/* ---------- design tokens ---------- */
:root{
  --navy-900:#06142b;
  --navy-800:#0b1f3a;
  --navy-700:#13294b;
  --navy-100:#eef2f8;
  --gold:#c9a25a;
  --gold-2:#d8b46a;
  --ink:#0f172a;
  --ink-2:#334155;
  --muted:#64748b;
  --line:#e2e8f0;
  --bg:#fafbfc;
  --white:#ffffff;
  --danger:#b91c1c;
  --ok:#0f766e;
  --shadow-sm: 0 1px 2px rgba(15,23,42,.06);
  --shadow-md: 0 8px 24px rgba(15,23,42,.08);
  --shadow-lg: 0 24px 60px rgba(15,23,42,.14);
  --radius: 12px;
  --radius-sm: 8px;
  --max: 1180px;
  --serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a{color:var(--navy-700);text-decoration:none}
a:hover{color:var(--navy-900)}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}
.muted{color:var(--muted)}
.small{font-size:13px}
h1,h2,h3,h4{font-family:var(--serif);color:var(--navy-900);letter-spacing:-0.01em;line-height:1.2;margin:0 0 .6em}
h1{font-size:clamp(34px,4.4vw,56px);font-weight:700}
h2{font-size:clamp(26px,2.6vw,36px);font-weight:600}
h3{font-size:20px;font-weight:600}
p{margin:0 0 1em;color:var(--ink-2)}
hr{border:0;border-top:1px solid var(--line);margin:36px 0}

/* ---------- nav ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--navy-900);font-weight:700;font-size:19px}
.brand:hover{color:var(--navy-900)}
.brand-mark{
  display:inline-grid;place-items:center;
  width:34px;height:34px;border-radius:9px;
  background:linear-gradient(135deg,var(--navy-800),var(--navy-700));
  color:var(--gold-2);font-weight:800;font-family:var(--serif);font-size:20px;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.06), 0 1px 2px rgba(0,0,0,.2);
}
.brand.small .brand-mark{width:28px;height:28px;font-size:17px}
.nav-links{display:flex;gap:28px}
.nav-links a{color:var(--ink-2);font-weight:500;font-size:14px}
.nav-links a:hover{color:var(--navy-900)}
.nav-links a.active{color:var(--navy-900)}
@media (max-width:720px){.nav-links{display:none}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 18px;border-radius:10px;font-weight:600;font-size:14px;
  border:1px solid transparent;cursor:pointer;transition:all .15s ease;
  font-family:var(--sans);
}
.btn-sm{padding:9px 14px;font-size:13px}
.btn-lg{padding:15px 24px;font-size:15px}
.btn-primary{background:var(--navy-900);color:#fff;border-color:var(--navy-900)}
.btn-primary:hover{background:var(--navy-800);transform:translateY(-1px);box-shadow:var(--shadow-md);color:#fff}
.btn-gold{background:var(--gold);color:var(--navy-900);border-color:var(--gold)}
.btn-gold:hover{background:var(--gold-2);color:var(--navy-900)}
.btn-ghost{background:transparent;color:var(--navy-900);border-color:var(--line)}
.btn-ghost:hover{background:var(--white);border-color:var(--navy-900)}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(1100px 500px at 80% -20%, rgba(201,162,90,.18), transparent 60%),
    radial-gradient(900px 600px at -10% 10%, rgba(19,41,75,.12), transparent 60%),
    linear-gradient(180deg, #fff 0%, var(--bg) 100%);
  border-bottom:1px solid var(--line);
}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;padding:88px 0 96px}
@media (max-width:920px){.hero-inner{grid-template-columns:1fr;padding:64px 0 56px}}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.12em;text-transform:uppercase;font-weight:600;
  color:var(--navy-700);background:rgba(201,162,90,.12);
  padding:6px 10px;border-radius:999px;border:1px solid rgba(201,162,90,.35);
  margin-bottom:20px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:999px;background:var(--gold)}
.hero h1 em{font-style:normal;color:var(--gold);font-family:var(--serif)}
.hero p.lede{font-size:18px;color:var(--ink-2);max-width:560px}
.hero-ctas{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.trust{display:flex;gap:28px;margin-top:36px;flex-wrap:wrap;color:var(--muted);font-size:13px}
.trust div{display:flex;align-items:center;gap:8px}
.trust svg{flex:0 0 auto}

