:root {
    --bg-color: #f8f9fa;
    --main-border: #000000;
    --box-bg: rgba(255, 255, 255, 0.35);
    --active-bg: rgba(0, 0, 0, 0.15);
    --text-color: #000000;
    --line-color: #000000;
    --font-main: 'Times New Roman', Times, serif;
    --glass-blur: blur(50px);
    --glass-border: 1px solid rgba(0, 0, 0, 0.2);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --accent: #2d6cdf;
    --accent-glow: rgba(45, 108, 223, 0.15);
    --subtract-color: #d94455;
    --add-color: #28a060;
    --shift-color: #e6a817;
}

body {
    font-family: var(--font-main);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100vw;
    min-height: 100vh;
    overflow: hidden;
    user-select: none;
    background-color: #f4f7fa;
    background-image:
        linear-gradient(rgba(170, 180, 190, 0.25) 1px, transparent 1px),
        linear-gradient(90deg, rgba(170, 180, 190, 0.25) 1px, transparent 1px);
    background-size: 40px 40px;
    background-position: center center;
}

.container {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 1650px;
    height: 950px;
    background: transparent;
    border: none;
    box-shadow: none;
    margin: 0;
    transition: left 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.circuit-wrapper {
    position: absolute;
    top: 40px;
    left: 30px;
    width: 900px;
    height: 750px;
}

#connections {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    overflow: visible;
}

line,
polyline,
path {
    stroke: var(--line-color);
    stroke-width: 1.5;
    fill: none;
}

.arrowhead {
    fill: var(--line-color);
}

.booth-enclosure {
    position: absolute;
    top: 80px;
    left: 200px;
    width: 500px;
    height: 600px;
    border: 2px solid rgba(0, 0, 0, 0.3);
    z-index: 2;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: 16px;
    box-shadow: var(--glass-shadow);
}

.block {
    position: absolute;
    background: rgba(200, 220, 255, 0.3);
    border: 2px solid rgba(0, 0, 0, 0.25);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    font-size: 1rem;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 12px;
    box-shadow: var(--glass-shadow);
    text-align: center;
    gap: 6px;
    padding: 8px;
}

.reg-bits {
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    letter-spacing: 3px;
    color: var(--accent);
    font-weight: bold;
}

.sub-label {
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.block-m-reg {
    top: 20px;
    left: 150px;
    width: 200px;
    height: 75px;
}

.block-addsub {
    top: 120px;
    left: 80px;
    width: 340px;
    height: 75px;
    transition: background 0.3s, border-color 0.3s;
}

.block-a-reg {
    top: 220px;
    left: 150px;
    width: 200px;
    height: 75px;
}

.block-shift {
    top: 320px;
    left: 80px;
    width: 340px;
    height: 60px;
}

.block-q-reg {
    top: 410px;
    left: 100px;
    width: 200px;
    height: 75px;
}

.block-q1 {
    top: 410px;
    left: 320px;
    width: 80px;
    height: 75px;
}

.block-control {
    top: 510px;
    left: 180px;
    width: 220px;
    height: 60px;
}

.block-counter {
    top: 510px;
    left: 100px;
    width: 60px;
    height: 60px;
    border-radius: 12px;
}

.pill-shape {
    background: rgba(255, 255, 255, 0.5);
    border-radius: 20px;
    padding: 5px 18px;
    border: 1px solid rgba(0, 0, 0, 0.2);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    font-weight: normal;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    font-size: 0.9rem;
    white-space: nowrap;
}

.io-node {
    position: absolute;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    z-index: 10;
}

.io-label {
    font-weight: bold;
}

.io-value {
    width: 25px;
    height: 25px;
    border: 1px solid var(--main-border);
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    transition: all 0.2s;
    font-family: var(--font-main);
    z-index: 10;
    border-radius: 6px;
}

.io-value.active {
    background: #000;
    color: #fff;
}

.input-group {
    position: absolute;
    background: rgba(230, 210, 240, 0.3);
    border: 2px solid rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--glass-shadow);
    z-index: 1;
    display: flex;
    align-items: center;
}

.input-group-label {
    position: absolute;
    left: -110px;
    font-weight: bold;
    font-size: 0.95rem;
    color: var(--text-color);
    transform: rotate(-90deg);
    letter-spacing: 2px;
    text-transform: uppercase;
    white-space: nowrap;
}

.group-multiplicand {
    left: 5px;
    top: 95px;
    width: 75px;
    height: 290px;
}

.group-multiplier {
    left: 5px;
    top: 460px;
    width: 75px;
    height: 290px;
}

