/* ============================================================
   Defuser AI — brand stylesheet
   Tokens extracted live from www.defuser.ai (2026-06-20):
   heading = ZT Nature (Medium) · body = Plus Jakarta Sans
   primary = #346DFF→#668CFF · headline gradient #6060F6→#3F3F77
   ============================================================ */

@font-face {
  font-family: "ZT Nature";
  src: url("/assets/brand/fonts/ZTNature-Medium.ttf") format("truetype");
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --brand: #346dff;
  --brand-light: #668cff;
  --brand-deep: #2563eb;
  --brand-darker: #1d4ed8;
  --cta-grad: linear-gradient(180deg, #668cff 0%, #346dff 100%);
  --head-grad: linear-gradient(135deg, #6060f6 0%, #3f3f77 100%);

  --ink: rgba(0, 0, 0, 0.87);
  --ink-soft: #374151;
  --muted: #4b5563;
  --muted-2: #6b7280;

  --bg: #ffffff;
  --soft: #eff6ff;
  --soft-2: #dbeafe;
  --sky-top: #cfe0ff;
  --line: #e5e7eb;
  --border-blue: #d1d9f8;
  --dark: #000000;

  --r: 16px;
  --r-lg: 24px;
  --r-sm: 12px;
  --shadow: 0 10px 30px rgba(52, 109, 255, 0.08);
  --shadow-lg: 0 24px 60px rgba(31, 41, 99, 0.12);
  --maxw: 1180px;

  --head: "ZT Nature", "Plus Jakarta Sans", system-ui, sans-serif;
  --body: "Plus Jakarta Sans", system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { font-family: var(--head); font-weight: 400; line-height: 1.12; letter-spacing: -0.02em; color: var(--ink); }
h1 { font-size: clamp(2.2rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.8rem, 3.6vw, 3rem); }
h3 { font-size: 1.3rem; letter-spacing: -0.01em; }
p { color: var(--muted); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.center { text-align: center; max-width: 760px; margin: 0 auto 44px; }
section { padding: 78px 0; }
.soft { background: var(--soft); }
.gradient-text {
  background: var(--head-grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; font-family: var(--body);
  font-weight: 600; font-size: .98rem; padding: 14px 28px; border-radius: var(--r);
  border: 1px solid transparent; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease; white-space: nowrap; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--cta-grad); color: #fff; box-shadow: 0 8px 22px rgba(52, 109, 255, 0.28); }
.btn-primary:hover { box-shadow: 0 12px 28px rgba(52, 109, 255, 0.38); }
.btn-ghost { background: rgba(255, 255, 255, 0.95); color: #1a1a1a; border-color: rgba(0, 0, 0, 0.1); }
.btn-light { background: #fff; color: var(--ink-soft); border-color: var(--border-blue); }
.btn-dark { background: #0b1220; color: #fff; }
.btn-dark:hover { background: #1a2438; }
.btn-pill { border-radius: 9999px; }

/* ---------- eyebrow / pills ---------- */
.eyebrow { display: inline-block; font-family: var(--body); font-weight: 700; font-size: .76rem;
  letter-spacing: .14em; text-transform: uppercase; color: var(--brand-deep); margin-bottom: 14px; }
.pill { display: inline-flex; align-items: center; gap: 8px; background: #fff; border: 1px solid var(--border-blue);
  border-radius: 9999px; padding: 7px 16px; font-size: .82rem; font-weight: 600; color: var(--ink-soft); box-shadow: var(--shadow); margin-bottom: 22px; }
.pill img { height: 18px; width: auto; }

/* ---------- nav ---------- */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px); border-bottom: 1px solid rgba(0, 0, 0, 0.06); }
.nav .wrap { display: flex; align-items: center; gap: 28px; height: 70px; }
.brand { display: flex; align-items: center; gap: 9px; font-family: var(--body); font-weight: 800;
  letter-spacing: .04em; font-size: 1.05rem; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand img { height: 30px; width: 30px; }
.brand .ac { color: var(--brand); }
.nav-links { display: flex; gap: 26px; margin-left: 8px; }
.nav-links a { font-size: .8rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.nav-links a:hover { color: var(--brand-deep); text-decoration: none; }
.nav-cta { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.nav-cta .login { font-size: .8rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.nav-toggle { display: none; }

