:root {
  --bg: #f3f5f7;
  --surface: #ffffff;
  --ink: #1a222c;
  --muted: #5c6b7a;
  --line: #d5dde5;
  --accent: #0b6e4f;
  --accent-ink: #ffffff;
  --warn: #9a5b00;
  --danger: #a11a2e;
  --gate: #0a4d8c;
  --ok: #1b7a3d;
  --font: "Segoe UI", "IBM Plex Sans", system-ui, sans-serif;
  --mono: "Cascadia Code", "Consolas", ui-monospace, monospace;
  --radius: 6px;
  --shadow: 0 1px 2px rgba(26, 34, 44, 0.06);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.45;
}

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

a:hover {
  text-decoration: underline;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
}

.brand-link {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.brand-sub {
  color: var(--muted);
  font-size: 0.85rem;
}

.top-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.auth-user {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.auth-user .auth-name {
  color: var(--ink);
  font-weight: 600;
}

.auth-user a {
  color: var(--gate);
  font-size: 0.8rem;
}

.health {
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg);
}

.health.ok {
  border-color: #9dceb0;
  color: var(--ok);
  background: #eef8f1;
}

.health.bad {
  border-color: #e3a8b1;
  color: var(--danger);
  background: #fdf1f3;
}

.main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.25rem;
}

.foot {
  max-width: 1100px;
  margin: 0 auto 1.5rem;
  padding: 0 1.25rem;
  color: var(--muted);
  font-size: 0.8rem;
}

h1 {
  margin: 0 0 0.35rem;
  font-size: 1.45rem;
  letter-spacing: -0.02em;
}

h2 {
  margin: 1.4rem 0 0.6rem;
  font-size: 1.05rem;
}

.lede {
  margin: 0 0 1rem;
  color: var(--muted);
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem 1.1rem;
  margin-bottom: 1rem;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}

.row.spread {
  justify-content: space-between;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 0.55rem 0.4rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.75rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: #e8eef4;
  color: var(--ink);
}

.badge.gate {
  background: #e5f0fb;
  color: var(--gate);
}

.badge.done {
  background: #e8f6ec;
  color: var(--ok);
}

.badge.ok {
  background: #dcefe0;
  color: #1b5e20;
}

.badge.bad {
  background: #fde0dc;
  color: #8b1a1a;
}

.evidence-list {
  margin: 0.5rem 0 0;
  padding-left: 1.1rem;
}

.evidence-list li {
  margin: 0.45rem 0;
}

.badge.blocked {
  background: #fdecee;
  color: var(--danger);
}

.badge.warn {
  background: #fff3df;
  color: var(--warn);
}

.hint {
  font-size: 0.8rem;
  color: var(--muted);
}

button,
.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  border-radius: var(--radius);
  padding: 0.45rem 0.75rem;
  font: inherit;
  cursor: pointer;
}

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

button.danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

button.gate {
  background: var(--gate);
  border-color: var(--gate);
  color: #fff;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button:hover:not(:disabled) {
  filter: brightness(0.97);
}

label {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 0.2rem;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.45rem 0.55rem;
  font: inherit;
  background: #fff;
  color: var(--ink);
}

textarea {
  min-height: 5rem;
  resize: vertical;
}

.form-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.form-grid .full {
  grid-column: 1 / -1;
}

.fsm {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.75rem 0 0;
}

.fsm span {
  font-family: var(--mono);
  font-size: 0.68rem;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: var(--bg);
}

.fsm span.past {
  color: var(--ink);
  border-color: #b7c4d0;
}

.fsm span.current {
  background: #e5f0fb;
  border-color: var(--gate);
  color: var(--gate);
  font-weight: 700;
}

.meta {
  display: grid;
  gap: 0.35rem 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  margin-top: 0.75rem;
  font-size: 0.9rem;
}

.meta dt {
  margin: 0;
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.meta dd {
  margin: 0.1rem 0 0;
  font-family: var(--mono);
  font-size: 0.82rem;
  word-break: break-all;
}

.flash {
  padding: 0.65rem 0.8rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  border: 1px solid var(--line);
  background: #fff8e8;
  color: var(--warn);
  white-space: pre-wrap;
}

.flash.error {
  background: #fdf1f3;
  border-color: #e3a8b1;
  color: var(--danger);
}

.flash.info {
  background: #eef8f1;
  border-color: #9dceb0;
  color: var(--ok);
}

.busy {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.progress-banner {
  margin: 0.75rem 0 0;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f5f7fa;
}

.progress-banner.live {
  border-color: #9db5d4;
  background: #eef4fb;
}

.progress-banner .progress-label {
  margin: 0 0 0.25rem;
  font-size: 0.95rem;
}

.progress-banner .hint {
  margin: 0.15rem 0 0;
}

tr.task-active {
  background: #fff8e6;
}

tr.task-active td {
  font-weight: 500;
}

.meta-compact {
  margin-bottom: 0.35rem;
}

.meta-more {
  margin: 0.35rem 0 0.75rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.meta-more summary {
  cursor: pointer;
  user-select: none;
}