/* hero card */
.hero-card{
  background:var(--white);border:1px solid var(--line);border-radius:16px;
  box-shadow:var(--shadow-lg);padding:22px;
}
.hc-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line)}
.hc-head .pill{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ok);background:rgba(15,118,110,.08);padding:4px 8px;border-radius:999px;font-weight:600}
.hc-bubble{margin-top:14px;padding:14px 16px;border-radius:12px;font-size:14px;line-height:1.55}
.hc-bubble.user{background:var(--navy-100);color:var(--navy-900)}
.hc-bubble.ai{background:#fff;border:1px solid var(--line);color:var(--ink-2)}
.hc-bubble.ai .src{font-size:11px;color:var(--muted);margin-top:8px;border-top:1px dashed var(--line);padding-top:6px}

/* ---------- sections ---------- */
section.block{padding:84px 0}
section.block.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:740px;margin:0 auto 48px;text-align:center}
.section-head .eyebrow{margin-inline:auto}

.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media (max-width:880px){.feature-grid{grid-template-columns:1fr}}
.feature{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px;
  transition:all .2s ease;
}
.feature:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:#cbd5e1}
.feature .icon{
  width:42px;height:42px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--navy-800),var(--navy-700));color:var(--gold-2);margin-bottom:16px;
}
.feature h3{margin-bottom:8px}
.feature p{font-size:14px;margin:0}

/* topics */
.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media (max-width:880px){.topic-grid{grid-template-columns:repeat(2,1fr)}}
.topic{
  background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px;
  font-size:14px;color:var(--ink-2);font-weight:500;display:flex;gap:10px;align-items:flex-start;
}
.topic .tdot{flex:0 0 auto;width:8px;height:8px;border-radius:999px;background:var(--gold);margin-top:7px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
@media (max-width:880px){.steps{grid-template-columns:1fr}}
.step .num{
  font-family:var(--serif);font-weight:700;font-size:22px;color:var(--gold);
  width:42px;height:42px;border-radius:50%;border:1px solid var(--gold);display:grid;place-items:center;margin-bottom:14px;
}

/* pricing */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
@media (max-width:880px){.price-grid{grid-template-columns:1fr}}
.price-card{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:32px;display:flex;flex-direction:column;
}
.price-card.featured{border-color:var(--navy-900);box-shadow:var(--shadow-lg);position:relative}
.price-card.featured::before{
  content:'Most Popular';position:absolute;top:-12px;left:50%;transform:translateX(-50%);
  background:var(--gold);color:var(--navy-900);font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  padding:5px 12px;border-radius:999px;
}
.price-card h3{font-family:var(--sans);font-size:14px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:600}
.price-card .amt{font-family:var(--serif);font-size:48px;font-weight:700;color:var(--navy-900);margin:6px 0 0}
.price-card .amt sup{font-size:22px;color:var(--muted);font-weight:600;vertical-align:super;margin-right:2px}
.price-card .per{color:var(--muted);font-size:13px;margin-bottom:18px}
.price-card ul{list-style:none;margin:0 0 24px;padding:0}
.price-card li{padding:8px 0;border-top:1px dashed var(--line);font-size:14px;color:var(--ink-2);display:flex;gap:10px}
.price-card li:first-child{border-top:0}
.price-card li::before{content:'✓';color:var(--ok);font-weight:700}
.price-card .btn{margin-top:auto;width:100%}

