/* ===== Базовые переменные ===== */
:root {
  --bg: #0e1116;
  --bg-soft: #151a22;
  --card: #1a212c;
  --border: #273041;
  --text: #e8ecf3;
  --muted: #9aa6b8;
  --accent: #5b9dff;
  --accent-soft: rgba(91, 157, 255, .12);
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
  --radius: 14px;
}

[data-theme="light"] {
  --bg: #f5f7fb;
  --bg-soft: #ffffff;
  --card: #ffffff;
  --border: #e2e7f0;
  --text: #1b2330;
  --muted: #5d6a7e;
  --accent: #2f6fed;
  --accent-soft: rgba(47, 111, 237, .10);
  --shadow: 0 10px 30px rgba(30, 45, 80, .08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  transition: background .25s ease, color .25s ease;
}

.container { width: min(1080px, 92%); margin: 0 auto; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== Шапка ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .8rem 0;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: .5px;
  color: var(--text);
}
.logo:hover { text-decoration: none; }
.logo span { color: var(--accent); }

.nav { display: flex; gap: 1.4rem; }
.nav a { color: var(--muted); font-weight: 500; font-size: .95rem; }
.nav a:hover { color: var(--text); text-decoration: none; }

.header-actions { display: flex; align-items: center; gap: .5rem; }

.icon-btn {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1.05rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color .2s ease, transform .2s ease;
}
.icon-btn:hover { border-color: var(--accent); transform: translateY(-1px); }

.nav-toggle { display: none; }

/* ===== Главный экран ===== */
.hero { padding: 4rem 0 2.5rem; text-align: center; }

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: .18em;
  font-size: .72rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  padding: .35rem .8rem;
  border-radius: 999px;
  margin-bottom: 1.2rem;
}

.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.15; margin: 0 0 1rem; }

.lead { color: var(--muted); max-width: 640px; margin: 0 auto; font-size: 1.08rem; }

/* ===== Карточки записей ===== */
.posts { padding: 1rem 0 4rem; }
.posts h2 { font-size: 1.6rem; margin: 0 0 1.4rem; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.4rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: var(--shadow);
  transition: transform .2s ease, border-color .2s ease;
  display: flex;
  flex-direction: column;
  gap: .7rem;
}
.card:hover { transform: translateY(-4px); border-color: var(--accent); }

.card .tag {
  font-size: .75rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: .1em;
}

.card h3 { font-size: 1.2rem; line-height: 1.35; margin: 0; }

.card p { color: var(--muted); font-size: .95rem; flex: 1; margin: 0; }

.card .meta {
  font-size: .8rem;
  color: var(--muted);
  display: flex;
  gap: .8rem;
  border-top: 1px solid var(--border);
  padding-top: .7rem;
}

/* ===== Внутренние страницы ===== */
.page-hero { padding: 3.5rem 0 1.5rem; }
.page-hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin: 0; }

.prose { max-width: 760px; padding-bottom: 4rem; }
.prose h2 { margin: 1.8rem 0 .8rem; font-size: 1.3rem; }
.prose p { color: var(--muted); margin: .8rem 0; }
.prose ul { color: var(--muted); padding-left: 1.2rem; }
.prose li { margin: .4rem 0; }

/* ===== Подвал ===== */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 2rem 0;
  margin-top: 2rem;
}
.site-footer p { margin: .2rem 0; font-size: .9rem; color: var(--muted); }

/* ===== Адаптивность ===== */
@media (max-width: 720px) {
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-soft);
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height .25s ease;
  }
  .nav.open { max-height: 280px; }
  .nav a { padding: .9rem 5%; border-top: 1px solid var(--border); }
  .nav-toggle { display: inline-flex; }
  .hero { padding: 3rem 0 2rem; }
}