/* === BASE CSS — Variables, Reset, Typography, Buttons, Layout === */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary: #1E40AF;
    --primary-dark: #1E3A8A;
    --primary-light: #3B82F6;
    --secondary: #4338CA;
    --green: #10B981;
    --green-dark: #059669;
    --red: #EF4444;
    --gold: #F59E0B;
    --bg: #F8FAFC;
    --bg-card: #FFFFFF;
    --text: #0F172A;
    --text-muted: #64748B;
    --text-light: #94A3B8;
    --border: #E2E8F0;
    --radius: 10px;
    --shadow: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container { max-width: 1280px; margin: 0 auto; padding: 0 16px; }
.section { padding: 24px 0; }
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.section-title { font-size: 1.1rem; font-weight: 800; color: var(--text); }
.section-link { font-size: 0.8rem; font-weight: 600; color: var(--primary); text-decoration: none; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    white-space: nowrap;
    text-align: center;
}
.btn-login { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-login:hover { background: var(--primary); color: white; }
.btn-demo { background: var(--green); color: white; }
.btn-demo:hover { background: var(--green-dark); }
.btn-enroll { background: var(--primary); color: white; }
.btn-enroll:hover { background: var(--primary-dark); }
.btn-lg { padding: 12px 24px; font-size: 0.9rem; }

@media (min-width: 1024px) {
    .container { padding: 0 32px; }
}