:root {
  --bg: #f7f7fb;
  --bg-alt: #ffffff;
  --text: #1a1a2e;
  --muted: #6b6b80;
  --accent: #6c5ce7;
  --border: #e6e6ef;
  --shadow: 0 4px 20px rgba(0,0,0,0.06);
}

body.dark {
  --bg: #14141f;
  --bg-alt: #1e1e2e;
  --text: #f0f0f5;
  --muted: #a0a0b5;
  --accent: #a29bfe;
  --border: #2a2a3e;
  --shadow: 0 4px 20px rgba(0,0,0,0.4);
}

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

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background 0.3s, color 0.3s;
}

.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }

/* Header */
header {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.logo {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--accent);
  text-decoration: none;
}

nav { display: flex; gap: 20px; flex-wrap: wrap; }
nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}
nav a:hover, nav a.active { color: var(--accent); }

.theme-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px; height: 40px;
  cursor: pointer;
  font-size: 1.1rem;
  transition: transform 0.2s;
}
.theme-btn:hover { transform: scale(1.1); }

/* Hero */
.hero {
  text-align: center;
  padding: 80px 20px 60px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 16px;
}
.accent { color: var(--accent); }
.lead {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto 28px;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border: none;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, opacity 0.2s;
}
.btn:hover { transform: translateY(-2px); opacity: 0.92; }

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  padding-bottom: 60px;
}
.card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}
.card:hover { transform: translateY(-4px); }
.card h3 { margin-bottom: 10px; }

/* Page */
.page { padding: 60px 20px; }
.page h1 { font-size: 2.2rem; margin-bottom: 12px; }
.page h2 { margin: 24px 0 10px; font-size: 1.3rem; }

.list { padding-left: 20px; color: var(--muted); }
.list li { margin-bottom: 6px; }

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 32px;
  align-items: start;
  margin-top: 24px;
}
.avatar-box {
  font-size: 8rem;
  text-align: center;
  background: var(--bg-alt);
  border-radius: 20px;
  padding: 40px;
  border: 1px solid var(--border);
}

/* Posts */
.posts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 28px;
}
.post {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}
.post:hover { transform: translateY(-4px); }
.post h3 { margin: 10px 0; font-size: 1.15rem; }
.post p { color: var(--muted); margin-bottom: 12px; font-size: 0.95rem; }
.post a { color: var(--accent); text-decoration: none; font-weight: 600; }

.tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 3px 10px;
  background: var(--accent);
  color: #fff;
  border-radius: 20px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Form */
.form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 560px;
  margin-top: 24px;
}
.form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-weight: 500;
}
.form input, .form textarea {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-alt);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s;
}
.form input:focus, .form textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-msg { color: #27ae60; font-weight: 600; }

.socials {
  margin-top: 40px;
  color: var(--muted);
}
.socials a { color: var(--accent); text-decoration: none; }

/* Footer */
footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

/* Mobile */
@media (max-width: 640px) {
  .about-grid { grid-template-columns: 1fr; }
  .nav-wrap { justify-content: center; }
}

/* ===== Страница статьи ===== */
.article {
  max-width: 760px;
}

.article h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 12px 0 8px;
  line-height: 1.2;
}

.article .meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 28px;
}

.article h2 {
  font-size: 1.4rem;
  margin: 32px 0 12px;
  color: var(--text);
}

.article p {
  margin-bottom: 16px;
  font-size: 1.05rem;
  line-height: 1.75;
}

.article em {
  color: var(--accent);
  font-style: italic;
}

.article blockquote {
  border-left: 4px solid var(--accent);
  padding: 12px 20px;
  margin: 24px 0;
  background: var(--bg-alt);
  border-radius: 0 12px 12px 0;
  font-style: italic;
  color: var(--muted);
}

.article .list {
  margin-bottom: 20px;
  padding-left: 22px;
}
.article .list li {
  margin-bottom: 8px;
  font-size: 1.02rem;
}

/* Ссылка "назад" */
.back-link {
  display: inline-block;
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  margin-bottom: 20px;
  transition: color 0.2s, transform 0.2s;
}
.back-link:hover {
  color: var(--accent);
  transform: translateX(-3px);
}

/* Активная ссылка "Статьи" в шапке */
nav a.active { color: var(--accent); }