/* ---------- hero ---------- */
.hero { position: relative; padding: 70px 0 90px;
  background: linear-gradient(180deg, var(--sky-top) 0%, var(--soft) 38%, #ffffff 100%); }
.hero .center { margin-bottom: 0; max-width: 820px; }
.hero h1 { margin-bottom: 18px; }
.hero .sub { font-size: 1.16rem; color: var(--muted); max-width: 640px; margin: 0 auto 30px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; justify-content: center; margin-top: 40px; flex-wrap: wrap; }
.hero-stats div { font-size: .9rem; color: var(--muted-2); display: flex; flex-direction: column; }
.hero-stats b { font-family: var(--head); font-size: 1.7rem; color: var(--brand-deep); }
.hero-visual { margin: 48px auto 0; max-width: 940px; }

/* ---------- chat card mock ---------- */
.chatcard { background: #fff; border: 1px solid var(--border-blue); border-radius: var(--r-lg);
  padding: 20px; box-shadow: var(--shadow-lg); max-width: 420px; display: flex; flex-direction: column; gap: 10px; }
.bub { padding: 11px 15px; border-radius: 16px; font-size: .92rem; max-width: 85%; line-height: 1.45; }
.bub.in { background: #f1f5f9; color: #1f2937; align-self: flex-start; border-bottom-left-radius: 4px; }
.bub.out { background: #25d366; color: #04331a; align-self: flex-end; border-bottom-right-radius: 4px; }

/* ---------- cards / grids ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card { background: #fff; border: 1px solid var(--border-blue); border-radius: var(--r-lg);
  padding: 28px; box-shadow: var(--shadow); transition: transform .18s ease, box-shadow .18s ease; }
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.card .ico { font-size: 1.9rem; margin-bottom: 14px; }
.card h3 { margin-bottom: 8px; }
.card p { font-size: .96rem; }

.uc-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.uc-grid span { background: #fff; border: 1px solid var(--border-blue); border-radius: var(--r);
  padding: 16px 18px; font-size: .92rem; font-weight: 600; color: var(--ink-soft); text-align: center; }

.feat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feat { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 22px; }
.feat h4 { font-family: var(--body); font-weight: 700; font-size: 1rem; color: var(--ink); margin-bottom: 7px; }
.feat p { font-size: .88rem; }

/* feature platform row */
.plat { display: flex; gap: 18px; align-items: center; justify-content: center; margin: 0 0 36px; flex-wrap: wrap; }
.plat span { display: inline-flex; align-items: center; gap: 7px; font-weight: 600; font-size: .9rem; color: var(--muted); }
.plat img { height: 26px; width: 26px; }

/* ---------- tabs ---------- */
.tabs { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 30px; }
.tab { border-radius: 9999px; padding: 10px 22px; font-weight: 600; font-size: .92rem; background: #fff;
  border: 1px solid var(--border-blue); color: var(--ink-soft); }
.tab.active { background: var(--brand-light); color: #fff; border-color: transparent; }
.panel { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: center;
  background: #fff; border: 1px solid var(--border-blue); border-radius: var(--r-lg); padding: 38px; box-shadow: var(--shadow); }
.panel h3 { margin-bottom: 12px; }
.chips { display: flex; gap: 10px; flex-wrap: wrap; margin: 16px 0; }
.chips span { background: var(--soft); color: var(--brand-deep); border-radius: 9999px; padding: 6px 14px; font-size: .82rem; font-weight: 600; }

/* ---------- dark section ---------- */
.dark-sec { background: var(--dark); color: #fff; }
.dark-sec h2, .dark-sec h3 { color: #fff; }
.dark-sec p { color: #cbd5e1; }
.dark-sec .eyebrow { color: var(--brand-light); }
.dark-sec .card { background: #0d1526; border-color: #1e293b; }
.dark-sec .card h3 { color: #fff; }
.dark-sec .card p { color: #94a3b8; }

