/* ============================================
   Five9 News — Stylesheet
   Palette: neutral charcoal, warm accents, clean whitespace
   ============================================ */

:root {
  --color-bg:        #75ca7a;
  --color-surface:   #F1FEFB;
  --color-border:    #5cb85c;
  --color-text:      #1a1d23;
  --color-text-secondary: #5a6270;
  --color-text-muted: #8a919e;
  --color-accent:    #2563eb;        /* blue — trustworthy, tech */
  --color-accent-hover: #1d4ed8;
  --color-accent-soft: #eff6ff;
  --color-success:   #059669;
  --color-warning:   #d97706;
  --color-danger:    #dc2626;
  --color-cyber:     #7c3aed;        /* purple — security */
  --color-cloud:     #0891b2;        /* cyan — infrastructure */
  --color-ai:        #ea580c;        /* orange — AI/energy */
  --color-business:  #059669;        /* green — business */
  --color-compliance:#9333ea;        /* violet — compliance */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.08);
  --transition: 0.2s ease;
  --max-width: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(241,254,251,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 0;
}


/* Logo styles */
.brand-logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  margin-right: 0;
}
.brand-group {
  display: flex;
  align-items: center;
  gap: 2px;
}



.brand-img {
  height: 40px;
  width: auto;
  display: block;
  transition: opacity 0.2s ease;
}

.brand-logo:hover .brand-img {
  opacity: 0.8;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 2px;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  margin-left: 2px;
}
.brand-sep  { color: var(--color-text-muted); font-weight: 300; }
.brand-sub  { color: var(--color-accent); font-weight: 600; }

.main-nav {
  display: flex;
  gap: 28px;
}

.main-nav a {
  text-decoration: none;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition);
}

.main-nav a:hover { color: var(--color-accent); }

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: var(--transition);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  padding: 64px 0 48px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  max-width: 720px;
  margin: 0 auto 16px;
  color: #ffffff;
  text-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.hero-sub {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.9);
  max-width: 560px;
  margin: 0 auto 24px;
  line-height: 1.5;
}

.hero-meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.85);
}

.live-pulse {
  width: 8px;
  height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.live-text { font-weight: 500; color: var(--color-success); }
.last-updated { font-variant-numeric: tabular-nums; }

/* ============================================
   CONTROLS — Filter + Search
   ============================================ */
.controls {
  padding: 24px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 32px;
  position: sticky;
  top: 64px;
  background: rgba(241,254,251,0.96);
  backdrop-filter: blur(8px);
  z-index: 90;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-btn {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

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

.filter-btn.active {
  background: #1a1d23;
  color: #fff;
  border-color: #1a1d23;
}

.search-box input {
  width: 260px;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-family: inherit;
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-box input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.search-box input::placeholder { color: var(--color-text-muted); }

/* ============================================
   ARTICLES GRID
   ============================================ */
.articles-section { padding-bottom: 64px; }

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

/* Loading state */
.loading-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 0;
  color: var(--color-text-muted);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Article card */
.article-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: box-shadow var(--transition), transform var(--transition);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

.article-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.article-card.hidden { display: none; }

/* Category badge */
.cat-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  width: fit-content;
}

.cat-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.cat-badge.cybersecurity { background: #ede9fe; color: var(--color-cyber); }
.cat-badge.cloud        { background: #ecfeff; color: var(--color-cloud); }
.cat-badge.ai           { background: #ffedd5; color: var(--color-ai); }
.cat-badge.business     { background: #d1fae5; color: var(--color-business); }
.cat-badge.compliance   { background: #f3e8ff; color: var(--color-compliance); }

/* Headline */
.article-title {
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Summary */
.article-summary {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Meta line */
.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px solid var(--color-border);
}

.article-source {
  font-weight: 600;
  color: var(--color-text-secondary);
}

.article-time {
  font-variant-numeric: tabular-nums;
}

/* ============================================
   LOAD MORE
   ============================================ */
.load-more-wrap {
  text-align: center;
  padding: 40px 0;
}

.btn-load-more {
  padding: 12px 28px;
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.btn-load-more:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 48px 0 32px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: start;
}

.footer-brand .brand-mark {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 6px;
  max-width: 280px;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}

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

.footer-legal {
  grid-column: 1 / -1;
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.footer-legal p + p { margin-top: 4px; }

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 24px;
  color: var(--color-text-muted);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  margin-bottom: 16px;
  opacity: 0.4;
}

.empty-state h3 {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .main-nav { display: none; }
  .mobile-menu-btn { display: flex; }

  .hero { padding: 40px 0 32px; }
  .hero h1 { font-size: 1.75rem; }

  .controls {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    top: 56px;
  }

  .filter-bar { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; }
  .search-box input { width: 100%; }

  .articles-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer-brand p { max-width: none; }
  .footer-links { justify-content: center; }
}