/* ============================================================
   AI DAILY — style.css
   Design System: Dark Mode, Electric Violet, Inter Font
   ============================================================ */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Playfair+Display:wght@700;900&display=swap');

/* --- Design Tokens (CSS Variables) --- */
:root {
  --color-bg:           #0a0a0f;
  --color-surface:      #111118;
  --color-surface-2:    #1a1a24;
  --color-border:       #2a2a3a;
  --color-accent:       #6C63FF;
  --color-accent-hover: #8B85FF;
  --color-accent-glow:  rgba(108, 99, 255, 0.25);
  --color-red:          #FF4D4D;
  --color-text:         #F0F0F8;
  --color-text-muted:   #8888aa;
  --color-text-dim:     #555570;
  --color-category-agents:    #00C9A7;
  --color-category-research:  #6C63FF;
  --color-category-policy:    #FF9F43;
  --color-category-hardware:  #4FC3F7;
  --color-category-analysis:  #F368E0;
  --color-category-breaking:  #FF4D4D;

  --font-sans:    'Inter', sans-serif;
  --font-serif:   'Playfair Display', serif;

  --radius-sm:    6px;
  --radius-md:    12px;
  --radius-lg:    18px;

  --shadow-card:  0 4px 24px rgba(0,0,0,0.5);
  --shadow-hover: 0 8px 40px rgba(108,99,255,0.2);

  --transition:   all 0.25s ease;

  --max-width:    1280px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ============================================================
   HEADER & NAVIGATION
   ============================================================ */

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

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

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-accent), #a78bfa);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 2px;
  text-transform: uppercase;
  background: linear-gradient(135deg, #ffffff, var(--color-accent-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.header-nav a {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: var(--transition);
  letter-spacing: 0.3px;
}

.header-nav a:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

.header-date {
  font-size: 12px;
  color: var(--color-text-dim);
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

/* ============================================================
   BREAKING NEWS TICKER
   ============================================================ */

.ticker-bar {
  background: linear-gradient(90deg, #1a0a1a, #0f0f1f, #1a0a1a);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
  height: 38px;
  display: flex;
  align-items: center;
}

.ticker-label {
  background: var(--color-red);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 0 16px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  white-space: nowrap;
}

.ticker-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #fff;
  animation: blink 1s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.2; }
}

.ticker-track {
  flex: 1;
  overflow: hidden;
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  mask-image: linear-gradient(to right, transparent 0%, black 4%, black 96%, transparent 100%);
}

.ticker-content {
  display: flex;
  gap: 0;
  white-space: nowrap;
  animation: ticker-scroll 40s linear infinite;
}

.ticker-content:hover {
  animation-play-state: paused;
}

@keyframes ticker-scroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.ticker-item {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 0 48px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  transition: color 0.2s;
}

.ticker-item:hover {
  color: var(--color-text);
}

.ticker-item::after {
  content: '◆';
  font-size: 7px;
  color: var(--color-accent);
  margin-left: 12px;
}

/* ============================================================
   MAIN CONTENT WRAPPER
   ============================================================ */

.site-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 24px 60px;
}

/* ============================================================
   SECTION DIVIDER
   ============================================================ */

.section-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.section-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-text-dim);
}

.section-line {
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* ============================================================
   CATEGORY BADGE
   ============================================================ */

.category-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.cat-breaking  { background: rgba(255,77,77,0.15);   color: var(--color-red); }
.cat-agents    { background: rgba(0,201,167,0.12);   color: var(--color-category-agents); }
.cat-research  { background: rgba(108,99,255,0.15);  color: var(--color-accent-hover); }
.cat-policy    { background: rgba(255,159,67,0.12);  color: var(--color-category-policy); }
.cat-hardware  { background: rgba(79,195,247,0.12);  color: var(--color-category-hardware); }
.cat-analysis  { background: rgba(243,104,224,0.12); color: var(--color-category-analysis); }

/* ============================================================
   HERO ARTICLE
   ============================================================ */

.hero-section {
  margin-bottom: 52px;
}

.hero-article {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 420px;
  transition: var(--transition);
  cursor: pointer;
}

.hero-article:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.hero-image-wrap {
  position: relative;
  overflow: hidden;
}

.hero-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.hero-article:hover .hero-image-wrap img {
  transform: scale(1.03);
}

.hero-content {
  padding: 48px 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-2) 100%);
  position: relative;
}

.hero-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at top right, var(--color-accent-glow), transparent 70%);
  pointer-events: none;
}

.hero-tag {
  display: flex;
  align-items: center;
  gap: 10px;
}

.hero-exclusive {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: 2px 10px;
  border-radius: 20px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 900;
  line-height: 1.25;
  color: var(--color-text);
  letter-spacing: -0.5px;
}

.hero-teaser {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--color-text-dim);
  padding-top: 4px;
  border-top: 1px solid var(--color-border);
}

.hero-meta-author {
  color: var(--color-text-muted);
  font-weight: 500;
}

.read-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-accent);
  color: #fff;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.3px;
  transition: var(--transition);
  align-self: flex-start;
  margin-top: 4px;
}

.read-more-btn:hover {
  background: var(--color-accent-hover);
  transform: translateX(3px);
}

.read-more-btn .arrow {
  transition: transform 0.2s;
}

.read-more-btn:hover .arrow {
  transform: translateX(4px);
}

/* ============================================================
   ARTICLE GRID — 3 columns top
   ============================================================ */

.articles-section {
  margin-bottom: 40px;
}

.articles-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.articles-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

/* ============================================================
   ARTICLE CARD
   ============================================================ */

.article-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  cursor: pointer;
}

.article-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.card-image-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.card-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.article-card:hover .card-image-wrap img {
  transform: scale(1.06);
}

.card-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text);
  letter-spacing: -0.2px;
  transition: color 0.2s;
}

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

.card-teaser {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.65;
  flex: 1;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
  margin-top: 4px;
}

.card-meta {
  font-size: 11px;
  color: var(--color-text-dim);
}

.card-link {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s, color 0.2s;
}

.article-card:hover .card-link {
  gap: 8px;
  color: var(--color-accent-hover);
}

/* ============================================================
   FOOTER
   ============================================================ */

.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  margin-top: 60px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 2px;
  text-transform: uppercase;
  background: linear-gradient(135deg, #ffffff, var(--color-accent-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-copy {
  font-size: 12px;
  color: var(--color-text-dim);
  text-align: center;
}

.footer-copy span {
  color: var(--color-accent);
}

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

.footer-links a {
  font-size: 12px;
  color: var(--color-text-dim);
  transition: color 0.2s;
}

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

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 1024px) {
  .articles-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-article {
    grid-template-columns: 1fr;
  }

  .hero-image-wrap {
    height: 240px;
  }

  .hero-content {
    padding: 28px 24px;
  }

  .hero-title {
    font-size: 22px;
  }

  .articles-grid-3,
  .articles-grid-2 {
    grid-template-columns: 1fr;
  }

  .header-nav {
    display: none;
  }

  .header-date {
    display: none;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}