:root {
    --bg: #f6f6f6;
    --card: #ffffff;
    --border: #e5e5e5;
    --text: #111111;
    --muted: #666666;
    --black: #111111;
    --hover: #222222;
    --input-bg: #ffffff;
    --error: #d93025;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans KR", sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-wrap {
    width: 100%;
    max-width: 420px;
}

.login-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px 28px;
}

.login-header {
    text-align: center;
    margin-bottom: 28px;
}

.login-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

    .login-logo img {
        max-width: 200px;
        height: auto;
    }

.login-title {
    margin: 0;
    font-size: 28px;
    font-weight: 800;
    line-height: 1.2;
    color: #111;
}

.login-subtitle {
    margin: 8px 0 0;
    font-size: 13px;
    color: var(--muted);
    line-height: 1.5;
}

.form-group {
    margin-bottom: 14px;
}

.form-label {
    display: block;
    margin-bottom: 7px;
    font-size: 13px;
    font-weight: 600;
    color: #444;
}

.form-input {
    width: 100%;
    height: 46px;
    border: 1px solid #d9d9d9;
    border-radius: 10px;
    background: var(--input-bg);
    padding: 0 14px;
    font-size: 14px;
    color: #111;
    outline: none;
    transition: border-color .15s ease, box-shadow .15s ease;
}

    .form-input:focus {
        border-color: #111;
        box-shadow: 0 0 0 3px rgba(17,17,17,0.08);
    }

.form-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 6px 0 18px;
}

.checkbox-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: #444;
    cursor: pointer;
    user-select: none;
}

    .checkbox-wrap input {
        width: 16px;
        height: 16px;
        margin: 0;
        accent-color: #111;
    }

.login-help {
    font-size: 12px;
    color: var(--muted);
    text-decoration: none;
}

    .login-help:hover {
        text-decoration: underline;
    }

.login-btn {
    width: 100%;
    height: 48px;
    border: 1px solid #111;
    background: #111;
    color: #fff;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: background .15s ease, border-color .15s ease;
}

    .login-btn:hover {
        background: var(--hover);
        border-color: var(--hover);
    }

    .login-btn:disabled {
        opacity: .6;
        cursor: default;
    }

.login-footer {
    margin-top: 18px;
    text-align: center;
    font-size: 12px;
    color: var(--muted);
    line-height: 1.5;
}

.error-text {
    display: none;
    margin-top: 6px;
    font-size: 12px;
    color: var(--error);
}

.form-group.error .form-input {
    border-color: var(--error);
}

.form-group.error .error-text {
    display: block;
}

.server-error {
    margin-bottom: 14px;
    padding: 10px 12px;
    border-radius: 10px;
    background: #fff2f0;
    border: 1px solid #ffccc7;
    color: #cf1322;
    font-size: 13px;
}

@media (max-width: 767px) {
    .login-page {
        align-items: flex-start;
        padding: 20px 14px;
    }

    .login-wrap {
        max-width: none;
    }

    .login-card {
        padding: 24px 18px;
        border-radius: 14px;
        margin-top: 24px;
    }

    .login-title {
        font-size: 24px;
    }

    .login-subtitle {
        font-size: 12px;
    }

    .form-input {
        height: 48px;
        font-size: 15px;
    }

    .login-btn {
        height: 50px;
        font-size: 15px;
    }

    .form-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}