:root {
    --bg-dark: #101827;
    --bg-panel: #172337;
    --primary: #3978f6;
    --primary-hover: #2864dc;
    --text-dark: #182338;
    --text-muted: #8792a5;
    --border: #e4e9f0;
}

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

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

.login-page {
    background: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px;
}

.login-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
    max-width: 1100px;
    min-height: 650px;
    background: #fff;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 25px 80px rgba(0, 0, 0, .3);
}

.login-brand {
    background:
        radial-gradient(circle at 80% 20%,
        rgba(57, 120, 246, .25), transparent 35%),
        linear-gradient(145deg, #172943, #101827);
    color: #fff;
    padding: 55px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.brand-logo,
.mobile-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 25px;
    font-weight: 750;
    letter-spacing: -.8px;
}

.brand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 39px;
    height: 39px;
    background: var(--primary);
    border-radius: 11px;
    color: #fff;
    font-size: 23px;
    font-weight: 800;
}

.brand-content {
    max-width: 400px;
}

.brand-tag,
.form-label {
    color: #6f9dff;
    font-size: 11px;
    font-weight: 750;
    letter-spacing: 2px;
}

.brand-content h1 {
    font-size: 43px;
    line-height: 1.15;
    margin: 22px 0;
    letter-spacing: -1.5px;
}

.brand-content p {
    color: #aab8ca;
    font-size: 15px;
    line-height: 1.8;
}

.brand-footer {
    color: #708099;
    font-size: 10px;
    letter-spacing: 2px;
}

.login-form-section {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 55px;
}

.login-form-wrapper {
    width: 100%;
    max-width: 360px;
}

.mobile-logo {
    display: none;
}

.form-label {
    color: var(--primary);
}

.login-form-wrapper h2 {
    color: var(--text-dark);
    font-size: 30px;
    margin-top: 15px;
    letter-spacing: -1px;
}

.form-description {
    color: var(--text-muted);
    font-size: 14px;
    margin: 12px 0 38px;
}

.form-group {
    margin-bottom: 23px;
}

.form-group label {
    display: block;
    color: var(--text-dark);
    font-size: 13px;
    font-weight: 650;
    margin-bottom: 9px;
}

.form-group input {
    width: 100%;
    height: 50px;
    padding: 0 15px;
    border: 1px solid var(--border);
    border-radius: 8px;
    outline: none;
    font-size: 14px;
    color: var(--text-dark);
    transition: border .2s, box-shadow .2s;
}

.form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(57, 120, 246, .12);
}

.form-group input::placeholder {
    color: #aab3c0;
}

#loginButton {
    width: 100%;
    height: 51px;
    margin-top: 10px;
    border: none;
    border-radius: 8px;
    background: var(--primary);
    color: white;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: background .2s, transform .2s;
}

#loginButton:hover {
    background: var(--primary-hover);
}

#loginButton:active {
    transform: scale(.99);
}

#loginButton:disabled {
    opacity: .65;
    cursor: wait;
}

.login-message {
    display: none;
    margin: 12px 0;
    padding: 11px;
    border-radius: 7px;
    font-size: 13px;
    line-height: 1.5;
}

.login-message.error {
    display: block;
    background: #fff0f0;
    color: #c03939;
}

.login-message.success {
    display: block;
    background: #edfaf2;
    color: #21834a;
}

.login-security {
    text-align: center;
    margin-top: 32px;
    color: var(--text-muted);
    font-size: 12px;
}

.login-security span {
    color: #25a66a;
    margin-right: 5px;
}

@media (max-width: 800px) {
    .login-page {
        padding: 15px;
    }

    .login-container {
        grid-template-columns: 1fr;
        max-width: 480px;
        min-height: auto;
    }

    .login-brand {
        display: none;
    }

    .login-form-section {
        padding: 45px 30px;
    }

    .mobile-logo {
        display: flex;
        margin-bottom: 45px;
        color: var(--text-dark);
    }
}

@media (max-width: 400px) {
    .login-form-section {
        padding: 35px 22px;
    }

    .login-form-wrapper h2 {
        font-size: 26px;
    }
}