:root {
  --ink: #111827;
  --ink-light: #4b5563;
  --ink-lighter: #9ca3af;
  --surface: #ffffff;
  --surface-alt: #f9fafb;
  --surface-dark: #0a0e17;
  --accent: #dc2626;
  --accent-hover: #b91c1c;
  --accent-subtle: #fef2f2;
  --border: #e5e7eb;
  --border-light: #f3f4f6;
  --radius: 8px;
  --radius-lg: 14px;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-lg: 0 4px 12px rgba(0,0,0,.06);
  --transition: 180ms ease;
  --max-w: 1080px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--ink);
  background: var(--surface);
  line-height: 1.6;
  font-size: 16px;
}
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font: inherit; border: none; background: none; }
ul { list-style: none; }
input, textarea { font: inherit; }
h1, h2, h3, h4 { line-height: 1.2; font-weight: 600; letter-spacing: -.02em; }
h1 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.1rem; }
p { color: var(--ink-light); }
img { max-width: 100%; display: block; }

.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius);
  font-weight: 500; font-size: .9rem; transition: all var(--transition);
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-outline { border: 1.5px solid var(--border); color: var(--ink); }
.btn-outline:hover { border-color: var(--ink-lighter); background: var(--surface-alt); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #1f2937; }

/* nav */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,.95); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border); padding: 0 24px;
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; height: 64px;
}
.nav-logo {
  font-size: 1.2rem; font-weight: 700; letter-spacing: -.02em;
  display: flex; align-items: center; gap: 8px;
}
.nav-logo-mark {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent); color: #fff; font-weight: 700;
  font-style: normal; font-size: .7rem; letter-spacing: .02em;
  width: 28px; height: 28px; border-radius: 6px; flex-shrink: 0;
}
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { font-size: .875rem; font-weight: 450; color: var(--ink-light); transition: color var(--transition); }
.nav-links a:hover { color: var(--ink); }
.nav-cta .btn { padding: 8px 18px; font-size: .84rem; }

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
}

/* hero */
.hero {
  padding: 120px 24px 80px;
  border-bottom: 1px solid var(--border);
}
.hero-inner { max-width: var(--max-w); margin: 0 auto; }
.hero-eyebrow {
  display: inline-block; font-size: .78rem; font-weight: 600;
  color: var(--accent); text-transform: uppercase; letter-spacing: .08em;
  margin-bottom: 16px;
}
.hero h1 { max-width: 640px; margin-bottom: 18px; }
.hero-sub { font-size: 1.1rem; max-width: 520px; line-height: 1.7; margin-bottom: 36px; }
.hero-form { display: flex; gap: 10px; max-width: 440px; }
.hero-form input {
  flex: 1; padding: 12px 16px; border: 1.5px solid var(--border);
  border-radius: var(--radius); font-size: .9rem; outline: none;
  transition: border-color var(--transition);
}
.hero-form input:focus { border-color: var(--accent); }
.hero-note { font-size: .78rem; color: var(--ink-lighter); margin-top: 10px; }

/* topics */
.topics { padding: 72px 24px; background: var(--surface-alt); }
.topics-inner { max-width: var(--max-w); margin: 0 auto; }
.topics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 36px; }
.topic-card {
  padding: 24px 20px; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); transition: all var(--transition);
}
.topic-card:hover { border-color: var(--accent); }
.topic-icon { font-size: 1.4rem; margin-bottom: 12px; }
.topic-card h3 { font-size: .95rem; margin-bottom: 6px; }
.topic-card p { font-size: .82rem; line-height: 1.6; }

@media (max-width: 768px) { .topics-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .topics-grid { grid-template-columns: 1fr; } }

/* why section */
.why { padding: 80px 24px; }
.why-inner { max-width: var(--max-w); margin: 0 auto; }
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-top: 40px; }
.why-item h3 { margin-bottom: 8px; font-size: 1rem; }
.why-item p { font-size: .88rem; line-height: 1.7; }
.why-num {
  font-size: .75rem; font-weight: 700; color: var(--accent);
  margin-bottom: 14px; font-variant-numeric: tabular-nums;
}

@media (max-width: 768px) { .why-grid { grid-template-columns: 1fr; } }

/* subscribe cta */
.subscribe {
  padding: 80px 24px; background: var(--surface-dark); text-align: center;
}
.subscribe-inner { max-width: 560px; margin: 0 auto; }
.subscribe h2 { color: #fff; margin-bottom: 14px; }
.subscribe p { color: rgba(255,255,255,.5); margin-bottom: 32px; font-size: 1.05rem; }
.subscribe-form { display: flex; gap: 10px; max-width: 420px; margin: 0 auto; }
.subscribe-form input {
  flex: 1; padding: 12px 16px; border: 1.5px solid rgba(255,255,255,.12);
  border-radius: var(--radius); font-size: .9rem; outline: none;
  background: rgba(255,255,255,.06); color: #fff;
}
.subscribe-form input::placeholder { color: rgba(255,255,255,.3); }
.subscribe-form input:focus { border-color: var(--accent); }
.subscribe-note { font-size: .78rem; color: rgba(255,255,255,.3); margin-top: 12px; }

