/* Современный дизайн: Linear / Vercel / Ghost */

:root, [data-theme="dark"] {
  --bg: #0a0f14;
  --bg-2: #0f1620;
  --bg-3: #141d29;
  --card: rgba(22, 49, 56, 0.4);
  --card-hover: rgba(22, 49, 56, 0.7);
  --accent: #4fd1c5;
  --accent-glow: rgba(79, 209, 197, 0.3);
  --accent-2: #f6ad55;
  --text: #e6f4f1;
  --text-muted: #8ba8a3;
  --border: rgba(79, 209, 197, 0.12);
  --border-hover: rgba(79, 209, 197, 0.4);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-serif: 'Georgia', 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
}

/* ============ СВЕТЛАЯ ТЕМА ============ */
[data-theme="light"] {
  --bg: #f7f9fb;
  --bg-2: #eef2f6;
  --bg-3: #e3e9ee;
  --card: rgba(255, 255, 255, 0.85);
  --card-hover: rgba(255, 255, 255, 1);
  --accent: #0d9488;
  --accent-glow: rgba(13, 148, 136, 0.25);
  --accent-2: #ea7c1f;
  --text: #14293a;
  --text-muted: #5a7280;
  --border: rgba(13, 148, 136, 0.15);
  --border-hover: rgba(13, 148, 136, 0.4);
}

[data-theme="light"] body {
  background-image:
    radial-gradient(circle at 15% 15%, rgba(13, 148, 136, 0.08), transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(234, 124, 31, 0.06), transparent 40%);
}

[data-theme="light"] header {
  background: rgba(247, 249, 251, 0.85);
}

[data-theme="light"] .mobile-menu {
  background: rgba(247, 249, 251, 0.98) !important;
}

[data-theme="light"] .post-body code,
[data-theme="light"] .post-body pre {
  background: #1e1e2e;
  color: #e6f4f1;
}

[data-theme="light"] .post-body pre code {
  color: #e6f4f1;
}

[data-theme="light"] .post-body .codehilite {
  background: #1e1e2e;
}

[data-theme="light"] .post-body .codehilite pre code {
  color: #e6f4f1;
}

/* Кнопка переключения темы */
.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 42px;
  height: 42px;
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color .2s, background .2s, transform .3s;
  flex-shrink: 0;
  color: var(--text);
}
.theme-toggle:hover {
  border-color: var(--accent);
  background: rgba(79, 209, 197, 0.05);
  transform: rotate(20deg);
}

@media (max-width: 900px) {
  .theme-toggle {
    width: 38px;
    height: 38px;
    font-size: 18px;
  }
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
  -webkit-font-smoothing: antialiased;
}

/* Анимированный фон-градиент */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(600px circle at 15% 15%, rgba(79,209,197,0.10), transparent 45%),
    radial-gradient(600px circle at 85% 80%, rgba(246,173,85,0.06), transparent 45%),
    radial-gradient(900px circle at 50% 50%, rgba(79,209,197,0.02), transparent 70%);
  animation: bgShift 30s ease-in-out infinite;
  pointer-events: none;
}

@keyframes bgShift {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-20px, 10px); }
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ===== HEADER (glassmorphism) ===== */
header {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  background: rgba(10, 15, 20, 0.75);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  z-index: 100;
  transition: var(--transition);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.logo {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: bold;
  color: var(--accent);
  letter-spacing: 0.5px;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.logo:hover { transform: translateY(-1px); }
.logo span { color: var(--accent-2); }

nav ul {
  display: flex;
  gap: 4px;
  list-style: none;
  align-items: center;
  flex-wrap: wrap;
}

nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

nav a:hover {
  color: var(--accent);
  background: rgba(79, 209, 197, 0.08);
}

nav a.cta {
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
}

nav a.cta:hover {
  background: var(--accent-2);
  color: var(--bg);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

/* ===== CARDS ===== */
.card {
  background: var(--card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s;
}

.card:hover {
  background: var(--card-hover);
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow:
    0 20px 40px rgba(0, 0, 0, 0.4),
    0 0 0 1px var(--border-hover),
    0 0 40px -10px var(--accent-glow);
}

.card:hover::before { transform: translateX(100%); }

/* ===== RUBRIC BADGES ===== */
.rubric {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(246, 173, 85, 0.12);
  color: var(--accent-2);
  padding: 5px 12px;
  border-radius: 8px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  border: 1px solid rgba(246, 173, 85, 0.2);
}

/* ===== BUTTONS ===== */
.btn {
  padding: 12px 24px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  font-family: var(--font-sans);
  position: relative;
  overflow: hidden;
}

.btn:hover {
  background: var(--accent-2);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px var(--accent-glow);
}

.btn:active { transform: translateY(0); }

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.btn-outline:hover {
  background: rgba(79, 209, 197, 0.1);
  color: var(--accent);
}

/* ===== FOOTER ===== */
footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
  margin-top: 80px;
}

footer a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}

footer a:hover { color: var(--accent-2); }

/* ===== ANIMATIONS ===== */
.fade-in {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== SCROLL TO TOP ===== */
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 20px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  z-index: 50;
  box-shadow: 0 8px 24px var(--accent-glow);
}

.scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.scroll-top:hover {
  background: var(--accent-2);
  transform: translateY(-4px) scale(1.1);
}

/* ===== MOBILE ===== */
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  nav ul { gap: 2px; }
  nav a { padding: 6px 10px; font-size: 13px; }
  .card { padding: 20px; }
}





/* ============ МОБИЛЬНОЕ БУРГЕР-МЕНЮ ============ */
.burger {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 42px;
  height: 42px;
  cursor: pointer;
  padding: 0;
  position: relative;
  transition: border-color .2s, background .2s;
  flex-shrink: 0;
}
.burger:hover {
  border-color: var(--accent);
  background: rgba(79, 209, 197, 0.05);
}
.burger span {
  display: block;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: all .25s ease;
}
.burger span:nth-child(1) { top: 13px; }
.burger span:nth-child(2) { top: 20px; }
.burger span:nth-child(3) { top: 27px; }

.burger.open span:nth-child(1) {
  top: 20px;
  transform: translateX(-50%) rotate(45deg);
}
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) {
  top: 20px;
  transform: translateX(-50%) rotate(-45deg);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 73px;
  left: 0;
  right: 0;
  background: rgba(13, 27, 30, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 8px 0;
  z-index: 99;
  max-height: calc(100vh - 73px);
  overflow-y: auto;
}
.mobile-menu.open {
  display: block;
}
.mobile-menu ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.mobile-menu li {
  border-bottom: 1px solid var(--border);
}
.mobile-menu li:last-child {
  border-bottom: none;
}
.mobile-menu a {
  display: block;
  padding: 14px 24px;
  color: var(--text);
  text-decoration: none;
  font-size: 16px;
  font-family: 'Segoe UI', sans-serif;
  transition: background .2s, color .2s;
}
.mobile-menu a:hover,
.mobile-menu a:active {
  background: rgba(79, 209, 197, 0.08);
  color: var(--accent);
}
.mobile-menu .admin-link {
  color: var(--accent-2) !important;
}

.mobile-overlay {
  display: none;
  position: fixed;
  top: 73px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 98;
}
.mobile-overlay.open {
  display: block;
}

/* Показываем бургер только на мобильных */
@media (max-width: 900px) {
  .nav > nav > ul { display: none !important; }
  .burger { display: block; }
  .nav { gap: 12px; }
}
@media (min-width: 901px) {
  .burger { display: none !important; }
  .mobile-menu { display: none !important; }
  .mobile-overlay { display: none !important; }
}