:root {
    --primary: #0062cc;
    --secondary: #6c757d;
    --bg: #eef2f7;
    --white: #ffffff;
    --shadow: 0 15px 35px rgba(0,0,0,0.1);
}

body {
    font-family: 'Hind Siliguri', sans-serif;
    background: var(--bg);
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.auth-card {
    background: var(--white);
    width: 100%;
    max-width: 400px;
    padding: 40px 30px;
    border-radius: 25px;
    box-shadow: var(--shadow);
    text-align: center;
}

.brand-logo i { font-size: 50px; color: var(--primary); margin-bottom: 10px; }
.brand-logo h2 { margin: 0; color: #333; }
.brand-logo p { margin-top: 5px; color: var(--secondary); font-size: 14px; }

.auth-box { display: none; margin-top: 30px; }
.auth-box.active { display: block; animation: slideIn 0.4s ease-out; }

.form-title { font-size: 20px; color: #444; margin-bottom: 20px; }

.input-group {
    display: flex;
    align-items: center;
    background: #f8f9fa;
    border: 1px solid #ddd;
    border-radius: 12px;
    margin-bottom: 15px;
    padding: 5px 15px;
}

.input-group i { color: var(--primary); width: 25px; }
.input-group input {
    border: none; background: transparent; padding: 12px;
    width: 100%; outline: none; font-family: 'Hind Siliguri';
}

.btn-primary {
    width: 100%; padding: 14px; border: none;
    background: var(--primary); color: white;
    border-radius: 12px; font-weight: bold; font-size: 16px;
    cursor: pointer; transition: 0.3s; margin-top: 10px;
}

.btn-primary:hover { background: #004fb0; transform: translateY(-2px); }

.extra-links { margin-top: 20px; font-size: 14px; }
.extra-links span { color: var(--primary); cursor: pointer; font-weight: 600; }

/* Modal */
.modal {
    display: none; position: fixed; top: 0; left: 0;
    width: 100%; height: 100%; background: rgba(0,0,0,0.6);
    justify-content: center; align-items: center; z-index: 100;
}

.modal-content {
    background: white; padding: 30px; border-radius: 20px;
    width: 85%; max-width: 320px; text-align: center;
}

.modal-icon { font-size: 40px; color: #28a745; margin-bottom: 15px; }

.otp-input {
    letter-spacing: 5px; font-size: 24px; text-align: center;
    font-weight: bold; border-bottom: 2px solid var(--primary) !important;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}