:root {
    --primary: #12355b;
    --primary-dark: #0b2239;
    --accent: #1f7a8c;
    --light-bg: #f4f7fb;
    --border: #dbe3ec;
    --text-muted: #6c757d;
}

* {
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    margin: 0;
    font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;

    background:
        radial-gradient(circle at 10% 10%, rgba(31, 122, 140, .10), transparent 25%),
        radial-gradient(circle at 90% 90%, rgba(18, 53, 91, .08), transparent 30%),
        linear-gradient(135deg, #f4f7fb 0%, #ffffff 50%, #eef2f7 100%);
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    width: 100%;
    max-width: 860px;

    border: 0;
    border-radius: 22px;
    overflow: hidden;

    background: #fff;

    box-shadow:
        0 18px 48px rgba(15, 23, 42, .16);
}

.login-brand {
    min-height: 430px;

    padding: 34px;

    color: #fff;

    background:
        linear-gradient(160deg,
            rgba(18, 53, 91, .98),
            rgba(11, 34, 57, .95));
}

.brand-badge {
    width: 52px;
    height: 52px;

    border-radius: 16px;

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

    font-size: 22px;

    background: rgba(255, 255, 255, .12);

    border: 1px solid rgba(255, 255, 255, .18);

    backdrop-filter: blur(8px);
}

.system-label {
    color: var(--accent);

    font-weight: 700;

    letter-spacing: .08em;

    font-size: 12px;

    text-transform: uppercase;
}

.login-brand .system-label {
    color: rgba(255, 255, 255, .65);
}

.login-brand h1 {
    font-size: 2.2rem;

    font-weight: 800;

    letter-spacing: -.5px;
}

.login-brand p {
    color: rgba(255, 255, 255, .82);

    line-height: 1.55;

    font-size: 15px;
}

.login-feature {
    display: flex;
    align-items: center;

    gap: 12px;

    margin-top: 14px;

    font-size: 13px;

    color: rgba(255, 255, 255, .90);
}

.login-feature i {
    width: 18px;

    color: #7dd3fc;
}

.login-form {
    min-height: 430px;

    padding: 34px;

    display: flex;
    align-items: center;
}

.form-control {
    min-height: 46px;

    border-color: var(--border);

    border-radius: 0 14px 14px 0;
}

.form-control:focus {
    border-color: var(--accent);

    box-shadow:
        0 0 0 .2rem rgba(31, 122, 140, .12);
}

.input-group-text {
    min-width: 48px;

    justify-content: center;

    background: #f8fafc;

    color: var(--primary);

    border-color: var(--border);

    border-radius: 14px 0 0 14px;
}

.btn-login {
    min-height: 46px;

    border: 0;

    border-radius: 14px;

    font-weight: 700;

    background:
        linear-gradient(135deg,
            var(--primary),
            var(--accent));

    box-shadow:
        0 10px 22px rgba(31, 122, 140, .22);
}

.btn-login:hover {
    filter: brightness(.97);
}

.security-note {
    font-size: 12px;

    color: var(--text-muted);
}

.login-footer {
    color: rgba(255, 255, 255, .55);

    font-size: 12px;
}

/* Tablet */

@media (max-width: 991px) {

    .login-page {
        align-items: flex-start;
        padding: 18px;
    }

    .login-card {
        max-width: 480px;
    }

    .login-brand {
        min-height: auto;
        padding: 26px;
    }

    .login-brand h1 {
        font-size: 2rem;
    }

    .login-brand p {
        font-size: 14px;
    }

    .brand-badge {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }

    .login-form {
        min-height: auto;
        padding: 26px;
    }
}

/* Mobile */

@media (max-width: 575px) {

    .login-page {
        padding: 12px;
    }

    .login-card {
        max-width: 100%;
        border-radius: 18px;
    }

    .login-brand {
        padding: 22px;
    }

    .login-brand h1 {
        font-size: 1.8rem;
    }

    .login-brand p {
        font-size: 13px;
    }

    .login-feature {
        font-size: 12px;
        gap: 10px;
    }

    .login-form {
        padding: 22px;
    }

    .login-footer {
        display: none;
    }

    .security-note {
        font-size: 11px;
    }
}