:root {
  --bg: #0f141b;
  --bg-soft: #131a23;
  --panel: #1b2431;
  --panel-2: #212d3c;
  --text: #e2ebf5;
  --text-muted: #a8b6c7;
  --line: #314055;
  --accent: #5f8ec7;
  --accent-soft: #83addf;
  --radius: 10px;
  --t-fast: 140ms ease;
  --body-bg-top: #111722;
  --app-bg-top: #171f2a;
  --app-bg-bottom: #121923;
  --topbar-bg: #141b25;
  --chip-bg: #1b2330;
  --menu-bg: #17202b;
  --menu-hover-border: #506886;
  --card-hover-border: #4f6077;
  --tool-link-bg: #172131;
  --tool-link-hover-text: #d6e7fb;
  --title-text: #e8f0fa;
  --footer-bg: #141b25;
}

body[data-theme="light"] {
  --bg: #f0eee5;
  --bg-soft: #f4f1e8;
  --panel: #fbf8f0;
  --panel-2: #f1eee4;
  --text: #334038;
  --text-muted: #6d7a72;
  --line: #c9d0c3;
  --accent: #7c9e8c;
  --accent-soft: #668876;
  --body-bg-top: #f3f0e8;
  --app-bg-top: #faf7ef;
  --app-bg-bottom: #ece9de;
  --topbar-bg: #f6f2e8;
  --chip-bg: #edf0e5;
  --menu-bg: #f3efe5;
  --menu-hover-border: #9fb7aa;
  --card-hover-border: #a8bbae;
  --tool-link-bg: #edf1e6;
  --tool-link-hover-text: #304139;
  --title-text: #3b4b42;
  --footer-bg: #f6f2e8;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  background: linear-gradient(180deg, var(--body-bg-top) 0%, var(--bg) 100%);
  color: var(--text);
  font-family: "IBM Plex Sans", sans-serif;
  padding: 8px;
}

.c-shell {
  width: calc(100vw - 16px);
  min-height: calc(100vh - 16px);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: linear-gradient(180deg, var(--app-bg-top) 0%, var(--app-bg-bottom) 100%);
  box-shadow: 0 12px 26px rgba(0, 0, 0, 0.35);
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.c-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--topbar-bg);
  flex-wrap: wrap;
}

.c-title h1 {
  font-size: 0.98rem;
  letter-spacing: 0.16em;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--title-text);
}

.c-title p {
  color: var(--text-muted);
  font-size: 0.78rem;
  margin-top: 3px;
}

.c-status {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.c-chip {
  border: 1px solid var(--line);
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--chip-bg);
  color: var(--text-muted);
  font-size: 0.76rem;
  font-family: "IBM Plex Mono", monospace;
}

.c-chip-btn {
  cursor: pointer;
  transition: border-color var(--t-fast), color var(--t-fast), transform var(--t-fast);
}

.c-chip-btn:hover {
  border-color: var(--accent);
  color: var(--text);
  transform: translateY(-1px);
}

.c-layout {
  display: grid;
  grid-template-columns: 248px 1fr;
  min-height: 0;
}

.c-sidebar {
  border-right: 1px solid var(--line);
  background: var(--bg-soft);
  padding: 12px;
  display: grid;
  gap: 8px;
  align-content: start;
}

.c-nav-link {
  text-decoration: none;
  border: 1px solid var(--line);
  background: var(--menu-bg);
  color: var(--text-muted);
  border-radius: 8px;
  padding: 10px;
  font-size: 0.88rem;
  transition: border-color var(--t-fast), box-shadow var(--t-fast), color var(--t-fast), transform var(--t-fast);
}

.c-nav-link:hover,
.c-nav-link.is-active {
  color: var(--text);
  border-color: var(--menu-hover-border);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.22);
  transform: translateY(-1px);
}

.c-main {
  padding: 14px;
  overflow: auto;
  display: grid;
  gap: 12px;
  align-content: start;
}

.c-grid {
  display: grid;
  gap: 12px;
}

.c-grid.cols-1 { grid-template-columns: 1fr; }
.c-grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.c-grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.c-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  transition: border-color var(--t-fast), box-shadow var(--t-fast), transform var(--t-fast);
}

.c-card:hover {
  border-color: var(--card-hover-border);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
  transform: translateY(-1px);
}

.c-card h2 {
  font-size: 1.03rem;
  margin-bottom: 10px;
  color: var(--title-text);
}

.c-muted {
  color: var(--text-muted);
  font-size: 0.86rem;
  line-height: 1.62;
}

.c-list {
  display: grid;
  gap: 8px;
}

.c-list li {
  list-style: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: var(--panel-2);
  font-size: 0.85rem;
}

.c-tools {
  display: grid;
  gap: 10px;
}

.c-tool {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
}

.c-tool p {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-top: 2px;
}

.c-tool a {
  color: var(--accent-soft);
  text-decoration: none;
  border: 1px solid var(--line);
  background: var(--tool-link-bg);
  font-size: 0.84rem;
  padding: 7px 10px;
  border-radius: 7px;
  white-space: nowrap;
}

.c-tool a:hover {
  border-color: var(--accent);
  color: var(--tool-link-hover-text);
}

.c-footer {
  border-top: 1px solid var(--line);
  padding: 10px 14px;
  color: var(--text-muted);
  font-size: 0.75rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  background: var(--footer-bg);
}

@media (max-width: 980px) {
  body { padding: 4px; }
  .c-shell { width: calc(100vw - 8px); min-height: calc(100vh - 8px); }
  .c-layout { grid-template-columns: 1fr; }
  .c-sidebar { border-right: none; border-bottom: 1px solid var(--line); }
  .c-grid.cols-2,
  .c-grid.cols-3 { grid-template-columns: 1fr; }
}