body {
    display: block;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

main.container {
    margin-top: 5%;
    padding: 0 20px;
}

/* Card Container */
.content {
    max-width: 450px;
    width: 100%;
    margin: 0 auto;
    padding: 40px;
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

/* Title */
.login-title {
    font-family: 'Satoshi', sans-serif;
    color: var(--brand);
    text-align: center;
    margin-bottom: 30px;
    font-weight: 300;
}

/* Form Layout */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    font-family: 'Satoshi', sans-serif;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
    display: block;
}

/* Inputs */
.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: 'General Sans', sans-serif;
    font-size: 16px;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
    background-image: none !important;
}

.form-control:focus {
    outline: none;
    border-color: var(--brand);
    box-shadow: 0 0 0 3px rgba(143, 0, 26, 0.1);
}

.form-control.is-invalid {
    border-color: #dc3545;
    background-image: none !important;
}

.invalid-feedback {
    color: #dc3545;
    font-size: 14px;
    margin-top: 5px;
}

/* Remember Me */
.form-check {
    margin-bottom: 20px;
}

.form-check-input {
    margin-right: 8px;
}

.form-check-label {
    font-family: 'General Sans', sans-serif;
    color: var(--text-muted);
    font-size: 14px;
}

/* Primary Button */
.btn-primary {
    background-color: var(--brand);
    border: none;
    color: white;
    padding: 14px 32px;
    border-radius: 8px;
    font-family: 'Satoshi', sans-serif;
    font-weight: 500;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    width: 100%;
}

.btn-primary:hover {
    background-color: var(--brand-dark);
}

.btn-primary:active {
    transform: scale(0.98);
}

/* Footer Links */
.text-muted {
    color: var(--text-muted);
    font-size: 14px;
}

.text-muted a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color 0.2s;
}

.text-muted a:hover {
    color: var(--brand);
}

/* Divider */
.border-top {
    border-top: 1px solid #e0e0e0;
    margin-top: 20px;
    padding-top: 20px;
    text-align: center;
}

/* Responsive */
@media (max-width: 375px) {
    main.container {
        margin-top: 25%;
    }
}

@media (max-width: 576px) {
    main.container {
        margin-top: 10%;
        padding: 0 16px;
    }
}

@media (max-width: 768px) {
    body {
        align-items: flex-start;
    }

    main.container {
        margin-top: 10%;
    }

    .content {
        padding: 24px;
        border-radius: 12px;
        box-shadow: none;
    }

    .content h2 {
        font-size: 40px;
        margin-bottom: 20px;
    }

    .btn-primary {
        padding: 14px;
        font-size: 16px;
    }

    .form-control {
        padding: 14px;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    body {
        align-items: center;
        padding-top: 100px;
    }

    .content {
        max-width: 520px;
        padding: 48px;
        border-radius: 16px;
    }

    .content h2 {
        font-size: 28px;
    }
}