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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --background: #f4f7fb;
    --text-main: #17213d;
    --text-secondary: #64748b;
    --border: #dfe5ee;
    --danger: #dc2626;
}

html,
body {
    min-height: 100%;
}

body {
    min-height: 100vh;
    color: var(--text-main);
    background: var(--background);
    font-family:
        Inter,
        Arial,
        Helvetica,
        sans-serif;
}

button,
input {
    font: inherit;
}

.login-page {
    width: 100%;
    min-height: 100vh;

    display: grid;
    grid-template-columns: 1.05fr 1fr;
}

/* PHẦN TRÁI */

.login-visual {
    position: relative;

    min-height: 100vh;
    padding: 60px;

    color: #ffffff;

    background:
        radial-gradient(
            circle at top right,
            rgba(255, 255, 255, 0.15),
            transparent 30%
        ),
        linear-gradient(
            135deg,
            #1654bd,
            #2563eb,
            #3b82f6
        );

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

    overflow: hidden;
}

.login-visual::before {
    content: "";

    position: absolute;
    top: -130px;
    right: -130px;

    width: 330px;
    height: 330px;

    border-radius: 50%;

    background: rgba(255, 255, 255, 0.08);
}

.login-visual::after {
    content: "";

    position: absolute;
    bottom: -110px;
    left: -100px;

    width: 240px;
    height: 240px;

    border-radius: 50%;

    background: rgba(255, 255, 255, 0.08);
}

.login-visual-content {
    position: relative;
    z-index: 1;

    width: 100%;
    max-width: 470px;
}

.login-logo {
    width: 72px;
    height: 72px;

    margin-bottom: 24px;

    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 20px;

    background: rgba(255, 255, 255, 0.15);

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

    font-size: 38px;
}

.login-visual h1 {
    font-size: 34px;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.login-visual p {
    max-width: 440px;
    margin-top: 12px;

    color: rgba(255, 255, 255, 0.88);

    font-size: 15px;
    line-height: 1.65;
}

.login-features {
    margin-top: 35px;

    display: flex;
    flex-direction: column;
    gap: 14px;

    font-size: 14px;
}

/* PHẦN PHẢI */

.login-form-section {
    min-height: 100vh;
    padding: 30px;

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

.login-card {
    width: 100%;
    max-width: 430px;

    padding: 36px;

    border: 1px solid #e5eaf2;
    border-radius: 18px;

    background: #ffffff;

    box-shadow:
        0 20px 50px rgba(15, 23, 42, 0.1);
}

.login-card-header {
    margin-bottom: 26px;
}

.login-card-header h2 {
    color: var(--text-main);

    font-size: 28px;
    font-weight: 700;
}

.login-card-header p {
    margin-top: 7px;

    color: var(--text-secondary);
    font-size: 14px;
}

.login-alert {
    margin-bottom: 20px;
    padding: 12px 14px;

    border: 1px solid #fecaca;
    border-radius: 9px;

    color: #991b1b;
    background: #fef2f2;

    font-size: 13px;
}

.login-form {
    width: 100%;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;

    color: #334155;

    font-size: 13px;
    font-weight: 600;
}

.form-group input {
    width: 100%;
    height: 47px;

    padding: 0 13px;

    border: 1px solid var(--border);
    border-radius: 9px;

    color: var(--text-main);
    background: #ffffff;

    outline: none;

    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease;
}

.form-group input:focus {
    border-color: var(--primary);

    box-shadow:
        0 0 0 3px rgba(37, 99, 235, 0.12);
}

.password-field {
    position: relative;
}

.password-field input {
    padding-right: 48px;
}

.password-toggle {
    position: absolute;
    top: 50%;
    right: 7px;

    width: 35px;
    height: 35px;

    border: 0;
    border-radius: 7px;

    background: transparent;

    cursor: pointer;

    transform: translateY(-50%);
}

.login-button {
    width: 100%;
    height: 48px;

    border: 0;
    border-radius: 9px;

    color: #ffffff;

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

    font-size: 14px;
    font-weight: 700;

    cursor: pointer;

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.login-button:hover {
    transform: translateY(-1px);

    box-shadow:
        0 10px 22px rgba(37, 99, 235, 0.23);
}

.login-footer {
    margin-top: 24px;

    color: #94a3b8;

    font-size: 11px;
    text-align: center;
}

/* RESPONSIVE */

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

    .login-visual {
        min-height: 280px;
        padding: 40px;
    }

    .login-form-section {
        min-height: auto;
        padding: 35px 20px;
    }

    .login-features {
        display: none;
    }
}

@media (max-width: 520px) {
    .login-visual {
        min-height: 220px;
        padding: 25px;
    }

    .login-logo {
        width: 54px;
        height: 54px;
        margin-bottom: 14px;

        font-size: 28px;
    }

    .login-visual h1 {
        font-size: 24px;
    }

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

    .login-card {
        padding: 26px 20px;
    }
}