/* Healthmate Posture AI: shared styles for the public website.
   Direction: Clinical Instrument (see docs/02-design-direction.md). */

:root {
  --workspace: #F8FAFC;
  --surface: #FFFFFF;
  --navy: #111C30;
  --navy-soft: #1B2942;
  --cyan: #06B6D4;
  --cyan-text: #0E7490;
  --text: #334155;
  --muted: #64748B;
  --border: #E2E8F0;
  --success: #15803D;
  --warning: #B45309;
  --error: #B91C1C;
  --on-navy: #E2E8F0;
  --on-navy-muted: #94A3B8;
  --radius: 12px;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

/* Lenis smooth scrolling: its required base rules, inlined from lenis.css */
html.lenis, html.lenis body { height: auto; }
.lenis:not(.lenis-autoToggle).lenis-stopped { overflow: clip; }
html.lenis, .lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis [data-lenis-prevent] { overscroll-behavior: contain; }
.lenis.lenis-smooth iframe { pointer-events: none; }
body {
  margin: 0;
  background: var(--workspace);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--cyan-text); }
:focus-visible { outline: 3px solid var(--cyan); outline-offset: 3px; border-radius: 4px; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
section { padding: 88px 0; }
h1, h2, h3 { color: var(--navy); font-weight: 600; line-height: 1.2; margin: 0; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.1rem, 4.6vw, 3.25rem); letter-spacing: -0.025em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); letter-spacing: -0.02em; }
h3 { font-size: 1.125rem; }
p { margin: 0; }
.label {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan-text);
}
.lede { font-size: 1.125rem; max-width: 36em; }
.section-head { max-width: 40em; margin-bottom: 48px; }
.section-head h2 { margin: 12px 0 16px; }

.skip {
  position: absolute; left: -9999px; top: 8px;
  background: var(--navy); color: #fff; padding: 10px 16px; border-radius: 8px; z-index: 20;
}
.skip:focus { left: 8px; }

/* Header */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10;
  background: rgba(248, 250, 252, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 68px; }
.wordmark { color: var(--navy); font-weight: 600; font-size: 1.125rem; text-decoration: none; letter-spacing: -0.01em; white-space: nowrap; }
.wordmark span { color: var(--cyan-text); font-family: var(--mono); font-weight: 500; font-size: 0.8rem; margin-left: 6px; letter-spacing: 0.04em; }
.nav ul { display: flex; gap: 28px; list-style: none; margin: 0; padding: 0; }
.nav ul a { color: var(--text); text-decoration: none; font-size: 0.95rem; padding: 12px 0; display: inline-block; }
.nav ul a:hover, .nav ul a[aria-current="page"] { color: var(--navy); }
.nav ul a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--cyan); }
.nav-actions { display: flex; align-items: center; gap: 16px; }
.nav-actions .login { color: var(--text); text-decoration: none; font-size: 0.95rem; }
.menu-toggle {
  display: none; min-height: 44px; padding: 0 14px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  font: 500 0.95rem var(--sans); color: var(--navy); cursor: pointer;
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 20px;
  border-radius: 10px; border: 1px solid transparent;
  font: 500 0.95rem var(--sans); text-decoration: none; cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-soft); }
.btn-secondary { background: var(--surface); color: var(--navy); border-color: var(--border); }
.btn-secondary:hover { border-color: #CBD5E1; }

/* Hero */
.hero { padding: 72px 0 88px; position: relative; overflow: hidden; }
.hero .wrap { position: relative; z-index: 1; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.hero h1 { margin: 16px 0 20px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-note { margin-top: 20px; font-size: 0.9rem; color: var(--muted); max-width: 34em; }

/* Inner page hero */
.page-hero { padding: 72px 0 56px; }
.page-hero h1 { font-size: clamp(1.9rem, 4vw, 2.75rem); margin: 16px 0 20px; max-width: 18em; }

