:root {
    --bg: #0B1220;
    --surface: #111B2E;
    --surface-alt: #16233A;
    --border: #223049;
    --text: #E8EDF7;
    --muted: #8393B0;
    --accent: #22D3EE;
    --accent-dim: #0E7490;
    --danger: #F0555A;
}

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

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

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

.login-box {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 50px 40px;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
    width: 100%;
    max-width: 420px;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-box h1 {
    text-align: center;
    color: var(--text);
    margin-bottom: 10px;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 28px;
    font-weight: 700;
}

.login-box::before {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dim));
    margin: 0 auto 30px;
    border-radius: 2px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--muted);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-family: 'JetBrains Mono', monospace;
    transition: all 0.2s ease;
    background: var(--surface-alt);
    color: var(--text);
}

.form-group input::placeholder {
    color: var(--muted);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
}

.btn-ingresar {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: #03202A;
    border: 1px solid var(--accent);
    border-radius: 8px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-ingresar:hover {
    background: #67e8f9;
}

.btn-ingresar:active {
    transform: scale(0.98);
}

.alerta-error {
    display: none;
    margin-top: 16px;
    padding: 10px 14px;
    border-radius: 6px;
    background: rgba(240, 85, 90, .12);
    border: 1px solid rgba(240, 85, 90, .3);
    color: var(--danger);
    font-size: 13px;
    text-align: center;
}

.footer-link {
    text-align: center;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.footer-link a {
    color: var(--accent);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
}

.footer-link a:hover {
    text-decoration: underline;
}

/* Estilos responsivos */
@media (max-width: 480px) {
    .login-box {
        padding: 40px 25px;
    }

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

    .form-group input,
    .btn-ingresar {
        padding: 12px;
        font-size: 14px;
    }
}