/* ================================
   8-bit Computer Simulator Styles
   ================================ */

.cpu-panel {
    background: var(--bg-card);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 10px;
    padding: 15px;
}

.panel-title {
    color: var(--accent-cyan);
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(0, 212, 255, 0.15);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ============ Bus Display ============ */
.bus-display {
    display: flex;
    gap: 4px;
    justify-content: center;
    padding: 12px;
    background: #000;
    border-radius: 8px;
    border: 2px solid #333;
    transition: all 0.3s;
}

    .bus-display.active {
        border-color: var(--accent-cyan);
        box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
    }

.bus-bit {
    width: 36px;
    height: 36px;
    background: #1a1a1a;
    border: 1px solid #333;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Consolas', monospace;
    font-weight: 700;
    color: #555;
    font-size: 16px;
    transition: all 0.2s;
    position: relative;
}

    .bus-bit::after {
        content: '0';
    }

    .bus-bit.on {
        background: var(--accent-cyan);
        color: #000;
        box-shadow: 0 0 10px var(--accent-cyan);
        border-color: var(--accent-cyan);
    }

        .bus-bit.on::after {
            content: '1';
        }

#busValue {
    background: var(--accent-cyan) !important;
    color: #000 !important;
    font-family: 'Consolas', monospace;
    font-weight: 700;
}

/* ============ Register Boxes ============ */
.register-box {
    background: linear-gradient(135deg, #2a2a4a, #1a1a2e);
    border: 2px solid #444;
    border-radius: 10px;
    padding: 12px;
    text-align: center;
    transition: all 0.3s;
    height: 100%;
}

    .register-box.active {
        border-color: var(--accent-yellow);
        box-shadow: 0 0 15px rgba(255, 215, 0, 0.5);
        transform: translateY(-2px);
    }

    .register-box.alu-special {
        background: linear-gradient(135deg, #4a1a5a, #2d0d3a);
        border-color: var(--accent-purple);
    }

        .register-box.alu-special.active {
            border-color: var(--accent-orange);
            box-shadow: 0 0 20px rgba(255, 136, 0, 0.6);
        }

.reg-label {
    color: var(--accent-cyan);
    font-size: 11px;
    font-weight: 700;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.reg-value {
    color: var(--accent-green);
    font-family: 'Consolas', monospace;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.reg-decimal {
    color: var(--accent-yellow);
    font-family: 'Consolas', monospace;
    font-size: 13px;
    font-weight: 700;
}

/* ============ Output Display ============ */
.output-display {
    background: #000;
    border: 3px solid var(--accent-red);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    box-shadow: inset 0 0 20px rgba(255, 0, 0, 0.2);
}

.output-decimal {
    color: var(--accent-red);
    font-family: 'Consolas', monospace;
    font-size: 56px;
    font-weight: 900;
    line-height: 1;
    text-shadow: 0 0 20px var(--accent-red);
    transition: all 0.3s;
}

    .output-decimal.flash {
        animation: outputFlash 0.5s;
    }

@keyframes outputFlash {
    0%, 100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.15);
        filter: brightness(1.5);
    }
}

.output-binary {
    color: var(--accent-yellow);
    font-family: 'Consolas', monospace;
    font-size: 16px;
    margin-top: 8px;
    letter-spacing: 2px;
}

/* ============ Control Word Grid ============ */
.control-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
}

.control-led {
    background: #1a1a1a;
    border: 1px solid #333;
    border-radius: 5px;
    padding: 6px 8px;
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: 'Consolas', monospace;
    font-size: 11px;
    transition: all 0.2s;
}

    .control-led .led-circle {
        width: 12px;
        height: 12px;
        border-radius: 50%;
        background: #2a0808;
        border: 1px solid #444;
        flex-shrink: 0;
        transition: all 0.2s;
    }

    .control-led.active {
        background: rgba(0, 255, 136, 0.15);
        border-color: var(--accent-green);
    }

        .control-led.active .led-circle {
            background: var(--accent-green);
            box-shadow: 0 0 8px var(--accent-green);
        }

