/* DirectEd — directed.pro
   Fonts: Plus Jakarta Sans (headings) + Inter (body) + JetBrains Mono (data)
   Palette: Deep navy + warm amber/orange accent on white */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Inter:wght@400;500;600&display=swap');

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

:root {
  --navy: #0f172a;
  --slate: #1e293b;
  --slate-mid: #334155;
  --slate-light: #64748b;
  --slate-lighter: #94a3b8;
  --amber: #d4650d;
  --amber-hover: #92400e;
  --amber-light: #d97706;
  --amber-bg: #fff7ed;
  --green: #16a34a;
  --white: #ffffff;
  --off-white: #f8fafc;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --font-heading: 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-width: 1120px;
  --max-text: 720px;
}

html { font-size: 16px; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-body); color: var(--slate-mid); line-height: 1.72; background: var(--white); }
img { max-width: 100%; display: block; }
a { color: var(--amber); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--amber-hover); }

/* ── Type Scale ── */
h1, h2, h3, h4, h5 { font-family: var(--font-heading); color: var(--navy); line-height: 1.2; font-weight: 700; }
h1 { font-size: 2.75rem; letter-spacing: -0.035em; }
h2 { font-size: 1.875rem; letter-spacing: -0.025em; margin-bottom: 1rem; }
h3 { font-size: 1.375rem; letter-spacing: -0.015em; }
h4 { font-size: 1.0625rem; font-weight: 600; }
p { margin-bottom: 1.125rem; }
p:last-child { margin-bottom: 0; }
strong { color: var(--navy); font-weight: 600; }
.mono { font-family: var(--font-mono); }

/* ── Layout ── */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 2rem; }
.narrow { max-width: var(--max-text); }
.section { padding: 4.5rem 0; }
.section--dark { background: linear-gradient(180deg, var(--navy) 0%, #0c1322 100%); color: #cbd5e1; }
.section--dark h2, .section--dark h3, .section--dark h4, .section--dark strong { color: var(--white); }
.section--dark a { color: var(--amber-light); }
.section--dark a:hover { color: var(--white); }
.section--alt { background: var(--off-white); }
.section--cream { background: var(--amber-bg); }

/* ── Nav ── */
.nav { background: var(--white); position: sticky; top: 0; z-index: 100; border-bottom: 2px solid var(--amber); box-shadow: 0 1px 3px rgba(0,0,0,0.06); }
.nav__inner { max-width: var(--max-width); margin: 0 auto; padding: 0 2rem; display: flex; align-items: center; justify-content: space-between; height: 64px; }
.nav__logo { display: flex; align-items: center; }
.nav__logo img { height: 38px; width: auto; }
.nav__links { display: flex; gap: 1.75rem; list-style: none; align-items: center; }
.nav__links a { color: var(--slate-mid); font-size: 0.8125rem; font-weight: 500; letter-spacing: 0.02em; transition: color 0.15s; }
.nav__links a:hover, .nav__links a.active { color: var(--navy); }
.nav__cta { background: var(--amber); color: var(--white) !important; padding: 0.5rem 1.25rem; border-radius: 5px; font-weight: 700; font-size: 0.8125rem; letter-spacing: 0.03em; transition: background 0.15s; }
.nav__cta:hover { background: var(--amber-hover); color: var(--white) !important; }
.nav__toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.nav__toggle span { display: block; width: 22px; height: 2px; background: var(--slate-mid); margin: 5px 0; }

/* ── Hero ── */
.hero {
  background: linear-gradient(170deg, var(--navy) 0%, #0c1322 100%);
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212,101,13,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero__content { max-width: 780px; position: relative; z-index: 1; }
.hero__accent {
  position: absolute;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 50%;
  pointer-events: none;
}
.hero__accent--1 { width: 300px; height: 300px; bottom: -100px; right: 5%; }
.hero__accent--2 { width: 180px; height: 180px; top: 20%; right: 15%; border-color: rgba(212,101,13,0.1); }
.hero__accent--3 { width: 80px; height: 80px; bottom: 30%; right: 35%; background: rgba(212,101,13,0.04); }
.hero__eyebrow { font-family: var(--font-mono); font-size: 0.75rem; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; color: var(--amber-light); margin-bottom: 1.25rem; }
.hero h1 { color: var(--white); margin-bottom: 1.5rem; font-size: 2.625rem; line-height: 1.15; }
.hero__sub { font-size: 1.0625rem; color: var(--slate-lighter); line-height: 1.7; margin-bottom: 0; max-width: 660px; }
.hero__cta { display: inline-block; background: var(--amber); color: var(--white); padding: 0.75rem 1.75rem; border-radius: 5px; font-family: var(--font-heading); font-weight: 600; font-size: 0.9375rem; transition: background 0.15s; }
.hero__cta:hover { background: var(--amber-hover); color: var(--white); }
.hero__note { margin-top: 1rem; font-size: 0.8125rem; color: #475569; }

