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

/* ── Color Themes (Light Mode) ── */
:root,
[data-theme="ocean"] {
  --bg:           #f5f7fa;
  --bg-card:      #ffffff;
  --text:         #1a2332;
  --text-dim:     #5a6a7e;
  --accent:       #3b82f6;
  --accent-hover: #2563eb;
  --border:       #e2e8f0;
  --input-bg:     #f1f5f9;
}

[data-theme="sunset"] {
  --bg:           #fdf8f5;
  --bg-card:      #ffffff;
  --text:         #2d1f1a;
  --text-dim:     #8a6e5e;
  --accent:       #e07840;
  --accent-hover: #c4642e;
  --border:       #f0ddd5;
  --input-bg:     #faf3ef;
}

[data-theme="forest"] {
  --bg:           #f3faf5;
  --bg-card:      #ffffff;
  --text:         #1a2d1e;
  --text-dim:     #5a7e64;
  --accent:       #22c55e;
  --accent-hover: #16a34a;
  --border:       #d5ead8;
  --input-bg:     #eef7f0;
}

[data-theme="midnight"] {
  --bg:           #f5f5fb;
  --bg-card:      #ffffff;
  --text:         #1a1a2e;
  --text-dim:     #6e6e9a;
  --accent:       #7c6ff7;
  --accent-hover: #6358d4;
  --border:       #e0e0f0;
  --input-bg:     #f0f0f8;
}

[data-theme="lavender"] {
  --bg:           #f9f5fc;
  --bg-card:      #ffffff;
  --text:         #2a1e30;
  --text-dim:     #8a70a0;
  --accent:       #a855f7;
  --accent-hover: #9333ea;
  --border:       #e8daf0;
  --input-bg:     #f5eef8;
}

/* ── Base ── */
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent-hover); }

/* ── Accent top bar ── */
body::before {
  content: "";
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  flex-shrink: 0;
}

/* ── Header / Nav ── */
header {
  background: var(--bg-card);
  box-shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.nav-brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: -.01em;
}
.nav-links { display: flex; gap: 0.25rem; align-items: center; list-style: none; }
.nav-links a {
  color: var(--text-dim);
  font-size: .9rem;
  padding: 6px 14px;
  border-radius: 100px;
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--text); background: var(--bg); }
.nav-links a.active { color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); }

/* Hamburger */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-dim);
  border-radius: 2px;
  transition: .3s;
}

/* ── Main content ── */
main {
  flex: 1;
  max-width: 880px;
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

/* ── Hero (index) ── */
.hero {
  padding: 3.5rem 0 2.5rem;
}
.hero h1 {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.02em;
  margin-bottom: 1rem;
}
.hero h1 .accent {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--accent) 30%, transparent);
  text-underline-offset: 4px;
  text-decoration-thickness: 3px;
}
.hero > p {
  color: var(--text-dim);
  font-size: 1.1rem;
  max-width: 520px;
  margin-bottom: 2rem;
}
.hero-links { display: flex; gap: .75rem; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 11px 26px;
  border-radius: 100px;
  font-weight: 600;
  font-size: .9rem;
  transition: background .2s, transform .1s, box-shadow .2s;
  cursor: pointer;
}
.btn:active { transform: scale(.97); }
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 25%, transparent);
}
.btn-primary:hover { background: var(--accent-hover); color: #fff; }
.btn-secondary {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* Page links */
.page-links {
  margin-top: 2.5rem;
  border-top: 1px solid var(--border);
}
.page-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 0.5rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  transition: padding-left .2s, background .2s;
}
.page-link:hover {
  padding-left: 1rem;
  background: var(--bg-card);
  color: var(--text);
}
.page-link-label {
  font-weight: 700;
  font-size: 1.05rem;
  min-width: 150px;
  flex-shrink: 0;
}
.page-link:hover .page-link-label { color: var(--accent); }
.page-link-desc {
  color: var(--text-dim);
  font-size: .9rem;
  flex: 1;
}
.page-link-arrow {
  font-size: 1.3rem;
  color: var(--text-dim);
  transition: transform .2s, color .2s;
  flex-shrink: 0;
}
.page-link:hover .page-link-arrow {
  transform: translateX(4px);
  color: var(--accent);
}

/* ── Legal pages ── */
.legal h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: .25rem;
}
.legal .last-updated {
  color: var(--text-dim);
  margin-bottom: 2.5rem;
  font-size: .85rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.legal h2 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-top: 2.25rem;
  margin-bottom: .6rem;
  color: var(--text);
}
.legal h2::before {
  display: inline-block;
  width: 4px;
  height: 1em;
  background: var(--accent);
  border-radius: 2px;
  margin-right: .6rem;
  vertical-align: middle;
  content: "";
}
.legal h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 1.25rem;
  margin-bottom: .4rem;
  color: var(--text);
}
.legal p,
.legal li {
  color: var(--text-dim);
  margin-bottom: .6rem;
  font-size: .92rem;
}
.legal ul {
  padding-left: 1.5rem;
  margin-bottom: .75rem;
}
.legal .disclaimer {
  margin-top: 2.5rem;
  padding: 1rem 1.25rem;
  background: var(--bg);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  font-size: .85rem;
  color: var(--text-dim);
  font-style: italic;
}

/* ── Contact form ── */
.contact-page h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: .5rem;
}
.contact-page > p {
  color: var(--text-dim);
  margin-bottom: 2rem;
}
.contact-form {
  max-width: 520px;
  background: var(--bg-card);
  padding: 2rem;
  border-radius: 14px;
  box-shadow: 0 2px 8px rgba(0,0,0,.05);
}
.form-group {
  margin-bottom: 1.15rem;
}
.form-group label {
  display: block;
  margin-bottom: .3rem;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text);
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: .92rem;
  font-family: inherit;
  transition: border-color .2s, box-shadow .2s;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent);
}
.form-group textarea {
  resize: vertical;
  min-height: 130px;
}
.form-submit {
  display: inline-block;
  padding: 11px 28px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 100px;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s, transform .1s;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 25%, transparent);
}
.form-submit:hover { background: var(--accent-hover); }
.form-submit:active { transform: scale(.97); }
.form-success {
  display: none;
  padding: 1rem 1.25rem;
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  border-radius: 10px;
  color: var(--accent);
  margin-top: 1rem;
  font-weight: 500;
}
.form-success.show { display: block; }

/* ── Footer ── */
footer {
  margin-top: auto;
  padding: 1.5rem;
  text-align: center;
  color: var(--text-dim);
  font-size: .82rem;
}
footer::before {
  content: "";
  display: block;
  height: 1px;
  max-width: 880px;
  margin: 0 auto 1.5rem;
  background: var(--border);
}
footer a { color: var(--text-dim); }
footer a:hover { color: var(--accent); }
.footer-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-bottom: .4rem;
}

/* ── Responsive ── */
@media (max-width: 640px) {
  .hamburger { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0; right: 0;
    background: var(--bg-card);
    box-shadow: 0 4px 12px rgba(0,0,0,.08);
    flex-direction: column;
    padding: 1rem 1.5rem;
    gap: .5rem;
  }
  .nav-links.open { display: flex; }
  .hero h1 { font-size: 1.9rem; }
  .hero > p { font-size: 1rem; }
  .contact-form { padding: 1.25rem; }
}