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

/* ロゴ */
.logo {
    width: 50px;
    height: auto;
    border-radius: 4px;
    box-shadow: 2px 2px 6px rgba(0, 0, 0, 0.4);
}

.login-page .logo {
    width: 40px;
}

/* ログインフォーム */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #FAFAFA;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 2.5rem;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.login-container h1 {
    font-size: 1.5rem;
    color: #2D3E50;
    margin-bottom: 1.5rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.login-form .form-group {
    margin-bottom: 1.5rem;
}

.login-form label {
    display: block;
    margin-bottom: 0.5rem;
    color: #2D3E50;
    font-weight: 500;
}

.login-form input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #d2d2d7;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.2s;
}

.login-form input:focus {
    outline: none;
    border-color: #2D3E50;
    box-shadow: 0 0 0 3px rgba(45, 62, 80, 0.1);
}

.login-form button {
    width: 100%;
    padding: 0.75rem;
    background: #2D3E50;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.login-form button:hover {
    background: #1a2530;
}

.login-form button:disabled {
    background: #95a5a6;
    cursor: not-allowed;
}

.error-message {
    background: #ffebee;
    color: #c62828;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}