:root { 
    --brand-navy: #0d3b66; 
    --brand-blue: #2563eb; 
    --glass-bg: rgba(255, 255, 255, 0.95); 
    --text-muted: #64748b;
}

body { 
    font-family: 'Inter', sans-serif; 
    background: radial-gradient(circle at top right, #f8fafc, #e2e8f0);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
}

h1, h2, h3, .logo-sdm {
    font-family: 'Plus Jakarta Sans', sans-serif;
}

.bento-card {
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    border-radius: 2.5rem;
    border: 1px solid rgba(255,255,255,0.7);
    box-shadow: 0 25px 50px -12px rgba(13, 59, 102, 0.1);
    max-width: 500px;
    width: 90%;
    padding: 3.5rem;
    animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp { 
    from { opacity: 0; transform: translateY(40px); } 
    to { opacity: 1; transform: translateY(0); } 
}

.logo-sdm { 
    font-weight: 800; 
    color: var(--brand-navy); 
    letter-spacing: -1.5px; 
    font-size: 1.75rem; 
    margin-bottom: 2.5rem; 
    display: block; 
    text-align: center; 
    text-decoration: none; 
}

.logo-sdm span { 
    color: var(--brand-blue); 
}

/* --- Floating Labels Refined (SDA Premium) --- */
.form-floating > .form-control { 
    border: 0; 
    border-bottom: 2px solid #e2e8f0; 
    border-radius: 0; 
    background: transparent; 
    padding-left: 0.5rem; 
    font-weight: 600;
    color: var(--brand-navy);
}

.form-floating > .form-control:focus { 
    box-shadow: none; 
    border-color: var(--brand-blue); 
}

.form-floating > label { 
    padding-left: 0.5rem; 
    color: var(--text-muted); 
    font-weight: 600; 
}

.form-text {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.btn-register {
    background: var(--brand-navy);
    color: white;
    border: 0;
    border-radius: 1.25rem;
    padding: 1.2rem;
    font-weight: 800;
    width: 100%;
    transition: all 0.3s ease;
    margin-top: 1rem;
    font-family: 'Plus Jakarta Sans', sans-serif;
}

.btn-register:hover { 
    transform: translateY(-4px); 
    box-shadow: 0 12px 20px rgba(13, 59, 102, 0.2); 
    background: #0a2d4d;
    color: white; 
}

.google-sync-box {
    background: #f1f5f9;
    border-radius: 1.5rem;
    padding: 1.75rem;
    border: 1px solid #e2e8f0;
}

.form-check-input:checked {
    background-color: var(--brand-blue);
    border-color: var(--brand-blue);
}

.op-hover:hover { opacity: 0.8; transition: 0.3s; }

.alert-mini { 
    font-size: 0.75rem; 
    padding: 0.5rem 0.5rem; 
    font-weight: 700;
    margin-top: 0.5rem; 
}