/* ---------- comparison table ---------- */
.cmp { overflow-x: auto; border-radius: var(--r-lg); border: 1px solid var(--border-blue); box-shadow: var(--shadow); }
table.cmp-table { width: 100%; border-collapse: collapse; background: #fff; min-width: 640px; }
.cmp-table th, .cmp-table td { padding: 15px 18px; text-align: left; border-bottom: 1px solid var(--line); font-size: .95rem; }
.cmp-table thead th { background: var(--soft); font-family: var(--body); font-weight: 700; color: var(--ink); }
.cmp-table thead th.us { background: var(--brand); color: #fff; }
.cmp-table td.yes { color: #15803d; font-weight: 700; }
.cmp-table td.no { color: #b91c1c; }
.cmp-table tbody tr:nth-child(even) { background: #fafbff; }

/* ---------- prose / content ---------- */
.prose { max-width: 760px; margin: 0 auto; }
.prose h2 { margin: 40px 0 14px; }
.prose h3 { margin: 28px 0 10px; }
.prose p { margin-bottom: 16px; font-size: 1.05rem; color: var(--ink-soft); }
.prose ul, .prose ol { margin: 0 0 18px 22px; }
.prose li { margin-bottom: 8px; color: var(--ink-soft); }

/* ---------- FAQ ---------- */
.faq { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq details { background: #fff; border: 1px solid var(--border-blue); border-radius: var(--r); padding: 4px 22px; }
.faq summary { cursor: pointer; font-weight: 700; font-size: 1.02rem; color: var(--ink); padding: 16px 0; list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 14px; font-size: 1.4rem; color: var(--brand); font-weight: 400; }
.faq details[open] summary::after { content: "\2013"; }
.faq details p { padding: 0 0 18px; color: var(--muted); font-size: .98rem; }

/* ---------- final cta ---------- */
.final { background: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%); color: #fff; text-align: center; }
.final h2 { color: #fff; max-width: 720px; margin: 0 auto 16px; }
.final p { color: #dbeafe; max-width: 560px; margin: 0 auto 28px; font-size: 1.1rem; }

/* ---------- related links ---------- */
.related { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; }
.related a { background: #fff; border: 1px solid var(--border-blue); border-radius: var(--r);
  padding: 16px 18px; font-weight: 600; font-size: .94rem; color: var(--ink-soft); display: flex; justify-content: space-between; align-items: center; }
.related a:hover { border-color: var(--brand); color: var(--brand-deep); text-decoration: none; }
.related a span { color: var(--brand); }

/* ---------- breadcrumb ---------- */
.crumbs { font-size: .82rem; color: var(--muted-2); padding: 18px 0 0; }
.crumbs a { color: var(--muted-2); }
.crumbs a:hover { color: var(--brand-deep); }

/* ---------- author / EEAT ---------- */
.author { display: flex; gap: 16px; align-items: center; background: var(--soft); border: 1px solid var(--border-blue);
  border-radius: var(--r-lg); padding: 20px 24px; max-width: 760px; margin: 36px auto 0; }
.author .av { width: 56px; height: 56px; border-radius: 50%; background: var(--cta-grad); color: #fff;
  display: flex; align-items: center; justify-content: center; font-family: var(--head); font-size: 1.4rem; flex-shrink: 0; }
.author .meta b { display: block; color: var(--ink); font-size: 1rem; }
.author .meta span { font-size: .86rem; color: var(--muted); }

/* ---------- footer ---------- */
footer { background: #05080f; color: #94a3b8; padding: 56px 0 30px; }
footer .cols { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; margin-bottom: 30px; }
footer .fbrand { display: flex; align-items: center; gap: 9px; color: #fff; font-weight: 800; letter-spacing: .04em; }
footer .fbrand img { height: 28px; }
footer .fcol h5 { color: #fff; font-family: var(--body); font-size: .82rem; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 14px; }
footer .fcol a { display: block; color: #94a3b8; font-size: .9rem; margin-bottom: 9px; }
footer .fcol a:hover { color: #fff; text-decoration: none; }
footer .fgrid { display: flex; gap: 60px; flex-wrap: wrap; }
footer .legal { border-top: 1px solid #1e293b; padding-top: 22px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: .82rem; color: #64748b; }
footer .social { display: flex; gap: 14px; }

