body {
    font-family: 'Inter', sans-serif;
    background-color: #f9fafb;
    color: #111827;
}

.text-accent { color: #1d4ed8; }
.bg-accent { background-color: #2563eb; }
.border-accent { border-color: #2563eb; }

.hero-pattern {
    background-image: radial-gradient(#2563eb 1px, transparent 1px);
    background-size: 32px 32px;
    opacity: 0.05;
}

.auth-container {
    background: white;
    border: 1px solid #e5e7eb;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.slot {
    min-height: 32px;
}

.theme-math {
    background-color: #eff6ff;
    border-color: #bfdbfe;
    color: #1e3a8a;
}

.theme-phys {
    background-color: #f0fdf4;
    border-color: #bbf7d0;
    color: #14532d;
}

.theme-hist {
    background-color: #fffbeb;
    border-color: #fde68a;
    color: #78350f;
}