/* ==========================================================================
   Z·Pilot AI Native — shared design system
   White + brand pink. Clean, international, creator-friendly.
   ========================================================================== */

:root {
  /* Brand — locked to Z·Pilot logo color (do not introduce alternates) */
  --pink: #CD5E9D;          /* logo exact — rgb(205,94,157), HSL 326/53/59 */
  --pink-rgb: 205,94,157;   /* for rgba() glows/rings */
  --pink-600: #BC5491;      /* hover (~8% darker) */
  --pink-700: #A4476F;      /* active / pink text on white (≈5.8:1) */
  --pink-soft: #F7E3EF;     /* chip / hover bg only */
  --pink-tint: #FCF2F7;     /* very faint wash */

  /* Neutrals */
  --ink: #0A0A0A;           /* primary text */
  --ink-2: #666666;         /* secondary text */
  --ink-3: #999999;         /* tertiary text */
  --line: #E5E5E5;          /* borders / dividers */
  --line-2: #F0F0F0;
  --bg: #FFFFFF;            /* main bg */
  --bg-2: #FAFAFA;          /* near-white section bg */
  --card: #FFFFFF;

  /* Status */
  --green: #1F9D57;
  --green-soft: #E6F6EC;
  --blue: #2563EB;
  --blue-soft: #E8F0FE;
  --amber: #C77700;
  --amber-soft: #FFF3E0;
  --red: #DC2626;
  --red-soft: #FEECEC;
  --gray-soft: #F2F2F2;

  /* Geometry */
  --r-card: 14px;
  --r-btn: 9px;
  --r-pill: 999px;
  --maxw: 1200px;
  --pad-x: 64px;

  /* Shadow */
  --shadow-hover: 0 10px 30px rgba(10,10,10,0.08);
  --shadow-card: 0 1px 2px rgba(10,10,10,0.04);
  --shadow-pop: 0 16px 48px rgba(10,10,10,0.14);

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --t: 200ms var(--ease);

  --font: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 { margin: 0; font-weight: 700; line-height: 1.12; letter-spacing: -0.02em; text-wrap: balance; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

.h1 { font-size: 56px; line-height: 1.08; }
.h2 { font-size: 40px; line-height: 1.15; }
.h3 { font-size: 28px; line-height: 1.25; }
.h4 { font-size: 20px; font-weight: 600; line-height: 1.35; letter-spacing: -0.01em; }
.lead { font-size: 19px; line-height: 1.55; color: var(--ink-2); font-weight: 400; }
.small { font-size: 14px; line-height: 1.45; }
.mono { font-family: 'Inter', ui-monospace, monospace; font-variant-numeric: tabular-nums; }

.muted { color: var(--ink-2); }
.faint { color: var(--ink-3); }
.pink { color: var(--pink); }
.wrap { max-width: var(--maxw); margin: 0 auto; padding-left: var(--pad-x); padding-right: var(--pad-x); }
.section { padding-top: 64px; padding-bottom: 64px; }       /* tightened for a denser, community feel (was 112) */
.section + .section { padding-top: 60px; }

/* ---- Buttons ---------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid transparent; border-radius: var(--r-pill);
  font-weight: 600; font-size: 15px; letter-spacing: -0.01em;
  padding: 12px 22px; transition: all var(--t); white-space: nowrap;
}
.btn svg { width: 17px; height: 17px; stroke-width: 2.2; }
.btn-primary { background: var(--pink); color: #fff; }
.btn-primary:hover { background: var(--pink-600); transform: translateY(-1px); box-shadow: 0 6px 18px rgba(var(--pink-rgb),0.32); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--pink); color: var(--pink); }
.btn-quiet { background: transparent; color: var(--ink-2); padding: 10px 14px; }
.btn-quiet:hover { color: var(--ink); background: var(--bg-2); }
.btn-sm { padding: 8px 16px; font-size: 14px; }
.btn-lg { padding: 15px 30px; font-size: 16px; }

/* ---- Chips ------------------------------------------------------------ */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 500; line-height: 1; white-space: nowrap;
  padding: 7px 12px; border-radius: var(--r-pill);
  background: var(--bg-2); color: var(--ink-2); border: 1px solid var(--line);
  transition: all var(--t);
}
.chip-pink { background: var(--pink-soft); color: var(--pink-700); border-color: transparent; }
.chip-dot::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.chip.selectable { cursor: pointer; }
.chip.selectable:hover { border-color: var(--pink); color: var(--pink); }
.chip.is-on { background: var(--pink); color: #fff; border-color: var(--pink); }

