* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f5f5f5;
    color: #222;
}

.container {
    width: 100%;
    max-width: 480px;
    margin: 80px auto;
    padding: 20px;
}

header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 30px;
}

.logo {
    width: 42px;
    height: 42px;
    border-radius: 8px;
    background: #222;
    color: white;

    display: flex;
    align-items: center;
    justify-content: center;

    font-weight: bold;
    font-size: 22px;
}

.title {
    font-size: 20px;
    font-weight: bold;
}

.subtitle {
    margin-top: 4px;
    color: #666;
    font-size: 14px;
}

.card {
    background: white;
    padding: 30px;
    border-radius: 12px;

    box-shadow:
        0 4px 20px rgba(0, 0, 0, 0.08);
}

h1 {
    margin-top: 0;
}

.description {
    color: #666;
    margin-bottom: 25px;
}

label {
    display: block;
    margin-top: 16px;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: bold;
}

input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 16px;
}

button {
    width: 100%;
    margin-top: 24px;
    padding: 12px;

    border: 0;
    border-radius: 6px;

    background: #222;
    color: white;

    font-size: 16px;
    cursor: pointer;
}

button:disabled {
    opacity: 0.6;
    cursor: default;
}

.error {
    margin-top: 16px;
    padding: 12px;

    background: #ffe8e8;
    color: #b00020;

    border-radius: 6px;
    font-size: 14px;
}