html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #1a1a1a;
}

#loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #ffffff;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

#loading h1 {
    margin-bottom: 20px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid #333;
    border-top-color: #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

#norbert_canvas {
    width: 100%;
    height: 100%;
}

body.loaded #loading {
    display: none;
}

#wiring-schematic {
    --data: #4aa8ff;
    --control: #f2a93b;
    --spi: #74c991;

    position: fixed;
    z-index: 2;
    inset: 45px 0 29px;
    display: none;
    box-sizing: border-box;
    overflow: auto;
    padding: 24px clamp(18px, 4vw, 48px) 48px;
    color: #e8e8e8;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body.wiring-open #wiring-schematic {
    display: block;
}

#wiring-schematic h1 {
    margin: 0;
    font-size: 24px;
    font-weight: 600;
}

.wiring-subtitle {
    margin: 4px 0 22px;
    color: #9a9a9a;
    font-size: 14px;
}

.tang-dock {
    position: relative;
    width: min(1040px, 100%);
    min-width: 820px;
    margin: 0 auto;
    padding: 18px;
    box-sizing: border-box;
    border: 2px solid #59615d;
    border-radius: 8px;
    background: #202927;
    box-shadow: 0 10px 22px rgba(0, 0, 0, 0.22);
}

.sdram-module {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    width: 500px;
    height: 92px;
    margin: 0 auto 10px;
    box-sizing: border-box;
    padding: 13px 16px;
    border: 1px solid #4b5551;
    background: #242a29;
}

.memory-chip {
    display: grid;
    place-items: center;
    border: 1px solid #555b59;
    color: #7f8784;
    background: #171918;
    font: 9px ui-monospace, SFMono-Regular, Menlo, monospace;
}

.dock-main {
    position: relative;
    width: 500px;
    height: 205px;
    margin: auto;
    border: 1px solid #38423f;
    background: #25302d;
}

.usb-host {
    position: absolute;
    top: 52px;
    left: -9px;
    display: grid;
    place-items: center;
    width: 60px;
    height: 76px;
    border: 2px solid #aeb5b2;
    border-radius: 3px;
    color: #292929;
    background: #c9cecc;
    font-size: 9px;
    font-weight: 800;
}

.tang-core {
    position: absolute;
    top: 42px;
    left: 50%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 170px;
    height: 116px;
    box-sizing: border-box;
    padding: 16px;
    border: 2px solid #d4b65e;
    border-radius: 6px;
    color: #e8e2c9;
    background: #1c2422;
    transform: translateX(-50%) rotate(-1deg);
}

.tang-core small { font-weight: 700; }

.tang-core strong {
    font-size: 20px;
    letter-spacing: 0.06em;
}

.tang-core em {
    padding: 2px 4px;
    border: 1px solid #e8e2c9;
    font-size: 11px;
    font-style: normal;
}

.dock-controls {
    position: absolute;
    top: 12px;
    right: 10px;
    display: grid;
    justify-items: center;
    gap: 9px;
}

.button {
    display: grid;
    place-items: center;
    width: 24px;
    height: 24px;
    border: 2px solid #aeb4b1;
    border-radius: 4px;
    color: #777;
    background: #e0e3e2;
    font-size: 8px;
}

.usb-c {
    display: grid;
    place-items: center;
    width: 39px;
    height: 18px;
    margin-top: 8px;
    border: 2px solid #aeb4b1;
    border-radius: 5px;
    color: #222;
    background: #cbd0ce;
    font-size: 7px;
    font-weight: 800;
}

.pmod-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 28px;
}

.pmod-card {
    min-width: 0;
    padding: 12px;
    border: 1px solid #444d49;
    border-radius: 6px;
    background: rgba(15, 18, 17, 0.38);
}

.pmod-card h2 {
    margin: 0 0 9px;
    color: #e5e8e6;
    font: 700 13px ui-monospace, SFMono-Regular, Menlo, monospace;
}

.pmod-card h2 small {
    margin-left: 5px;
    color: #999f9c;
    font-size: 10px;
    font-weight: 500;
}

.pmod {
    display: grid;
    grid-template-columns: repeat(6, minmax(30px, 1fr));
    gap: 8px;
    padding: 11px;
    border: 2px solid #080909;
    border-radius: 4px;
    background: #111313;
}

.pin {
    display: grid;
    place-items: center;
    aspect-ratio: 1;
    box-sizing: border-box;
    border: 2px solid #5c625f;
    border-radius: 50%;
    color: #bcc2bf;
    background: #070808;
    font: 9px ui-monospace, SFMono-Regular, Menlo, monospace;
    cursor: default;
    transition: border-color 100ms, box-shadow 100ms, color 100ms;
}

.pmod-ft-data .pin:not(.power) { --pin-color: var(--data); }
.pmod-ft-control .pin:not(.power):not(.spare) { --pin-color: var(--control); }
.pmod-spi .pin:not(.power) { --pin-color: var(--spi); }
.pin.power { --pin-color: #b1b1b1; }
.pin.spare { --pin-color: #777; }

.pin:hover {
    border-color: var(--pin-color);
    color: #fff;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--pin-color) 25%, transparent);
}

.pin-legend {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 5px;
    margin: 10px 0 0;
    padding: 0;
    list-style: none;
}

.pin-legend li {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 36px;
    padding: 3px;
    border: 1px solid transparent;
    border-radius: 4px;
    color: #aeb3b0;
    font-size: 8px;
    text-align: center;
    transition: border-color 100ms, background-color 100ms, color 100ms;
}

.pin-legend b {
    color: #777d7a;
    font: 700 9px ui-monospace, SFMono-Regular, Menlo, monospace;
}

.pin-legend span {
    font-weight: 700;
    line-height: 1.1;
}

.pmod-card:has(.pin:nth-child(1):hover) .pin-legend li:nth-child(1),
.pmod-card:has(.pin:nth-child(2):hover) .pin-legend li:nth-child(2),
.pmod-card:has(.pin:nth-child(3):hover) .pin-legend li:nth-child(3),
.pmod-card:has(.pin:nth-child(4):hover) .pin-legend li:nth-child(4),
.pmod-card:has(.pin:nth-child(5):hover) .pin-legend li:nth-child(5),
.pmod-card:has(.pin:nth-child(6):hover) .pin-legend li:nth-child(6),
.pmod-card:has(.pin:nth-child(7):hover) .pin-legend li:nth-child(7),
.pmod-card:has(.pin:nth-child(8):hover) .pin-legend li:nth-child(8),
.pmod-card:has(.pin:nth-child(9):hover) .pin-legend li:nth-child(9),
.pmod-card:has(.pin:nth-child(10):hover) .pin-legend li:nth-child(10),
.pmod-card:has(.pin:nth-child(11):hover) .pin-legend li:nth-child(11),
.pmod-card:has(.pin:nth-child(12):hover) .pin-legend li:nth-child(12) {
    border-color: var(--pin-color, #aaa);
    color: #fff;
    background: rgba(255, 255, 255, 0.07);
}

.pmod-ft-data { --pin-color: var(--data); }
.pmod-ft-control { --pin-color: var(--control); }
.pmod-spi { --pin-color: var(--spi); }

.dock-label {
    margin-top: 13px;
    color: #d8ddd9;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-align: center;
}

@media (max-width: 900px) {
    .tang-dock {
        margin: 0;
    }
}