.in-m3 {
    left: 22px;
    top: 120px;
}

.in-m2 {
    left: 22px;
    top: 195px;
}

.in-m1 {
    left: 22px;
    top: 270px;
}

.in-m0 {
    left: 22px;
    top: 345px;
}

.in-q3 {
    left: 22px;
    top: 485px;
}

.in-q2 {
    left: 22px;
    top: 560px;
}

.in-q1 {
    left: 22px;
    top: 635px;
}

.in-q0 {
    left: 22px;
    top: 710px;
}

.group-output {
    right: 0px;
    top: 95px;
    width: 75px;
    height: 620px;
    background: rgba(210, 235, 230, 0.3);
}

.group-output .input-group-label {
    left: auto;
    right: -80px;
    transform: rotate(90deg);
}

.output-label {
    left: auto !important;
    right: -70px !important;
    transform: rotate(90deg) !important;
}

.out-p7 {
    right: 8px;
    top: 120px;
    flex-direction: row-reverse;
}

.out-p6 {
    right: 8px;
    top: 195px;
    flex-direction: row-reverse;
}

.out-p5 {
    right: 8px;
    top: 270px;
    flex-direction: row-reverse;
}

.out-p4 {
    right: 8px;
    top: 345px;
    flex-direction: row-reverse;
}

.out-p3 {
    right: 8px;
    top: 420px;
    flex-direction: row-reverse;
}

.out-p2 {
    right: 8px;
    top: 495px;
    flex-direction: row-reverse;
}

.out-p1 {
    right: 8px;
    top: 570px;
    flex-direction: row-reverse;
}

.out-p0 {
    right: 8px;
    top: 645px;
    flex-direction: row-reverse;
}

.output-bit {
    cursor: default !important;
    transition: all 0.3s;
}

.output-bit.active {
    background: #000 !important;
    border-color: #000 !important;
    color: #fff !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.4) !important;
}

.run-btn {
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(45, 108, 223, 0.12);
    border: 2px solid var(--accent);
    color: var(--accent);
    padding: 12px 50px;
    border-radius: 30px;
    font-family: var(--font-main);
    font-weight: bold;
    font-size: 1.3rem;
    cursor: pointer;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: all 0.25s;
    box-shadow: 0 4px 20px var(--accent-glow);
    letter-spacing: 3px;
    text-transform: uppercase;
    z-index: 20;
}

.run-btn:hover {
    background: var(--accent);
    color: #fff;
    transform: translateX(-50%) translateY(-2px);
    box-shadow: 0 8px 30px rgba(45, 108, 223, 0.35);
}

.iteration-panel {
    position: absolute;
    top: 90px;
    left: 1000px;
    width: 450px;
    background: rgba(255, 255, 255, 0.35);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 2px solid rgba(0, 0, 0, 0.2);
    border-radius: 16px;
    box-shadow: var(--glass-shadow);
    z-index: 15;
    overflow: hidden;
}

.panel-title {
    text-align: center;
    font-weight: bold;
    font-size: 1.4rem;
    padding: 14px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.15);
    letter-spacing: 2px;
    background: rgba(255, 255, 255, 0.25);
}

.table-scroll {
    max-height: 480px;
    overflow-y: auto;
    padding: 0 10px;
}

.table-scroll::-webkit-scrollbar {
    width: 8px;
}

.table-scroll::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
}

.table-scroll::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
}

.iteration-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 1rem;
}

.iteration-table th,
.iteration-table td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    font-family: 'Courier New', monospace;
}

.iteration-table th {
    font-family: var(--font-main);
    background: rgba(0, 0, 0, 0.08);
    font-weight: bold;
    position: sticky;
    top: 0;
    z-index: 2;
    letter-spacing: 1px;
}

.iteration-table tbody tr {
    transition: background 0.15s;
}

.iteration-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.5);
}

.iteration-table .empty-row td {
    text-align: center;
    font-family: var(--font-main);
    color: rgba(0, 0, 0, 0.4);
    font-style: italic;
    padding: 30px 0;
}

.iteration-table tr.row-add td:last-child {
    color: var(--add-color);
    font-weight: bold;
}

.iteration-table tr.row-sub td:last-child {
    color: var(--subtract-color);
    font-weight: bold;
}

.iteration-table tr.row-shift td:last-child {
    color: var(--shift-color);
    font-weight: bold;
}

.iteration-table tr.row-init td:last-child {
    color: var(--accent);
    font-weight: bold;
}

.result-row {
    display: flex;
    justify-content: center;
    gap: 10px;
    padding: 14px;
    border-top: 2px solid rgba(0, 0, 0, 0.15);
    font-size: 1.2rem;
    font-weight: bold;
    background: rgba(255, 255, 255, 0.25);
    letter-spacing: 1px;
}

