:root {
    --primary-color: #0d0f1a; /* Azul muy oscuro casi negro */
    --secondary-color: #1a1c2d; /* Azul oscuro */
    --accent-color: #00ffff; /* Cyan brillante */
    --glow-color: rgba(0, 255, 255, 0.5);
    --text-color: #e0e0e0;
    --text-muted: #7a869a;
    --font-primary: 'Orbitron', sans-serif;
    --font-secondary: 'Poppins', sans-serif;
}

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

body {
    font-family: var(--font-secondary);
    background-color: var(--primary-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden; /* Para que el canvas no genere scrollbars */
    position: relative; /* Para el canvas */
}

#particle-canvas {
    position: fixed; /* o absolute */
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0; /* Detrás de todo */
}

.login-container {
    background-color: rgba(26, 28, 45, 0.85); /* var(--secondary-color) con transparencia */
    padding: 40px 50px;
    border-radius: 15px;
    box-shadow: 0 0 30px var(--glow-color), 0 0 10px var(--accent-color) inset;
    text-align: center;
    width: 100%;
    max-width: 450px;
    z-index: 1; /* Encima del canvas */
    border: 1px solid var(--accent-color);
    position: relative; /* Para elementos pseudo */
    overflow: hidden; /* Para los bordes animados */
}

.login-container::before,
.login-container::after {
    content: '';
    position: absolute;
    width: 50px;
    height: 2px;
    background-color: var(--accent-color);
    animation: border-glow 3s infinite linear;
}

.login-container::before {
    top: 10px;
    left: -50px;
}

.login-container::after {
    bottom: 10px;
    right: -50px;
    animation-delay: 1.5s;
}

@keyframes border-glow {
    0% { transform: translateX(0); opacity: 0.5; }
    50% { opacity: 1; }
    100% { transform: translateX(550px); opacity: 0.5; } /* max-width + padding + offset */
}


.logo-area h1 {
    font-family: var(--font-primary);
    font-size: 2.5em;
    color: var(--text-color);
    margin-bottom: 5px;
    letter-spacing: 2px;
    text-shadow: 0 0 10px var(--accent-color);
}

.logo-area .highlight {
    color: var(--accent-color);
    text-shadow: 0 0 15px var(--accent-color);
}

.logo-area .subtitle {
    font-size: 0.9em;
    color: var(--text-muted);
    margin-bottom: 30px;
    letter-spacing: 1px;
}

.input-group {
    position: relative;
    margin-bottom: 25px;
}

.input-group input {
    width: 100%;
    padding: 15px 15px 15px 15px; /* Espacio para el label flotante */
    background-color: rgba(13, 15, 26, 0.7); /* var(--primary-color) con opacidad */
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    color: var(--text-color);
    font-size: 1em;
    outline: none;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.input-group input::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
}

.input-group input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 15px var(--glow-color);
}

.input-group label {
    position: absolute;
    left: 15px;
    top: 16px;
    color: var(--text-muted);
    pointer-events: none;
    transition: all 0.3s ease;
    background-color: transparent; /* Para que el texto del label no tape el borde del input */
    padding: 0 5px;
}

/* Animación del label flotante */
.input-group input:focus + label,
.input-group input:not(:placeholder-shown) + label {
    top: -10px;
    left: 10px;
    font-size: 0.8em;
    color: var(--accent-color);
    background-color: var(--secondary-color); /* Mismo que el container para que se vea bien */
    border-radius: 4px;
}


.login-button {
    width: 100%;
    padding: 15px;
    background: linear-gradient(45deg, var(--accent-color), #00c0c0);
    border: none;
    border-radius: 8px;
    color: var(--primary-color);
    font-family: var(--font-primary);
    font-size: 1.2em;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 10px var(--glow-color);
    margin-top: 10px;
    position: relative;
    overflow: hidden;
}

.login-button .button-text {
    margin-right: 10px;
}

.login-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px var(--glow-color);
}

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

/* Efecto de brillo al pasar el mouse */
.login-button::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    transition: transform 0.5s ease-out;
}

.login-button:hover::before {
    transform: translateX(200%);
}


.links {
    margin-top: 25px;
    display: flex;
    justify-content: space-between;
}

.links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9em;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

.links a:hover {
    color: var(--accent-color);
    text-shadow: 0 0 5px var(--accent-color);
}

.footer-text {
    margin-top: 30px;
    font-size: 0.8em;
    color: var(--text-muted);
    opacity: 0.7;
}

/* Responsive */
@media (max-width: 600px) {
    .login-container {
        padding: 30px 25px;
        margin: 20px;
        max-width: 90%;
    }

    .logo-area h1 {
        font-size: 2em;
    }

    .input-group input, .login-button {
        font-size: 0.9em;
    }
    .login-container::before,
    .login-container::after {
        animation: border-glow-mobile 3s infinite linear;
    }
    @keyframes border-glow-mobile {
        0% { transform: translateX(0); opacity: 0.5; }
        50% { opacity: 1; }
        100% { transform: translateX(400px); opacity: 0.5; } /* Ajustar para móviles */
    }
}