/* single pricing card */
.pricing-solo{max-width:760px;margin:0 auto;padding:40px;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow-md);background:#fff}
.ps-head{display:flex;justify-content:space-between;align-items:center;gap:12px;border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:20px}
.ps-head h3{font-family:var(--serif);font-size:24px;letter-spacing:-.01em;text-transform:none;color:var(--navy-900);margin:0;font-weight:700}
.badge-soft{background:rgba(201,162,90,.14);color:#8a6a2b;border:1px solid rgba(201,162,90,.4);font-size:11px;letter-spacing:.1em;text-transform:uppercase;font-weight:700;padding:6px 12px;border-radius:999px}
.ps-lede{font-size:16px;color:var(--ink-2);margin:0 0 28px}
.ps-factors{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:28px}
@media (max-width:700px){.ps-factors{grid-template-columns:1fr}}
.ps-factor{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:22px}
.ps-factor h4{font-family:var(--sans);font-size:14px;color:var(--navy-900);margin:0 0 6px;font-weight:700}
.ps-factor p{font-size:13.5px;color:var(--ink-2);margin:0;line-height:1.55}
.ps-factor-icon{width:36px;height:36px;border-radius:9px;display:grid;place-items:center;background:linear-gradient(135deg,var(--navy-800),var(--navy-700));color:var(--gold-2);margin-bottom:12px}
.ps-howitworks{display:grid;gap:10px;background:var(--navy-100);border-radius:12px;padding:20px;margin-bottom:28px;font-size:14px;color:var(--ink-2)}
.ps-howitworks strong{color:var(--navy-900)}
.ps-cta{display:inline-flex;width:auto}
.ps-foot{margin:14px 0 0}

/* assistant */
.assistant-wrap{display:grid;grid-template-columns:1fr 320px;gap:20px;max-width:var(--max);margin:0 auto;padding:28px 24px 64px}
@media (max-width:920px){.assistant-wrap{grid-template-columns:1fr}}
.chat-shell{background:#fff;border:1px solid var(--line);border-radius:18px;display:flex;flex-direction:column;min-height:74vh;overflow:hidden;box-shadow:var(--shadow-md)}
.chat-head{padding:14px 20px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;background:linear-gradient(180deg,#fff,#fafbfc)}
.chat-head .head-l{display:flex;align-items:center;gap:12px}
.chat-head .head-avatar{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;background:linear-gradient(135deg,var(--navy-800),var(--navy-700));color:var(--gold-2);font-family:var(--serif);font-weight:800;font-size:18px;box-shadow:inset 0 0 0 1px rgba(255,255,255,.06)}
.chat-head .head-meta h2{margin:0;font-size:15.5px;font-family:var(--sans);font-weight:600;color:var(--navy-900)}
.chat-head .head-meta .sub{font-size:11.5px;color:var(--muted)}
.chat-head .badge{font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--ok);font-weight:700}
.chat-head .badge .ind{display:inline-block;width:7px;height:7px;border-radius:999px;background:var(--ok);margin-right:6px;animation:pulse 2s infinite;box-shadow:0 0 0 0 rgba(15,118,110,.45)}
@keyframes pulse{0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(15,118,110,.45)}50%{opacity:.55;box-shadow:0 0 0 4px rgba(15,118,110,0)}}

.chat-body{
  flex:1;overflow-y:auto;padding:18px 18px 14px;
  display:flex;flex-direction:column;gap:8px;
  background:linear-gradient(180deg,#fbfcfd 0%,#f7f8fb 100%);
  scroll-behavior:smooth;
}
.chat-body::-webkit-scrollbar{width:8px}
.chat-body::-webkit-scrollbar-thumb{background:#d4dbe5;border-radius:8px}
.chat-body::-webkit-scrollbar-thumb:hover{background:#b9c2d0}