#product-binary {
    font-family: 'Courier New', monospace;
    color: var(--accent);
}

#product-decimal {
    color: rgba(0, 0, 0, 0.5);
}

.hud {
    position: absolute;
    bottom: 20px;
    left: 1000px;
    border: 1px solid rgba(0, 0, 0, 0.2);
    padding: 20px 22px;
    background: rgba(255, 255, 255, 0.35);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-radius: 12px;
    width: 405px;
    z-index: 20;
    box-shadow: var(--glass-shadow);
    font-size: 1.15rem;
}

.hud-title {
    font-weight: bold;
    border-bottom: 1px solid #000;
    margin-bottom: 15px;
    padding-bottom: 5px;
    text-align: center;
    font-size: 1.4rem;
}

.hud-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.equation {
    font-style: italic;
    text-align: center;
    margin-top: 15px;
    font-size: 1.3rem;
    border-top: 1px dashed #000;
    padding-top: 10px;
}

path.pulse {
    stroke-width: 2.5;
    stroke-dasharray: 5, 5;
    animation: dash 1s linear infinite;
}

@keyframes dash {
    to {
        stroke-dashoffset: -10;
    }
}

svg {
    position: absolute;
}

.page-header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.15);
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-color);
    letter-spacing: 5px;
    z-index: 100;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

.page-footer {
    position: absolute;
    bottom: 20px;
    width: 100%;
    text-align: center;
    font-size: 1rem;
    color: var(--text-color);
    letter-spacing: 2px;
    z-index: 100;
    opacity: 0.6;
}

.page-footer a {
    text-decoration: none;
    color: inherit;
}

.glass-btn {
    position: absolute;
    right: 40px;
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(0, 0, 0, 0.2);
    padding: 10px 20px;
    border-radius: 8px;
    font-family: var(--font-main);
    font-weight: bold;
    font-size: 1.1rem;
    cursor: pointer;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    transition: all 0.2s;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.glass-btn:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: translateY(-2px);
}

.side-panel {
    position: fixed;
    top: 0;
    right: -500px;
    width: 450px;
    height: 100vh;
    background: rgba(235, 240, 245, 0.85);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-left: 2px solid rgba(0, 0, 0, 0.2);
    box-shadow: -8px 0 32px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: right 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    display: flex;
    flex-direction: column;
}

.side-panel.open {
    right: 0;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    border-bottom: 2px solid rgba(0, 0, 0, 0.1);
    background: rgba(255, 255, 255, 0.4);
}

.panel-header h2 {
    margin: 0;
    font-size: 1.8rem;
    letter-spacing: 2px;
}

.close-btn {
    background: transparent;
    border: none;
    font-size: 2.5rem;
    cursor: pointer;
    color: var(--text-color);
    line-height: 1;
    transition: transform 0.2s;
}

.close-btn:hover {
    transform: scale(1.2);
}

.panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.panel-content h3 {
    letter-spacing: 1px;
    margin-bottom: 15px;
    padding-bottom: 5px;
    border-bottom: 1px dashed rgba(0, 0, 0, 0.3);
}

.panel-content h4 {
    margin: 12px 0 8px;
}

.panel-content p,
.panel-content li {
    font-size: 1rem;
    line-height: 1.6;
}

.panel-content ol {
    padding-left: 20px;
}

.panel-content ul {
    padding-left: 18px;
}

.panel-content code {
    background: rgba(0, 0, 0, 0.08);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
}

.info-section {
    margin-bottom: 20px;
}

.truth-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 8px;
    overflow: hidden;
    font-size: 0.9rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.truth-table th,
.truth-table td {
    border: 1px solid rgba(0, 0, 0, 0.3);
    padding: 8px 6px;
    text-align: center;
}

.truth-table th {
    background: rgba(0, 0, 0, 0.15);
    font-weight: bold;
}

.truth-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.9);
}

.panel-content::-webkit-scrollbar {
    width: 10px;
}

.panel-content::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
}

.panel-content::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 5px;
}

.theme-toggle-btn {
    position: fixed;
    bottom: 20px;
    left: 20px;
    z-index: 200;
    background: transparent;
    border: none;
    width: 32px;
    height: 32px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-color);
    padding: 0;
    transition: all 0.2s;
}

.theme-toggle-btn:hover {
    transform: scale(1.1);
}

.theme-toggle-btn svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
    transition: transform 0.2s;
}

.block.highlight-add {
    border-color: var(--add-color) !important;
    background: rgba(40, 160, 96, 0.15) !important;
    box-shadow: 0 0 20px rgba(40, 160, 96, 0.2);
}

