:root {
    /* PALETA DE COLORES  */
    --bg-color: #050505;
    --matrix-green: #00ff41;
    --matrix-dark: #003b00;
    --text-color: #e0e0e0;
    --alert-red: #ff003c;
    --grid-cols: 12;
}

* { box-sizing: border-box; }
button, input, textarea { font-family: inherit; }

body {
    background-color: var(--bg-color);
    color: var(--matrix-green);
    font-family: 'Silkscreen', cursive;
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    font-size: 14px;
    letter-spacing: -1px;
}

/* --- HEADER --- */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    border-bottom: 3px solid var(--matrix-green);
    gap: 20px;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 15px;
}

.main-logo {
    height: 32px;
    width: auto;
}

h1 {
    margin: 0;
    font-size: 1.8rem;
    letter-spacing: -2px;
    font-weight: 700;
}

/* --- TIMER --- */
.timer-box {
    font-size: 1.5rem;
    color: var(--alert-red);
    border: 3px solid var(--alert-red);
    padding: 5px 15px;
    border-radius: 0; 
    text-shadow: 0 0 5px var(--alert-red);
    box-shadow: 0 0 5px var(--alert-red);
}
.timer-box.hidden { display: none; }

.icon-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--matrix-green);
    margin-left: 15px;
    transition: color 0.2s;
}
.icon-btn:hover { color: #fff; text-shadow: 0 0 5px var(--matrix-green); }

/* --- MAIN LAYOUT --- */
.game-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    padding: 2rem;
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
}

@media (min-width: 768px) {
    .game-area {
        flex-direction: row;
        align-items: flex-start;
    }
}

/* --- MATRIZ --- */
.grid-section {
    flex: 2;
    display: flex;
    justify-content: center;
}

.binary-grid {
    display: grid;
    grid-template-columns: repeat(var(--grid-cols), 1fr);
    gap: 3px;
    background-color: var(--matrix-green); 
    border: 4px solid var(--matrix-green); 
    width: 100%;
    max-width: 550px;
    aspect-ratio: 1;
}

.cell {
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1rem;
    cursor: pointer;
    user-select: none;
    transition: background 0.1s;
}

.cell:hover { background-color: var(--matrix-dark); }

/* ESTADOS DE SELECCIÓN */
.cell.selected {
    background-color: var(--matrix-green);
    color: var(--bg-color);
}

.cell.correct {
    background-color: var(--matrix-dark);
    color: var(--matrix-green);
    box-shadow: inset 0 0 10px var(--matrix-green);
    font-weight: bold;
}

/* --- SECCIÓN DER: OBJETIVOS --- */
.panel-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.targets-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.target-chip {
    border: 3px solid var(--matrix-green);
    border-radius: 0; 
    padding: 12px 5px;
    text-align: center;
    font-size: 0.9rem;
    background: transparent;
    color: var(--text-color);
    word-break: break-all;
    transition: all 0.2s;
}

.target-chip.found {
    background-color: var(--matrix-green);
    color: var(--bg-color);
    text-decoration: line-through;
    opacity: 0.6;
}

/* ACTION BUTTONS */
.action-btn {
    background: transparent;
    border: 3px solid var(--matrix-green);
    color: var(--matrix-green);
    border-radius: 0;
    padding: 15px;
    font-size: 1rem;
    cursor: pointer;
    transition: 0.2s;
    margin-top: auto;
    text-transform: uppercase;
    box-shadow: 3px 3px 0px var(--matrix-dark); 
}

.action-btn:hover:not(:disabled) {
    background: var(--matrix-green);
    color: var(--bg-color);
    box-shadow: 1px 1px 0px var(--matrix-dark);
    transform: translate(2px, 2px);
}

.action-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    border-color: var(--matrix-dark);
    color: var(--matrix-dark);
}

/* --- MODALS --- */
.modal-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-color: rgba(5, 5, 5, 0.9);
    background-image: radial-gradient(var(--matrix-dark) 1px, transparent 1px);
    background-size: 4px 4px;
    
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-overlay.hidden { display: none; }

.modal-box {
    background-color: var(--bg-color);
    border: 4px solid var(--matrix-green);
    border-radius: 0;
    padding: 2rem;
    width: 90%;
    max-width: 500px;
    position: relative;
    text-align: center;
    box-shadow: 6px 6px 0px var(--matrix-dark); 
}

#modal-title {
    margin-top: 0;
    text-transform: uppercase;
    border-bottom: 3px solid var(--matrix-green);
    padding-bottom: 10px;
}

.modal-body {
    margin: 20px 0;
    font-size: 1rem;
    line-height: 1.4;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.modal-footer {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 25px;
}

.action-btn.small {
    padding: 10px 25px;
    font-size: 0.9rem;
    margin-top: 0;
}

.action-btn.cancel {
    border-color: var(--alert-red);
    color: var(--alert-red);
    box-shadow: 3px 3px 0px #500014;
}

.action-btn.cancel:hover {
    background-color: var(--alert-red);
    color: var(--bg-color);
    box-shadow: 1px 1px 0px #500014;
}

.stats-table {
    width: 100%;
    border-collapse: collapse;
    border: 3px solid var(--matrix-green);
}

.stats-table td {
    border: 2px solid var(--matrix-green);
    padding: 10px;
    text-align: left;
}

.stats-table td:last-child { text-align: right; font-weight: bold; }

.config-form {
    text-align: left;
    width: 100%;
}

.config-group { margin-bottom: 20px; }

.config-group h3 {
    border-bottom: 2px solid var(--matrix-green);
    margin-bottom: 15px;
    padding-bottom: 5px;
}
.radio-label {
    display: flex;
    align-items: center; 
    margin: 15px 0;
    cursor: pointer;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.radio-label:hover {
    color: #fff;
}

.radio-label input[type="radio"] {
    appearance: none;         
    -webkit-appearance: none;
    width: 20px;               
    height: 20px;
    border: 2px solid var(--matrix-green);
    border-radius: 0;          
    background-color: transparent;
    margin-right: 15px;       
    cursor: pointer;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* ESTADO SELECCIONADO (Checked) */
.radio-label input[type="radio"]:checked {
    background-color: var(--matrix-green);
    box-shadow: inset 0 0 0 4px var(--bg-color); 
}

.radio-label input[type="radio"]:hover {
    background-color: var(--matrix-dark);
}

/* --- FOOTER --- */
footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap; 
    padding: 1.5rem 2rem;
    font-size: 0.8rem;
    border-top: 3px solid var(--matrix-green);
    background-color: var(--bg-color);
    margin-top: auto; 
    gap: 15px;
}

.footer-left p {
    margin: 0;
    opacity: 0.8;
}

.footer-right {
    display: flex;
    gap: 15px;
    align-items: center;
}

.social-link {
    color: var(--matrix-green);
    text-decoration: none; 
    font-weight: bold;
    text-transform: uppercase;
    transition: all 0.2s;
    border-bottom: 2px solid transparent; 
}

.social-link:hover {
    color: #fff;
    text-shadow: 0 0 5px var(--matrix-green);
    border-bottom: 2px solid var(--matrix-green); 
}

.separator {
    color: var(--matrix-dark);
}

@media (max-width: 600px) {
    footer {
        flex-direction: column;
        justify-content: center;
        text-align: center;
    }
}

.close-btn {
    display: none !important;
}