:root {
  --bg: #0f0f0f;
  --bg-card: #161622;
  --bg-card-2: #1e1e2e;
  --accent: #e11d48;
  --accent-hover: #be123c;
  --gold: #f59e0b;
  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --border: #2d2d44;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; }

/* Header */
header { background: #0a0a0f; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.header-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; height: 64px; display: flex; align-items: center; justify-content: space-between; }
.logo { text-decoration: none; color: var(--text); font-size: 1.25rem; font-weight: 800; letter-spacing: -0.02em; display: flex; align-items: center; gap: 4px; }
.logo span { color: var(--accent); }
nav { display: flex; gap: 24px; }
nav a { color: var(--text-secondary); text-decoration: none; font-size: 0.9rem; transition: color 0.2s; }
nav a:hover { color: var(--text); }

/* Hero */
.hero { text-align: center; padding: 80px 24px 60px; background: linear-gradient(180deg, #0a0a1a 0%, var(--bg) 100%); }
.hero h1 { font-size: 3rem; font-weight: 800; margin-bottom: 16px; background: linear-gradient(135deg, #fff 0%, var(--accent) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { font-size: 1.15rem; color: var(--text-secondary); max-width: 580px; margin: 0 auto 40px; }
.hero-stats { display: flex; gap: 48px; justify-content: center; flex-wrap: wrap; }
.hero-stat .num { font-size: 2rem; font-weight: 700; color: var(--accent); }
.hero-stat .lbl { font-size: 0.82rem; color: var(--text-secondary); margin-top: 2px; }

/* Sections */
.section { max-width: 1200px; margin: 0 auto; padding: 48px 24px; }
.section-header { margin-bottom: 28px; }
.section-title { font-size: 1.4rem; font-weight: 700; margin-bottom: 6px; }
.section-subtitle { color: var(--text-secondary); font-size: 0.9rem; }

/* Calculator grid */
.calc-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 16px; }
.calc-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; text-decoration: none; color: var(--text); transition: all 0.2s; display: block; }
.calc-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 8px 32px rgba(225,29,72,0.12); }
.calc-card .icon { font-size: 2rem; margin-bottom: 12px; display: block; }
.calc-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 6px; }
.calc-card p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.5; }
.badge { display: inline-block; font-size: 0.68rem; padding: 2px 8px; border-radius: 20px; margin-top: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; }
.badge-hot { background: rgba(225,29,72,0.15); color: var(--accent); }
.badge-new { background: rgba(245,158,11,0.12); color: var(--gold); }
.badge-viral { background: rgba(139,92,246,0.15); color: #a78bfa; }

/* Calculator page */
.calc-page-wrapper { max-width: 1200px; margin: 0 auto; padding: 32px 24px; display: grid; grid-template-columns: 1fr 320px; gap: 32px; align-items: start; }
@media (max-width: 900px) { .calc-page-wrapper { grid-template-columns: 1fr; } }
.breadcrumb { font-size: 0.82rem; color: var(--text-secondary); margin-bottom: 24px; }
.breadcrumb a { color: var(--text-secondary); text-decoration: none; }
.breadcrumb a:hover { color: var(--text); }
.breadcrumb span { margin: 0 6px; }
.calc-hero { margin-bottom: 28px; }
.calc-hero h1 { font-size: 2rem; font-weight: 800; margin-bottom: 10px; }
.calc-hero p { color: var(--text-secondary); font-size: 0.95rem; max-width: 560px; }

/* Form */
.calc-form-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; margin-bottom: 24px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.875rem; font-weight: 600; margin-bottom: 8px; color: var(--text); }
.form-group input, .form-group select { width: 100%; padding: 12px 16px; background: var(--bg-card-2); border: 1px solid var(--border); border-radius: 8px; color: var(--text); font-size: 1rem; outline: none; transition: border-color 0.2s; -webkit-appearance: none; }
.form-group input:focus, .form-group select:focus { border-color: var(--accent); }
.form-group select option { background: #1e1e2e; color: var(--text); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }
.form-hint { font-size: 0.78rem; color: var(--text-secondary); margin-top: 4px; }
.unit-toggle { display: flex; gap: 8px; margin-bottom: 24px; }
.unit-toggle button { padding: 8px 20px; border-radius: 8px; border: 1px solid var(--border); background: transparent; color: var(--text-secondary); cursor: pointer; font-size: 0.875rem; transition: all 0.2s; }
.unit-toggle button.active { background: var(--accent); border-color: var(--accent); color: white; font-weight: 600; }
.radio-group { display: flex; gap: 16px; flex-wrap: wrap; }
.radio-option { display: flex; align-items: center; gap: 8px; cursor: pointer; font-size: 0.9rem; color: var(--text-secondary); }
.radio-option input { accent-color: var(--accent); width: 16px; height: 16px; margin: 0; flex-shrink: 0; vertical-align: middle; }
.btn-calculate { width: 100%; padding: 16px; background: var(--accent); color: white; border: none; border-radius: 8px; font-size: 1rem; font-weight: 700; cursor: pointer; transition: background 0.2s; letter-spacing: 0.02em; margin-top: 4px; }
.btn-calculate:hover { background: var(--accent-hover); }
.btn-calculate + p.view-results { text-align: center; font-size: 0.78rem; color: var(--text-secondary); margin: 8px 0 0; }

