/* ====================================================================
   OSIRO HEALTH — Brand System
   Palette: black, deep greys, warm gold, off-white, white
   ==================================================================== */

:root {
  --black: #0A0A0A;
  --ink: #141414;
  --charcoal: #1F1F1F;
  --graphite: #2A2A2A;
  --slate: #4A4A4A;
  --grey: #6B6B6B;
  --grey-soft: #9A9A9A;
  --grey-line: #E2DFD9;
  --bone: #F5F2EC;
  --cream: #FAF8F3;
  --white: #FFFFFF;

  --gold: #C9A961;
  --gold-light: #D8BD7E;
  --gold-deep: #9C8244;
  --gold-soft: rgba(201, 169, 97, 0.12);

  --serif: 'Cormorant Garamond', 'Playfair Display', Georgia, serif;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', monospace;

  --container: 1280px;
  --container-narrow: 980px;

  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 16px;

  --shadow-sm: 0 2px 8px rgba(10, 10, 10, 0.04);
  --shadow: 0 12px 40px rgba(10, 10, 10, 0.08);
  --shadow-lg: 0 24px 60px rgba(10, 10, 10, 0.12);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 0.25s;
  --t: 0.45s;
  --t-slow: 0.8s;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  font-family: var(--sans);
  font-weight: 400;
  color: var(--ink);
  background: var(--cream);
  line-height: 1.55;
  font-size: 16px;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--t-fast) var(--ease); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.08;
  color: var(--ink);
}

h1 { font-size: clamp(2.6rem, 6.5vw, 5.2rem); font-weight: 300; }
h2 { font-size: clamp(2rem, 4vw, 3.4rem); font-weight: 300; }
h3 { font-size: clamp(1.5rem, 2.4vw, 2rem); }
h4 { font-size: 1.25rem; font-family: var(--sans); font-weight: 500; letter-spacing: 0.01em; }

p { color: var(--slate); }
.lede { font-size: clamp(1.05rem, 1.4vw, 1.25rem); color: var(--graphite); line-height: 1.6; }

.eyebrow {
  font-family: var(--sans);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--gold-deep);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--gold);
}

.gold { color: var(--gold-deep); }
.italic { font-style: italic; }

/* Layout */
.container { max-width: var(--container); margin: 0 auto; padding: 0 2rem; }
.container-narrow { max-width: var(--container-narrow); margin: 0 auto; padding: 0 2rem; }

section { padding: clamp(4rem, 9vw, 8rem) 0; position: relative; }

.grid { display: grid; gap: 2rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

/* Navigation */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.3rem 0;
  transition: all var(--t) var(--ease);
  background: rgba(250, 248, 243, 0.72);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--grey-line);
  background: rgba(250, 248, 243, 0.92);
}
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex; align-items: center; justify-content: space-between;
}
.brand {
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--ink);
  display: flex; align-items: center; gap: 0.5rem;
}
.brand-mark {
  width: 28px; height: 28px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold-light), var(--gold-deep));
  color: var(--ink);
  font-family: var(--serif);
  font-size: 0.9rem;
  font-weight: 600;
}
.brand-name { letter-spacing: 0.04em; }
.brand-name em { font-style: italic; color: var(--gold-deep); font-weight: 500; }

.nav-links { display: flex; align-items: center; gap: 2.4rem; }
.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--graphite);
  position: relative;
}
.nav-links a:hover { color: var(--gold-deep); }
.nav-links a.active { color: var(--ink); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 0; bottom: -6px;
  width: 14px; height: 1px; background: var(--gold);
}
.nav-cta { display: flex; align-items: center; gap: 1.4rem; }
.nav-signin {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--graphite);
}
.nav-signin:hover { color: var(--gold-deep); }
@media (max-width: 600px) {
  .nav-signin { display: none; }
}

@media (max-width: 800px) {
  .nav-links { display: none; }
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 0.6rem;
  padding: 0.9rem 1.7rem;
  font-size: 0.88rem; font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: 100px;
  transition: all var(--t-fast) var(--ease);
  border: 1px solid transparent;
  white-space: nowrap;
  cursor: pointer;
}
.btn-primary {
  background: var(--ink);
  color: var(--cream);
}
.btn-primary:hover { background: var(--gold-deep); color: var(--white); transform: translateY(-1px); }

.btn-gold {
  background: linear-gradient(135deg, var(--gold), var(--gold-deep));
  color: var(--ink);
  box-shadow: 0 4px 18px rgba(156, 130, 68, 0.25);
}
.btn-gold:hover { box-shadow: 0 8px 28px rgba(156, 130, 68, 0.4); transform: translateY(-1px); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--graphite);
}
.btn-ghost:hover { background: var(--ink); color: var(--cream); }

.btn-light {
  background: var(--white);
  color: var(--ink);
  border-color: var(--grey-line);
}
.btn-light:hover { border-color: var(--gold); color: var(--gold-deep); }

