/* ==========================================================================
   Retro486 Socket 3 Motherboard PCB & Expansion Slot Styling
   ========================================================================== */

.motherboard-layout-grid {
    display: grid;
    grid-template-columns: 1.75fr 1fr;
    gap: 20px;
    align-items: start;
}

@media (max-width: 1020px) {
    .motherboard-layout-grid {
        grid-template-columns: 1fr;
    }
}

.motherboard-pcb {
    background-color: #14492b;
    background-image:
        radial-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 215, 0, 0.03) 1px, transparent 1px),
        linear-gradient(rgba(255, 215, 0, 0.03) 1px, transparent 1px);
    background-size: 16px 16px, 32px 32px, 32px 32px;
    border: 4px solid #c5a03f;
    border-radius: 10px;
    padding: 20px;
    box-shadow:
        0 14px 36px rgba(0, 0, 0, 0.75),
        inset 0 0 30px rgba(0, 0, 0, 0.45);
    position: relative;
}

.motherboard-pcb.theme-amber {
    background-color: #5e4315;
}

.motherboard-pcb.theme-stealth {
    background-color: #161b22;
}

.pcb-silkscreen-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid rgba(255, 255, 255, 0.25);
    padding-bottom: 8px;
    margin-bottom: 16px;
    font-size: 12px;
    color: #e8f5e9;
    letter-spacing: 1px;
}

/* ==========================================================================
   Upper PCB Section: CPU Socket 3, SIMM RAM Banks, BIOS ROM, Chipset
   ========================================================================== */

.pcb-upper-deck {
    display: grid;
    grid-template-columns: 180px 1fr 180px;
    gap: 16px;
    margin-bottom: 20px;
}

@media (max-width: 760px) {
    .pcb-upper-deck {
        grid-template-columns: 1fr;
    }
}

/* Socket 3 i486 CPU */
.cpu-socket3 {
    background: #d9d2c5;
    border: 3px solid #aba292;
    border-radius: 6px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.6);
}

.cpu-ceramic-package {
    background: #47384d;
    border: 3px solid #d4af37;
    width: 126px;
    height: 126px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #f3e5ab;
    padding: 8px;
    box-shadow: inset 0 0 12px rgba(0,0,0,0.7);
}

.cpu-die-label {
    font-size: 13px;
    font-weight: bold;
    border-bottom: 1px solid #d4af37;
    padding-bottom: 4px;
    margin-bottom: 4px;
}

.cpu-sub-label {
    font-size: 10px;
    color: #ddd;
}

/* SIMM RAM Banks */
.simm-banks-box {
    background: rgba(0, 0, 0, 0.28);
    border: 1px dashed rgba(255, 255, 255, 0.35);
    border-radius: 6px;
    padding: 10px 14px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.simm-stick {
    background: linear-gradient(90deg, #1b5e20, #2e7d32);
    border: 1px solid #e0e0e0;
    border-left: 5px solid #cfd8dc;
    border-right: 5px solid #cfd8dc;
    padding: 5px 10px;
    border-radius: 3px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
    color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.5);
}

.simm-chips {
    display: flex;
    gap: 4px;
}

.simm-ic {
    width: 12px;
    height: 14px;
    background: #1a1a1a;
    border: 1px solid #555;
    display: inline-block;
}

/* Chipset, BIOS ROM & RTC */
.chipset-column {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ic-chip-box {
    background: #181a1c;
    border: 2px solid #555;
    border-radius: 4px;
    padding: 8px;
    color: #d0d7de;
    font-size: 11px;
    text-align: center;
    box-shadow: 0 3px 6px rgba(0,0,0,0.6);
}

.ic-chip-box.bios-rom {
    background: linear-gradient(135deg, #2b2212, #1a150b);
    border-color: #d4af37;
    color: #ffd700;
}

.post-7seg-box {
    background: #120606;
    border: 2px solid #6b1d1d;
    border-radius: 4px;
    padding: 6px 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.seven-seg-digits {
    font-size: 22px;
    font-weight: bold;
    color: #ff2222;
    text-shadow: 0 0 10px #ff0000;
    letter-spacing: 3px;
    font-family: 'Courier New', monospace;
}

/* ==========================================================================
   Expansion Slots (ISA-8, ISA-16, VESA Local Bus)
   ========================================================================== */

.expansion-slots-stack {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.expansion-slot {
    background: rgba(0, 0, 0, 0.35);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    padding: 8px 12px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.expansion-slot:hover {
    border-color: #ffd700;
    background: rgba(0, 0, 0, 0.5);
}

.expansion-slot.selected {
    border-color: var(--accent-green);
    box-shadow: 0 0 14px rgba(0, 255, 102, 0.3);
}

.expansion-slot.vlb-slot {
    border-left: 6px solid #a1622f;
}

.slot-header {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: #c8e6c9;
    margin-bottom: 6px;
}

.slot-bus-badge {
    background: #1c242b;
    color: #ffd700;
    padding: 1px 6px;
    border-radius: 3px;
    border: 1px solid #6e5a23;
}

.inserted-card-pcb {
    border: 2px solid #99823c;
    border-radius: 5px;
    padding: 8px 12px;
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.6);
}

.card-edge-bracket {
    width: 8px;
    height: 44px;
    background: linear-gradient(180deg, #d0d5dd, #8a93a2);
    border-radius: 2px;
}

.card-body-content {
    flex: 1;
}

.card-title-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: #fff;
    margin-bottom: 6px;
}

.card-leds {
    display: flex;
    gap: 10px;
    font-size: 11px;
}

.card-chips-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.card-chip {
    background: #16181d;
    color: #b0bac5;
    border: 1px solid #484f58;
    padding: 2px 7px;
    border-radius: 3px;
    font-size: 10px;
}

.empty-slot-socket {
    background: #111315;
    border: 2px inset #2c3136;
    padding: 10px;
    text-align: center;
    color: #7d8590;
    font-size: 12px;
    border-radius: 4px;
}

/* ==========================================================================
   Right Column: Slot Inspector & Live Bus Telemetry Panel
   ========================================================================== */

.motherboard-side-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.inspector-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
}

.inspector-header {
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    margin-bottom: 10px;
}

.inspector-desc {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 12px;
    line-height: 1.4;
}

.inspector-specs {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 12px;
    background: #0d1117;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #262c36;
}

.inspector-specs div {
    display: flex;
    justify-content: space-between;
}

.inspector-specs span {
    color: var(--text-muted);
}

.inspector-section-title {
    font-size: 12px;
    font-weight: bold;
    color: var(--accent-amber);
    margin: 14px 0 8px 0;
}

.jumper-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.jumper-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 11px;
}

.bus-led-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.bus-led-pill {
    background: #0d1117;
    border: 1px solid #282f3a;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    display: flex;
    align-items: center;
    gap: 5px;
}