.status { font-size: 12.5px; font-weight: 600; padding: 5px 11px; border-radius: var(--r-pill); display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.status::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.status-pink  { background: var(--pink-soft); color: var(--pink-700); }
.status-green { background: var(--green-soft); color: var(--green); }
.status-blue  { background: var(--blue-soft); color: var(--blue); }
.status-amber { background: var(--amber-soft); color: var(--amber); }
.status-red   { background: var(--red-soft); color: var(--red); }
.status-gray  { background: var(--gray-soft); color: var(--ink-2); }

/* ---- Cards ------------------------------------------------------------ */
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--r-card); transition: all var(--t);
}
.card-hover:hover { box-shadow: var(--shadow-hover); border-color: var(--pink); transform: translateY(-2px); }

/* ---- Inputs ----------------------------------------------------------- */
.field { display: flex; flex-direction: column; gap: 8px; }
.field > label { font-size: 14px; font-weight: 600; color: var(--ink); }
.field .hint { font-size: 13px; color: var(--ink-3); }
.input, .textarea, select.input {
  width: 100%; font-family: inherit; font-size: 15px; color: var(--ink);
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-btn);
  padding: 13px 15px; transition: all var(--t); outline: none;
}
.input { height: 48px; }
.textarea { min-height: 110px; resize: vertical; line-height: 1.5; }
.input::placeholder, .textarea::placeholder { color: var(--ink-3); }
.input:focus, .textarea:focus, select.input:focus {
  border-color: var(--pink); box-shadow: 0 0 0 3px rgba(var(--pink-rgb),0.12);
}

/* ---- Nav -------------------------------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: 60; height: 72px;
  display: flex; align-items: center;
  border-bottom: 1px solid transparent; transition: all var(--t);
}
.nav.scrolled { background: rgba(255,255,255,0.82); backdrop-filter: saturate(180%) blur(14px); border-bottom-color: var(--line); }
.nav .wrap { display: flex; align-items: center; gap: 20px; width: 100%; }
.logo { font-weight: 800; font-size: 21px; letter-spacing: -0.03em; display: inline-flex; align-items: baseline; white-space: nowrap; }
.logo .dot { color: var(--pink); }

/* image-based logo lockup (consistent across pages) */
.zlogo { display: inline-flex; align-items: center; gap: 11px; white-space: nowrap; flex-shrink: 0; }
.zlogo img { height: 26px; width: auto; display: block; }
.zlogo .sub { font-size: 12px; font-weight: 600; color: var(--ink-3); letter-spacing: 0.01em; line-height: 1; padding-left: 11px; border-left: 1px solid var(--line); }
.navlinks { display: flex; gap: 4px; margin-left: 8px; }
.navlinks a { font-size: 14px; font-weight: 500; color: var(--ink-2); padding: 8px 10px; border-radius: 8px; transition: all var(--t); white-space: nowrap; }
.navlinks a:hover { color: var(--ink); background: var(--bg-2); }
.navlinks a.active { color: var(--ink); }
.nav .right { margin-left: auto; display: flex; align-items: center; gap: 8px; }

.nav-search { width: 36px; height: 36px; border-radius: 9px; border: 1px solid var(--line); background: #fff; display: inline-flex; align-items: center; justify-content: center; color: var(--ink-2); transition: all var(--t); }
.nav-search:hover { border-color: var(--pink); color: var(--pink); }

/* language toggle */
.langtoggle { display: inline-flex; border: 1px solid var(--line); border-radius: var(--r-pill); overflow: hidden; height: 34px; }
.langtoggle button { background: transparent; border: 0; padding: 0 13px; font-size: 13px; font-weight: 600; color: var(--ink-3); transition: all var(--t); }
.langtoggle button.on { background: var(--ink); color: #fff; }

