:root {
    --primary: #336699;
    --primary-dark: #244d73;
    --primary-soft: #eaf3fb;

    --navy: #0f2238;
    --text: #172b45;
    --muted: #6d7f95;

    --white: #ffffff;
    --bg: #f5f8fc;
    --border: #dbe5ef;
    --danger: #d93030;

    --shadow: 0 28px 70px rgba(15, 34, 56, 0.14);
}

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

body {
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    background: #f6f9fd;
    color: var(--text);
}

.login-layout {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

/* LADO IZQUIERDO */
.login-brand {
    position: relative;
    display: flex;
    align-items: center;
    padding: 72px;
    overflow: hidden;
    background:
        radial-gradient(circle at 15% 20%, rgba(51, 102, 153, 0.20), transparent 28%),
        linear-gradient(135deg, #f8fbff 0%, #eaf3fb 100%);
}

.login-brand::before {
    content: "";
    position: absolute;
    width: 620px;
    height: 620px;
    left: -250px;
    bottom: -260px;
    border-radius: 160px;
    background: rgba(51, 102, 153, 0.07);
    transform: rotate(-22deg);
}

.login-brand::after {
    content: "";
    position: absolute;
    width: 420px;
    height: 420px;
    right: -180px;
    top: -170px;
    border-radius: 50%;
    background: rgba(51, 102, 153, 0.08);
}

.brand-content {
    position: relative;
    z-index: 2;
    max-width: 560px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 48px;
}

.logo-mark,
.login-logo {
    width: 68px;
    height: 68px;
    border-radius: 20px;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 38px;
    font-weight: 800;
    box-shadow: 0 18px 36px rgba(51, 102, 153, 0.24);
}

.brand-logo h1 {
    font-size: 36px;
    font-weight: 800;
    color: var(--navy);
}

.brand-content h2 {
    max-width: 540px;
    font-size: 44px;
    line-height: 1.12;
    letter-spacing: -1.2px;
    color: var(--navy);
    margin-bottom: 22px;
}

.brand-content p {
    max-width: 460px;
    font-size: 18px;
    line-height: 1.7;
    color: var(--muted);
}

/* MOCKUP SUAVE DEL SISTEMA */
.preview-card {
    position: relative;
    margin-top: 54px;
    width: 520px;
    height: 260px;
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.55);
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 30px 70px rgba(51, 102, 153, 0.12);
    overflow: hidden;
    transform: rotate(-4deg);
    opacity: 0.75;
}

.preview-sidebar {
    position: absolute;
    left: 0;
    top: 0;
    width: 95px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary), var(--primary-dark));
}

.preview-content {
    margin-left: 120px;
    padding: 32px;
}

.preview-line.large {
    width: 180px;
    height: 18px;
    background: rgba(51, 102, 153, 0.20);
    border-radius: 20px;
    margin-bottom: 26px;
}

.preview-grid {
    display: flex;
    gap: 14px;
    margin-bottom: 28px;
}

.preview-grid span {
    width: 95px;
    height: 70px;
    background: rgba(51, 102, 153, 0.12);
    border-radius: 16px;
}

.preview-table span {
    display: block;
    height: 14px;
    width: 320px;
    background: rgba(109, 127, 149, 0.12);
    border-radius: 20px;
    margin-bottom: 14px;
}

/* LADO DERECHO */
.login-form-section {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px;
    background:
        radial-gradient(circle at 85% 10%, rgba(51, 102, 153, 0.10), transparent 30%),
        #ffffff;
}

.login-card {
    width: 100%;
    max-width: 500px;
    background: var(--white);
    border: 1px solid rgba(219, 229, 239, 0.95);
    border-radius: 32px;
    padding: 52px;
    box-shadow: var(--shadow);
}

.login-header {
    text-align: center;
    margin-bottom: 38px;
}

.login-logo {
    margin: 0 auto 22px;
    background: var(--primary-soft);
    color: var(--primary);
    box-shadow: none;
}

.login-header h2 {
    font-size: 36px;
    font-weight: 800;
    color: var(--navy);
    letter-spacing: -0.6px;
    margin-bottom: 10px;
}

.login-header p {
    color: var(--muted);
    font-size: 16px;
}

.alert-error {
    margin-bottom: 24px;
    padding: 14px 16px;
    border-radius: 14px;
    background: #fff1f1;
    border: 1px solid #ffd6d6;
    color: var(--danger);
    font-size: 14px;
    font-weight: 700;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    color: var(--navy);
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 10px;
}

.input-box {
    position: relative;
}

.input-box input {
    width: 100%;
    height: 58px;
    border-radius: 15px;
    border: 1px solid var(--border);
    background: #ffffff;
    padding: 0 18px 0 52px;
    font-size: 15px;
    color: var(--text);
    outline: none;
    transition: all 0.2s ease;
}

.input-box input::placeholder {
    color: #9aa8b8;
}

.input-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(51, 102, 153, 0.12);
}

.input-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
    opacity: 0.55;
}

.form-row {
    margin: 4px 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.remember {
    display: flex;
    align-items: center;
    gap: 9px;
    color: var(--muted);
    font-size: 14px;
}

.remember input {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.form-row a {
    color: var(--primary);
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
}

.form-row a:hover {
    text-decoration: underline;
}

.btn-login {
    width: 100%;
    height: 60px;
    border: none;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    font-size: 17px;
    font-weight: 800;
    cursor: pointer;
    box-shadow: 0 16px 32px rgba(51, 102, 153, 0.28);
    transition: all 0.2s ease;
}

.btn-login:hover {
    transform: translateY(-1px);
    box-shadow: 0 20px 42px rgba(51, 102, 153, 0.34);
}

.secure-note {
    margin-top: 30px;
    padding-top: 24px;
    border-top: 1px solid #eef2f6;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--muted);
    font-size: 14px;
}

/* RESPONSIVE */
@media (max-width: 1000px) {
    .login-layout {
        grid-template-columns: 1fr;
    }

    .login-brand {
        display: none;
    }

    .login-form-section {
        min-height: 100vh;
        padding: 28px;
        background:
            radial-gradient(circle at top left, rgba(51, 102, 153, 0.14), transparent 32%),
            linear-gradient(180deg, #f8fbff 0%, #edf4fa 100%);
    }

    .login-card {
        max-width: 440px;
        padding: 38px 28px;
        border-radius: 28px;
    }
}

@media (max-width: 480px) {
    .login-form-section {
        align-items: flex-start;
        padding: 52px 22px 24px;
    }

    .login-card {
        padding: 24px 0;
        box-shadow: none;
        border: none;
        background: transparent;
    }

    .login-header h2 {
        font-size: 34px;
    }

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