:root {
  --black: #000000;
  --surface: #050505;
  --surface-raised: #0a0a0a;
  --hover: #171717;
  --border-subtle: #1f1f1f;
  --border: #2a2a2a;
  --border-strong: #525252;
  --white: #ffffff;
  --text: #ffffff;
  --text-strong: #e5e5e5;
  --text-muted: #a3a3a3;
  --text-dim: #737373;
  --font-mono: "JetBrains Mono", Consolas, Monaco, "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--black);
  color: var(--text);
  font-family: var(--font-mono);
  line-height: 1.5;
}

button,
input {
  font: inherit;
}

a {
  color: var(--text);
  text-decoration: none;
}

a:hover {
  color: var(--text-muted);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--border);
  background: var(--black);
  padding: 14px 24px;
}

.topbar__brand {
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
}

.topbar__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
  font-size: 12px;
}

.section {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 36px 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 20px;
  align-items: end;
  min-height: 430px;
  border-bottom: 1px solid var(--border-subtle);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
  line-height: 1.1;
}

h1 {
  max-width: 780px;
  font-size: clamp(36px, 7vw, 74px);
}

h2 {
  font-size: clamp(22px, 3vw, 34px);
}

.hero__subtitle,
.intro p {
  max-width: 760px;
  color: var(--text-strong);
  font-size: 15px;
}

.hero__actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.hero__status {
  display: grid;
  gap: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 14px;
  color: var(--text-muted);
  font-size: 12px;
}

.section-heading {
  margin-bottom: 18px;
}

.algorithm-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.panel {
  border: 1px solid var(--border);
  background: var(--surface);
}

.panel__header {
  border-bottom: 1px solid var(--border-subtle);
  padding: 11px 12px;
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
}

.panel__body {
  padding: 14px;
}

.algorithm-card p {
  margin: 0 0 10px;
  color: var(--text-strong);
  font-size: 13px;
}

.algorithm-card p:last-child {
  margin-bottom: 0;
}

.algorithm-card strong {
  color: var(--white);
  font-weight: 700;
}

.process-form {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
}

input {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--border);
  border-radius: 0;
  background: var(--black);
  color: var(--white);
  padding: 8px 10px;
  outline: none;
}

input::placeholder {
  color: var(--text-dim);
}

input:focus {
  border-color: var(--white);
}

.process-message {
  min-height: 20px;
  margin-top: 14px;
  color: var(--text-muted);
  font-size: 12px;
}

.process-message[data-tone="error"] {
  color: var(--white);
}

.process-message[data-tone="success"] {
  color: var(--text-strong);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  border: 1px solid var(--border-strong);
  border-radius: 0;
  padding: 8px 12px;
  cursor: pointer;
  letter-spacing: 0;
  text-transform: uppercase;
}

.button--primary {
  border-color: var(--white);
  background: var(--white);
  color: var(--black);
  font-weight: 700;
}

.button--secondary {
  background: var(--black);
  color: var(--white);
}

.button--ghost {
  border-color: var(--border);
  background: transparent;
  color: var(--text-muted);
}

.button:hover {
  border-color: var(--white);
  background: var(--hover);
  color: var(--white);
}

.button--primary:hover {
  background: var(--text-strong);
  color: var(--black);
}

.process-table-shell {
  margin-top: 18px;
  overflow-x: auto;
  border: 1px solid var(--border);
  background: var(--black);
}

.process-table {
  width: 100%;
  border-collapse: collapse;
  color: var(--text-strong);
  font-size: 12px;
}

.process-table th,
.process-table td {
  border-bottom: 1px solid var(--border-subtle);
  padding: 10px 12px;
  text-align: left;
  white-space: nowrap;
}

.process-table th {
  color: var(--white);
  font-weight: 700;
}

.process-table tbody tr {
  cursor: pointer;
}

.process-table tbody tr:hover,
.process-table tbody tr[aria-selected="true"] {
  background: var(--hover);
  color: var(--white);
}

.process-table tbody tr:focus {
  outline: 1px solid var(--white);
  outline-offset: -1px;
}

.process-table__empty {
  color: var(--text-dim);
  text-align: center;
}

.workspace-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.placeholder-panel--wide {
  grid-column: 1 / -1;
}

