:root {
    --primary: #4F46E5;
    --primary-dark: #4338CA;
    --bg: #FAFAFA;
    --card: #FFFFFF;
    --text: #18181B;
    --text-muted: #71717A;
    --border: #E4E4E7;
    --success: #16A34A;
    --radius: 14px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

header.site-header {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 18px 0;
}
header.site-header .container { display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 22px; font-weight: 800; color: var(--primary); text-decoration: none; letter-spacing: -0.5px; }
nav a { color: var(--text); text-decoration: none; margin-left: 28px; font-weight: 500; font-size: 15px; }
nav a:hover { color: var(--primary); }

.hero { text-align: center; padding: 80px 24px 60px; }
.hero h1 { font-size: 42px; font-weight: 800; letter-spacing: -1px; margin-bottom: 16px; }
.hero p { font-size: 18px; color: var(--text-muted); max-width: 560px; margin: 0 auto 32px; }

.test-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    padding: 20px 0 80px;
}

.test-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    text-decoration: none;
    color: var(--text);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    display: block;
}
.test-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.08); }
.test-card .icon { font-size: 32px; margin-bottom: 14px; display: block; }
.test-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 8px; }
.test-card p { color: var(--text-muted); font-size: 14px; margin-bottom: 14px; }
.test-card .meta { font-size: 13px; color: var(--primary); font-weight: 600; }

.btn {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 14px 32px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 700;
    font-size: 16px;
    border: none;
    cursor: pointer;
    transition: background 0.15s ease;
}
.btn:hover { background: var(--primary-dark); }
.btn-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-block { width: 100%; text-align: center; }

/* Test-taking screen */
.test-shell { max-width: 680px; margin: 0 auto; padding: 50px 24px; }
.progress-bar { height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; margin-bottom: 32px; }
.progress-fill { height: 100%; background: var(--primary); transition: width 0.3s ease; }
.question-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 36px; }
.question-number { font-size: 13px; color: var(--text-muted); font-weight: 600; margin-bottom: 10px; }
.question-text { font-size: 22px; font-weight: 700; margin-bottom: 28px; }
.option {
    display: block;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    padding: 16px 18px;
    margin-bottom: 12px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.12s ease;
}
.option:hover { border-color: var(--primary); background: #F5F5FF; }
.option input { margin-right: 12px; }
.test-nav { display: flex; justify-content: space-between; margin-top: 28px; }

/* Results page */
.result-hero { text-align: center; padding: 60px 24px 40px; }
.score-circle {
    width: 160px; height: 160px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #818CF8);
    color: #fff; display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    margin: 0 auto 24px; font-weight: 800;
}
.score-circle .num { font-size: 44px; line-height: 1; }
.score-circle .label { font-size: 12px; opacity: 0.85; margin-top: 4px; }

.domain-bar-row { display: flex; align-items: center; gap: 16px; margin-bottom: 18px; }
.domain-bar-row .name { width: 160px; font-size: 14px; font-weight: 600; }
.domain-bar-track { flex: 1; height: 10px; background: var(--border); border-radius: 5px; overflow: hidden; }
.domain-bar-fill { height: 100%; background: var(--primary); }
.domain-bar-row .val { width: 40px; text-align: right; font-size: 13px; color: var(--text-muted); }

.paywall-card {
    background: var(--card); border: 1.5px solid var(--primary);
    border-radius: var(--radius); padding: 32px; text-align: center;
    max-width: 480px; margin: 40px auto;
}
.paywall-card .price { font-size: 36px; font-weight: 800; margin: 10px 0; }
.paywall-card ul { text-align: left; margin: 20px 0; padding-left: 0; list-style: none; }
.paywall-card li { padding: 6px 0; font-size: 15px; }
.paywall-card li::before { content: "✓ "; color: var(--success); font-weight: 800; }

footer { border-top: 1px solid var(--border); padding: 32px 0; text-align: center; color: var(--text-muted); font-size: 14px; margin-top: 60px; }

@media (max-width: 640px) {
    .hero h1 { font-size: 30px; }
    nav a { margin-left: 16px; font-size: 14px; }
}