/* ── Reset & Base ─────────────────────────────────────── */

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

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

:root {
  --bg: #fcfcfa;
  --text: #1a1a1a;
  --text-secondary: #3a3a3a;
  --text-muted: #5a5a5a;
  --text-faint: #999;
  --accent: #5a9199;
  --accent-hover: #4a7f86;
  --accent-number: #6ba3aa;
  --card-bg: #f5f4f0;
  --card-text: #4a4a4a;
  --nav-bg: rgba(252, 252, 250, 0.85);
  --border: rgba(26, 26, 26, 0.06);
  --divider: rgba(26, 26, 26, 0.08);
  --btn-bg: #1a1a1a;
  --btn-text: #fcfcfa;
  --btn-hover: #333;
  --btn-border: #1a1a1a;
}

[data-theme="dark"] {
  --bg: #141414;
  --text: #e8e8e6;
  --text-secondary: #c0c0be;
  --text-muted: #9a9a98;
  --text-faint: #666;
  --accent: #7dbac2;
  --accent-hover: #9ad0d7;
  --accent-number: #7dbac2;
  --card-bg: #1e1e1e;
  --card-text: #b0b0ae;
  --nav-bg: rgba(20, 20, 20, 0.85);
  --border: rgba(255, 255, 255, 0.06);
  --divider: rgba(255, 255, 255, 0.08);
  --btn-bg: #e8e8e6;
  --btn-text: #141414;
  --btn-hover: #d0d0ce;
  --btn-border: #e8e8e6;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background-color: var(--bg);
  line-height: 1.7;
  font-size: 17px;
}

/* ── Typography ──────────────────────────────────────── */

h1, h2, h3 {
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 3rem;
  font-weight: 700;
}

h2 {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

p {
  color: var(--text-secondary);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-hover);
}

/* ── Layout ──────────────────────────────────────────── */

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 5rem 0;
}

/* ── Nav ─────────────────────────────────────────────── */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text);
}

.nav-brand img {
  width: 28px;
  height: 28px;
}

.nav-brand span {
  font-weight: 600;
  font-size: 1.05rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.theme-toggle {
  background: none;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  padding: 0.35rem 0.5rem;
  font-size: 1rem;
  line-height: 1;
  color: var(--text-muted);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.theme-toggle:hover {
  border-color: var(--text-muted);
  color: var(--text);
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 450;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--text);
}

/* ── Hero ────────────────────────────────────────────── */

.hero {
  padding: 10rem 0 6rem;
  text-align: center;
}

.hero-logo {
  width: 100px;
  height: 100px;
  margin-bottom: 2rem;
}

.hero h1 {
  margin-bottom: 1.25rem;
}

.hero .tagline {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 2.5rem;
  line-height: 1.6;
}

.hero .cta {
  display: inline-block;
  padding: 0.75rem 2rem;
  background: var(--btn-bg);
  color: var(--btn-text);
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: background 0.2s ease, transform 0.15s ease;
}

.hero .cta:hover {
  background: var(--btn-hover);
  color: var(--btn-text);
  transform: translateY(-1px);
}

/* ── Divider ─────────────────────────────────────────── */

.divider {
  border: none;
  height: 1px;
  background: var(--divider);
  max-width: 720px;
  margin: 0 auto;
}

/* ── Approach ────────────────────────────────────────── */

.approach {
  padding: 5rem 0;
  text-align: center;
}

.approach .section-intro {
  max-width: 520px;
  margin: 0 auto 3rem;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.approach-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.approach-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 2rem;
}

.approach-card .card-number {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-number);
  margin-bottom: 0.75rem;
  letter-spacing: 0.04em;
}

.approach-card h3 {
  color: var(--text);
}

.approach-card p {
  color: var(--card-text);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ── About ───────────────────────────────────────────── */

.about {
  padding: 5rem 0;
  text-align: center;
}

.about-content {
  max-width: 600px;
  margin: 0 auto;
}

.about-content p {
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
}

.about-content p:last-child {
  margin-bottom: 0;
}

/* ── Contact ─────────────────────────────────────────── */

.contact {
  padding: 5rem 0 6rem;
  text-align: center;
}

.contact p {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 440px;
  margin-left: auto;
  margin-right: auto;
}

.contact .email-link {
  display: inline-block;
  padding: 0.75rem 2rem;
  border: 1.5px solid var(--btn-border);
  border-radius: 10px;
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

.contact .email-link:hover {
  background: var(--btn-bg);
  color: var(--btn-text);
}

/* ── Footer ──────────────────────────────────────────── */

footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

footer .container {
  text-align: center;
}

footer p {
  font-size: 0.85rem;
  color: var(--text-faint);
}

/* ── Policy Pages ────────────────────────────────────── */

.policy {
  padding: 8rem 0 4rem;
}

.policy h1 {
  font-size: 2.25rem;
  margin-bottom: 0.5rem;
}

.policy .last-updated {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 3rem;
}

.policy h2 {
  font-size: 1.35rem;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

.policy h3 {
  font-size: 1.05rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.policy p {
  margin-bottom: 1rem;
  font-size: 1rem;
  line-height: 1.75;
}

.policy ul, .policy ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.policy li {
  margin-bottom: 0.4rem;
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text-secondary);
}

.policy a {
  color: var(--accent);
}

.policy a:hover {
  color: var(--accent-hover);
}

/* ── Footer Links ────────────────────────────────────── */

.footer-links {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--text-faint);
  font-size: 0.85rem;
  margin: 0 0.75rem;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--text-muted);
}

/* ── Responsive ──────────────────────────────────────── */

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  h1 {
    font-size: 2.25rem;
  }

  h2 {
    font-size: 1.65rem;
  }

  .hero {
    padding: 8rem 0 4rem;
  }

  .hero-logo {
    width: 80px;
    height: 80px;
  }

  .hero .tagline {
    font-size: 1.1rem;
  }

  section {
    padding: 3.5rem 0;
  }

  .nav-links {
    gap: 1.25rem;
  }

  .approach-card {
    padding: 1.5rem;
  }
}