.placeholder-box {
  display: grid;
  min-height: 150px;
  place-items: center;
  border: 1px dashed var(--border-strong);
  background: var(--black);
  color: var(--text-dim);
  font-size: 13px;
  text-align: center;
}

.visualization-box {
  display: block;
  place-items: initial;
  width: 100%;
  overflow-x: auto;
  text-align: left;
}

.visualization-empty {
  display: grid;
  min-height: 120px;
  place-items: center;
  color: var(--text-dim);
  text-align: center;
}

.simulation-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.speed-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.speed-control[data-active="true"] {
  border-color: var(--white);
  color: var(--white);
}

.gantt-chart {
  min-width: 520px;
}

.gantt-track {
  display: flex;
  min-height: 74px;
  border: 1px solid var(--border-strong);
  background: var(--black);
}

.gantt-block {
  display: grid;
  min-width: 56px;
  place-items: center;
  border-right: 1px solid var(--border-strong);
  background: var(--black);
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 700;
  opacity: 0.22;
  transform: scaleY(0.82);
  transition: opacity 180ms ease-out, transform 180ms ease-out, background 180ms ease-out;
}

.gantt-block:last-child {
  border-right: 0;
}

.gantt-idle-block {
  min-width: 24px;
  border-right: 1px dashed var(--border);
  background: var(--black);
}

.gantt-block[data-visible="true"] {
  color: var(--white);
  opacity: 1;
  transform: scaleY(1);
}

.gantt-block[data-active="true"] {
  background: var(--hover);
  box-shadow: inset 0 0 0 1px var(--white);
}

.gantt-timestamps {
  position: relative;
  height: 30px;
  margin-top: 8px;
}

.gantt-timestamp {
  position: absolute;
  top: 0;
  color: var(--text-muted);
  font-size: 11px;
  transform: translateX(-50%);
}

.gantt-timestamp:first-child {
  transform: translateX(0);
}

.gantt-timestamp:last-child {
  transform: translateX(-100%);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.metric-card {
  border: 1px solid var(--border);
  background: var(--black);
  padding: 12px;
}

.metric-card__label {
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.metric-card__value {
  margin-top: 7px;
  color: var(--white);
  font-size: 20px;
  font-weight: 700;
}

.results-table-shell {
  overflow-x: auto;
  padding-bottom: 2px;
}

.table-section-title {
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 10px;
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.results-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  border: 1px solid var(--border-strong);
  color: var(--text-strong);
  font-size: 12px;
  table-layout: fixed;
}

.results-table th,
.results-table td {
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
  white-space: nowrap;
}

.results-table th:last-child,
.results-table td:last-child {
  border-right: 0;
}

.results-table tbody tr:last-child td {
  border-bottom: 0;
}

.results-table th {
  background: var(--black);
  color: var(--white);
  font-weight: 700;
}

.results-table td:not(:first-child),
.results-table th:not(:first-child) {
  text-align: right;
}

.comparison-output {
  overflow-x: auto;
  padding-bottom: 2px;
}

.comparison-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  border: 1px solid var(--border-strong);
  color: var(--text-strong);
  font-size: 12px;
  table-layout: fixed;
}

.comparison-table th,
.comparison-table td {
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
  white-space: nowrap;
}

.comparison-table th:last-child,
.comparison-table td:last-child {
  border-right: 0;
}

.comparison-table tbody tr:last-child td {
  border-bottom: 0;
}

.comparison-table th {
  background: var(--black);
  color: var(--white);
  font-weight: 700;
}

.comparison-table td:not(:first-child),
.comparison-table th:not(:first-child) {
  text-align: right;
}

.comparison-table td[data-best="true"] {
  background: var(--hover);
  color: var(--white);
  font-weight: 700;
}

.comparison-summary {
  display: grid;
  gap: 8px;
  margin-top: 14px;
  border: 1px solid var(--border);
  background: var(--black);
  padding: 12px;
}

.comparison-summary__line {
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
}

.comparison-summary__note {
  color: var(--text-muted);
  font-size: 12px;
}

.analytics-panel {
  overflow-x: auto;
}

.analytics-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.analytics-graph {
  min-width: 320px;
  border: 1px solid var(--border);
  background: var(--black);
  padding: 12px;
}

.analytics-graph__title {
  margin-bottom: 10px;
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.analytics-graph__svg {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border-subtle);
  background: var(--black);
}

