:root {
    --bg: #06111f;
    --panel: #10243a;
    --line: rgba(255,255,255,.1);
    --text: #f5f9ff;
    --muted: #9fb4ca;
    --blue: #2d8cff;
    --green: #41d66b;
    --red: #ff4d4d;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(45,140,255,.25), transparent 35%),
        radial-gradient(circle at bottom right, rgba(255,77,77,.14), transparent 35%),
        var(--bg);
}

.login-page {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1.2fr 420px;
    gap: 40px;
    align-items: center;
    padding: 60px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 40px;
}

.brand-mark {
    width: 54px;
    height: 54px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #1f7aff, #e02d3f);
    font-weight: 900;
}

.brand strong {
    display: block;
    font-size: 24px;
    letter-spacing: .08em;
}

.brand span {
    color: var(--blue);
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: .16em;
}

.login-hero h1 {
    font-size: clamp(38px, 5vw, 72px);
    line-height: 1;
    margin: 0 0 20px;
}

.login-hero p {
    max-width: 680px;
    color: var(--muted);
    font-size: 18px;
    line-height: 1.6;
}

.system-card {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 28px;
    padding: 14px 18px;
    border-radius: 14px;
    background: rgba(65,214,107,.12);
    border: 1px solid rgba(65,214,107,.28);
    color: var(--green);
}

.pulse {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 0 8px rgba(65,214,107,.12);
}

.login-card {
    background: linear-gradient(180deg, rgba(20,46,74,.96), rgba(10,25,43,.96));
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 34px;
    box-shadow: 0 24px 60px rgba(0,0,0,.35);
}

.login-card h2 {
    margin: 0;
    font-size: 30px;
}

.login-card p {
    color: var(--muted);
}

.alert {
    padding: 12px 14px;
    border-radius: 10px;
    background: rgba(255,77,77,.12);
    border: 1px solid rgba(255,77,77,.3);
    color: #ffc7c7;
    margin-bottom: 16px;
}

label {
    display: block;
    margin: 18px 0;
    color: var(--muted);
    font-size: 14px;
}

input {
    display: block;
    width: 100%;
    margin-top: 8px;
    padding: 15px;
    border-radius: 12px;
    border: 1px solid var(--line);
    background: rgba(255,255,255,.06);
    color: var(--text);
    font-size: 16px;
}

input:focus {
    outline: 2px solid rgba(45,140,255,.45);
}

button {
    width: 100%;
    margin-top: 10px;
    padding: 15px;
    border: 0;
    border-radius: 12px;
    background: linear-gradient(135deg, #1f7aff, #2d8cff);
    color: white;
    font-weight: 800;
    cursor: pointer;
}

.login-footer {
    margin-top: 22px;
    color: var(--muted);
    text-align: center;
    font-size: 13px;
}

@media (max-width: 900px) {
    .login-page {
        grid-template-columns: 1fr;
        padding: 28px;
    }
}