/* ── Stats ── */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; padding: 2rem 0; }
.stat { text-align: center; padding: 1rem 0; }
.stat__number { font-family: var(--font-mono); font-size: 2.25rem; font-weight: 600; color: var(--amber); line-height: 1; margin-bottom: 0.5rem; }
.stat__label { font-size: 0.8125rem; color: var(--slate-light); line-height: 1.4; }

/* ── Cards ── */
.card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.card-grid--3 { grid-template-columns: repeat(3, 1fr); }
.card-grid--4 { grid-template-columns: repeat(4, 1fr); }
.card { background: var(--white); border: 1px solid var(--border); border-radius: 6px; padding: 1.75rem; transition: border-color 0.15s; }
.card:hover { border-color: #cbd5e1; }
.card--accent { border-left: 3px solid var(--amber); }
.card--dark { background: rgba(255,255,255,0.07); border-color: rgba(255,255,255,0.12); }
.card--dark:hover { border-color: rgba(255,255,255,0.22); }
.card__tag { font-family: var(--font-mono); font-size: 0.6875rem; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; color: var(--amber); margin-bottom: 0.625rem; }
.card--dark .card__tag { color: var(--amber-light); }
.card h3, .card h4 { margin-bottom: 0.5rem; }
.card--dark h3, .card--dark h4 { color: var(--white); }
.card p { font-size: 0.9375rem; color: var(--slate-light); line-height: 1.6; }
.card--dark p { color: #c8d2de; }

/* ── Evidence Table ── */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.evidence-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; margin: 1.5rem 0; }
.evidence-table th { text-align: left; font-family: var(--font-mono); font-weight: 500; color: var(--slate-light); padding: 0.625rem 1rem; border-bottom: 2px solid var(--border); font-size: 0.6875rem; letter-spacing: 0.06em; text-transform: uppercase; }
.evidence-table td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--border-light); vertical-align: top; }
.evidence-table tr:last-child td { border-bottom: none; }
.evidence-table tr:hover td { background: var(--off-white); }
.evidence-table .num { font-family: var(--font-mono); color: var(--amber); font-weight: 600; white-space: nowrap; }
.evidence-table .pos { font-family: var(--font-mono); color: var(--green); font-weight: 600; white-space: nowrap; }
.evidence-table .src { color: var(--slate-light); font-size: 0.8125rem; }
.section--dark .evidence-table th { color: var(--slate-lighter); border-bottom-color: rgba(255,255,255,0.1); }
.section--dark .evidence-table td { border-bottom-color: rgba(255,255,255,0.04); color: #cbd5e1; }
.section--dark .evidence-table tr:hover td { background: rgba(255,255,255,0.02); }

/* ── Steps / Phases ── */
.phase { display: flex; gap: 2rem; padding: 2rem 0; border-bottom: 1px solid var(--border); }
.phase:last-child { border-bottom: none; }
.phase__marker { flex-shrink: 0; width: 40px; height: 40px; background: var(--amber-bg); border: 1.5px solid var(--amber); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: var(--font-mono); font-weight: 600; color: var(--amber); font-size: 0.875rem; }
.phase__content h3 { margin-bottom: 0.375rem; }
.phase__content p { font-size: 0.9375rem; }
.section--dark .phase { border-bottom-color: rgba(255,255,255,0.08); }
.section--dark .phase__marker { background: rgba(217,119,6,0.1); border-color: var(--amber-light); color: var(--amber-light); }

/* ── Credentials ── */
.credential-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 3rem; }
.credential { padding: 1.125rem 0; border-bottom: 1px solid var(--border); }
.credential__org { font-family: var(--font-heading); font-weight: 700; color: var(--navy); font-size: 0.9375rem; margin-bottom: 0.125rem; }
.credential__detail { font-size: 0.8125rem; color: var(--slate-light); line-height: 1.5; }

/* ── Pull Quotes ── */
.pullquote { background: var(--amber-bg); border-left: 3px solid var(--amber); padding: 1.5rem 2rem; border-radius: 0 6px 6px 0; margin: 2rem 0; font-size: 1.0625rem; font-family: var(--font-heading); font-weight: 500; color: var(--navy); line-height: 1.5; }
.section--dark .pullquote { background: rgba(217,119,6,0.08); border-left-color: var(--amber-light); color: var(--white); }

/* ── Highlight Box ── */
.highlight-box { background: var(--amber-bg); border-left: 3px solid var(--amber); padding: 1.25rem 1.75rem; border-radius: 0 6px 6px 0; margin: 1.5rem 0; }
.highlight-box p { font-size: 0.9375rem; margin: 0; }

/* ── Comparison ── */
.comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin: 2rem 0; }
.comparison__side { padding: 1.75rem; border-radius: 6px; }
.comparison__side--dim { background: var(--off-white); border: 1px solid var(--border); }
.comparison__side--bright { background: var(--amber-bg); border: 1px solid #f0c891; }
.comparison__label { font-family: var(--font-mono); font-weight: 600; font-size: 0.6875rem; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 0.625rem; }
.comparison__side--dim .comparison__label { color: var(--slate-light); }
.comparison__side--bright .comparison__label { color: var(--amber); }
.comparison__side p { font-size: 0.9375rem; }