/* Analysis panel: dark = AI analysis, draft */
.panel {
  background: var(--navy);
  border-radius: 16px;
  padding: 20px;
  color: var(--on-navy);
  box-shadow: 0 24px 48px -24px rgba(17, 28, 48, 0.45);
}
.panel-bar { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 16px; }
.panel-bar .label { color: var(--on-navy-muted); }
.tag {
  display: inline-block;
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 999px; white-space: nowrap;
}
.tag-draft { background: rgba(245, 158, 11, 0.14); color: #FCD34D; border: 1px solid rgba(245, 158, 11, 0.35); }
.panel-body { display: grid; grid-template-columns: 150px 1fr; gap: 20px; align-items: stretch; }
.figure { background: var(--navy-soft); border-radius: 10px; padding: 12px; }
.obs { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.obs li { background: var(--navy-soft); border-radius: 10px; padding: 12px 14px; }
.obs strong { display: block; color: #fff; font-weight: 500; font-size: 0.92rem; }
.obs span { font-family: var(--mono); font-size: 0.72rem; color: var(--on-navy-muted); letter-spacing: 0.03em; }
.panel-foot { margin-top: 14px; font-family: var(--mono); font-size: 0.7rem; color: var(--on-navy-muted); letter-spacing: 0.03em; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cards.two { grid-template-columns: repeat(2, 1fr); }
.cards.four { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; display: flex; flex-direction: column; gap: 12px;
}
.card p { font-size: 0.97rem; }
.card .who { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.card > a { margin-top: auto; padding-top: 8px; font-weight: 500; text-decoration: none; }
.card > a:hover { text-decoration: underline; }
.card ul { margin: 0; padding-left: 18px; font-size: 0.97rem; }
.card li { margin-bottom: 6px; }
.card li::marker { color: var(--cyan); }

/* Effects modelled on React Bits: Blur Text, Spotlight Card, Animated Content */
.card, .safe-item, .role { position: relative; overflow: hidden; }
.card::before, .safe-item::before, .role::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0;
  background: radial-gradient(260px circle at var(--mx, 50%) var(--my, 50%), rgba(6, 182, 212, 0.12), transparent 70%);
  transition: opacity 0.25s ease;
}
.safe-item::before { background: radial-gradient(260px circle at var(--mx, 50%) var(--my, 50%), rgba(6, 182, 212, 0.2), transparent 70%); }
.card:hover::before, .safe-item:hover::before, .role:hover::before { opacity: 1; }
@media (prefers-reduced-motion: no-preference) {
  .bt-word { display: inline-block; animation: bt-in 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) both; animation-delay: calc(var(--i) * 55ms); }
  @keyframes bt-in {
    from { opacity: 0; filter: blur(10px); transform: translateY(12px); }
    to { opacity: 1; filter: blur(0); transform: none; }
  }
  .rv { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
  .rv.rv-in { opacity: 1; transform: none; }
}

.band { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.band .card { background: var(--workspace); }

/* Steps */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; counter-reset: step; }
.steps li { counter-increment: step; border-top: 2px solid var(--navy); padding-top: 16px; }
.steps li::before {
  content: "0" counter(step);
  font-family: var(--mono); font-size: 0.8rem; color: var(--cyan-text); letter-spacing: 0.06em;
}
.steps h3 { margin: 8px 0; }
.steps p { font-size: 0.93rem; }
.steps.detailed { grid-template-columns: 1fr; gap: 0; max-width: 46em; }
.steps.detailed li { padding: 24px 0; border-top: 1px solid var(--border); }
.steps.detailed li:first-child { border-top: 2px solid var(--navy); }
.steps.detailed p + p { margin-top: 10px; }
.steps.detailed .limit { color: var(--muted); font-size: 0.9rem; }

/* Navy section */
.safe { background: var(--navy); color: var(--on-navy); }
.safe h2, .safe h3 { color: #fff; }
.safe .label { color: var(--cyan); }
.safe-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.safe-item { border: 1px solid rgba(226, 232, 240, 0.16); border-radius: var(--radius); padding: 24px; }
.safe-item h3 { margin-bottom: 8px; }
.safe-item p { font-size: 0.95rem; }
.safe a { color: var(--cyan); }

