:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --panel: #ffffff;
  --panel-soft: #f8fafc;
  --line: #d7dee8;
  --text: #162033;
  --muted: #64748b;
  --accent: #0f766e;
  --accent-strong: #0b5f59;
  --accent-soft: rgba(15, 118, 110, 0.12);
  --warning: #92400e;
  --shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

.shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  border-right: 1px solid var(--line);
  background: #fff;
  padding: 22px 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
}

.brand h1 {
  margin: 0;
  font-size: 20px;
}

.brand p,
.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.search-label {
  display: block;
  margin-bottom: 8px;
  color: #334155;
  font-weight: 700;
}

.search {
  width: 100%;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 0 11px;
  color: var(--text);
  outline: none;
}

.search:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.filters {
  display: grid;
  gap: 8px;
  margin-top: 20px;
}

.filter {
  width: 100%;
  border: 1px solid transparent;
  border-radius: 7px;
  padding: 9px 10px;
  background: transparent;
  color: #334155;
  cursor: pointer;
  text-align: left;
  font-weight: 700;
}

.filter.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.content {
  padding: 28px;
}

.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.topbar h2 {
  margin: 4px 0 0;
  font-size: 28px;
}

.meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.meta span,
.status {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--muted);
  padding: 4px 9px;
  font-size: 12px;
  font-weight: 700;
}

.notice {
  display: flex;
  gap: 10px;
  align-items: center;
  border: 1px solid #fed7aa;
  border-radius: 8px;
  background: #fff7ed;
  color: var(--warning);
  padding: 11px 12px;
  margin-bottom: 18px;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}

.tool-card {
  display: grid;
  gap: 12px;
  min-height: 190px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 16px;
  box-shadow: var(--shadow);
}

.tool-card h3 {
  margin: 0;
  font-size: 17px;
}

.tool-card p {
  margin: 0;
  color: var(--muted);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  border-radius: 999px;
  background: var(--panel-soft);
  color: #475569;
  padding: 3px 8px;
  font-size: 12px;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
}

.open-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 92px;
  height: 36px;
  border-radius: 7px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
}

.open-link:hover {
  background: var(--accent-strong);
}

.empty {
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 28px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 820px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .content {
    padding: 18px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .notice {
    align-items: flex-start;
    flex-direction: column;
  }
}