/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #F0F9FF;
    color: #1F2937;
    line-height: 1.7;
    font-size: 16px;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

/* Card */
.card {
    background-color: #FFFFFF;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
    max-width: 400px;
    margin: 48px auto;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

/* Typography */
h1 {
    font-size: 2.25rem;
    color: #1E3A8A;
    margin-bottom: 32px;
    text-align: center;
    font-weight: 700;
}

p {
    font-size: 1.125rem;
    margin-bottom: 20px;
}

/* Navigation Bar */
.navbar {
    background-color: #1E3A8A;
    padding: 20px 0;
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand {
    color: #FFFFFF;
    font-size: 1.75rem;
    font-weight: 700;
    padding: 0 24px;
    float: left;
    line-height: 40px;
}

.navbar ul {
    list-style-type: none;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    margin: 0;
    padding: 0 24px;
}

.navbar li {
    margin: 0 16px;
}

.navbar a {
    color: #FFFFFF;
    text-decoration: none;
    font-size: 1.1rem;
    padding: 12px 20px;
    border-radius: 6px;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.navbar a:hover {
    background-color: #2DD4BF;
    transform: translateY(-2px);
}

/* Form Styles */
.user-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.95rem;
    color: #1F2937;
    margin-bottom: 10px;
    font-weight: 500;
}

.form-group input {
    padding: 14px;
    border: 1px solid #D1D5DB;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #2DD4BF;
    box-shadow: 0 0 0 4px rgba(45, 212, 191, 0.15);
}

.btn {
    padding: 14px;
    border: none;
    border-radius: 6px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn-primary {
    background-color: #2DD4BF;
    color: #FFFFFF;
    font-weight: 600;
}

.btn-primary:hover {
    background-color: #0D9488;
    transform: translateY(-2px);
}

.form-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 0.95rem;
}

.form-footer a {
    color: #2DD4BF;
    text-decoration: none;
    font-weight: 500;
}

.form-footer a:hover {
    text-decoration: underline;
}

/* Alerts */
.error {
    background-color: #FEE2E2;
    color: #DC2626;
    padding: 14px;
    border-radius: 6px;
    text-align: center;
    margin-bottom: 20px;
    font-weight: 500;
}

.success {
    background-color: #D1FAE5;
    color: #059669;
    padding: 14px;
    border-radius: 6px;
    text-align: center;
    margin-bottom: 20px;
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 12px;
    }

    .card {
        padding: 24px;
        margin: 24px auto;
    }

    h1 {
        font-size: 1.75rem;
    }

    .navbar {
        padding: 12px 0;
    }

    .navbar-brand {
        float: none;
        text-align: center;
        margin-bottom: 12px;
        display: block;
    }

    .navbar ul {
        flex-direction: column;
        align-items: center;
        padding: 0;
    }

    .navbar li {
        margin: 8px 0;
    }

    .navbar a {
        padding: 10px 16px;
    }
}

@media (max-width: 480px) {
    .card {
        padding: 16px;
    }

    h1 {
        font-size: 1.5rem;
    }

    .btn {
        font-size: 1rem;
        padding: 12px;
    }
}