/* Notices */
.notice {
  border: 1px solid var(--border); border-left: 3px solid var(--cyan);
  background: var(--surface); border-radius: 10px; padding: 16px 20px; font-size: 0.95rem;
}
.notice.warn { border-left-color: var(--warning); }
.notice strong { color: var(--navy); }

/* Prose pages */
.prose { max-width: 44em; }
.prose h2 { font-size: 1.4rem; margin: 40px 0 12px; }
.prose h2:first-child { margin-top: 0; }
.prose p { margin-bottom: 14px; }
.prose ul { padding-left: 20px; margin: 0 0 14px; }
.prose li { margin-bottom: 8px; }
.prose li::marker { color: var(--cyan); }

/* FAQ */
.faq { max-width: 46em; }
.faq details { border-top: 1px solid var(--border); }
.faq details:last-child { border-bottom: 1px solid var(--border); }
.faq summary {
  cursor: pointer; padding: 18px 0; font-weight: 500; color: var(--navy); list-style: none;
  display: flex; justify-content: space-between; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--mono); color: var(--cyan-text); }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding: 0 0 18px; max-width: 40em; }

/* Forms */
.form { display: grid; gap: 18px; max-width: 34em; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field label { display: block; font-size: 0.9rem; font-weight: 500; color: var(--navy); margin-bottom: 6px; }
.field input, .field select, .field textarea {
  width: 100%; min-height: 44px; padding: 10px 12px;
  border: 1px solid #CBD5E1; border-radius: 10px; background: var(--surface);
  font: 400 1rem var(--sans); color: var(--text);
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 3px solid var(--cyan); outline-offset: 1px; border-color: var(--cyan-text); }
.form-result { display: none; }
.form-result.show { display: block; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }

/* Role picker on the login page */
.roles { display: grid; gap: 12px; max-width: 34em; }
.role {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px; text-decoration: none; color: var(--text);
}
.role:hover { border-color: var(--cyan-text); }
.role strong { display: block; color: var(--navy); font-weight: 600; }
.role span { font-size: 0.9rem; color: var(--muted); }
.role em { font-style: normal; color: var(--cyan-text); font-weight: 500; white-space: nowrap; }

/* CTA + footer */
.cta { text-align: center; }
.cta h2 { margin: 12px 0 16px; }
.cta p { max-width: 34em; margin: 0 auto; }
.cta .hero-actions { justify-content: center; }

.site-footer { border-top: 1px solid var(--border); background: var(--surface); padding: 56px 0 40px; font-size: 0.9rem; color: var(--muted); }
.foot-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 32px; margin-bottom: 40px; }
.foot-grid h3 { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); font-weight: 500; margin-bottom: 12px; }
.foot-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.site-footer a { color: var(--text); text-decoration: none; }
.site-footer a:hover { color: var(--navy); text-decoration: underline; }
.foot-base { border-top: 1px solid var(--border); padding-top: 24px; }
.disclaimer { margin-top: 8px; font-size: 0.82rem; max-width: 60em; }

@media (max-width: 960px) {
  .hero-grid, .split { grid-template-columns: 1fr; gap: 40px; }
  .cards, .cards.four, .safe-grid { grid-template-columns: 1fr; }
  .cards.two { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); gap: 28px 16px; }
  .steps.detailed { grid-template-columns: 1fr; gap: 0; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .menu-toggle { display: inline-flex; align-items: center; }
  .nav nav { display: none; position: absolute; top: 68px; left: 0; right: 0; background: var(--surface); border-bottom: 1px solid var(--border); padding: 8px 24px 16px; }
  .nav nav.open { display: block; }
  .nav ul { flex-direction: column; gap: 0; }
  .nav ul a { display: block; padding: 12px 0; }
  .nav ul a[aria-current="page"] { box-shadow: none; font-weight: 600; }
}
@media (max-width: 600px) {
  section { padding: 64px 0; }
  .hero { padding: 48px 0 64px; }
  .page-hero { padding: 48px 0 40px; }
  .steps { grid-template-columns: 1fr; }
  .panel-body { grid-template-columns: 1fr; }
  .figure svg { max-height: 220px; margin: 0 auto; }
  .nav-actions .login { display: none; }
  .form .row { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}