/* ===========================================================
   The Research School — stylesheet
   =========================================================== */

:root {
  --navy: #0f2340;
  --navy-deep: #0a1830;
  --navy-soft: #14335e;
  --gold: #c9a24b;
  --gold-soft: #e6d3a3;
  --ink: #1c2430;
  --slate: #5a6472;
  --line: #e4e8ee;
  --bg: #ffffff;
  --bg-alt: #f6f8fb;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(15, 35, 64, 0.08);
  --shadow-sm: 0 4px 14px rgba(15, 35, 64, 0.06);
  --max: 1180px;
  --serif: "Lora", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  color: var(--navy);
  line-height: 1.2;
  margin: 0 0 16px;
  font-weight: 600;
}

h1 { font-size: clamp(2.1rem, 4vw, 3.1rem); }
h2 { font-size: clamp(1.6rem, 2.6vw, 2.2rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 16px; color: var(--slate); }

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 700;
  margin-bottom: 14px;
}

.section {
  padding: 88px 0;
}
.section-alt { background: var(--bg-alt); }
.section-navy {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: var(--white);
}
.section-navy h2, .section-navy h3 { color: var(--white); }
.section-navy p { color: rgba(255,255,255,0.78); }

.section-head {
  max-width: 680px;
  margin: 0 0 48px;
}
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.btn-primary {
  background: var(--gold);
  color: var(--navy-deep);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 24px rgba(201, 162, 75, 0.35); }
.btn-outline {
  background: transparent;
  border-color: rgba(255,255,255,0.5);
  color: var(--white);
}
.btn-outline:hover { background: rgba(255,255,255,0.1); transform: translateY(-2px); }
.btn-dark {
  background: var(--navy);
  color: var(--white);
}
.btn-dark:hover { background: var(--navy-soft); transform: translateY(-2px); }
.btn-block { width: 100%; justify-content: center; }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--navy);
}
.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-soft) 100%);
  color: var(--gold-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}
.brand-text .sub { display: block; font-family: var(--sans); font-weight: 500; font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--slate); margin-top: 2px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--ink);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--navy); border-color: var(--gold); }

.nav-cta { display: flex; align-items: center; gap: 18px; }
.nav-cta .btn { padding: 11px 22px; font-size: 0.88rem; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--navy); border-radius: 2px; }

/* ---------- hero ---------- */
.hero {
  background: linear-gradient(165deg, var(--navy) 0%, var(--navy-deep) 70%);
  color: var(--white);
  padding: 96px 0 100px;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -120px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201,162,75,0.18) 0%, rgba(201,162,75,0) 70%);
}
.hero-inner { max-width: 760px; position: relative; }
.hero h1 { color: var(--white); margin-bottom: 20px; }
.hero .lead { color: rgba(255,255,255,0.82); font-size: 1.15rem; max-width: 620px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 32px; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 64px;
  max-width: 640px;
  position: relative;
}
.hero-stats div strong { display: block; font-family: var(--serif); font-size: 1.8rem; color: var(--gold-soft); }
.hero-stats div span { font-size: 0.82rem; color: rgba(255,255,255,0.7); }

/* ---------- pillars / cards ---------- */
.pillars {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.pillar-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.pillar-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.pillar-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: var(--bg-alt);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  color: var(--navy);
}
.pillar-card ul { margin: 20px 0 28px; padding: 0; list-style: none; }
.pillar-card li {
  padding: 10px 0;
  border-top: 1px solid var(--line);
  font-size: 0.95rem;
  color: var(--ink);
  display: flex;
  gap: 10px;
}
.pillar-card li:first-child { border-top: none; }
.pillar-card li .dot { color: var(--gold); flex-shrink: 0; }

/* ---------- service grid (detail pages) ---------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.service-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
}
.service-card .num {
  font-family: var(--serif);
  color: var(--gold);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.service-card h3 { margin-top: 10px; }

/* ---------- process steps ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 28px 22px 22px;
  background: var(--bg-alt);
  border-radius: var(--radius);
}
.step::before {
  counter-increment: step;
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--gold-soft);
  font-family: var(--serif);
  font-weight: 700;
  margin-bottom: 14px;
}
.step h3 { font-size: 1.05rem; margin-bottom: 8px; }
.step p { font-size: 0.92rem; margin-bottom: 0; }

/* ---------- about page ---------- */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.value-card {
  padding: 30px 26px;
  border-left: 3px solid var(--gold);
  background: var(--bg-alt);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.audience-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 20px;
}
.audience-row div {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 22px;
  text-align: center;
}
.audience-row .icon { font-size: 1.6rem; margin-bottom: 10px; }

/* ---------- CTA band ---------- */
.cta-band {
  border-radius: 20px;
  padding: 56px;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-soft) 100%);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.cta-band h2 { color: var(--white); margin-bottom: 8px; }
.cta-band p { color: rgba(255,255,255,0.78); margin-bottom: 0; max-width: 480px; }

/* ---------- contact ---------- */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.contact-info-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}
.contact-info-card .row {
  display: flex;
  gap: 14px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}
.contact-info-card .row:first-child { border-top: none; padding-top: 0; }
.contact-info-card .row strong { display: block; color: var(--navy); font-size: 0.9rem; }
.contact-info-card .row span, .contact-info-card .row a { font-size: 0.92rem; color: var(--slate); }

.form-field { margin-bottom: 18px; }
.form-field label { display: block; font-size: 0.86rem; font-weight: 600; color: var(--navy); margin-bottom: 6px; }
.form-field input, .form-field select, .form-field textarea {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--white);
}
.form-field textarea { resize: vertical; min-height: 120px; }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201,162,75,0.18);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-note { font-size: 0.82rem; color: var(--slate); margin-top: 10px; }
.form-success {
  display: none;
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 10px;
  background: #e9f5ec;
  color: #1c6b34;
  font-size: 0.9rem;
}
.form-success.show { display: block; }

/* ---------- footer ---------- */
.site-footer {
  background: var(--navy-deep);
  color: rgba(255,255,255,0.75);
  padding: 64px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-grid h4 {
  color: var(--white);
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 12px; font-size: 0.92rem; }
.footer-grid a:hover { color: var(--gold-soft); }
.footer-brand p { color: rgba(255,255,255,0.65); font-size: 0.92rem; max-width: 320px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 26px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.55);
}

/* ---------- utility ---------- */
.mt-0 { margin-top: 0; }
.text-center { text-align: center; }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .nav-links, .nav-cta .btn-outline-desktop { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 20px 24px 28px;
    gap: 18px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
  }
  .pillars, .steps, .value-grid, .audience-row, .footer-grid, .contact-wrap { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); }
  .cta-band { flex-direction: column; align-items: flex-start; }
  .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .hero { padding: 72px 0 76px; }
  .hero-stats { grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
  .hero-stats div strong { font-size: 1.3rem; }
}