/* contact */
.contact { padding: 80px 24px; }
.contact-inner {
  max-width: var(--max-w); margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px;
}
.contact-text h2 { margin-bottom: 14px; }
.contact-text > p { margin-bottom: 28px; font-size: 1rem; }
.contact-info { display: flex; flex-direction: column; gap: 18px; }
.contact-info-item { display: flex; gap: 12px; align-items: flex-start; }
.contact-info-icon {
  width: 34px; height: 34px; background: var(--accent-subtle);
  border-radius: var(--radius); display: flex; align-items: center;
  justify-content: center; flex-shrink: 0; color: var(--accent); font-size: .85rem;
}
.contact-info-item strong { display: block; font-size: .86rem; margin-bottom: 2px; }
.contact-info-item p { font-size: .82rem; margin: 0; }
.contact-form {
  background: var(--surface-alt); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px; box-shadow: var(--shadow);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: .8rem; font-weight: 500; margin-bottom: 5px; }
.form-group input, .form-group textarea {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border);
  border-radius: var(--radius); font-size: .88rem; outline: none;
  transition: border-color var(--transition); background: var(--surface);
}
.form-group input:focus, .form-group textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px rgba(220,38,38,.06);
}
.form-group textarea { resize: vertical; min-height: 80px; }
.form-check { display: flex; align-items: flex-start; gap: 8px; margin-bottom: 18px; }
.form-check input[type="checkbox"] { width: 15px; height: 15px; margin-top: 2px; accent-color: var(--accent); }
.form-check label { font-size: .8rem; color: var(--ink-light); line-height: 1.5; }
.form-submit { width: 100%; }
.form-success { display: none; text-align: center; padding: 28px 16px; }
.form-success.show { display: block; }
.form-success h3 { margin-bottom: 6px; }
.form-success p { font-size: .88rem; }

@media (max-width: 768px) {
  .contact-inner { grid-template-columns: 1fr; gap: 40px; }
  .form-row { grid-template-columns: 1fr; }
  .hero-form, .subscribe-form { flex-direction: column; }
}

/* footer */
.footer { padding: 56px 24px 28px; background: var(--surface-dark); color: rgba(255,255,255,.5); }
.footer-inner { max-width: var(--max-w); margin: 0 auto; }
.footer-top {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.06);
}
.footer-brand p { color: rgba(255,255,255,.35); font-size: .86rem; line-height: 1.7; margin-top: 12px; max-width: 260px; }
.footer-col h4 {
  color: rgba(255,255,255,.7); font-size: .76rem;
  text-transform: uppercase; letter-spacing: .08em; margin-bottom: 16px; font-weight: 600;
}
.footer-col a { display: block; font-size: .86rem; color: rgba(255,255,255,.4); padding: 4px 0; transition: color var(--transition); }
.footer-col a:hover { color: rgba(255,255,255,.8); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 24px; font-size: .78rem;
}
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a:hover { color: rgba(255,255,255,.7); }

@media (max-width: 768px) {
  .footer-top { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-brand { grid-column: span 2; }
  .footer-bottom { flex-direction: column; gap: 10px; }
}

/* legal pages */
.legal-page { padding: 120px 24px 80px; }
.legal-inner { max-width: 700px; margin: 0 auto; }
.legal-inner h1 { font-size: clamp(1.7rem, 4vw, 2.2rem); margin-bottom: 8px; }
.legal-updated { font-size: .84rem; color: var(--ink-lighter); margin-bottom: 44px; padding-bottom: 28px; border-bottom: 1px solid var(--border); }
.legal-inner h2 { font-size: 1.15rem; margin-top: 36px; margin-bottom: 12px; }
.legal-inner p { margin-bottom: 14px; font-size: .92rem; line-height: 1.75; }
.legal-inner ul { margin-bottom: 14px; padding-left: 20px; }
.legal-inner li { list-style: disc; font-size: .92rem; line-height: 1.75; color: var(--ink-light); margin-bottom: 5px; }
.legal-inner a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }

/* about page */
.page-hero { padding: 120px 24px 64px; background: var(--surface-alt); }
.page-hero-inner { max-width: var(--max-w); margin: 0 auto; }
.page-hero p { max-width: 560px; font-size: 1.05rem; margin-top: 14px; }
.page-section { padding: 72px 24px; }
.page-inner { max-width: var(--max-w); margin: 0 auto; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; margin-top: 40px; }
.two-col h3 { margin-bottom: 10px; }
.two-col p { font-size: .92rem; line-height: 1.75; margin-bottom: 14px; }
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 40px; }
.team-card { text-align: center; }
.team-avatar {
  width: 64px; height: 64px; background: var(--accent-subtle);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  margin: 0 auto 14px; font-weight: 700; color: var(--accent); font-size: 1rem;
}
.team-card h3 { font-size: .95rem; margin-bottom: 3px; }
.team-card p { font-size: .82rem; }

@media (max-width: 768px) {
  .two-col { grid-template-columns: 1fr; gap: 28px; }
  .team-grid { grid-template-columns: 1fr; }
}

/* fade */
.fade-in { opacity: 0; transform: translateY(16px); transition: opacity .45s ease, transform .45s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

.section-label {
  font-size: .76rem; text-transform: uppercase; letter-spacing: .1em;
  color: var(--accent); font-weight: 600; margin-bottom: 10px;
}