.msg{
  max-width:80%;padding:9px 13px;border-radius:13px;
  font-size:14px;line-height:1.5;white-space:pre-wrap;word-wrap:break-word;
  animation:msgIn .22s ease-out both;
}
@keyframes msgIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.msg.user{align-self:flex-end;background:var(--navy-900);color:#fff;border-bottom-right-radius:4px;box-shadow:0 1px 2px rgba(15,23,42,.08)}
.msg.ai{align-self:flex-start;background:#fff;color:var(--ink-2);border:1px solid var(--line);border-bottom-left-radius:4px;box-shadow:0 1px 1px rgba(15,23,42,.03)}
.msg.sys{
  align-self:center;background:rgba(255,255,255,.6);color:var(--muted);
  font-size:11.5px;text-align:center;border:1px dashed var(--line);
  border-radius:8px;padding:7px 12px;max-width:92%;
}

.msg.thinking{
  align-self:flex-start;background:#fff;border:1px solid var(--line);
  border-bottom-left-radius:4px;color:var(--muted);font-style:italic;
  font-size:13px;padding:8px 13px;display:inline-flex;align-items:center;gap:10px;
}
.msg.thinking .thinking-text{transition:opacity .25s ease}
.thinking-dots{display:inline-flex;gap:3px;align-items:center}
.thinking-dots span{width:5px;height:5px;border-radius:50%;background:var(--gold);animation:bounce 1.2s infinite}
.thinking-dots span:nth-child(2){animation-delay:.15s}
.thinking-dots span:nth-child(3){animation-delay:.3s}
@keyframes bounce{0%,80%,100%{transform:translateY(0);opacity:.35}40%{transform:translateY(-3px);opacity:1}}

.chat-input{display:flex;gap:8px;padding:12px 14px;border-top:1px solid var(--line);background:#fff;align-items:flex-end}
.chat-input textarea{
  flex:1;border:1px solid var(--line);border-radius:10px;padding:10px 12px;
  font-family:var(--sans);font-size:14px;line-height:1.45;resize:none;min-height:42px;max-height:160px;
  color:var(--ink);background:#fff;outline:none;transition:border .15s, box-shadow .15s;
}
.chat-input textarea:focus{border-color:var(--navy-700);box-shadow:0 0 0 3px rgba(19,41,75,.1)}
.chat-input button{height:42px;padding:0 16px;font-size:13.5px}

.aside{display:flex;flex-direction:column;gap:16px}
.aside-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px}
.aside-card h4{font-family:var(--sans);font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 10px;font-weight:600}
.aside-card p{font-size:13.5px;margin:0 0 8px}
.aside-card.warning{border-color:#fcd34d;background:#fffbeb}
.aside-card.warning h4{color:#b45309}
.suggest{display:flex;flex-direction:column;gap:8px}
.suggest button{
  text-align:left;background:#fff;border:1px solid var(--line);border-radius:8px;
  padding:10px 12px;font-size:13px;color:var(--ink-2);cursor:pointer;transition:all .15s;
}
.suggest button:hover{border-color:var(--navy-700);background:var(--navy-100);color:var(--navy-900)}

/* legal pages */
.legal{max-width:820px;margin:0 auto;padding:64px 24px}
.legal h1{font-size:38px;margin-bottom:8px}
.legal .updated{color:var(--muted);font-size:13px;margin-bottom:32px}
.legal h2{font-size:22px;margin-top:36px}
.legal p,.legal li{color:var(--ink-2);font-size:15px}
.legal ul{padding-left:22px}
.legal a{color:var(--navy-700);text-decoration:underline}

/* about */
.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:48px;align-items:start}
@media (max-width:880px){.about-grid{grid-template-columns:1fr}}
.kpi{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:24px}
.kpi .k{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px}
.kpi .k .n{font-family:var(--serif);font-size:30px;color:var(--navy-900);font-weight:700}
.kpi .k .l{font-size:13px;color:var(--muted)}