.meta-more .meta {
  margin-top: 0.5rem;
}

.pager {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

.pager-btn {
  font: inherit;
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fff;
  cursor: pointer;
}

.pager-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.pager-meta {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0;
}

.human-actions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

@media (max-width: 800px) {
  .human-actions-grid {
    grid-template-columns: 1fr;
  }
}

.human-actions-grid h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.panel-muted summary {
  cursor: pointer;
  user-select: none;
}

.entity {
  border-top: 1px solid var(--line);
  padding: 0.65rem 0;
}

.entity:first-child {
  border-top: 0;
  padding-top: 0;
}

.entity h3 {
  margin: 0 0 0.25rem;
  font-size: 0.95rem;
}

.entity ul {
  margin: 0.35rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.empty {
  color: var(--muted);
  font-style: italic;
}

.commands {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.back {
  display: inline-block;
  margin-bottom: 0.75rem;
  font-size: 0.9rem;
}

/* Specification documents & UX/GUI artefact viewers */
.panel-artefacts {
  border-color: #b8c9e0;
  background: linear-gradient(180deg, #f7fafc 0%, var(--panel) 2.5rem);
}

.doc-section {
  margin-top: 1rem;
}

.doc-section-title {
  margin: 1rem 0 0.5rem;
  font-size: 0.95rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.doc-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  margin: 0.65rem 0;
  background: #fff;
}

.doc-card-highlight {
  border-color: #9eb6d4;
  box-shadow: inset 3px 0 0 #3d6ea8;
}

.doc-card-draft {
  border-color: #0b6e4f;
  box-shadow: inset 3px 0 0 var(--accent);
}

.doc-card-muted {
  opacity: 0.72;
  background: #f7f8fa;
}

.badge.draft {
  background: #e6f4ef;
  color: var(--accent);
  border: 1px solid #9bc9b6;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.gate-banner {
  border: 2px solid var(--gate);
  background: linear-gradient(180deg, #eef5fb 0%, var(--surface) 3rem);
}

.gate-banner .lede {
  margin: 0.35rem 0 0.5rem;
}

.panel-muted {
  border-style: dashed;
  background: #f7f8fa;
}

.panel-muted summary {
  cursor: pointer;
  font-size: 0.95rem;
  padding: 0.25rem 0;
}

.app-docs-list {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
}

.app-docs-list li {
  margin: 0.35rem 0;
}

.doc-card h3 {
  margin: 0;
  font-size: 1rem;
}

.doc-body {
  margin: 0.65rem 0;
  white-space: pre-wrap;
  font-size: 0.92rem;
  line-height: 1.45;
  color: var(--text);
}

.doc-body-full {
  font-size: 0.95rem;
  padding: 0.75rem;
  background: #f8fafc;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.doc-meta {
  margin-top: 0.45rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.ac-list {
  margin: 0.35rem 0 0;
  padding-left: 1.15rem;
  font-size: 0.88rem;
}

.ac-list code {
  margin-right: 0.25rem;
}

.dep-link {
  margin-right: 0.35rem;
}

.badge.kind {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge.kind-ux {
  background: #e8f0fa;
  color: #245a96;
  border-color: #a8c4e0;
}

.badge.kind-gui {
  background: #eef6ec;
  color: #2d6a3a;
  border-color: #a8d0b0;
}

.badge.kind-req {
  background: #f5f0ea;
  color: #6a4a28;
  border-color: #d4c0a8;
}

.doc-pre {
  margin: 0.5rem 0 0;
  padding: 0.75rem;
  background: #f4f6f8;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 0.82rem;
  overflow-x: auto;
  white-space: pre-wrap;
}

/* Clickable GUI prototype preview */
.proto-gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 0.75rem 0;
}

.proto-thumb {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  width: 9.5rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  cursor: pointer;
  overflow: hidden;
  text-align: left;
}

.proto-thumb.active {
  border-color: #3d6ea8;
  box-shadow: 0 0 0 2px rgba(61, 110, 168, 0.25);
}

.proto-thumb img {
  display: block;
  width: 100%;
  height: 5.5rem;
  object-fit: cover;
  object-position: top;
  background: #e8eef4;
}

.proto-thumb-label {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 5.5rem;
  font-size: 0.8rem;
  color: var(--muted);
  background: #eef2f6;
}

.proto-thumb-caption {
  padding: 0.35rem 0.45rem;
  font-size: 0.75rem;
  color: var(--text);
  border-top: 1px solid var(--line);
}

.proto-preview {
  margin-top: 0.5rem;
}

.proto-frame {
  display: block;
  width: 100%;
  height: min(70vh, 560px);
  margin-top: 0.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

@media (max-width: 640px) {
  .main {
    padding: 0.85rem;
  }

  .top {
    padding: 0.7rem 0.85rem;
  }
}