/* ═══════════════════════════════════════════════════════════════
   PUBLIC SITE STYLES — Front-facing for clients & visitors
   Clean navigation, blog layout, landing page
   ═══════════════════════════════════════════════════════════════ */

:root {
  --bg: #050507;
  --bg-surface: #0a0a0e;
  --bg-card: #0f0f14;
  --bg-card-hover: #151519;
  --text: #f0f0f5;
  --text-dim: #9a9ab0;
  --text-muted: #555568;
  --accent: #dc2626;
  --accent-hover: #ef4444;
  --accent-glow: rgba(220, 38, 38, 0.3);
  --green: #22c55e;
  --blue: #3b82f6;
  --purple: #8b5cf6;
  --gold: #f59e0b;
  --border: rgba(255, 255, 255, 0.06);
  --border-light: rgba(255, 255, 255, 0.1);
  --glass: rgba(255, 255, 255, 0.03);
  --radius: 16px;
  --radius-sm: 10px;
  --max-w: 1200px;
  --max-w-narrow: 800px;
}

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

body {
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(220, 38, 38, 0.04) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(192, 192, 208, 0.03) 0%, transparent 50%);
  background-attachment: fixed;
}

a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-hover); }

/* ─── Top Navigation ────────────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(5, 5, 7, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.site-nav .nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 64px;
}

.site-nav .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1em;
  color: var(--text);
  letter-spacing: -0.02em;
}

.site-nav .brand .icon {
  font-size: 1.4em;
}

.site-nav .nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav .nav-links a {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.9em;
  font-weight: 500;
  color: var(--text-dim);
  transition: all 0.2s;
}

.site-nav .nav-links a:hover,
.site-nav .nav-links a.active {
  color: var(--text);
  background: var(--glass);
}

.site-nav .nav-links .btn-cta {
  background: var(--accent);
  color: white;
  padding: 8px 20px;
  border-radius: 8px;
  font-weight: 600;
  margin-left: 8px;
}

.site-nav .nav-links .btn-cta:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 20px var(--accent-glow);
}

/* ─── Hero Section ──────────────────────────────────────────── */
.hero {
  padding: 140px 24px 80px;
  text-align: center;
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(220, 38, 38, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero .badge-line {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 20px;
  background: rgba(220, 38, 38, 0.08);
  border: 1px solid rgba(220, 38, 38, 0.2);
  font-size: 0.85em;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2.5em, 6vw, 4.5em);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--text) 0%, #c0c0d0 50%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .subtitle {
  font-size: clamp(1.1em, 2vw, 1.4em);
  color: var(--text-dim);
  max-width: 640px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

.hero .hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-hero {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 12px;
  font-size: 1em;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.3s;
}

.btn-hero.primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-hero.primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 8px 30px var(--accent-glow);
  transform: translateY(-2px);
}

.btn-hero.secondary {
  background: var(--glass);
  color: var(--text);
  border: 1px solid var(--border-light);
}

.btn-hero.secondary:hover {
  background: rgba(255,255,255,0.06);
  transform: translateY(-2px);
}

/* ─── Stats Bar ─────────────────────────────────────────────── */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: 48px;
  padding: 40px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
  flex-wrap: wrap;
}

.stats-bar .stat {
  text-align: center;
}

.stats-bar .stat-num {
  font-size: 2.2em;
  font-weight: 800;
  background: linear-gradient(135deg, var(--text), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stats-bar .stat-label {
  font-size: 0.85em;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ─── Features Grid ─────────────────────────────────────────── */
.features-section {
  padding: 60px 24px 80px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.features-section h2 {
  text-align: center;
  font-size: 2.2em;
  font-weight: 700;
  margin-bottom: 12px;
}

.features-section .section-sub {
  text-align: center;
  color: var(--text-dim);
  margin-bottom: 48px;
  font-size: 1.1em;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  border-color: rgba(220, 38, 38, 0.2);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.feature-card .feature-icon {
  font-size: 2em;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.2em;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--text-dim);
  font-size: 0.95em;
  line-height: 1.6;
}

/* ─── Blog Section ──────────────────────────────────────────── */
.blog-section {
  padding: 80px 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.blog-section h2 {
  text-align: center;
  font-size: 2.2em;
  font-weight: 700;
  margin-bottom: 12px;
}

.blog-section .section-sub {
  text-align: center;
  color: var(--text-dim);
  margin-bottom: 48px;
  font-size: 1.1em;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.3s;
  cursor: pointer;
}

.blog-card:hover {
  border-color: rgba(220, 38, 38, 0.2);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.blog-card .card-cover {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4em;
  background: linear-gradient(135deg, rgba(220,38,38,0.1), rgba(59,130,246,0.05));
}

.blog-card .card-body {
  padding: 24px;
}

.blog-card .card-category {
  font-size: 0.75em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 8px;
}

.blog-card .card-title {
  font-size: 1.15em;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
}

.blog-card .card-excerpt {
  font-size: 0.9em;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card .card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8em;
  color: var(--text-muted);
}

