/* ===== CODEBOOK SOLUTION - MAIN CSS ===== */
/* Design: Dark industrial-tech aesthetic with neon accents */

:root {
  --bg: #0a0a0f;
  --bg2: #111118;
  --bg3: #1a1a24;
  --border: #2a2a3a;
  --accent: #00f5a0;
  --accent2: #00d4ff;
  --accent3: #ff6b35;
  --text: #e8e8f0;
  --text-muted: #888899;
  --red: #E63946;
  --yellow: #FFD166;
  --green: #06D6A0;
  --font-display: 'Syne', sans-serif;
  --font-mono: 'Space Mono', monospace;
  --font-body: 'Inter', sans-serif;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: all 0.2s; }
a:hover { opacity: 0.8; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.accent { color: var(--accent); }

/* ===== NAVBAR ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(10,10,15,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  transition: all 0.3s;
}
.navbar.scrolled { padding: 10px 0; box-shadow: 0 4px 30px rgba(0,245,160,0.05); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 10px; color: var(--text); font-family: var(--font-display); font-weight: 800; font-size: 1.4rem; }
.logo-icon { background: var(--accent); color: var(--bg); padding: 4px 8px; border-radius: 6px; font-family: var(--font-mono); font-size: 0.9rem; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { color: var(--text-muted); font-size: 0.9rem; font-weight: 500; letter-spacing: 0.02em; }
.nav-links a:hover { color: var(--text); opacity: 1; }
.nav-highlight { color: var(--accent) !important; }
.btn-nav-admin { background: var(--accent3); color: white !important; padding: 7px 18px; border-radius: 8px; font-size: 0.82rem !important; font-weight: 600 !important; }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); color: var(--text); padding: 8px 12px; border-radius: 8px; cursor: pointer; font-size: 1.2rem; }

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-block; background: var(--accent); color: var(--bg);
  padding: 13px 30px; border-radius: 10px; font-weight: 700; font-size: 0.95rem;
  font-family: var(--font-display); border: none; cursor: pointer;
  transition: all 0.2s; letter-spacing: 0.02em;
}
.btn-primary:hover { background: #00daa0; transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,245,160,0.3); opacity: 1; }

.btn-outline {
  display: inline-block; background: transparent; color: var(--text);
  padding: 12px 28px; border-radius: 10px; font-weight: 600; font-size: 0.95rem;
  border: 1.5px solid var(--border); cursor: pointer; transition: all 0.2s;
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); opacity: 1; transform: translateY(-2px); }

.btn-secondary {
  display: inline-block; background: var(--bg3); color: var(--text);
  padding: 10px 22px; border-radius: 8px; font-weight: 500; font-size: 0.9rem;
  border: 1px solid var(--border); cursor: pointer; transition: all 0.2s;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); opacity: 1; }

/* ===== HERO ===== */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  position: relative; overflow: hidden; padding-top: 80px;
}
.hero-bg-anim {
  position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(ellipse 800px 600px at 70% 50%, rgba(0,245,160,0.06) 0%, transparent 60%),
              radial-gradient(ellipse 600px 400px at 20% 80%, rgba(0,212,255,0.04) 0%, transparent 50%);
}
.hero-bg-anim::before {
  content: ''; position: absolute; inset: 0;
  background-image: linear-gradient(var(--border) 1px, transparent 1px),
                    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px; opacity: 0.3;
}
.hero-content { position: relative; z-index: 1; flex: 1; max-width: 580px; padding: 60px 0; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: var(--bg3); border: 1px solid var(--border); padding: 6px 16px; border-radius: 100px; font-size: 0.82rem; color: var(--text-muted); margin-bottom: 24px; }
.hero-badge .dot { width: 8px; height: 8px; background: var(--accent); border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.5;transform:scale(1.3)} }
.hero-title { font-family: var(--font-display); font-size: clamp(3rem, 6vw, 5rem); font-weight: 800; line-height: 1.05; margin-bottom: 20px; letter-spacing: -0.02em; }
.hero-sub { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 36px; letter-spacing: 0.05em; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 60px; }
.hero-stats { display: flex; gap: 40px; }
.stat { display: flex; flex-direction: column; }
.stat .num { font-family: var(--font-display); font-size: 2rem; font-weight: 800; color: var(--accent); line-height: 1; }
.stat .label { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }

.hero-code-preview {
  position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  width: 420px; z-index: 1;
}
.code-window { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,0.5); }
.code-titlebar { background: var(--bg3); padding: 12px 16px; display: flex; gap: 8px; align-items: center; font-size: 0.8rem; color: var(--text-muted); }
.code-titlebar span { width: 12px; height: 12px; border-radius: 50%; background: var(--border); }
.code-titlebar span:nth-child(1){background:#ff5f57} .code-titlebar span:nth-child(2){background:#ffbd2e} .code-titlebar span:nth-child(3){background:#28ca41}
.code-body { padding: 20px; font-family: var(--font-mono); font-size: 0.82rem; line-height: 1.8; overflow-x: auto; }
.code-body .kw { color: #c792ea; }
.code-body .fn { color: var(--accent2); }

/* ===== SERVICES STRIP ===== */
.services-strip { padding: 80px 0; }
.strip-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.strip-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: all 0.3s; }
.strip-card:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,245,160,0.08); }
.strip-card.highlight { border-color: rgba(0,245,160,0.3); background: linear-gradient(135deg, rgba(0,245,160,0.06) 0%, var(--bg2) 100%); }
.strip-icon { font-size: 2rem; margin-bottom: 14px; }
.strip-card h3 { font-family: var(--font-display); font-weight: 700; margin-bottom: 10px; font-size: 1.05rem; }
.strip-card p { color: var(--text-muted); font-size: 0.88rem; margin-bottom: 16px; line-height: 1.6; }
.strip-card a { font-size: 0.85rem; color: var(--accent); font-weight: 600; }

/* ===== DSA TEASER ===== */
.dsa-teaser { padding: 80px 0; background: var(--bg2); }
.dsa-teaser .container { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.section-label { font-size: 0.82rem; color: var(--accent); font-weight: 600; margin-bottom: 14px; letter-spacing: 0.08em; text-transform: uppercase; }
.teaser-left h2 { font-family: var(--font-display); font-size: 2.8rem; font-weight: 800; line-height: 1.1; margin-bottom: 18px; }
.teaser-left p { color: var(--text-muted); margin-bottom: 24px; line-height: 1.7; }
.teaser-list { list-style: none; margin-bottom: 32px; }
.teaser-list li { padding: 8px 0; color: var(--text-muted); font-size: 0.95rem; border-bottom: 1px solid var(--border); }
.teaser-list li:last-child { border-bottom: none; }
.topic-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.topic-card { background: var(--bg3); border: 1px solid var(--border); border-radius: 10px; padding: 16px 10px; text-align: center; color: var(--text); font-size: 0.82rem; font-weight: 600; transition: all 0.2s; display: flex; flex-direction: column; align-items: center; gap: 8px; }
.topic-card:hover { border-color: var(--accent,#00f5a0); background: rgba(0,245,160,0.05); transform: scale(1.05); color: var(--text); opacity: 1; }
.topic-icon { font-size: 1.6rem; }

/* ===== RECENT POSTS ===== */
.recent-section { padding: 80px 0; }
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 40px; }
.section-header h2 { font-family: var(--font-display); font-size: 2rem; font-weight: 800; }
.view-all { color: var(--accent); font-weight: 600; font-size: 0.9rem; }
.posts-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.post-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: all 0.3s; }
.post-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.post-tag { display: inline-block; background: rgba(0,245,160,0.1); color: var(--accent); padding: 4px 12px; border-radius: 100px; font-size: 0.75rem; font-weight: 600; margin-bottom: 12px; }
.post-card h3 { font-family: var(--font-display); font-weight: 700; margin-bottom: 10px; font-size: 1.05rem; line-height: 1.3; }
.post-card p { color: var(--text-muted); font-size: 0.88rem; margin-bottom: 16px; line-height: 1.6; }
.post-card a { color: var(--accent); font-size: 0.85rem; font-weight: 600; }

/* ===== CTA SECTION ===== */
.cta-section { padding: 80px 0; text-align: center; background: linear-gradient(135deg, rgba(0,245,160,0.05) 0%, rgba(0,212,255,0.03) 100%); border-top: 1px solid var(--border); }
.cta-section h2 { font-family: var(--font-display); font-size: 2.5rem; font-weight: 800; margin-bottom: 14px; }
.cta-section p { color: var(--text-muted); margin-bottom: 30px; }