/* footer */
.footer{background:var(--navy-900);color:#cbd5e1;padding:64px 0 32px;margin-top:32px}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px}
@media (max-width:880px){.footer-inner{grid-template-columns:1fr 1fr}}
.foot-col h4{color:#fff;font-family:var(--sans);font-size:13px;letter-spacing:.08em;text-transform:uppercase;margin:0 0 14px;font-weight:600}
.foot-col a{display:block;color:#94a3b8;font-size:14px;padding:4px 0}
.foot-col a:hover{color:var(--gold-2)}
.foot-col p{color:#94a3b8;font-size:13px}
.foot-col .brand{color:#fff;margin-bottom:12px}
.copyright{border-top:1px solid rgba(255,255,255,.08);margin-top:36px;padding-top:24px;font-size:12.5px;color:#64748b}

/* usage indicator (under chat input) */
.usage-pill{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;color:var(--muted);
  padding:0 16px 12px;background:#fff;
}
.usage-pill .dot-on{display:inline-block;width:6px;height:6px;border-radius:999px;background:var(--ok)}
.usage-pill.warn{color:#b45309}
.usage-pill.warn .dot-on{background:#f59e0b}

/* signup modal */
.modal-backdrop{
  position:fixed;inset:0;z-index:200;
  background:rgba(6,20,43,.55);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  display:grid;place-items:center;
  padding:20px;
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .28s ease, visibility 0s linear .28s;
}
.modal-backdrop.show{
  opacity:1;visibility:visible;pointer-events:auto;
  transition:opacity .28s ease, visibility 0s linear 0s;
}
.modal{
  position:relative;
  background:#fff;border-radius:18px;
  width:100%;max-width:440px;
  padding:34px 30px 26px;
  box-shadow:0 30px 80px rgba(15,23,42,.3), 0 2px 6px rgba(15,23,42,.08);
  transform:translateY(20px) scale(.96);
  opacity:0;
  transition:transform .38s cubic-bezier(.16,1,.3,1), opacity .25s ease;
}
.modal-backdrop.show .modal{transform:translateY(0) scale(1);opacity:1}
.modal-close{
  position:absolute;top:12px;right:12px;
  width:32px;height:32px;border:0;background:transparent;
  font-size:22px;line-height:1;color:var(--muted);cursor:pointer;
  border-radius:8px;transition:background .15s, color .15s;
}
.modal-close:hover{background:var(--bg);color:var(--ink)}
.modal-icon{
  width:52px;height:52px;border-radius:13px;
  background:linear-gradient(135deg,var(--navy-800),var(--navy-700));
  color:var(--gold-2);
  display:grid;place-items:center;margin-bottom:18px;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.06);
}
.modal h2{font-size:22px;margin:0 0 8px;line-height:1.25}
.modal>p{font-size:14px;margin:0 0 22px;color:var(--ink-2);line-height:1.5}
.modal form{display:flex;flex-direction:column;gap:12px}
.field{display:flex;flex-direction:column;gap:6px}
.field>span{font-size:12px;color:var(--muted);font-weight:600;letter-spacing:.02em}
.field input{
  padding:11px 13px;border:1px solid var(--line);border-radius:10px;
  font-family:var(--sans);font-size:14px;color:var(--ink);background:#fff;
  outline:none;transition:border .15s, box-shadow .15s;
}
.field input:focus{border-color:var(--navy-700);box-shadow:0 0 0 3px rgba(19,41,75,.1)}
.modal-error{
  margin:2px 0 0;min-height:18px;font-size:13px;color:var(--danger);
}
.modal-submit{margin-top:6px;width:100%}
.modal-submit:disabled{opacity:.6;cursor:not-allowed}
.modal-foot{margin:14px 0 0;text-align:center}

/* misc */
.banner{
  background:linear-gradient(135deg,var(--navy-900),var(--navy-700));
  color:#fff;border-radius:16px;padding:48px;text-align:center;margin:48px auto;max-width:var(--max);
  position:relative;overflow:hidden;
}
.banner::before{
  content:'';position:absolute;inset:0;
  background:radial-gradient(600px 200px at 50% -20%, rgba(201,162,90,.3), transparent 60%);
}
.banner h2{color:#fff;position:relative}
.banner p{color:#cbd5e1;max-width:560px;margin:0 auto 24px;position:relative}
.banner .btn{position:relative}