/* ---------- tool widgets ---------- */
.tool { max-width: 720px; margin: 0 auto; background: #fff; border: 1px solid var(--border-blue);
  border-radius: var(--r-lg); padding: 30px; box-shadow: var(--shadow-lg); }
.tool label { display: block; font-weight: 600; font-size: .9rem; color: var(--ink-soft); margin: 14px 0 6px; }
.tool input, .tool select, .tool textarea { width: 100%; padding: 12px 14px; border: 1px solid var(--border-blue);
  border-radius: var(--r-sm); font-family: var(--body); font-size: .98rem; color: var(--ink); background: #fff; }
.tool textarea { min-height: 90px; resize: vertical; }
.tool .row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.tool .out { margin-top: 20px; background: var(--soft); border: 1px dashed var(--border-blue); border-radius: var(--r-sm);
  padding: 16px; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .9rem; word-break: break-all; color: var(--brand-deep); min-height: 24px; }
.tool .toolbar { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.tool .note { font-size: .82rem; color: var(--muted-2); margin-top: 14px; }
.tool .qr { text-align: center; margin-top: 18px; }
.tool .qr img { display: inline-block; border: 1px solid var(--line); border-radius: var(--r-sm); padding: 8px; background: #fff; }
.tool .preview { margin-top: 16px; }

/* ---------- sitemap blueprint ---------- */
.sm-jump { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 30px; }
.sm-jump a { background: #fff; border: 1px solid var(--border-blue); border-radius: 9999px; padding: 8px 16px;
  font-size: .85rem; font-weight: 600; color: var(--ink-soft); display: inline-flex; gap: 8px; align-items: center; }
.sm-jump a:hover { border-color: var(--brand); color: var(--brand-deep); text-decoration: none; }
.sm-jump a b { background: var(--soft); color: var(--brand-deep); border-radius: 9999px; padding: 1px 8px; font-size: .78rem; }
.sm-sec { padding: 40px 0; border-top: 1px solid var(--line); }
.sm-sec:nth-child(even) { background: var(--soft); }
.sm-head { margin-bottom: 22px; }
.sm-head h2 { display: flex; align-items: center; gap: 12px; }
.sm-head p { margin-top: 6px; font-size: .95rem; }
.sm-count { background: var(--cta-grad); color: #fff; font-family: var(--body); font-size: .85rem; font-weight: 700;
  border-radius: 9999px; padding: 3px 12px; }
.sm-cols { column-width: 250px; column-gap: 28px; }
.sm-cols a { display: block; padding: 5px 0; font-size: .92rem; color: var(--ink-soft); break-inside: avoid; }
.sm-cols a:hover { color: var(--brand-deep); }
.sm-grp { border: 1px solid var(--border-blue); border-radius: var(--r); background: #fff; padding: 4px 18px; margin-bottom: 12px; }
.sm-grp > summary { cursor: pointer; font-weight: 700; padding: 12px 0; list-style: none; color: var(--ink); }
.sm-grp > summary::-webkit-details-marker { display: none; }
.sm-grp > summary em { color: var(--brand-deep); font-style: normal; font-weight: 600; font-size: .85rem; }
.sm-grp[open] > summary { border-bottom: 1px solid var(--line); margin-bottom: 10px; }
.sm-grp .sm-cols { padding-bottom: 12px; }

/* ---------- responsive ---------- */
@media (max-width: 920px) {
  .cards, .uc-grid, .feat-grid { grid-template-columns: repeat(2, 1fr); }
  .panel { grid-template-columns: 1fr; }
  .hero-visual { max-width: 100%; }
}
@media (max-width: 720px) {
  section { padding: 56px 0; }
  .nav-links, .nav-cta .login { display: none; }
  .nav-toggle { display: inline-flex; margin-left: auto; }
  .hero-stats { gap: 26px; }
  .uc-grid, .feat-grid { grid-template-columns: 1fr 1fr; }
  .cards { grid-template-columns: 1fr; }
  footer .cols { flex-direction: column; }
}
@media (max-width: 460px) {
  .feat-grid, .uc-grid { grid-template-columns: 1fr; }
}