/* Basic reset & variables */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
:root {
  --bg: #0f1216;
  --bg-muted: #161a20;
  --text: #e9eef6;
  --text-dim: #b7c2d3;
  --surface: #1c2129;
  --accent: #69f0ae; /* swap for brand accent */
  --accent-2: #7aa2f7;
  --border: #2a313b;
  --shadow: 0 6px 20px rgba(0,0,0,0.35);
  --radius: 12px;
  --font-sans: "Inter", system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "DM Serif Text", Georgia, serif;
  --container: 1100px;
  --gap: 22px;
}

/* Light mode (optional, toggled via class in JS later) */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f9fc;
    --bg-muted: #eef2f8;
    --text: #1c2430;
    --text-dim: #5a6a82;
    --surface: #ffffff;
    --accent: #1f8cff;
    --accent-2: #7c4dff;
    --border: #dde4ee;
  }
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
p { margin: 0 0 1rem; }
h1,h2,h3,h4 { margin: 0 0 .5rem; line-height: 1.25; }
h1 { font-family: var(--font-serif); font-size: clamp(2rem, 6vw, 3rem); }
h2 { font-size: clamp(1.6rem, 4vw, 2.2rem); }
h3 { font-size: clamp(1.2rem, 3vw, 1.5rem); }
h4 { font-size: 1.1rem; }

.skip-link {
  position: absolute; left: -9999px; top: -9999px;
}
.skip-link:focus {
  left: 16px; top: 16px; background: var(--surface); color: var(--text);
  padding: 8px 12px; border-radius: 8px; box-shadow: var(--shadow);
}

/* Layout */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 20px; }
.section { padding: 64px 0; }
.section-muted { background: var(--bg-muted); }
.section-header { margin-bottom: 24px; }

.grid { display: grid; gap: var(--gap); }
.grid-2 { grid-template-columns: 1fr; }
.grid-2-uneven { display: grid; gap: var(--gap); grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
@media (min-width: 860px) {
  .grid-2 { grid-template-columns: 1.2fr 0.8fr; }
  .grid-2-uneven { grid-template-columns: 1fr 1fr; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

/* Header */
.site-header {
  position: sticky; top: 0; backdrop-filter: saturate(1.2) blur(8px);
  background: color-mix(in oklab, var(--bg) 92%, transparent);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}
.header-inner { display: flex; align-items: center; gap: 16px; padding: 14px 0; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); }
.brand-mark {
  width: 34px; height: 34px; display: inline-grid; place-items: center;
  border: 2px solid var(--border); border-radius: 50%;
}
.primary-nav ul { display: flex; gap: 14px; list-style: none; margin: 0; padding: 0; }
.primary-nav a { color: var(--text); padding: 8px 10px; border-radius: 8px; }
.primary-nav a:hover { background: var(--surface); }
.primary-nav .cta { color: var(--bg); background: var(--accent); border-radius: 10px; }
.theme-toggle {
  margin-left: auto; padding: 8px 10px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
}

/* Hero */
.hero { padding: 80px 0; background: linear-gradient(135deg, color-mix(in oklab, var(--bg), var(--accent) 3%), var(--bg)); }
.hero-inner { display: grid; gap: var(--gap); align-items: center; grid-template-columns: 1fr; }
@media (min-width: 860px) { .hero-inner { grid-template-columns: 1.1fr 0.9fr; } }
.hero-copy p { color: var(--text-dim); max-width: 52ch; }
.hero-actions { display: flex; gap: 12px; margin-top: 16px; }
.hero-visual { height: 240px; position: relative; }
.shape { position: absolute; border-radius: 12px; opacity: 0.25; }
.shape-gear { width: 160px; height: 160px; background: var(--accent-2); top: 20px; left: 10px; }
.shape-chart { width: 220px; height: 120px; background: var(--accent); bottom: 10px; right: 20px; }

/* Cards & UI */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}
.card-outline {
  background: transparent;
  border: 1px dashed var(--border);
}
.link { display: inline-block; margin-top: 6px; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 12px 0 0; list-style: none; }
.tags li {
  border: 1px solid var(--border);
  padding: 6px 10px; border-radius: 999px; color: var(--text-dim);
}
.filters { display: flex; gap: 8px; margin-top: 8px; }
.chip {
  background: transparent; color: var(--text);
  border: 1px solid var(--border); border-radius: 999px; padding: 6px 12px; cursor: pointer;
}
.chip.is-active { background: var(--surface); }

.btn {
  display: inline-block; padding: 10px 14px; border-radius: 10px; border: 1px solid var(--border);
}
.btn-primary { background: var(--accent); color: var(--bg); border-color: transparent; }
.btn-secondary { background: var(--surface); color: var(--text); }

/* Lists & media */
.list { padding: 0; margin: 0; list-style: none; display: grid; gap: 10px; }
.list-media .media { display: grid; grid-template-columns: 64px 1fr; gap: 12px; align-items: start; }
.media-thumb { width: 64px; height: 64px; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; }

/* Forms */
label { display: block; margin: 12px 0 6px; color: var(--text-dim); }
input, textarea {
  width: 100%; padding: 10px 12px; color: var(--text);
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
}
input::placeholder, textarea::placeholder { color: var(--text-dim); }
form .btn { margin-top: 12px; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg), black 6%);
  padding: 28px 0;
}
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.social { list-style: none; display: flex; gap: 12px; margin: 0; padding: 0; }
.social a { color: var(--text-dim); }