/* ===== KTANA BLOG — Design System V2.0 (WHITE/CLEAN) ===== */
@import url('https://fonts.googleapis.com/css2?family=Zen+Dots&family=Inter:wght@400;500;600;700&display=swap');

:root {
  /* Brand */
  --red: #D70030;
  --red-dark: #A60028;
  --red-deep: #73071F;
  --red-glow: rgba(215, 0, 48, 0.08);
  --red-glow-md: rgba(215, 0, 48, 0.12);

  /* Neutrals — Light System */
  --black: #0A0A0A;
  --dark: #1D1D1F;
  --gray: #6E6E73;
  --gray-mid: #86868B;
  --gray-light: #AEAEB2;
  --surface: #F5F5F7;
  --white: #FFFFFF;
  --border: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(215, 0, 48, 0.2);

  /* Typography */
  --font-heading: 'Zen Dots', cursive;
  --font-body: 'Inter', sans-serif;

  /* Shadows */
  --shadow-sm: 0 2px 12px rgba(215, 0, 48, 0.08);
  --shadow-md: 0 4px 20px rgba(215, 0, 48, 0.12);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.06);

  /* Radius */
  --radius-card: 16px;
  --radius-btn: 12px;
  --radius-badge: 6px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--white);
  color: var(--dark);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--red); text-decoration: none; }
img { max-width: 100%; height: auto; }

/* ===== HEADER ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}
.header-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center;
  justify-content: space-between; height: 64px;
}
.site-logo {
  font-family: var(--font-heading);
  font-size: 1.25rem; color: var(--black);
  display: flex; align-items: center; gap: 2px;
}
.site-logo .dot { color: var(--red); }

.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  color: var(--gray);
  font-size: 0.875rem; font-weight: 500;
  padding: 6px 14px; border-radius: 8px;
  transition: all 200ms ease;
}
.site-nav a:hover { color: var(--black); background: var(--surface); }
.site-nav .nav-cta {
  background: var(--red); color: var(--white) !important;
  padding: 8px 18px; border-radius: var(--radius-btn);
  font-weight: 600; font-size: 0.875rem;
  transition: all 300ms ease;
  box-shadow: 0 0 0 rgba(215,0,48,0);
}
.site-nav .nav-cta:hover {
  background: var(--red-dark);
  box-shadow: 0 0 24px rgba(215,0,48,0.35);
  transform: translateY(-1px);
}

/* ===== HERO ===== */
.page-hero {
  background: var(--surface);
  padding: 80px 24px 72px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.page-hero-inner { max-width: 720px; margin: 0 auto; }
.page-hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--white); border: 1px solid var(--border);
  color: var(--gray); font-size: 0.75rem; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: 6px 14px; border-radius: 100px; margin-bottom: 24px;
}
.page-hero-eyebrow span { color: var(--red); }
.page-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15; letter-spacing: -0.02em;
  color: var(--black); margin-bottom: 16px;
}
.page-hero h1 em { color: var(--red); font-style: normal; }
.page-hero p {
  color: var(--gray);
  font-size: 1.1rem; line-height: 1.7;
  max-width: 560px; margin: 0 auto;
}

/* ===== MAIN ===== */
.site-main { max-width: 1120px; margin: 0 auto; padding: 64px 24px; }

/* ===== POSTS GRID ===== */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

/* ===== POST CARD ===== */
.post-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform 300ms cubic-bezier(0.25,0.1,0.25,1),
              box-shadow 300ms ease,
              border-color 300ms ease;
  position: relative;
}
/* Gradient border effect */
.post-card::before {
  content: '';
  position: absolute; inset: -1.5px;
  border-radius: calc(var(--radius-card) + 1.5px);
  background: linear-gradient(135deg, var(--red), var(--red-deep));
  opacity: 0; transition: opacity 400ms ease;
  z-index: -1;
}
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.post-card:hover::before { opacity: 1; }
.post-card:hover { border-color: transparent; }

.post-card-thumb {
  aspect-ratio: 16/9; overflow: hidden;
  background: var(--surface);
}
.post-card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 500ms ease; }
.post-card:hover .post-card-thumb img { transform: scale(1.04); }
.post-card-no-img {
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--surface) 0%, rgba(215,0,48,0.04) 100%);
  display: flex; align-items: center; justify-content: center;
}
.post-card-no-img .ktana-mark {
  font-family: var(--font-heading); font-size: 2rem;
  color: var(--red); opacity: 0.3;
}

.post-card-body { padding: 24px; }
.post-card-cat {
  display: inline-block;
  background: rgba(215,0,48,0.06); color: var(--red);
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; padding: 4px 10px;
  border-radius: var(--radius-badge); margin-bottom: 12px;
}
.post-card-title {
  font-family: var(--font-heading);
  font-size: 1rem; line-height: 1.35;
  color: var(--black); margin-bottom: 10px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.post-card-excerpt {
  color: var(--gray); font-size: 0.875rem; line-height: 1.65;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.post-card-meta {
  display: flex; align-items: center; gap: 8px;
  margin-top: 18px; padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 0.775rem; color: var(--gray-light);
}
.post-card-meta .sep { color: var(--border); }

