4rem .6rem; font-size: 1.3rem; cursor: pointer; }

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav-links { display: none; position: absolute; top: 66px; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 0; background: #fff;
    border-bottom: 1px solid var(--line); padding: .5rem 20px 1rem; box-shadow: var(--shadow); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: .6rem 0; width: 100%; }
  .nav-cta { margin-top: .4rem; }
}

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: .5rem; font-weight: 800;
  padding: .8rem 1.4rem; border-radius: 999px; border: 2px solid transparent; cursor: pointer;
  transition: transform .08s ease, background .15s ease; font-size: 1rem; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--amber); color: var(--ink); }
.btn-primary:hover { background: var(--amber-d); }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.7); }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #1a2d50; }

/* ---------- Hero ---------- */
.hero { position: relative; color: #fff; }
.hero picture, .hero img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero::after { content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(9,17,33,.55) 0%, rgba(9,17,33,.78) 100%); }
.hero-inner { position: relative; z-index: 2; padding: clamp(3.5rem, 9vw, 7rem) 0; max-width: 720px; }
.hero h1 { color: #fff; }
.hero p.lead { font-size: 1.2rem; color: #eaf0fb; margin-bottom: 1.6rem; }
.hero .btn-row { display: flex; gap: .8rem; flex-wrap: wrap; }
.eyebrow { display: inline-block; background: var(--amber); color: var(--ink);
  font-weight: 800; font-size: .8rem; letter-spacing: .06em; text-transform: uppercase;
  padding: .3rem .7rem; border-radius: 999px; margin-bottom: 1rem; }

/* ---------- Sections ---------- */
section { padding: clamp(2.6rem, 6vw, 4.5rem) 0; }
section.alt { background: var(--paper-2); }
.section-head { max-width: 720px; margin-bottom: 2rem; }
.section-head.center { margin-inline: auto; }

/* ---------- Grid & cards ---------- */
.grid { display: grid; gap: 1.4rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px){ .grid-3,.grid-4 { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 620px){ .grid-2,.grid-3,.grid-4 { grid-template-columns: 1fr; } }

.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm); transition: transform .12s ease, box-shadow .12s ease; }
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.card .thumb { aspect-ratio: 16/10; overflow: hidden; background: var(--paper-2); }
.card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.card .body { padding: 1.1rem 1.2rem 1.3rem; }
.card h3 { margin-bottom: .3rem; }
.card .body p { margin-bottom: .8rem; font-size: .98rem; color: var(--ink-soft); }
.card .meta { font-size: .85rem; color: var(--muted); display: flex; gap: 1rem; flex-wrap: wrap; }
.card-link { color: inherit; }
.card-link:hover { text-decoration: none; }

/* feature list with checks */
.checks { list-style: none; padding: 0; }
.checks li { position: relative; padding-left: 1.9rem; }
.checks li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--good);
  font-weight: 900; background: #e6f6ee; width: 1.35rem; height: 1.35rem; border-radius: 50%;
  display: grid; place-items: center; font-size: .8rem; }

/* stats */
.stats { display: flex; gap: 2.5rem; flex-wrap: wrap; }
.stat b { display: block; font-size: 2rem; color: var(--ink); line-height: 1; }
.stat span { color: var(--muted); font-size: .95rem; }

/* callout / placeholder */
.callout { border: 2px dashed var(--amber); background: #fff8ec; border-radius: var(--radius);
  padding: 1rem 1.2rem; margin: 1.4rem 0; font-size: .96rem; }
.callout b { color: var(--amber-d); }
.note { background: var(--paper-2); border-left: 4px solid var(--sky); border-radius: 8px;
  padding: .9rem 1.1rem; margin: 1.4rem 0; }

/* breadcrumbs */
.crumbs { font-size: .85rem; color: var(--muted); padding: 1rem 0 0; }
.crumbs a { color: var(--muted); }
.crumbs span { margin: 0 .4rem; }