.btn-arrow::after {
  content: "→";
  font-size: 1.1em;
  transition: transform var(--t-fast) var(--ease);
}
.btn-arrow:hover::after { transform: translateX(3px); }

.btn-sm { padding: 0.6rem 1.2rem; font-size: 0.78rem; }
.btn-lg { padding: 1.1rem 2.2rem; font-size: 0.95rem; }

/* Hero patterns / dividers */
.divider-gold {
  width: 60px; height: 1px;
  background: var(--gold);
  margin: 1.5rem 0;
}
.divider-gold-center {
  width: 40px; height: 1px;
  background: var(--gold);
  margin: 1.5rem auto;
}

/* Cards */
.card {
  background: var(--white);
  border: 1px solid var(--grey-line);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--t) var(--ease);
}
.card:hover {
  border-color: var(--gold);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

/* Forms */
.field { margin-bottom: 1.25rem; }
.field label {
  display: block;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--graphite);
  margin-bottom: 0.5rem;
}
.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 0.9rem 1.1rem;
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--ink);
  background: var(--cream);
  border: 1px solid var(--grey-line);
  border-radius: var(--radius);
  transition: all var(--t-fast) var(--ease);
}
.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--gold);
  background: var(--white);
  box-shadow: 0 0 0 4px var(--gold-soft);
}
.field textarea { resize: vertical; min-height: 120px; }

/* Footer */
.footer {
  background: var(--ink);
  color: var(--bone);
  padding: 5rem 0 2.5rem;
  margin-top: 4rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 2.5rem; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }

.footer h5 {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.4rem;
}
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 0.7rem; }
.footer ul a { color: var(--grey-soft); font-size: 0.92rem; }
.footer ul a:hover { color: var(--gold-light); }
.footer .brand { color: var(--cream); margin-bottom: 1rem; }
.footer .brand em { color: var(--gold); }
.footer p { color: var(--grey-soft); font-size: 0.92rem; line-height: 1.7; }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 2.5rem;
  border-top: 1px solid var(--graphite);
  font-size: 0.82rem;
  color: var(--grey);
}
.footer-bottom-links { display: flex; gap: 2rem; }
.footer-bottom-links a:hover { color: var(--gold); }
@media (max-width: 600px) { .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; } }

/* Utility */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(20px); transition: all var(--t-slow) var(--ease); }
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal-stagger > * { opacity: 0; transform: translateY(20px); transition: all 0.7s var(--ease); }
.reveal-stagger.in > *:nth-child(1) { transition-delay: 0.05s; opacity: 1; transform: none; }
.reveal-stagger.in > *:nth-child(2) { transition-delay: 0.15s; opacity: 1; transform: none; }
.reveal-stagger.in > *:nth-child(3) { transition-delay: 0.25s; opacity: 1; transform: none; }
.reveal-stagger.in > *:nth-child(4) { transition-delay: 0.35s; opacity: 1; transform: none; }
.reveal-stagger.in > *:nth-child(5) { transition-delay: 0.45s; opacity: 1; transform: none; }
.reveal-stagger.in > *:nth-child(6) { transition-delay: 0.55s; opacity: 1; transform: none; }

/* Page header (sub-pages) */
.page-header {
  padding: 11rem 0 5rem;
  background: linear-gradient(180deg, var(--bone) 0%, var(--cream) 100%);
  border-bottom: 1px solid var(--grey-line);
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: "";
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--gold-soft), transparent 70%);
  pointer-events: none;
}
.page-header .container { position: relative; z-index: 1; }
.page-header h1 { max-width: 18ch; margin-top: 1rem; }
.page-header .lede { max-width: 60ch; margin-top: 1.4rem; }

/* Dark section */
.dark {
  background: var(--ink);
  color: var(--bone);
}
.dark h1, .dark h2, .dark h3, .dark h4 { color: var(--cream); }
.dark p { color: var(--grey-soft); }
.dark .eyebrow { color: var(--gold); }
.dark .eyebrow::before { background: var(--gold); }

/* Tag / pill */
.tag {
  display: inline-block;
  padding: 0.35rem 0.8rem;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold-deep);
  background: var(--gold-soft);
  border-radius: 100px;
  border: 1px solid rgba(201, 169, 97, 0.3);
}
.tag-dark { background: var(--graphite); color: var(--gold-light); border-color: var(--slate); }

/* Subtle bg accent */
.bg-bone { background: var(--bone); }
.bg-white { background: var(--white); }
.bg-ink { background: var(--ink); color: var(--bone); }

/* Number callout */
.stat-num {
  font-family: var(--serif);
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 300;
  color: var(--gold-deep);
  line-height: 1;
  display: block;
}
.stat-label {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grey);
  margin-top: 0.6rem;
}