/* Results */
.results-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; margin-bottom: 24px; display: none; }
.results-card.visible { display: block; }
.results-card h2 { font-size: 1.2rem; font-weight: 700; margin-bottom: 20px; }
.result-primary { text-align: center; padding: 28px 24px; background: var(--bg-card-2); border-radius: 10px; margin-bottom: 20px; border: 1px solid var(--border); }
.result-value { font-size: 3.5rem; font-weight: 800; color: var(--accent); line-height: 1; }
.result-label { color: var(--text-secondary); font-size: 0.9rem; margin-top: 8px; }
.result-category { font-size: 1.1rem; font-weight: 700; margin-top: 10px; color: var(--gold); }
.results-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 12px; margin-bottom: 20px; }
.result-item { background: var(--bg-card-2); border-radius: 8px; padding: 14px; text-align: center; border: 1px solid var(--border); }
.result-item .val { font-size: 1.2rem; font-weight: 700; color: var(--text); }
.result-item .lbl { font-size: 0.72rem; color: var(--text-secondary); margin-top: 4px; }
.result-info { background: rgba(225,29,72,0.13); border: 1px solid rgba(225,29,72,0.32); border-radius: 8px; padding: 14px 16px; font-size: 0.875rem; color: var(--text); line-height: 1.65; }

/* Percentile bar */
.percentile-bar-wrap { margin: 16px 0 4px; }
.percentile-bar-track { background: var(--bg-card-2); border-radius: 8px; height: 14px; overflow: hidden; border: 1px solid var(--border); }
.percentile-bar-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--gold)); border-radius: 8px; transition: width 0.9s cubic-bezier(0.4,0,0.2,1); }
.percentile-labels { display: flex; justify-content: space-between; font-size: 0.72rem; color: var(--text-secondary); margin-top: 5px; }

/* Quiz */
.quiz-progress { height: 4px; background: var(--bg-card-2); border-radius: 2px; margin-bottom: 28px; overflow: hidden; }
.quiz-progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--gold)); border-radius: 2px; transition: width 0.4s; }
.quiz-step { display: none; }
.quiz-step.active { display: block; }
.quiz-step-label { font-size: 0.78rem; color: var(--accent); font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 8px; }
.quiz-question { font-size: 1.1rem; font-weight: 700; margin-bottom: 20px; line-height: 1.4; }
.quiz-options { display: flex; flex-direction: column; gap: 10px; }
.quiz-option { padding: 14px 18px; background: var(--bg-card-2); border: 1px solid var(--border); border-radius: 8px; cursor: pointer; transition: all 0.2s; color: var(--text); font-size: 0.9rem; text-align: left; width: 100%; }
.quiz-option:hover { border-color: var(--accent); background: rgba(225,29,72,0.06); }
.quiz-option.selected { border-color: var(--accent); background: rgba(225,29,72,0.1); }
.btn-next { padding: 12px 32px; background: var(--accent); color: white; border: none; border-radius: 8px; font-size: 0.95rem; font-weight: 700; cursor: pointer; margin-top: 20px; transition: background 0.2s; }
.btn-next:hover { background: var(--accent-hover); }
.btn-next:disabled { opacity: 0.35; cursor: not-allowed; }

/* Sidebar */
.calc-sidebar { display: flex; flex-direction: column; gap: 20px; }
.sidebar-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.sidebar-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 14px; }
.related-links { display: flex; flex-direction: column; gap: 8px; }
.related-links a { color: var(--text-secondary); text-decoration: none; font-size: 0.875rem; padding: 9px 12px; border-radius: 6px; border: 1px solid var(--border); transition: all 0.2s; }
.related-links a:hover { color: var(--text); border-color: var(--accent); background: rgba(225,29,72,0.05); }

/* Ads */
.ad-banner-top { background: var(--bg-card); border-bottom: 1px solid var(--border); padding: 12px 24px; text-align: center; }
.ad-banner { background: #1a1a2e; border: 1px dashed #2d2d44; border-radius: 6px; display: flex; align-items: center; justify-content: center; color: var(--text-secondary); font-size: 0.78rem; letter-spacing: 0.05em; text-transform: uppercase; }
.ad-banner-top .ad-banner { height: 90px; max-width: 728px; margin: 0 auto; }
.ad-sidebar .ad-banner { width: 100%; min-height: 250px; }
.ad-bottom { margin-top: 24px; text-align: center; }
.ad-bottom .ad-banner { height: 90px; }
.ad-desktop { display: block; }
.ad-mobile { display: none; }
@media (max-width: 768px) { .ad-desktop { display: none; } .ad-mobile { display: block; } }

/* Footer */
footer { background: #06060f; border-top: 1px solid var(--border); padding: 56px 24px 28px; margin-top: 80px; }
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-brand .logo { font-size: 1.1rem; margin-bottom: 12px; display: inline-flex; }
.footer-brand p { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.65; max-width: 280px; }
.footer-col h4 { font-size: 0.78rem; font-weight: 700; margin-bottom: 16px; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.08em; }
.footer-col a { display: block; color: var(--text-secondary); text-decoration: none; font-size: 0.875rem; margin-bottom: 10px; transition: color 0.2s; }
.footer-col a:hover { color: var(--accent); }
.footer-disclaimer { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; padding: 14px 16px; font-size: 0.78rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 28px; }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 20px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-bottom span { color: var(--text-secondary); font-size: 0.82rem; }
.footer-bottom div { display: flex; gap: 16px; }
.footer-bottom a { color: var(--text-secondary); text-decoration: none; font-size: 0.82rem; }
.footer-bottom a:hover { color: var(--text); }

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.2rem; }
  .hero-stats { gap: 28px; }
  nav { display: none; }
}
@media (max-width: 600px) {
  .calc-page-wrapper { padding: 16px; }
  .result-value { font-size: 2.8rem; }
  .calc-hero h1 { font-size: 1.6rem; }
}