/* ===== PAGE HERO ===== */
.page-hero { padding: 120px 0 60px; text-align: center; }
.page-hero h1 { font-family: var(--font-display); font-size: 3rem; font-weight: 800; margin-bottom: 16px; }
.page-hero p { color: var(--text-muted); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }

/* ===== DSA PAGE ===== */
.dsa-layout { display: grid; grid-template-columns: 280px 1fr; gap: 0; min-height: calc(100vh - 80px); padding-top: 80px; }
.dsa-sidebar { background: var(--bg2); border-right: 1px solid var(--border); padding: 30px 0; position: sticky; top: 80px; height: calc(100vh - 80px); overflow-y: auto; }
.sidebar-title { font-family: var(--font-display); font-weight: 700; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-muted); padding: 0 24px 16px; }
.sidebar-topic { display: block; padding: 10px 24px; color: var(--text-muted); font-size: 0.9rem; border-left: 3px solid transparent; transition: all 0.2s; }
.sidebar-topic:hover, .sidebar-topic.active { color: var(--accent); border-left-color: var(--accent); background: rgba(0,245,160,0.05); opacity: 1; }
.sidebar-topic .count { float: right; font-size: 0.75rem; background: var(--bg3); padding: 2px 8px; border-radius: 100px; color: var(--text-muted); }

.dsa-main { padding: 30px; }
.dsa-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; flex-wrap: wrap; gap: 12px; }
.dsa-header h2 { font-family: var(--font-display); font-size: 1.5rem; font-weight: 800; }
.dsa-filters { display: flex; gap: 10px; }
.filter-btn { background: var(--bg3); border: 1px solid var(--border); color: var(--text-muted); padding: 7px 16px; border-radius: 8px; cursor: pointer; font-size: 0.85rem; font-family: var(--font-body); transition: all 0.2s; }
.filter-btn.active, .filter-btn:hover { border-color: var(--accent); color: var(--accent); background: rgba(0,245,160,0.05); }
.filter-btn.easy.active { border-color: var(--green); color: var(--green); }
.filter-btn.medium.active { border-color: var(--yellow); color: var(--yellow); }
.filter-btn.hard.active { border-color: var(--red); color: var(--red); }

.dsa-table { width: 100%; border-collapse: collapse; }
.dsa-table thead tr { border-bottom: 2px solid var(--border); }
.dsa-table th { padding: 12px 16px; text-align: left; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); font-weight: 600; }
.dsa-table tbody tr { border-bottom: 1px solid rgba(255,255,255,0.04); transition: background 0.2s; }
.dsa-table tbody tr:hover { background: rgba(0,245,160,0.03); }
.dsa-table td { padding: 14px 16px; font-size: 0.9rem; vertical-align: middle; }
.q-title { color: var(--text); font-weight: 500; display: flex; align-items: center; gap: 8px; }
.q-title:hover { color: var(--accent); }
.badge-easy { background: rgba(6,214,160,0.15); color: var(--green); padding: 3px 10px; border-radius: 100px; font-size: 0.75rem; font-weight: 600; }
.badge-medium { background: rgba(255,209,102,0.15); color: var(--yellow); padding: 3px 10px; border-radius: 100px; font-size: 0.75rem; font-weight: 600; }
.badge-hard { background: rgba(230,57,70,0.15); color: var(--red); padding: 3px 10px; border-radius: 100px; font-size: 0.75rem; font-weight: 600; }

.action-btns { display: flex; gap: 8px; flex-wrap: wrap; }
.btn-solve { background: var(--accent); color: var(--bg); padding: 5px 14px; border-radius: 7px; font-size: 0.78rem; font-weight: 700; white-space: nowrap; }
.btn-solve:hover { opacity: 0.85; }
.btn-video { background: var(--bg3); border: 1px solid var(--border); color: #ff4444; padding: 5px 14px; border-radius: 7px; font-size: 0.78rem; font-weight: 600; display: flex; align-items: center; gap: 5px; white-space: nowrap; }
.btn-video:hover { border-color: #ff4444; background: rgba(255,68,68,0.1); opacity: 1; }