/* mobile nav — hamburger + dropdown panel (auto-built by zpilot.js) */
.nav-burger { display: none; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 9px; background: #fff; align-items: center; justify-content: center; color: var(--ink); cursor: pointer; transition: all var(--t); flex-shrink: 0; }
.nav-burger:hover { border-color: var(--pink); color: var(--pink); }
.nav-burger svg { width: 20px; height: 20px; }
.nav-mobile { position: absolute; top: 100%; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow-hover); padding: 8px 16px 14px; display: none; }
.nav.open .nav-mobile { display: block; }
.nav-mobile a { display: block; padding: 12px; border-radius: 9px; font-size: 15px; font-weight: 600; color: var(--ink); }
.nav-mobile a:hover { background: var(--bg-2); }
.nav-mobile a.active { color: var(--pink-700); background: var(--pink-soft); }
.nav-mobile .m-cta { margin-top: 10px; width: 100%; justify-content: center; }
@media (min-width: 981px) { .nav-mobile, .nav-burger { display: none !important; } }

/* ---- Footer ----------------------------------------------------------- */
.footer { background: var(--bg-2); border-top: 1px solid var(--line); padding: 56px 0 34px; }
.foot-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr 1.3fr; gap: 30px; }
.foot-grid h5 { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); margin: 0 0 16px; }
.foot-grid a { display: block; font-size: 14px; color: var(--ink-2); padding: 5px 0; }
.foot-grid a:hover { color: var(--pink); }
.subscribe { display: flex; gap: 8px; margin-top: 14px; }
.subscribe .input { height: 44px; }
.foot-bottom { display: flex; justify-content: space-between; align-items: center; margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); font-size: 13px; color: var(--ink-3); }
.socials { display: flex; gap: 10px; margin-top: 18px; }
.socials a { width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 9px; display: flex; align-items: center; justify-content: center; color: var(--ink-2); transition: all var(--t); }
.socials a:hover { border-color: var(--pink); color: var(--pink); }

/* ---- Page header / hero band (shared by list & content pages) --------- */
.pagehead { border-bottom: 1px solid var(--line); padding: 56px 0 40px; background: linear-gradient(180deg, var(--pink-tint), #fff); }
.pagehead .crumb { font-size: 13px; color: var(--ink-3); margin-bottom: 16px; }
.pagehead .crumb a:hover { color: var(--pink); }
.pagehead h1 { font-size: 40px; }
.pagehead .lead { margin-top: 12px; max-width: 60ch; }

/* filter bar */
.filterbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding: 22px 0; }
.filterbar .fb { padding: 8px 15px; font-size: 14px; font-weight: 600; color: var(--ink-2); background: #fff; border: 1px solid var(--line); border-radius: var(--r-pill); cursor: pointer; transition: all var(--t); }
.filterbar .fb:hover { border-color: var(--pink); color: var(--pink); }
.filterbar .fb.on { background: var(--pink); color: #fff; border-color: var(--pink); }
.filterbar .spacer { margin-left: auto; }

/* ---- Reveal animation ------------------------------------------------- */
.reveal { opacity: 0; transform: translateY(10px); transition: opacity 480ms var(--ease), transform 480ms var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---- Lang visibility -------------------------------------------------- */
html[data-lang="en"] .zh { display: none !important; }
html[data-lang="zh"] .en { display: none !important; }

/* ---- Utilities -------------------------------------------------------- */
.grid { display: grid; gap: 24px; }
.flex { display: flex; }
.between { display: flex; align-items: center; justify-content: space-between; }
.center { display: flex; align-items: center; }
.gap8 { gap: 8px; } .gap12 { gap: 12px; } .gap16 { gap: 16px; } .gap24 { gap: 24px; }
.eyebrow { font-size: 13px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--pink); }
.divider { height: 1px; background: var(--line); border: 0; margin: 0; }
.avatar { border-radius: 50%; object-fit: cover; background: var(--bg-2); }
.ratio-16-9 { aspect-ratio: 16/9; object-fit: cover; width: 100%; }
.ratio-1-1 { aspect-ratio: 1/1; object-fit: cover; width: 100%; }

@media (max-width: 980px) {
  :root { --pad-x: 24px; }
  .h1 { font-size: 40px; }
  .h2 { font-size: 30px; }
  .h3 { font-size: 23px; }
  .section { padding-top: 46px; padding-bottom: 46px; }
  .section + .section { padding-top: 44px; }
  .navlinks { display: none; }
  .nav-burger { display: inline-flex; }
  .nav .right .btn, .nav .right .nav-search { display: none; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .pagehead h1 { font-size: 30px; }
}