/* ─── Blog Article View ─────────────────────────────────────── */
.article-view {
  padding: 100px 24px 80px;
  max-width: var(--max-w-narrow);
  margin: 0 auto;
}

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

.article-header .back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-dim);
  font-size: 0.9em;
  margin-bottom: 24px;
}

.article-header .back-link:hover { color: var(--text); }

.article-header .article-cat {
  font-size: 0.8em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 12px;
}

.article-header h1 {
  font-size: 2.4em;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.article-header .article-subtitle {
  font-size: 1.2em;
  color: var(--text-dim);
  margin-bottom: 20px;
}

.article-header .article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.85em;
  color: var(--text-muted);
}

.article-meta .dot { opacity: 0.3; }

.article-content {
  font-size: 1.05em;
  line-height: 1.8;
}

.article-content h2 {
  font-size: 1.6em;
  font-weight: 700;
  margin: 48px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.article-content h3 {
  font-size: 1.25em;
  font-weight: 600;
  margin: 32px 0 12px;
}

.article-content p {
  margin-bottom: 20px;
  color: #d0d0e0;
}

.article-content ul, .article-content ol {
  margin: 0 0 20px 24px;
  color: #d0d0e0;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content strong {
  color: var(--text);
}

.article-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 16px 24px;
  margin: 24px 0;
  background: rgba(220, 38, 38, 0.05);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--text-dim);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.95em;
}

.article-content th, .article-content td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.article-content th {
  color: var(--text);
  font-weight: 600;
  background: var(--glass);
}

.article-content td {
  color: var(--text-dim);
}

.article-actions {
  display: flex;
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.article-actions button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 8px;
  border: 1px solid var(--border-light);
  background: var(--glass);
  color: var(--text-dim);
  font-size: 0.9em;
  cursor: pointer;
  transition: all 0.2s;
}

.article-actions button:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border-color: var(--accent);
}

/* ─── Blog Categories Nav ───────────────────────────────────── */
.category-nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 40px;
}

.category-nav button {
  padding: 8px 18px;
  border-radius: 20px;
  border: 1px solid var(--border-light);
  background: var(--glass);
  color: var(--text-dim);
  font-size: 0.85em;
  cursor: pointer;
  transition: all 0.2s;
}

.category-nav button:hover,
.category-nav button.active {
  background: rgba(220, 38, 38, 0.1);
  border-color: rgba(220, 38, 38, 0.3);
  color: var(--accent);
}

/* ─── Newsletter / CTA ──────────────────────────────────────── */
.newsletter-section {
  padding: 80px 24px;
  text-align: center;
}

.newsletter-box {
  max-width: 600px;
  margin: 0 auto;
  padding: 48px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}

.newsletter-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--purple), var(--blue));
}

.newsletter-box h3 {
  font-size: 1.5em;
  margin-bottom: 8px;
}

.newsletter-box p {
  color: var(--text-dim);
  margin-bottom: 24px;
}

.newsletter-form {
  display: flex;
  gap: 10px;
}

.newsletter-form input {
  flex: 1;
  padding: 12px 18px;
  border-radius: 10px;
  border: 1px solid var(--border-light);
  background: var(--bg);
  color: var(--text);
  font-size: 0.95em;
  outline: none;
}

.newsletter-form input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.newsletter-form button {
  padding: 12px 24px;
  border-radius: 10px;
  background: var(--accent);
  color: white;
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.newsletter-form button:hover {
  background: var(--accent-hover);
}

/* ─── Footer ────────────────────────────────────────────────── */
.site-footer {
  padding: 40px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.site-footer .footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.site-footer .footer-brand {
  font-weight: 600;
  color: var(--text-dim);
}

.site-footer .footer-links {
  display: flex;
  gap: 24px;
}

.site-footer .footer-links a {
  color: var(--text-muted);
  font-size: 0.85em;
}

.site-footer .footer-links a:hover {
  color: var(--text);
}

/* ─── Page Content Container ────────────────────────────────── */
#site-content {
  min-height: calc(100vh - 64px);
}

/* ─── Toast ─────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 14px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 10px;
  color: var(--text);
  font-size: 0.9em;
  z-index: 9999;
  animation: toastIn 0.3s ease;
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Hamburger ─────────────────────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 1001;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ─── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
  .site-nav .nav-inner { padding: 0 16px; }
  .hamburger { display: flex; }
  .site-nav .nav-links {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 18, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px 20px;
    gap: 0;
    border-bottom: 1px solid var(--border);
    z-index: 1000;
  }
  .site-nav .nav-links.open { display: flex; }
  .site-nav .nav-links a {
    padding: 14px 0;
    font-size: 1.1em;
    border-bottom: 1px solid var(--border);
  }
  .site-nav .nav-links .btn-cta {
    margin-top: 16px;
    text-align: center;
    border-bottom: none;
  }
  .hero { padding: 120px 16px 60px; }
  .stats-bar { gap: 24px; }
  .features-grid { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .newsletter-form { flex-direction: column; }
  .site-footer .footer-inner { flex-direction: column; }
  .article-header h1 { font-size: 1.8em; }
}