/* ===== COMPILER PAGE ===== */
.compiler-page { padding-top: 80px; min-height: 100vh; }
.compiler-toolbar { background: var(--bg2); border-bottom: 1px solid var(--border); padding: 12px 24px; display: flex; align-items: center; justify-content: space-between; position: sticky; top: 80px; z-index: 100; }
.compiler-title { font-family: var(--font-display); font-weight: 700; font-size: 1rem; }
.toolbar-controls { display: flex; align-items: center; gap: 12px; }
.lang-select { background: var(--bg3); border: 1px solid var(--border); color: var(--text); padding: 7px 14px; border-radius: 8px; font-family: var(--font-mono); font-size: 0.85rem; cursor: pointer; }
.btn-run { background: var(--accent); color: var(--bg); border: none; padding: 8px 24px; border-radius: 8px; font-weight: 700; font-size: 0.9rem; cursor: pointer; font-family: var(--font-display); display: flex; align-items: center; gap: 8px; }
.btn-run:hover { opacity: 0.88; }
.btn-clear { background: transparent; border: 1px solid var(--border); color: var(--text-muted); padding: 7px 16px; border-radius: 8px; cursor: pointer; font-size: 0.85rem; }

.compiler-body { display: grid; grid-template-columns: 1fr 1fr; height: calc(100vh - 152px); }
.editor-pane { border-right: 1px solid var(--border); display: flex; flex-direction: column; }
.pane-header { background: var(--bg3); padding: 10px 16px; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); font-weight: 600; border-bottom: 1px solid var(--border); }
#codeEditor {
  flex: 1; background: var(--bg); color: var(--text); border: none; outline: none;
  font-family: var(--font-mono); font-size: 14px; line-height: 1.8; padding: 20px;
  resize: none; width: 100%; tab-size: 2;
}
.output-pane { display: flex; flex-direction: column; }
.output-body { flex: 1; padding: 20px; font-family: var(--font-mono); font-size: 13px; line-height: 1.8; overflow-y: auto; color: var(--text); white-space: pre-wrap; }
.output-body.error { color: #ff6b6b; }
.output-body.success { color: var(--accent); }
.stdin-area { border-top: 1px solid var(--border); padding: 12px 16px; }
.stdin-area textarea { width: 100%; background: var(--bg3); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 10px; font-family: var(--font-mono); font-size: 13px; resize: none; outline: none; height: 80px; }

/* ===== SERVICES PAGE ===== */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; padding: 60px 0; }
.service-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px; transition: all 0.3s; }
.service-card:hover { border-color: var(--accent); transform: translateY(-5px); }
.service-card .icon { font-size: 3rem; margin-bottom: 20px; }
.service-card h3 { font-family: var(--font-display); font-size: 1.3rem; font-weight: 800; margin-bottom: 14px; }
.service-card p { color: var(--text-muted); line-height: 1.7; margin-bottom: 20px; }
.service-card ul { list-style: none; }
.service-card ul li { color: var(--text-muted); padding: 6px 0; font-size: 0.9rem; border-bottom: 1px solid var(--border); }
.service-card ul li:last-child { border-bottom: none; }
.service-card ul li::before { content: '→ '; color: var(--accent); }

/* ===== BLOG ===== */
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; padding: 60px 0; }
.blog-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: all 0.3s; }
.blog-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.blog-img { height: 180px; background: var(--bg3); display: flex; align-items: center; justify-content: center; font-size: 3rem; }
.blog-body { padding: 24px; }
.blog-meta { display: flex; gap: 12px; margin-bottom: 12px; align-items: center; }
.blog-body h3 { font-family: var(--font-display); font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; line-height: 1.3; }
.blog-body p { color: var(--text-muted); font-size: 0.87rem; margin-bottom: 16px; }

