/* ============================================================
   GoldNet Road Safety — Safe System Analysis Feed
   Dark Theme
   ============================================================ */

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

:root {
  --bg:          #0a0a0f;
  --surface:     #13131a;
  --surface-2:   #1c1c28;
  --border:      #22223a;
  --accent:      #0077b5;
  --accent-glow: rgba(0, 119, 181, 0.18);
  --accent-hover:#0091d9;
  --text:        #e2e2ec;
  --text-muted:  #888899;
  --text-dim:    #555570;
  --tag-bg:      rgba(0, 119, 181, 0.12);
  --tag-border:  rgba(0, 119, 181, 0.35);
  --radius:      12px;
  --radius-sm:   6px;
  --shadow:      0 2px 16px rgba(0,0,0,0.45);
  --shadow-hover:0 8px 32px rgba(0,0,0,0.65);
  --font:        'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono:   'Fira Code', 'Consolas', monospace;
  --transition:  0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Header ─────────────────────────────────────────────── */

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
}

.header-inner {
  max-width: 800px;
  margin: 0 auto;
  height: 64px;
  display: flex;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.logo-mark {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent), #005a8e);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

.logo-tag {
  font-size: 0.7rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 500;
}

/* ── Main / Feed ─────────────────────────────────────────── */

main {
  flex: 1;
  padding: 2.5rem 1.5rem 4rem;
}

.feed {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

/* ── Loading state ───────────────────────────────────────── */

.loading {
  color: var(--text-muted);
  text-align: center;
  padding: 4rem 0;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50%       { opacity: 1;   }
}

/* ── Post Card ───────────────────────────────────────────── */

.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  box-shadow: var(--shadow);
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    border-color var(--transition);
  animation: card-in 0.4s ease both;
}

.post-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(0, 119, 181, 0.35);
}

@keyframes card-in {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0);    }
}

/* ── Author row ──────────────────────────────────────────── */

.post-author {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin-bottom: 1.1rem;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #003d5c);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: #fff;
  flex-shrink: 0;
  letter-spacing: 0.5px;
  border: 2px solid var(--border);
}

.author-info {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.author-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
}

.author-role {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.author-timestamp {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--text-dim);
  white-space: nowrap;
  align-self: flex-start;
  margin-top: 2px;
}

/* ── Post title ──────────────────────────────────────────── */

.post-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
  margin-bottom: 0.9rem;
  letter-spacing: -0.01em;
}

/* ── Tags ────────────────────────────────────────────────── */

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.1rem;
}

.post-tag {
  display: inline-block;
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  color: var(--accent-hover);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.22rem 0.7rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: background var(--transition), border-color var(--transition);
}

.post-tag:hover {
  background: rgba(0, 119, 181, 0.22);
  border-color: var(--accent);
}

/* ── Video ───────────────────────────────────────────────── */

.post-video-wrap {
  margin-bottom: 1.2rem;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #000;
  border: 1px solid var(--border);
}

.post-video {
  display: block;
  width: 100%;
  max-height: 400px;
  object-fit: contain;
  background: #000;
}

/* ── Body text ───────────────────────────────────────────── */

.post-body {
  font-size: 0.94rem;
  color: var(--text);
  line-height: 1.72;
  margin-bottom: 1.25rem;
}

.post-body strong {
  color: #fff;
  font-weight: 600;
}

.post-body em {
  color: var(--text-muted);
  font-style: italic;
}

/* ── Footer metadata bar ─────────────────────────────────── */

.post-footer {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.73rem;
  color: var(--text-dim);
  flex-wrap: wrap;
}

.post-footer-dot {
  color: var(--text-dim);
  opacity: 0.5;
}

/* ── Page footer ─────────────────────────────────────────── */

footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-dim);
  background: var(--surface);
}

/* ── Scrollbar ───────────────────────────────────────────── */

::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

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

@media (max-width: 600px) {
  header { padding: 0 1rem; }
  main   { padding: 1.5rem 1rem 3rem; }

  .post-card {
    padding: 1.25rem 1.1rem;
    border-radius: 10px;
  }

  .post-title {
    font-size: 1.02rem;
  }

  .author-timestamp {
    display: none;
  }

  .post-footer {
    font-size: 0.68rem;
  }

  .logo-name {
    font-size: 0.88rem;
  }

  .logo-tag {
    font-size: 0.65rem;
  }
}

@media (max-width: 400px) {
  .post-card {
    padding: 1rem 0.85rem;
  }
}