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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: #f5f7fa;
  color: #1a1a2e;
  line-height: 1.7;
}

/* NAV */
nav {
  background: #1a1a2e;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.3);
}
.nav-inner {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.logo { color: #e2e8f0; font-weight: 700; font-size: 1.1rem; text-decoration: none; }
nav ul { list-style: none; display: flex; gap: 1.5rem; }
nav ul a { color: #a0aec0; text-decoration: none; font-size: .9rem; transition: color .2s; }
nav ul a:hover { color: #fff; }
.btn-nav {
  background: #4f46e5;
  color: #fff !important;
  padding: .35rem .9rem;
  border-radius: 6px;
  font-size: .85rem !important;
}

/* MAIN */
main { max-width: 900px; margin: 2.5rem auto; padding: 0 1.5rem; }

/* HERO */
.hero {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: #e2e8f0;
  padding: 3rem 2.5rem;
  border-radius: 12px;
  margin-bottom: 2.5rem;
}
.hero h1 { font-size: 1.9rem; margin-bottom: .6rem; }
.hero p { color: #94a3b8; font-size: 1.05rem; }

/* CARDS */
.posts h2 { margin-bottom: 1.2rem; color: #2d3748; }
.card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 1.4rem 1.6rem;
  margin-bottom: 1.2rem;
  transition: box-shadow .2s;
}
.card:hover { box-shadow: 0 4px 16px rgba(0,0,0,.08); }
.card h3 a { color: #4f46e5; text-decoration: none; }
.card h3 a:hover { text-decoration: underline; }
.meta { font-size: .82rem; color: #718096; margin: .3rem 0 .6rem; }

/* SINGLE POST */
.single-post {
  background: #fff;
  border-radius: 10px;
  padding: 2rem;
  border: 1px solid #e2e8f0;
}
.single-post h1 { margin-bottom: .5rem; }
.single-post .body { margin-top: 1.2rem; color: #4a5568; }

/* PROFILE */
.profile-card {
  background: #fff;
  border-radius: 10px;
  padding: 2rem;
  border: 1px solid #e2e8f0;
  max-width: 520px;
}
.profile-card h1 { margin-bottom: 1.2rem; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .6rem .8rem; border-bottom: 1px solid #f0f0f0; font-size: .9rem; }
th { width: 120px; color: #718096; font-weight: 500; }
.badge {
  background: #eef2ff;
  color: #4f46e5;
  padding: .2rem .6rem;
  border-radius: 4px;
  font-size: .8rem;
  font-weight: 600;
}

/* FILE VIEW */
.file-view { background: #fff; border-radius: 10px; padding: 2rem; border: 1px solid #e2e8f0; }
.file-view h1 { margin-bottom: 1rem; }
pre {
  background: #1a1a2e;
  color: #a8f7a0;
  padding: 1.2rem;
  border-radius: 8px;
  font-family: 'Courier New', monospace;
  font-size: .85rem;
  overflow-x: auto;
  white-space: pre-wrap;
}

/* ABOUT */
.about h1 { margin-bottom: 1rem; }
.about h2 { margin: 1.5rem 0 .5rem; }
.about ul { padding-left: 1.5rem; }

/* FOOTER */
footer {
  text-align: center;
  padding: 2rem;
  color: #718096;
  font-size: .85rem;
  margin-top: 3rem;
  border-top: 1px solid #e2e8f0;
}
footer a { color: #4f46e5; }