/* two-column content */
.split { display: grid; grid-template-columns: 1.4fr 1fr; gap: 2.4rem; align-items: start; }
@media (max-width: 820px){ .split { grid-template-columns: 1fr; } }
.figure { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.figure figcaption { font-size: .8rem; color: var(--muted); padding: .5rem .2rem 0; }

/* FAQ */
.faq details { border: 1px solid var(--line); border-radius: 12px; margin-bottom: .8rem; background:#fff; }
.faq summary { cursor: pointer; padding: 1rem 1.2rem; font-weight: 700; list-style: none;
  display: flex; justify-content: space-between; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--amber-d); font-weight: 900; font-size: 1.3rem; }
.faq details[open] summary::after { content: "–"; }
.faq details[open] summary { border-bottom: 1px solid var(--line); }
.faq .answer { padding: 1rem 1.2rem 1.2rem; color: var(--ink-soft); }

/* CTA band */
.cta-band { background: var(--ink); color: #fff; border-radius: var(--radius);
  padding: clamp(2rem,5vw,3rem); text-align: center; }
.cta-band h2 { color: #fff; }
.cta-band p { color: #cdd7ea; max-width: 560px; margin-inline: auto; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: #b9c4da; padding: 3rem 0 2rem; margin-top: 2rem; }
.site-footer h4 { color: #fff; font-size: .95rem; text-transform: uppercase; letter-spacing: .05em; }
.site-footer a { color: #b9c4da; }
.site-footer a:hover { color: #fff; }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2rem; }
@media (max-width: 820px){ .foot-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px){ .foot-grid { grid-template-columns: 1fr; } }
.foot-grid ul { list-style: none; padding: 0; }
.foot-grid li { margin: .45rem 0; }
.foot-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 2rem; padding-top: 1.2rem;
  font-size: .85rem; color: #8f9cb5; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

/* skip link + focus */
.skip { position: absolute; left: -9999px; top: 0; z-index: 200; background: var(--ink);
  color: #fff; padding: .7rem 1rem; border-radius: 0 0 8px 0; }
.skip:focus { left: 0; text-decoration: none; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible,
textarea:focus-visible, summary:focus-visible {
  outline: 3px solid var(--sky); outline-offset: 2px; border-radius: 4px; }

/* booking form */
.book-form { background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.4rem; box-shadow: var(--shadow-sm); margin: 1.4rem 0; }
.book-form .fld { margin-bottom: 1rem; }
.book-form label { display: block; font-weight: 700; font-size: .95rem; margin-bottom: .35rem; color: var(--ink); }
.book-form input, .book-form select, .book-form textarea {
  width: 100%; font: inherit; font-size: 1rem; padding: .7rem .8rem; border: 1.5px solid var(--line);
  border-radius: 10px; background: var(--paper-2); color: var(--ink); }
.book-form input:focus, .book-form select:focus, .book-form textarea:focus {
  border-color: var(--sky); background: #fff; outline: none; }
.book-form textarea { resize: vertical; }
.book-form .fld-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; }
.book-form .fld-row .fld:nth-child(1) { grid-column: span 1; }
@media (max-width: 620px){ .book-form .fld-row { grid-template-columns: 1fr; } }
.book-form button[type=submit] { width: 100%; justify-content: center; font-size: 1.05rem; }
.book-form .hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.form-status { margin-top: 1rem; padding: 0; font-weight: 600; }
.form-status.show { padding: .9rem 1.1rem; border-radius: 10px; }
.form-status.ok  { background: #e6f6ee; color: #0d6a3f; border: 1px solid #b6e2c8; }
.form-status.err { background: #fdecec; color: #a11; border: 1px solid #f3c2c2; }
.book-form.sending button[type=submit] { opacity: .6; pointer-events: none; }
.field-bad { border-color: #e05555 !important; }

/* prose helper for article pages */
.prose { max-width: 760px; }
.prose h2 { margin-top: 2rem; }
.prose h3 { margin-top: 1.5rem; }
.prose img, .prose .figure { margin: 1.6rem 0; }