/* ============================================================
   ANDREW LOBO — SECURITY BLOG
   style.css
   ============================================================ */

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

:root {
  --bg:         #ffffff;
  --surface:    #f8f9fa;
  --surface2:   #f1f3f5;
  --border:     #e2e8f0;
  --accent:     #0066ff;
  --accent2:    #e11d48;
  --text:       #0f172a;
  --text-dim:   #475569;
  --text-muted: #94a3b8;

  --font-display: 'Syne', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;

  --radius: 6px;
  --transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── HEADER ─────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 15px;
}

.logo-bracket { color: var(--accent); }
.logo-name    { color: var(--text); }
.logo-tag     { color: var(--text-dim); margin-left: 10px; font-size: 12px; }

.header-nav { display: flex; gap: 24px; }

.nav-link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.03em;
  transition: color var(--transition);
}

.nav-link:hover,
.nav-link.active { color: var(--accent); }

/* ── HERO ────────────────────────────────────────────────── */
.hero {
  position: relative;
  padding: 100px 32px 80px;
  overflow: hidden;
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-label {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3vw, 64px);
  line-height: 1.0;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 28px;
}

.hero-title .accent { color: var(--accent2); }

.hero-desc {
  max-width: 520px;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.8;
}

/* Background grid */
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.3;
  mask-image: radial-gradient(ellipse 80% 60% at 60% 40%, black 20%, transparent 80%);
}

/* ── CATEGORIES ──────────────────────────────────────────── */
.categories-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px 100px;
}

.section-label {
  color: var(--text-dim);
  font-size: 12px;
  letter-spacing: 0.1em;
  margin-bottom: 32px;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.category-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 18px;
  transition:
    border-color var(--transition),
    transform var(--transition),
    background var(--transition);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.04) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
}

.category-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  background: var(--surface2);
}

.category-card:hover::before { opacity: 1; }

.card-icon {
  font-size: 28px;
  flex-shrink: 0;
  line-height: 1;
  margin-top: 2px;
}

.card-content { flex: 1; }

.card-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.card-desc {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.6;
}

.card-arrow {
  color: var(--text-muted);
  font-size: 18px;
  align-self: center;
  transition: color var(--transition), transform var(--transition);
}

.category-card:hover .card-arrow {
  color: var(--accent);
  transform: translateX(4px);
}

/* ── POSTS SECTION ───────────────────────────────────────── */
.posts-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 32px 100px;
}

.posts-section.hidden { display: none; }

.back-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 8px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  margin-bottom: 48px;
  letter-spacing: 0.05em;
  transition: border-color var(--transition), color var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.back-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.posts-header { margin-bottom: 40px; }

.posts-category-label {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.posts-category-label::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--accent);
}

.posts-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 5vw, 56px);
  color: var(--text);
  letter-spacing: -0.02em;
}

/* ── POST CARDS ──────────────────────────────────────────── */
.posts-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.post-card {
  background: var(--surface);
  padding: 24px 28px;
  display: flex;
  align-items: flex-start;
  gap: 24px;
  text-decoration: none;
  color: inherit;
  transition: background var(--transition);
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}

.post-card:last-child { border-bottom: none; }

.post-card:hover { background: var(--surface2); }

.post-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  flex-shrink: 0;
  min-width: 100px;
}

.post-date {
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.05em;
}

.post-tag {
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(0, 229, 255, 0.08);
  padding: 2px 8px;
  border-radius: 100px;
  margin-top: 6px;
  border: 1px solid rgba(0, 229, 255, 0.2);
}

.post-body { flex: 1; }

.post-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
  margin-bottom: 6px;
  letter-spacing: -0.01em;
  transition: color var(--transition);
}

.post-card:hover .post-title { color: var(--accent); }

.post-excerpt {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.7;
}

.post-mitre {
  margin-top: 10px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.mitre-badge {
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--accent2);
  background: rgba(247, 243, 243, 0.07);
  border: 1px solid rgb(241, 234, 235);
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.05em;
}

/* Empty state */
.empty-state {
  padding: 64px 28px;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
}

.empty-state .empty-icon { font-size: 32px; margin-bottom: 12px; }
.empty-state .empty-msg { color: var(--text-muted); font-size: 12px; margin-top: 6px; }

/* ── FOOTER ──────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 32px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.footer-text  { color: var(--text-dim); font-size: 12px; }
.footer-stack { color: var(--text-muted); font-size: 11px; letter-spacing: 0.08em; }

/* ── UTILITIES ───────────────────────────────────────────── */
.hidden { display: none !important; }

/* ── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 640px) {
  .header-inner { padding: 14px 20px; }
  .hero         { padding: 64px 20px 48px; }
  .categories-section { padding: 0 20px 64px; }
  .posts-section { padding: 32px 20px 64px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .post-card    { flex-direction: column; gap: 12px; }
  .post-meta    { align-items: flex-start; flex-direction: row; gap: 12px; }
}

/* ── HERO ROTATIVO ───────────────────────────────────────── */
.hero-rotate {
  display: inline-flex;
  flex-direction: column;
  overflow: hidden;
  height: 1.1em;
  vertical-align: bottom;
}

.hero-rotate span {
  animation: heroSlide 10s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  line-height: 1.1em;
}

@keyframes heroSlide {
  0%        { transform: translateY(0%); }
  22%       { transform: translateY(0%); }
  25%       { transform: translateY(-100%); }
  47%       { transform: translateY(-100%); }
  50%       { transform: translateY(-200%); }
  72%       { transform: translateY(-200%); }
  75%       { transform: translateY(-300%); }
  97%       { transform: translateY(-300%); }
  100%      { transform: translateY(0%); }
}