:root {
    --bg: #f5f7fb;
    --panel: #ffffff;
    --line: #e4e7ec;
    --text: #101828;
    --muted: #667085;
    --primary: #175cd3;
    --primary-hover: #1849a9;
    --danger: #b42318;
    --shadow: 0 12px 32px rgba(16, 24, 40, 0.1);
    --radius: 18px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100%;
}

body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.login-shell {
    width: min(980px, 100%);
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.login-left {
    padding: 40px;
    background: linear-gradient(135deg, #eef4ff 0%, #f8fbff 100%);
    border-right: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.login-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
}

.login-logo {
    width: 56px;
    height: 56px;
    object-fit: contain;
    border-radius: 12px;
    background: #fff;
    border: 1px solid var(--line);
}

.login-brand-text h1 {
    margin: 0;
    font-size: 24px;
}

.login-brand-text p {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 14px;
}

.login-highlight {
    margin-top: 18px;
    color: #344054;
    line-height: 1.7;
    font-size: 14px;
}

.login-right {
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.login-title {
    margin: 0 0 8px;
    font-size: 28px;
}

.login-subtitle {
    margin: 0 0 24px;
    color: var(--muted);
    font-size: 14px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 0 14px;
    font-size: 14px;
    outline: none;
}

.form-control:focus {
    border-color: #98b6ff;
    box-shadow: 0 0 0 4px rgba(23, 92, 211, 0.08);
}

.btn-login {
    height: 46px;
    border: none;
    border-radius: 12px;
    background: var(--primary);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
}

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

.btn-login:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

.login-message {
    min-height: 22px;
    font-size: 13px;
}

.login-message.error {
    color: var(--danger);
}

.login-message.success {
    color: #067647;
}

.login-footer {
    margin-top: 16px;
    color: var(--muted);
    font-size: 12px;
}

@media (max-width: 900px) {
    .login-shell {
        grid-template-columns: 1fr;
    }

    .login-left {
        border-right: none;
        border-bottom: 1px solid var(--line);
    }

    .login-left,
    .login-right {
        padding: 24px;
    }
}