/* Dark is the default theme; light applies when <html data-theme="light"> */
:root {
  --bg: #0c0a09;
  --surface: #1c1917;
  --text: #f5f5f4;
  --muted: #a8a29e;
  --border: #292524;
  --accent: #818cf8;
  --accent-text: #0c0a09;
  --radius: 10px;
  --max: 960px;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #fafaf9;
  --surface: #ffffff;
  --text: #1c1917;
  --muted: #57534e;
  --border: #e7e5e4;
  --accent: #4f46e5;
  --accent-text: #ffffff;
  color-scheme: light;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a { color: var(--accent); }
img { max-width: 100%; height: auto; }

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 16px;
}

/* Header / nav */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-top: 14px;
  padding-bottom: 14px;
}
.brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.brand span { color: var(--accent); }
.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 4px 0;
}
.site-nav a:hover,
.site-nav a[aria-current="page"] { color: var(--text); }
.site-nav a[aria-current="page"] { border-bottom: 2px solid var(--accent); }
.site-nav { display: flex; align-items: center; gap: 18px; }

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--muted); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* Main */
main { flex: 1; padding: 40px 0 56px; }
h1 { font-size: clamp(1.8rem, 5vw, 2.6rem); line-height: 1.15; margin: 0 0 12px; letter-spacing: -0.02em; }
h2 { font-size: 1.3rem; margin: 40px 0 12px; }
h3 { font-size: 1.1rem; margin: 0 0 6px; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 60ch; margin: 0 0 24px; }
.muted { color: var(--muted); }

.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-text);
  text-decoration: none;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: var(--radius);
  border: 0;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.btn.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.actions { display: flex; flex-wrap: wrap; gap: 10px; }

/* Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.card p { margin: 0; color: var(--muted); }
.card .links { margin-top: auto; padding-top: 8px; display: flex; gap: 14px; flex-wrap: wrap; font-size: 0.95rem; }
.tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 1px 8px;
  align-self: flex-start;
}

/* Notice box */
.notice {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin: 24px 0;
}
.notice p { margin: 0; }

/* Forms */
form { max-width: 560px; display: grid; gap: 16px; }
label { display: grid; gap: 6px; font-weight: 600; font-size: 0.95rem; }
input, select, textarea {
  font: inherit;
  font-weight: 400;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
textarea { min-height: 160px; resize: vertical; }
.hidden { display: none !important; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  font-size: 0.9rem;
  color: var(--muted);
}
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; }
.site-footer a { color: var(--muted); }