/* ============================================
   Signal Psychology
   Editorial monochrome — Unseen / Oura / ETQ
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant:ital,wght@0,300;0,400;0,500;1,300;1,400&family=Inter:wght@400;500&display=swap');

:root {
  --bg: #F4F1EC;
  --surface: #FFFFFF;
  --text: #111111;
  --text-muted: #71706C;
  --border: #DAD7D1;
  --border-light: #E8E5E0;
  --hero-bg: #111111;
  --hero-text: #F4F1EC;
  --hero-muted: #8A8985;
  --accent: #B5705A;
  --accent-light: rgba(181, 112, 90, 0.12);
  --accent-hover: #9E5F4B;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Cormorant', 'Georgia', serif;
  --max-width: 1200px;
  --max-narrow: 680px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6.5rem;
  --space-2xl: 10rem;
  --radius: 0px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; scroll-behavior: smooth; }
body { font-family: var(--font-sans); color: var(--text); background: var(--bg); line-height: 1.7; font-size: 1rem; }
img { max-width: 100%; display: block; }
a { color: var(--text); text-decoration: none; }

/* Typography */
h1, h2, h3 { font-family: var(--font-serif); font-weight: 300; line-height: 1.1; }
h1 { font-size: clamp(2.75rem, 6vw, 4.5rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -0.015em; }
h3 { font-size: 1.5rem; font-weight: 400; }
p + p { margin-top: var(--space-sm); }

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

/* Animations */
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.reveal { animation: fadeIn 0.8s ease-out both; }
.reveal-d1 { animation-delay: 0.12s; }
.reveal-d2 { animation-delay: 0.24s; }
.reveal-d3 { animation-delay: 0.4s; }

/* ============================================
   Nav
   ============================================ */
.nav {
  padding: 1.25rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(244, 241, 236, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.nav::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
}
.nav--dark::before { background: var(--accent); opacity: 0.6; }

.nav .container { display: flex; align-items: center; justify-content: space-between; }

.nav__logo {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text);
}
.nav__logo:hover { color: var(--text); }

.nav__links { list-style: none; display: flex; gap: 2.5rem; }
.nav__links a {
  font-size: 0.8125rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  transition: color 0.3s ease;
}
.nav__links a:hover, .nav__links a.active { color: var(--accent); }

.nav__mobile-toggle { display: none; background: none; border: none; cursor: pointer; padding: var(--space-xs); }
.nav__mobile-toggle span { display: block; width: 18px; height: 1px; background: var(--text); margin: 5px 0; }

/* Dark nav */
.nav--dark { background: rgba(17, 17, 17, 0.92); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); }
.nav--dark .nav__logo { color: var(--hero-text); }
.nav--dark .nav__links a { color: var(--hero-muted); }
.nav--dark .nav__links a:hover, .nav--dark .nav__links a.active { color: var(--accent); }
.nav--dark .nav__mobile-toggle span { background: var(--hero-text); }

/* ============================================
   Hero — dark, editorial
   ============================================ */
.hero--dark {
  background: var(--hero-bg);
  color: var(--hero-text);
  padding: var(--space-2xl) 0;
  min-height: 85vh;
  display: flex;
  align-items: center;
}

.hero--dark h1 {
  font-weight: 300;
  max-width: 800px;
  margin-bottom: var(--space-md);
}

.hero--dark em {
  font-style: italic;
  font-weight: 300;
}

.hero--dark .hero__sub {
  font-size: 1.0625rem;
  color: var(--hero-muted);
  max-width: 480px;
  line-height: 1.7;
}

.hero__actions {
  margin-top: var(--space-lg);
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

/* Hero — light (inner pages) */
.hero--light {
  padding: var(--space-xl) 0 var(--space-lg);
}

.hero--light .eyebrow {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
  display: block;
}

.hero--light h1 {
  max-width: 600px;
  padding-bottom: var(--space-sm);
}
.hero--light h1::after {
  content: '';
  display: block;
  width: 48px;
  height: 1px;
  background: var(--accent);
  margin-top: var(--space-sm);
  opacity: 0.6;
}

.hero--light .hero__sub {
  font-size: 1.0625rem;
  color: var(--text-muted);
  max-width: 480px;
  line-height: 1.7;
  margin-top: var(--space-sm);
}

/* ============================================
   Buttons / Links
   ============================================ */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.9375rem 2.25rem;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn--white {
  background: var(--hero-text);
  color: var(--hero-bg);
}
.btn--white:hover {
  background: #FFFFFF;
  color: var(--hero-bg);
}

.btn--dark {
  background: var(--text);
  color: var(--bg);
}
.btn--dark:hover { background: var(--accent); color: #FFFFFF; opacity: 1; }

.btn--outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn--outline:hover { border-color: var(--text); }

.btn--ghost {
  background: transparent;
  color: var(--hero-muted);
  padding: 0;
  letter-spacing: 0.04em;
}
.btn--ghost:hover { color: var(--hero-text); }
.btn--ghost::after { content: ' →'; transition: margin-left 0.2s ease; }
.btn--ghost:hover::after { margin-left: 4px; }

.link-arrow {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: gap 0.25s ease;
}
.link-arrow:hover { gap: 0.75rem; }
.link-arrow::after { content: '→'; }