    .control-led .led-name {
        color: #fff;
        font-weight: 700;
    }

    .control-led .led-desc {
        color: #888;
        font-size: 10px;
        margin-right: auto;
    }

body[dir="rtl"] .control-led .led-desc {
    margin-right: 0;
    margin-left: auto;
}

/* ============ RAM Grid ============ */
.ram-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3px;
    max-height: 400px;
    overflow-y: auto;
    padding: 4px;
}

.ram-row {
    display: grid;
    grid-template-columns: 35px 1fr 50px;
    gap: 6px;
    padding: 5px 8px;
    background: #1a1a1a;
    border: 1px solid #333;
    border-radius: 4px;
    align-items: center;
    font-family: 'Consolas', monospace;
    font-size: 11px;
    transition: all 0.2s;
}

    .ram-row.current-pc {
        border-color: var(--accent-yellow);
        background: rgba(255, 215, 0, 0.1);
        box-shadow: 0 0 8px rgba(255, 215, 0, 0.3);
    }

    .ram-row.accessed {
        border-color: var(--accent-cyan);
        background: rgba(0, 212, 255, 0.1);
    }

    .ram-row .ram-addr {
        color: var(--accent-yellow);
        font-weight: 700;
        text-align: center;
    }

    .ram-row .ram-val-binary {
        color: var(--accent-green);
        font-weight: 700;
        letter-spacing: 1px;
    }

    .ram-row .ram-val-hex {
        color: var(--accent-cyan);
        font-weight: 700;
        text-align: center;
    }

/* ============ Program Editor ============ */
.cpu-editor {
    width: 100%;
    background: #000;
    color: var(--accent-green);
    border: 1px solid var(--accent-cyan);
    border-radius: 6px;
    padding: 10px;
    font-family: 'Consolas', monospace;
    font-size: 13px;
    line-height: 1.6;
    resize: vertical;
}

    .cpu-editor:focus {
        outline: none;
        border-color: var(--accent-yellow);
        box-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
    }

/* ============ Form Controls ============ */
.form-select.bg-dark {
    background-color: #000 !important;
    color: var(--accent-cyan) !important;
}

.form-select.border-cyan {
    border-color: var(--accent-cyan);
}

.bg-cyan {
    background: var(--accent-cyan) !important;
}

.form-range::-webkit-slider-thumb {
    background: var(--accent-cyan);
}

.form-range::-moz-range-thumb {
    background: var(--accent-cyan);
}

/* ============ Instruction Reference ============ */
.instruction-ref .instr-card {
    background: #1a1a2e;
    border: 1px solid var(--accent-cyan);
    border-radius: 6px;
    padding: 10px;
    text-align: center;
    height: 100%;
    transition: all 0.2s;
}

    .instruction-ref .instr-card:hover {
        background: rgba(0, 212, 255, 0.1);
        transform: translateY(-2px);
    }

.instr-name {
    color: var(--accent-yellow);
    font-family: 'Consolas', monospace;
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 4px;
}

.instr-opcode {
    color: var(--accent-green);
    font-family: 'Consolas', monospace;
    font-size: 12px;
    margin-bottom: 4px;
}

.instr-desc {
    color: var(--text-secondary);
    font-size: 11px;
}

/* ============ Pulse Animation ============ */
.pulse-glow {
    animation: pulseGlow 0.6s;
}

@keyframes pulseGlow {
    0%, 100% {
        box-shadow: 0 0 0 transparent;
    }

    50% {
        box-shadow: 0 0 25px currentColor;
        filter: brightness(1.3);
    }
}

/* ============ Bit Animation when bus value changes ============ */
.bit-flash {
    animation: bitFlash 0.4s;
}

@keyframes bitFlash {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.2);
    }

    100% {
        transform: scale(1);
    }
}

/* ============ Responsive ============ */
@media (max-width: 1199px) {
    .control-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .output-decimal {
        font-size: 40px;
    }

    .bus-bit {
        width: 28px;
        height: 28px;
        font-size: 13px;
    }

    .control-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}