.block.highlight-sub {
    border-color: var(--subtract-color) !important;
    background: rgba(217, 68, 85, 0.15) !important;
    box-shadow: 0 0 20px rgba(217, 68, 85, 0.2);
}

.block.highlight-shift {
    border-color: var(--shift-color) !important;
    background: rgba(230, 168, 23, 0.15) !important;
    box-shadow: 0 0 20px rgba(230, 168, 23, 0.2);
}

body.dark-mode {
    --bg-color: #121212;
    --main-border: rgba(255, 255, 255, 0.418);
    --box-bg: #121212;
    --active-bg: rgba(0, 0, 0, 0.35);
    --text-color: #BBE1FA;
    --line-color: #ffffff93;
    --accent: #5ba8ff;
    --accent-glow: rgba(91, 168, 255, 0.2);
    background-color: var(--bg-color);
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(66, 66, 66, 0.08) 1px, transparent 1px);
    color: var(--text-color);
}

body.dark-mode .booth-enclosure,
body.dark-mode .block,
body.dark-mode .input-group,
body.dark-mode .hud,
body.dark-mode .page-header,
body.dark-mode .iteration-panel,
body.dark-mode .truth-table,
body.dark-mode .side-panel {
    background: var(--box-bg);
    border-color: var(--main-border);
    color: var(--text-color);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

body.dark-mode .panel-header {
    background: rgba(30, 35, 45, 0.7);
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

body.dark-mode .hud-title {
    border-bottom: 1px solid var(--main-border);
}

body.dark-mode .equation {
    border-top: 1px dashed var(--main-border);
}

body.dark-mode .truth-table th {
    background: rgba(255, 255, 255, 0.1);
}

body.dark-mode .panel-title,
body.dark-mode .result-row {
    background: #121212;
    border-color: var(--main-border);
}

body.dark-mode .iteration-table th {
    background: rgba(0, 0, 0, 0.5);
    border-bottom: 1px solid var(--main-border);
}

body.dark-mode .iteration-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.1);
}

body.dark-mode .iteration-table td {
    border-bottom: 1px dashed rgba(255, 255, 255, 0.15);
}

body.dark-mode .truth-table th,
body.dark-mode .truth-table td {
    border-color: rgba(255, 255, 255, 0.15);
}

body.dark-mode .truth-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.1);
}

body.dark-mode .io-value {
    background: rgba(40, 45, 55, 1);
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--text-color);
}

body.dark-mode .io-value.active {
    background: rgba(181, 244, 255, 0.3);
    border-color: #88bbff;
    color: #ffffff;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.5);
}

body.dark-mode .pill-shape {
    background: rgba(40, 45, 55, 0.8);
    border-color: rgba(255, 255, 255, 0.15);
}

body.dark-mode .glass-btn {
    background: rgba(30, 35, 45, 0.65);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-color);
}

body.dark-mode .glass-btn:hover {
    background: rgba(60, 70, 85, 0.8);
}

body.dark-mode .run-btn {
    background: rgba(91, 168, 255, 0.15);
    border-color: var(--accent);
    color: var(--accent);
}

body.dark-mode .run-btn:hover {
    background: var(--accent);
    color: #111;
}

body.dark-mode circle {
    fill: var(--text-color) !important;
}

body.dark-mode path.arrowhead {
    fill: var(--line-color) !important;
}

body.dark-mode path,
body.dark-mode line,
body.dark-mode polyline {
    stroke: var(--line-color);
}

body.dark-mode .panel-title {
    border-bottom-color: rgba(255, 255, 255, 0.15);
}

body.dark-mode .iteration-table th {
    background: rgba(255, 255, 255, 0.08);
}

body.dark-mode .iteration-table th,
body.dark-mode .iteration-table td {
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

body.dark-mode .iteration-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.06);
}

body.dark-mode .iteration-table .empty-row td {
    color: rgba(255, 255, 255, 0.3);
}

body.dark-mode .result-row {
    border-top-color: rgba(255, 255, 255, 0.15);
}

body.dark-mode #product-decimal {
    color: rgba(255, 255, 255, 0.4);
}

body.dark-mode .panel-content code {
    background: rgba(255, 255, 255, 0.1);
}

@keyframes rowSlideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.iteration-table tbody tr.animate-in {
    animation: rowSlideIn 0.4s ease-out;
}

@keyframes blockPulse {
    0% {
        box-shadow: var(--glass-shadow);
    }

    50% {
        box-shadow: 0 0 25px rgba(45, 108, 223, 0.3);
    }

    100% {
        box-shadow: var(--glass-shadow);
    }
}

.block.active-pulse {
    animation: blockPulse 0.6s ease-in-out;
}