/* ── Section Headings ── */
.section__eyebrow { font-family: var(--font-mono); font-size: 0.6875rem; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--amber); margin-bottom: 0.625rem; }
.section__intro { font-size: 1.0625rem; color: var(--slate-light); max-width: 640px; margin-bottom: 2.5rem; line-height: 1.7; }

/* ── CTA Block ── */
.cta-block { text-align: center; padding: 3.5rem 2rem; background: linear-gradient(170deg, var(--navy) 0%, #0c1322 100%); border-radius: 10px; }
.cta-block h2 { color: var(--white); margin-bottom: 0.75rem; }
.cta-block p { color: var(--slate-lighter); font-size: 1rem; margin-bottom: 1.75rem; max-width: 520px; margin-left: auto; margin-right: auto; }

/* ── Page Header ── */
.page-header { background: linear-gradient(170deg, var(--navy) 0%, #0c1322 100%); padding: 3.5rem 0 2.75rem; position: relative; overflow: hidden; }
.page-header::before { content: ''; position: absolute; inset: 0; background-image: radial-gradient(circle, rgba(255,255,255,0.04) 1px, transparent 1px); background-size: 24px 24px; pointer-events: none; }
.page-header::after { content: ''; position: absolute; top: -30%; right: -15%; width: 400px; height: 400px; border-radius: 50%; background: radial-gradient(circle, rgba(212,101,13,0.06) 0%, transparent 70%); pointer-events: none; }
.page-header h1 { color: var(--white); font-size: 2.25rem; margin-bottom: 0.875rem; }
.page-header p { color: var(--slate-lighter); font-size: 1.0625rem; max-width: 580px; line-height: 1.6; }

/* ── Evidence Hierarchy ── */
.evidence-tier { padding: 1.5rem 0; border-bottom: 1px solid var(--border); }
.evidence-tier:last-child { border-bottom: none; }
.evidence-tier__label { font-family: var(--font-mono); font-size: 0.6875rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 0.5rem; }
.evidence-tier__label--established { color: var(--green); }
.evidence-tier__label--synthesized { color: var(--amber); }
.evidence-tier__label--hypothesized { color: var(--slate-light); }
.evidence-tier ul { list-style: none; padding: 0; }
.evidence-tier li { font-size: 0.9375rem; padding: 0.25rem 0; padding-left: 1rem; position: relative; }
.evidence-tier li::before { content: ''; position: absolute; left: 0; top: 0.65rem; width: 4px; height: 4px; border-radius: 50%; }
.evidence-tier--established li::before { background: var(--green); }
.evidence-tier--synthesized li::before { background: var(--amber); }
.evidence-tier--hypothesized li::before { background: var(--slate-light); }

/* ── Inline Data Callout ── */
.data-callout { display: inline-block; font-family: var(--font-mono); font-weight: 600; color: var(--amber); background: var(--amber-bg); padding: 0.125rem 0.5rem; border-radius: 3px; font-size: 0.875rem; }

/* ── Responsive ── */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  .hero { padding: 3.5rem 0 3rem; }
  .hero h1 { font-size: 2rem; }
  .hero__sub { font-size: 1rem; }
  .stats { grid-template-columns: 1fr; gap: 1rem; }
  .research-stats { grid-template-columns: 1fr !important; }
  .card-grid, .card-grid--3, .card-grid--4 { grid-template-columns: 1fr; }
  .credential-grid { grid-template-columns: 1fr; }
  .comparison { grid-template-columns: 1fr; }
  .phase { flex-direction: column; gap: 0.75rem; }
  .nav__links { display: none; }
  .nav__toggle { display: block; }
  .nav__links.open { display: flex; flex-direction: column; position: absolute; top: 66px; left: 0; right: 0; background: var(--white); padding: 1rem 2rem 1.25rem; gap: 0.75rem; border-bottom: 2px solid var(--amber); box-shadow: 0 4px 6px rgba(0,0,0,0.06); }
  .contact-grid { grid-template-columns: 1fr !important; }
  footer .container > div:first-child { grid-template-columns: 1fr 1fr !important; gap: 1.5rem !important; }
  .evidence-table { font-size: 0.8125rem; }
  .evidence-table th, .evidence-table td { padding: 0.5rem 0.625rem; }
  .footer__inner { flex-direction: column; gap: 1.25rem; text-align: center; }
  .footer__links { flex-wrap: wrap; justify-content: center; }
  .container { padding: 0 1.25rem; }
  .section { padding: 3rem 0; }
  .pullquote { font-size: 1rem; padding: 1.25rem 1.5rem; }
  .page-header { padding: 2.5rem 0 2rem; }
  .page-header h1 { font-size: 1.875rem; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 1.75rem; }
  .stat__number { font-size: 1.75rem; }
}