.link-arrow--muted { color: var(--text-muted); }
.link-arrow--muted:hover { color: var(--text); }

/* ============================================
   Sections
   ============================================ */
.section { padding: var(--space-xl) 0; }
.section--border { border-top: 1px solid var(--border-light); }

.eyebrow {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: var(--space-md);
  font-weight: 500;
}

/* ============================================
   Two-column layout
   ============================================ */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.split--wide-right { grid-template-columns: 5fr 7fr; }
.split--wide-left { grid-template-columns: 7fr 5fr; }

/* ============================================
   Service items (stacked, not cards)
   ============================================ */
.service-list { list-style: none; }

.service-item {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border-light);
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: var(--space-md);
  align-items: baseline;
  transition: padding-left 0.3s ease;
}

.service-item:first-child { border-top: 1px solid var(--border-light); }

.service-item:hover { padding-left: 0.5rem; }

.service-item__num {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  color: var(--accent);
  font-weight: 300;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.service-item:hover .service-item__num {
  transform: translateY(-2px);
  opacity: 0.5;
}

.service-item h3 { margin-bottom: 0.5rem; font-size: 1.375rem; }
.service-item p { color: var(--text-muted); font-size: 0.9375rem; line-height: 1.7; max-width: 540px; }

/* ============================================
   Blog list
   ============================================ */
.post-list { list-style: none; }

.post-item {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border-light);
  transition: padding-left 0.3s ease;
}

.post-item:first-child { padding-top: 0; }
.post-item:hover { padding-left: 0.5rem; }

.post-item__date {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.375rem;
  font-weight: 500;
}

.post-item h3 { margin-bottom: 0.5rem; }
.post-item h3 a { color: var(--text); transition: opacity 0.2s; }
.post-item h3 a:hover { opacity: 0.6; }
.post-item__excerpt { color: var(--text-muted); font-size: 0.9375rem; max-width: 540px; }

/* ============================================
   Blog post body
   ============================================ */
.post { padding: var(--space-xl) 0 var(--space-2xl); }
.post__date { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: var(--space-lg); font-weight: 500; }
.post__body { max-width: var(--max-narrow); }
.post__body p { margin-bottom: var(--space-sm); color: var(--text); }
.post__body h2 { margin-top: var(--space-lg); margin-bottom: var(--space-sm); font-size: 2rem; }

/* ============================================
   Bio (about page)
   ============================================ */
.bio {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.bio__photo {
  aspect-ratio: 3/4;
  background: var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.8125rem;
  position: sticky;
  top: 120px;
}

.bio__text p { color: var(--text-muted); margin-bottom: var(--space-sm); line-height: 1.75; }
.bio__text p:first-of-type {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: 300;
  line-height: 1.5;
  color: var(--text);
}

/* ============================================
   Contact form
   ============================================ */
.form { max-width: 440px; }
.form__group { margin-bottom: 1.5rem; }

.form__label {
  display: block;
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.form__input,
.form__textarea,
.form__select {
  width: 100%;
  padding: 0.875rem 0;
  border: none;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--text);
  background: transparent;
  outline: none;
  transition: border-color 0.3s ease;
  border-radius: 0;
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  border-bottom-color: var(--text);
}

.form__textarea { min-height: 120px; resize: vertical; }

.form__select {
  appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%2371706C' stroke-width='1.5'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0 center;
}

/* ============================================
   CTA band
   ============================================ */
.cta {
  background: var(--hero-bg);
  color: var(--hero-text);
  padding: var(--space-xl) 0;
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(244, 241, 236, 0.04) 0%, transparent 60%);
  pointer-events: none;
}

.cta h2 { margin-bottom: var(--space-xs); }
.cta p { color: var(--hero-muted); margin-bottom: var(--space-md); max-width: 420px; }

/* ============================================
   Footer
   ============================================ */
.footer { padding: var(--space-lg) 0 var(--space-md); }
.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-light);
}
.footer__copy { font-size: 0.75rem; color: var(--text-muted); }
.footer__links { list-style: none; display: flex; gap: 2rem; }
.footer__links a { font-size: 0.75rem; color: var(--text-muted); transition: color 0.25s; }
.footer__links a:hover { color: var(--text); }

/* ============================================
   Paper grain texture
   ============================================ */
.section,
.hero--light {
  background-image: url("data:image/svg+xml,%3Csvg width='200' height='200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
  .hero--dark { min-height: 70vh; padding: var(--space-xl) 0; }
  .split, .bio { grid-template-columns: 1fr; }
  .bio__photo { max-width: 220px; position: static; }
  .service-item { grid-template-columns: 2rem 1fr; }
  .nav__links { display: none; }
  .nav__mobile-toggle { display: block; }
  .nav__links.open {
    display: flex; flex-direction: column; position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--bg); padding: var(--space-sm) var(--space-md) var(--space-md);
    border-bottom: 1px solid var(--border-light); gap: var(--space-sm);
  }
  .nav--dark .nav__links.open { background: var(--hero-bg); }
  .footer .container { flex-direction: column; gap: var(--space-sm); text-align: center; }
  .hero__actions { flex-direction: column; align-items: flex-start; }
}