.analytics-graph__axis {
  stroke: var(--border-strong);
  stroke-width: 1;
}

.analytics-graph__line {
  fill: none;
  stroke: var(--white);
  stroke-width: 2;
  stroke-linecap: square;
  stroke-linejoin: miter;
}

.analytics-graph__label {
  fill: var(--text-muted);
  font: 11px var(--font-mono);
}

.analytics-status {
  margin-top: 12px;
  border: 1px solid var(--border);
  background: var(--black);
  padding: 10px 12px;
  color: var(--text-muted);
  font-size: 12px;
}

.ready-queue {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ready-queue__item {
  border: 1px solid var(--border-strong);
  background: var(--black);
  color: var(--text-strong);
  padding: 8px 10px;
  font-size: 12px;
  font-weight: 700;
}

.ready-queue__item[data-active="true"] {
  border-color: var(--white);
  background: var(--hover);
  color: var(--white);
}

.scheduler-control-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: 14px;
}

.scheduler-control-panel--wide {
  grid-column: 1 / -1;
}

.scheduler-algorithm-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.scheduler-control-row,
.scheduler-speed-row {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 12px;
}

.scheduler-control-row {
  margin-bottom: 18px;
}

.scheduler-speed-row {
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
}

.scheduler-control-row .button {
  flex: 1 1 170px;
  min-width: 150px;
}

.scheduler-speed-row .button {
  flex: 0 1 76px;
  min-width: 64px;
}

.scheduler-algorithm-button {
  flex: 1 1 160px;
  min-width: 140px;
}

.scheduler-algorithm-button[data-selected="true"] {
  border-color: var(--white);
  background: var(--hover);
  color: var(--white);
}

.scheduler-config-panel {
  display: grid;
  gap: 12px;
  min-height: 96px;
}

.scheduler-config-placeholder,
.scheduler-control-message {
  color: var(--text-muted);
  font-size: 12px;
}

.scheduler-control-message {
  margin-top: 14px;
  min-height: 20px;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.35;
}

.footer {
  display: grid;
  place-items: center;
  margin-top: 34px;
  border-top: 1px solid var(--border);
  padding: 18px 24px;
  color: var(--text-muted);
  font-size: 12px;
}

.developer-footer {
  padding: 28px 24px;
}

.developer-footer__panel {
  display: grid;
  width: min(720px, 100%);
  gap: 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 18px;
  text-align: center;
}

.developer-footer__label {
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
}

.developer-footer__credit {
  color: var(--text-strong);
  font-size: 13px;
}

.developer-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.developer-footer__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  border: 1px solid var(--border);
  background: var(--black);
  padding: 8px 10px;
  color: var(--text-muted);
  transition: border-color 160ms ease-out, background 160ms ease-out, color 160ms ease-out;
}

.developer-footer__link:hover,
.developer-footer__link:focus-visible {
  border-color: var(--border-strong);
  background: var(--hover);
  color: var(--white);
}

.developer-footer__link:focus-visible {
  outline: 1px solid var(--white);
  outline-offset: 2px;
}

.developer-footer__link svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
  flex: 0 0 auto;
}

.developer-footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  justify-content: center;
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .topbar,
  .footer:not(.developer-footer) {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .algorithm-grid,
  .process-form,
  .metrics-grid,
  .analytics-grid,
  .scheduler-control-grid,
  .workspace-grid {
    grid-template-columns: 1fr;
  }

  .placeholder-panel--wide {
    grid-column: auto;
  }

  .scheduler-control-panel--wide {
    grid-column: auto;
  }
}

@media (max-width: 560px) {
  .section {
    width: min(100% - 20px, 1180px);
    padding: 26px 0;
  }

  .topbar {
    padding: 12px 10px;
  }

  .topbar__nav {
    justify-content: flex-start;
  }

  h1 {
    font-size: 34px;
  }

  .button,
  .hero__actions,
  .button-row {
    width: 100%;
  }

  .scheduler-control-row .button,
  .scheduler-speed-row .button,
  .scheduler-algorithm-button {
    flex-basis: 100%;
    width: 100%;
  }

  .button {
    justify-content: center;
  }

  .developer-footer {
    padding: 22px 10px;
  }

  .developer-footer__panel {
    padding: 14px;
  }

  .developer-footer__link {
    justify-content: center;
    width: 100%;
  }

  .developer-footer__meta {
    flex-direction: column;
  }
}