/* --------- Reset --------- */
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; padding: 0; }
img { max-width: 100%; display: block; }
body, h1, h2, h3, p { margin: 0; }

/* --------- Theme Variables --------- */
:root {
  --bg: #0e0f12;
  --surface: #12141a;
  --card: #161922;
  --text: #e9edf1;
  --muted: #9aa3ad;
  --accent: #8b5cf6;
  --accent-2: #22d3ee;
  --ring: #3b82f6;
  --shadow: 0 10px 30px rgba(0,0,0,.25);
}

html[data-theme="light"] {
  --bg: #fafafa;
  --surface: #ffffff;
  --card: #ffffff;
  --text: #0b1220;
  --muted: #485166;
  --accent: #6d28d9;
  --accent-2: #0891b2;
  --ring: #2563eb;
  --shadow: 0 10px 24px rgba(2,6,23,.08);
}

/* --------- Body --------- */
body {
  font: 500 16px/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: radial-gradient(1200px 800px at 20% -10%, rgba(139,92,246,.15), transparent 60%),
              radial-gradient(900px 700px at 120% 0%, rgba(34,211,238,.12), transparent 60%),
              var(--bg);
  color: var(--text);
}

.container {
  width: min(1150px, 92vw);
  margin-inline: auto;
}

/* --------- Navbar --------- */
.navbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 14px 20px;
  background: color-mix(in oklab, var(--surface) 82%, transparent);
  border-bottom: 1px solid color-mix(in oklab, var(--text) 12%, transparent);
  backdrop-filter: blur(10px);
}

.brand {
  font-weight: 800; font-size: 22px;
  text-decoration: none; color: var(--text);
}
.brand span { color: var(--accent-2); }

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  margin-left: 18px;
  font-weight: 600;
}
.nav-links a.active, .nav-links a:hover { color: var(--text); }

/* --------- Controls --------- */
.controls {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  padding: 16px 20px;
  width: min(1150px, 92vw);
  margin-inline: auto;
}

.search-wrap input,
.select-wrap select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid color-mix(in oklab, var(--text) 10%, transparent);
  background: var(--card);
  color: var(--text);
  outline: none;
}

.search-wrap input:focus,
.select-wrap select:focus {
  border-color: var(--ring);
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--ring) 20%, transparent);
}

/* --------- Buttons --------- */
.btn {
  border: none; cursor: pointer;
  padding: 10px 14px;
  border-radius: 12px;
  font-weight: 700;
  color: var(--text);
  background: var(--accent);
  transition: transform .15s ease, box-shadow .2s ease, opacity .2s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn.ghost {
  background: transparent;
  border: 1px solid color-mix(in oklab, var(--text) 12%, transparent);
}
.btn.ghost:hover {
  background: color-mix(in oklab, var(--text) 5%, transparent);
}

/* --------- Grid / Cards --------- */
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 18px;
  padding: 20px 20px 60px;
}

.card {
  grid-column: span 4;
  background: var(--card);
  border: 1px solid color-mix(in oklab, var(--text) 10%, transparent);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex; flex-direction: column;
  transition: transform .18s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--accent); }

.card .media { aspect-ratio: 16/9; overflow: hidden; background: #0b0d12; }
.card img { width: 100%; height: 100%; object-fit: cover; }

.card .content { padding: 16px; display: grid; gap: 10px; }
.card .meta { display: flex; gap: 8px; align-items: center; color: var(--muted); font-size: 13px; }
.badge { font-size: 12px; padding: 4px 8px; border-radius: 999px; background: var(--accent); color: var(--text); }

.card h3 { font-size: 18px; }
.card p { color: var(--muted); }

.card .actions { padding: 0 16px 16px; }
.link { text-decoration: none; font-weight: 700; color: var(--accent-2); }
.link:hover { opacity: .9; }

/* --------- Footer --------- */
.footer {
  border-top: 1px solid color-mix(in oklab, var(--text) 10%, transparent);
  text-align: center;
  padding: 24px 16px;
  color: var(--muted);
}

/* --------- Post Detail --------- */
.post-detail {
  background: var(--card);
  padding: 24px;
  border-radius: 20px;
  margin: 20px 0 40px;
  box-shadow: var(--shadow);
  border: 1px solid color-mix(in oklab, var(--text) 10%, transparent);
}
.post-detail h1 { font-size: 28px; margin-bottom: 12px; }
.post-detail .meta { font-size: 14px; color: var(--muted); margin-bottom: 20px; }
.post-detail img { width: 100%; border-radius: 12px; margin-bottom: 20px; }
.post-detail p { margin-bottom: 16px; line-height: 1.7; }

/* --------- New Post Form --------- */
.post-form {
  background: var(--card);
  padding: 24px;
  border-radius: 20px;
  margin: 20px 0 40px;
  box-shadow: var(--shadow);
  display: grid; gap: 18px;
}
.post-form .field { display: grid; gap: 6px; }
.post-form label { font-weight: 600; font-size: 14px; }
.post-form input, .post-form textarea {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid color-mix(in oklab, var(--text) 12%, transparent);
  background: var(--surface);
  color: var(--text);
  font-size: 15px;
  outline: none;
}
.post-form input:focus, .post-form textarea:focus {
  border-color: var(--ring);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--ring) 20%, transparent);
}

/* --------- Responsive --------- */
@media (max-width: 1100px) {
  .card { grid-column: span 6; }
}
@media (max-width: 700px) {
  .controls { grid-template-columns: 1fr; }
  .card { grid-column: span 12; }
  .nav-links { display: none; }
}