* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: #f5f5f5;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 480px;
}

.card {
    background: white;
    border-radius: 8px;
    padding: 40px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

h1 {
    font-size: 28px;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
}

.header h1 {
    margin-bottom: 0;
}

.subtitle {
    color: #666;
    margin-bottom: 32px;
}

.logout-link {
    color: #666;
    text-decoration: none;
    font-size: 14px;
}

.logout-link:hover {
    color: #333;
    text-decoration: underline;
}

.form-group {
    margin-bottom: 24px;
}

label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: #333;
}

input[type="email"],
input[type="password"],
input[type="file"] {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 16px;
    transition: border-color 0.2s;
}

input[type="email"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: #333;
}

input[type="file"] {
    padding: 10px;
    cursor: pointer;
}

small {
    display: block;
    color: #888;
    font-size: 13px;
    margin-top: 6px;
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.radio-label {
    display: flex;
    flex-direction: column;
    padding: 16px;
    border: 1px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
    transition: border-color 0.2s, background-color 0.2s;
}

.radio-label:hover {
    border-color: #999;
}

.radio-label input[type="radio"] {
    position: absolute;
    opacity: 0;
}

.radio-label input[type="radio"]:checked + span {
    font-weight: 600;
}

.radio-label input[type="radio"]:checked ~ small {
    color: #333;
}

.radio-label:has(input:checked) {
    border-color: #333;
    background-color: #fafafa;
}

.radio-label span {
    font-weight: 500;
    margin-bottom: 4px;
}

.radio-label small {
    margin-top: 0;
}

.btn {
    width: 100%;
    padding: 14px 24px;
    background-color: #333;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn:hover {
    background-color: #555;
}

.btn:disabled {
    background-color: #999;
    cursor: not-allowed;
}

.error-message {
    background-color: #fee;
    border: 1px solid #fcc;
    color: #c00;
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 14px;
}

.success-message {
    background-color: #efe;
    border: 1px solid #cfc;
    color: #060;
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 14px;
}

@media (max-width: 520px) {
    .card {
        padding: 24px;
    }

    h1 {
        font-size: 24px;
    }
}