/* ===== CONTACT FORM ===== */
.contact-layout { display: grid; grid-template-columns: 1fr 1.5fr; gap: 60px; padding: 60px 0; }
.contact-info h3 { font-family: var(--font-display); font-size: 1.5rem; font-weight: 800; margin-bottom: 20px; }
.contact-info p { color: var(--text-muted); margin-bottom: 30px; line-height: 1.7; }
.contact-item { display: flex; gap: 14px; margin-bottom: 20px; align-items: flex-start; }
.c-icon { font-size: 1.4rem; width: 40px; }
.c-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 2px; }
.c-val { font-weight: 500; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-size: 0.88rem; color: var(--text-muted); font-weight: 500; }
.form-control { width: 100%; background: var(--bg2); border: 1px solid var(--border); color: var(--text); padding: 12px 16px; border-radius: 10px; font-family: var(--font-body); font-size: 0.95rem; outline: none; transition: border-color 0.2s; }
.form-control:focus { border-color: var(--accent); }
textarea.form-control { min-height: 140px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ===== ADMIN ===== */
.admin-layout { display: grid; grid-template-columns: 260px 1fr; min-height: 100vh; }
.admin-sidebar { background: var(--bg2); border-right: 1px solid var(--border); padding: 24px 0; }
.admin-logo { padding: 0 24px 24px; border-bottom: 1px solid var(--border); margin-bottom: 16px; }
.admin-nav a { display: flex; align-items: center; gap: 12px; padding: 12px 24px; color: var(--text-muted); font-size: 0.9rem; transition: all 0.2s; }
.admin-nav a:hover, .admin-nav a.active { color: var(--text); background: rgba(0,245,160,0.05); border-left: 3px solid var(--accent); padding-left: 21px; opacity: 1; }
.admin-main { padding: 30px; background: var(--bg); }
.admin-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 30px; }
.admin-header h1 { font-family: var(--font-display); font-size: 1.6rem; font-weight: 800; }
.stats-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 30px; }
.stat-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.stat-card .s-num { font-family: var(--font-display); font-size: 2.2rem; font-weight: 800; color: var(--accent); }
.stat-card .s-label { color: var(--text-muted); font-size: 0.85rem; margin-top: 4px; }
.admin-table { width: 100%; border-collapse: collapse; background: var(--bg2); border-radius: var(--radius); overflow: hidden; }
.admin-table th { background: var(--bg3); padding: 12px 16px; text-align: left; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); }
.admin-table td { padding: 13px 16px; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover td { background: rgba(0,245,160,0.02); }
.action-link { color: var(--accent); font-size: 0.82rem; font-weight: 600; }
.action-delete { color: var(--red); font-size: 0.82rem; font-weight: 600; }
.form-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; max-width: 800px; }
.admin-login { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--bg); }
.login-card { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 40px; width: 400px; }
.login-card h2 { font-family: var(--font-display); font-weight: 800; font-size: 1.6rem; margin-bottom: 8px; }
.login-card p { color: var(--text-muted); margin-bottom: 28px; }
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 20px; font-size: 0.9rem; }
.alert-error { background: rgba(230,57,70,0.15); color: var(--red); border: 1px solid rgba(230,57,70,0.3); }
.alert-success { background: rgba(6,214,160,0.15); color: var(--green); border: 1px solid rgba(6,214,160,0.3); }

/* ===== FOOTER ===== */
.site-footer { background: var(--bg2); border-top: 1px solid var(--border); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand p { color: var(--text-muted); font-size: 0.88rem; margin: 16px 0 24px; line-height: 1.7; }
.social-links { display: flex; gap: 14px; flex-wrap: wrap; }
.social-links a { color: var(--text-muted); font-size: 0.85rem; padding: 6px 14px; border: 1px solid var(--border); border-radius: 8px; transition: all 0.2s; }
.social-links a:hover { border-color: var(--accent); color: var(--accent); opacity: 1; }
.footer-col h4 { font-family: var(--font-display); font-weight: 700; margin-bottom: 18px; font-size: 0.95rem; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: var(--text-muted); font-size: 0.88rem; }
.footer-col ul li a:hover { color: var(--accent); opacity: 1; }
.footer-bottom { border-top: 1px solid var(--border); padding: 20px 0; text-align: center; }
.footer-bottom p { color: var(--text-muted); font-size: 0.85rem; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-code-preview { display: none; }
  .strip-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .dsa-teaser .container { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .compiler-body { grid-template-columns: 1fr; height: auto; }
  .dsa-layout { grid-template-columns: 1fr; }
  .dsa-sidebar { display: none; }
}
@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: var(--bg2); border-bottom: 1px solid var(--border); padding: 20px; gap: 16px; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .strip-grid, .posts-grid, .services-grid, .blog-grid { grid-template-columns: 1fr; }
  .contact-layout, .admin-layout { grid-template-columns: 1fr; }
  .stats-cards { grid-template-columns: repeat(2,1fr); }
  .form-row { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; }
  .topic-grid { grid-template-columns: repeat(4,1fr); }
}