:root {
    --matrix-green: #00FF41;
    --dark-green: #008F11;
    --background-color: #0D0D0D;
    --text-glow: 0 0 5px var(--matrix-green);
}

@font-face {
    font-family: 'Matrix-Code';
    src: url('../assets/Matrix-Code.ttf') format('truetype');
}

body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
    background: var(--background-color);
    color: var(--matrix-green);
    font-family: 'Matrix-Code', monospace;
    text-shadow: var(--text-glow);
}
        /* Efecto de monitor antiguo CRT (superposición) */
body::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                /* Scanlines más visibles */
                repeating-linear-gradient(0deg, rgba(0,0,0,.2) 0, rgba(0,0,0,.2) 1px, transparent 1px, transparent 2px),
                /* Puntos estáticos (ruido) más notables */
                radial-gradient(circle at center, rgba(0,0,0,0) 0, rgba(0,0,0,.1) 50%, rgba(0,0,0,.3) 100%);
            background-size: 100% 4px, 100% 100%;
            background-blend-mode: overlay;
            pointer-events: none;
            z-index: 1000;
            animation: flicker 0.2s infinite alternate;
}

canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

#chat-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    max-width: 800px;
    height: 80%;
    border: 2px solid var(--dark-green);
    background: rgba(0, 0, 0, 0.75);
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(2px);
}

#messages {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--dark-green) var(--background-color);
}

#messages::-webkit-scrollbar {
    width: 8px;
}

#messages::-webkit-scrollbar-track {
    background: var(--background-color);
}

#messages::-webkit-scrollbar-thumb {
    background-color: var(--dark-green);
    border-radius: 4px;
    border: 1px solid var(--matrix-green);
}

.message {
    margin-bottom: 15px;
    line-height: 1.4;
}

.message strong {
    color: var(--matrix-green);
    text-transform: uppercase;
}

.thinking-indicator .dot {
    display: inline-block;
    width: 5px;
    height: 5px;
    background-color: var(--matrix-green);
    border-radius: 50%;
    margin-left: 3px;
    animation: blink 1.4s infinite both;
}

.thinking-indicator .dot:nth-child(2) {
    animation-delay: 0.2s;
}

.thinking-indicator .dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes blink {
    0% { opacity: 0.2; }
    20% { opacity: 1; }
    100% { opacity: 0.2; }
}

#input-container {
    display: flex;
    border-top: 2px solid var(--dark-green);
}

#user-input {
    flex-grow: 1;
    background: transparent;
    border: none;
    color: var(--matrix-green);
    padding: 15px;
    font-family: 'Matrix-Code', monospace;
    font-size: 1.2em;
}

#user-input:focus {
    outline: none;
    text-shadow: 0 0 8px var(--matrix-green);
}

#send-button {
    background: var(--dark-green);
    color: var(--background-color);
    border: none;
    padding: 0 25px;
    cursor: pointer;
    font-family: 'Matrix-Code', monospace;
    font-size: 1.2em;
    text-transform: uppercase;
    transition: background-color 0.3s, text-shadow 0.3s;
}

#send-button:hover:not(:disabled) {
    background: var(--matrix-green);
    text-shadow: 0 0 5px #000;
}

#send-button:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

#loader {
    position: absolute;
    bottom: 60px; /* Position above input */
    left: 0;
    width: 100%;
    padding: 10px;
    color: var(--matrix-green);
    text-align: center;
}

#progress-bar-container {
    width: 80%;
    height: 10px;
    border: 1px solid var(--matrix-green);
    margin: 10px auto 0 auto;
}

#progress-bar {
    width: 0%;
    height: 100%;
    background: var(--matrix-green);
}