:root {
  --bg: #08111d;
  --panel: #0f1d2c;
  --panel-alt: #12253a;
  --surface: #f4f7fb;
  --surface-2: #ecf2f9;
  --text: #e7edf6;
  --text-strong: #0a1623;
  --muted: #7d8ea7;
  --primary: #6ee7f9;
  --primary-2: #8b5cf6;
  --accent: #2dd4bf;
  --border: rgba(187, 196, 211, 0.18);
  --shadow: 0 24px 60px rgba(11, 17, 32, 0.25);
  --radius: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: linear-gradient(180deg, #040b14 0%, #091a2d 100%);
  color: var(--text);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea, select { font: inherit; }
.container {
  width: min(1180px, calc(100% - 24px));
  margin: 0 auto;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(8, 17, 29, 0.8);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 80px;
  gap: 16px;
}
.brand {
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
  font-weight: 800;
  letter-spacing: 0.08em;
}
.brand-top, .brand-bottom { display: block; }
.brand-top { font-size: 0.7rem; }
.brand-bottom { font-size: 1.1rem; }
.main-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}
.nav-link {
  color: rgba(231, 237, 246, 0.8);
  font-size: 0.94rem;
}
.nav-link.active, .nav-link:hover { color: var(--primary); }
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.header-search input {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  padding: 10px 14px;
  min-width: 200px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 999px;
  padding: 12px 20px;
  cursor: pointer;
  transition: 0.2s ease;
  font-weight: 600;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(90deg, var(--primary), var(--primary-2));
  color: #04111e;
}
.btn-secondary {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--text);
}
.menu-toggle { display: none; background: transparent; border: 1px solid var(--border); color: var(--text); border-radius: 10px; padding: 8px 10px; }

.page-shell { min-height: 70vh; }
.section { padding: 90px 0; }
.hero {
  padding-top: 80px;
  padding-bottom: 70px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}
.kicker { color: var(--primary); font-weight: 700; text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.74rem; }
h1, h2, h3, h4 { margin-top: 0; }
.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4.7rem);
  line-height: 0.96;
  margin: 18px 0 16px;
}
.hero p { color: rgba(231,237,246,0.75); font-size: 1.1rem; line-height: 1.7; }
.hero-actions { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }
.hero-visual {
  background: linear-gradient(135deg, rgba(110,231,249,0.13), rgba(139,92,246,0.2));
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 24px;
  box-shadow: var(--shadow);
}
.code-window {
  background: rgba(4, 11, 20, 0.8);
  border-radius: 20px;
  padding: 18px;
  border: 1px solid rgba(255,255,255,0.08);
}
.window-bar { display: flex; gap: 8px; margin-bottom: 16px; }
.window-dot { width: 10px; height: 10px; border-radius: 50%; }
.window-dot:nth-child(1){background:#ff5f57} .window-dot:nth-child(2){background:#febc2e} .window-dot:nth-child(3){background:#28c840}
.code-block {
  background: rgba(255,255,255,0.03);
  border-radius: 14px;
  padding: 18px;
  font-family: "Consolas", monospace;
  color: var(--primary);
  line-height: 1.7;
}
.section-head {
  max-width: 700px;
  margin-bottom: 32px;
}
.section-head h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 12px;
}
.muted { color: var(--muted); }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; }
.card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.card-body { padding: 20px; }
.idea-card .card-image, .article-card .card-image, .project-card .card-image {
  height: 210px;
  background: linear-gradient(135deg, rgba(110,231,249,0.18), rgba(139,92,246,0.35));
}
.badge {
  display: inline-block;
  padding: 7px 10px;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  background: rgba(110,231,249,0.12);
  color: var(--primary);
}
.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.83rem;
}
.card h3 { margin: 16px 0 10px; font-size: 1.3rem; }
.card p { color: rgba(231,237,246,0.76); line-height: 1.7; }
.link-arrow { color: var(--primary); font-weight: 700; }
.category-pills { display: flex; flex-wrap: wrap; gap: 10px; }
.category-pill {
  display: inline-flex;
  align-items: center;
  padding: 12px 16px;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  font-weight: 600;
}
.feature-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; }
.feature-box {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
}
.landing-cta {
  background: linear-gradient(135deg, rgba(109, 225, 240, 0.08), rgba(139,92,246,0.1));
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 36px;
}
.article-hero, .detail-page {
  max-width: 900px;
  margin: 0 auto;
  padding: 60px 0 100px;
}
.detail-section {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.detail-meta { display: flex; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: 0.9rem; }
.content-body { color: rgba(231,237,246,0.82); line-height: 1.9; }
.content-body h2, .content-body h3 { color: #fff; margin-top: 28px; }
.content-body code {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2px 8px;
}
.related-list { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.search-results { padding: 60px 0 100px; }
.result-group { margin-bottom: 32px; }
.result-item { padding: 18px 20px; border-bottom: 1px solid var(--border); }
.form-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  max-width: 780px;
  margin: 0 auto;
}
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 20px; }
label { display: block; margin-bottom: 8px; color: var(--muted); }
input, textarea, select {
  width: 100%;
  padding: 12px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
}
textarea { min-height: 140px; resize: vertical; }
.form-actions { margin-top: 18px; }
.alert { padding: 12px 16px; border-radius: 12px; margin-bottom: 18px; }
.alert-success { background: rgba(45,212,191,0.14); border: 1px solid rgba(45,212,191,0.35); color: #bffcf7; }
.alert-error { background: rgba(255,95,87,0.12); border: 1px solid rgba(255,95,87,0.35); color: #ffd8d6; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
  gap: 18px;
  padding: 40px 0 20px;
}
.site-footer {
  border-top: 1px solid var(--border);
  background: rgba(5, 11, 18, 0.9);
}
.footer-links { list-style: none; padding: 0; margin: 12px 0 0; display: grid; gap: 10px; color: rgba(231,237,246,0.7); }
.footer-bottom { border-top: 1px solid var(--border); padding: 18px 0 36px; color: var(--muted); }

.admin-body { background: #091724; }
.admin-shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}
.admin-panel {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
}
.admin-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; }
.stat-box {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  padding: 20px;
  border-radius: 18px;
}
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 12px 10px; border-bottom: 1px solid var(--border); text-align: left; }
.table th { color: var(--muted); font-weight: 600; }
.table-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.small-btn { padding: 8px 12px; border-radius: 10px; font-size: 0.85rem; }
.login-box {
  max-width: 500px;
  margin: 80px auto;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
}

@media (max-width: 900px) {
  .hero-grid, .grid-3, .feature-list, .grid-2, .footer-grid, .admin-grid { grid-template-columns: 1fr; }
  .main-nav {
    position: absolute;
    top: 80px;
    left: 12px;
    right: 12px;
    background: rgba(8,17,29,0.96);
    padding: 16px;
    border-radius: 16px;
    border: 1px solid var(--border);
    display: none;
    flex-direction: column;
    align-items: flex-start;
  }
  .main-nav.open { display: flex; }
  .menu-toggle { display: block; }
  .header-search { display: none; }
}

@media (max-width: 580px) {
  .hero h1 { font-size: 2.5rem; }
  .form-grid { grid-template-columns: 1fr; }
  .header-actions .btn { display: none; }
}