/* ===== SINGLE POST ===== */
.single-hero {
  background: var(--surface);
  padding: 64px 24px 56px;
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.single-hero-inner { max-width: 760px; margin: 0 auto; }
.single-cat {
  display: inline-block;
  background: rgba(215,0,48,0.06); color: var(--red);
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; padding: 5px 12px;
  border-radius: var(--radius-badge); margin-bottom: 20px;
}
.single-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.2; letter-spacing: -0.02em;
  color: var(--black); margin-bottom: 20px;
}
.single-meta {
  display: flex; align-items: center; justify-content: center;
  gap: 12px; color: var(--gray); font-size: 0.875rem;
}
.single-cover {
  display: block; width: 100%; max-width: 900px;
  margin: 0 auto; border-radius: var(--radius-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
}

.single-body { max-width: 720px; margin: 56px auto; padding: 0 24px; }

.entry-content { color: var(--dark); font-size: 1.0625rem; line-height: 1.8; }
.entry-content h2 {
  font-family: var(--font-heading); font-size: 1.5rem;
  color: var(--black); margin: 56px 0 20px;
  padding-bottom: 12px; border-bottom: 1px solid var(--border);
}
.entry-content h3 { font-family: var(--font-heading); font-size: 1.15rem; color: var(--black); margin: 40px 0 16px; }
.entry-content p { margin-bottom: 24px; }
.entry-content ul, .entry-content ol { margin: 0 0 24px 28px; }
.entry-content li { margin-bottom: 8px; }
.entry-content strong { color: var(--black); font-weight: 600; }
.entry-content a { color: var(--red); border-bottom: 1px solid rgba(215,0,48,0.2); }
.entry-content blockquote {
  margin: 36px 0; padding: 20px 28px;
  border-left: 3px solid var(--red);
  background: rgba(215,0,48,0.04); border-radius: 0 12px 12px 0;
  color: var(--gray); font-style: italic;
}
.entry-content table { width: 100%; border-collapse: collapse; margin: 36px 0; }
.entry-content table thead th {
  background: var(--red); color: var(--white);
  padding: 12px 16px; text-align: left; font-size: 0.875rem; font-weight: 600;
}
.entry-content table td {
  border-bottom: 1px solid var(--border); padding: 12px 16px;
  color: var(--gray); font-size: 0.9375rem;
}
.entry-content table tr:last-child td { border-bottom: none; }
.entry-content code {
  background: var(--surface); color: var(--red);
  padding: 2px 6px; border-radius: 4px; font-size: 0.875em;
}

/* ===== CTA BOX ===== */
.cta-box {
  margin: 56px 0; padding: 40px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-card); text-align: center;
  position: relative; overflow: hidden;
}
.cta-box::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--red), var(--red-deep));
}
.cta-box h3 { font-family: var(--font-heading); font-size: 1.25rem; color: var(--black); margin-bottom: 10px; }
.cta-box p { color: var(--gray); margin-bottom: 24px; max-width: 480px; margin-left: auto; margin-right: auto; margin-bottom: 24px; }
.cta-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, var(--red), var(--red-dark));
  color: var(--white); padding: 14px 28px;
  border-radius: var(--radius-btn); font-weight: 600;
  font-size: 0.9rem; letter-spacing: 0.01em;
  transition: all 300ms ease;
  box-shadow: 0 0 0 rgba(215,0,48,0);
}
.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 24px rgba(215,0,48,0.35);
  color: var(--white);
}

/* ===== CATEGORY HERO ===== */
.cat-hero { background: var(--surface); padding: 56px 24px 48px; border-bottom: 1px solid var(--border); }
.cat-hero-inner { max-width: 1120px; margin: 0 auto; }
.cat-label { font-size: 0.7rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--red); margin-bottom: 10px; }
.cat-hero h1 { font-family: var(--font-heading); font-size: 2rem; color: var(--black); }

/* ===== PAGINATION ===== */
.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 64px; }
.pagination a, .pagination span {
  width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); border-radius: 10px;
  color: var(--gray); font-size: 0.875rem; transition: all 200ms ease;
}
.pagination a:hover { border-color: var(--red); color: var(--red); }
.pagination .current { background: var(--red); border-color: var(--red); color: var(--white); }

/* ===== FOOTER ===== */
.site-footer {
  margin-top: 80px; padding: 56px 24px 32px;
  background: var(--black); color: rgba(255,255,255,0.6);
}
.footer-inner { max-width: 1120px; margin: 0 auto; }
.footer-top { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand .logo { font-family: var(--font-heading); font-size: 1.25rem; color: var(--white); margin-bottom: 12px; }
.footer-brand .logo .dot { color: var(--red); }
.footer-brand p { font-size: 0.875rem; line-height: 1.7; max-width: 260px; }
.footer-col h4 { font-size: 0.7rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(255,255,255,0.4); margin-bottom: 16px; }
.footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 0.875rem; margin-bottom: 10px; transition: color 200ms; }
.footer-col a:hover { color: var(--white); }
.footer-bottom { max-width: 1120px; margin: 28px auto 0; display: flex; justify-content: space-between; align-items: center; }
.footer-bottom p { font-size: 0.8rem; }
.footer-tagline { font-family: var(--font-heading); font-size: 0.8rem; color: var(--red); }

/* ===== UTILITY ===== */
.ktana-divider { width: 48px; height: 3px; background: linear-gradient(90deg, var(--red), var(--red-deep)); border-radius: 2px; margin: 0 auto 24px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .posts-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .site-nav .nav-cta { display: none; }
  .page-hero { padding: 56px 24px 48px; }
}
@media (max-width: 480px) {
  .site-nav a:not(.nav-cta) { display: none; }
}