:root {
  --bg: #f0efed;
  --card: #ffffff;
  --text: #1a1a1a;
  --muted: #666666;
  --brand: #68bc45;
  --brand-hover: #5aaa3c;
  --border: #e5e7eb;
  --radius: 6px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

a {
  color: inherit;
}

.app-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card {
  width: min(720px, 100%);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
  padding: 24px;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.brand-row img {
  height: 40px;
  width: auto;
}

.title {
  margin: 0;
  font-size: 23px;
  font-weight: 700;
}

.subtitle {
  margin: 8px 0 20px;
  color: var(--muted);
  font-size: 14px;
}

.stack {
  display: grid;
  gap: 12px;
}

.input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 11px 12px;
  font-size: 14px;
}

.btn {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 7px 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-transform: uppercase;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
}

.btn-primary:hover {
  background: var(--brand-hover);
}

.btn-ghost {
  background: #fff;
  border: 1px solid var(--border);
  color: var(--muted);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: #c6c6c6;
}

.error {
  color: #b91c1c;
  min-height: 20px;
  margin: 0;
  font-size: 13px;
}

.topbar {
  width: 100%;
  background: #fff;
  border-bottom: 1px solid #dedede;
}

.topbar-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.topbar-brand {
  margin: 0;
  gap: 10px;
}

.topbar-brand img {
  height: 26px;
}

.topbar-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.topbar-brand-text strong {
  font-size: 14px;
}

.topbar-brand-text small {
  color: var(--muted);
  font-size: 11px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.session-pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  background: #fafafa;
}

.tools-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px 14px;
}

.tools-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.tool-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.tool-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.tool-card h3 {
  margin: 0;
  font-size: 16px;
}

.tool-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.tool-chip {
  border: 1px solid #cde6be;
  color: #3f7d25;
  background: #f4fbef;
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 700;
}

.tool-card-actions {
  margin-top: 4px;
}

@media (max-width: 640px) {
  .app-shell { padding: 16px; }
  .card { padding: 18px; }

  .brand-row img { height: 32px; }
  .title { font-size: 20px; }

  .input { padding: 12px; font-size: 16px; }
  .btn { padding: 10px 14px; font-size: 12px; }

  .topbar-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 8px 12px;
  }

  .topbar-actions {
    width: 100%;
    justify-content: space-between;
  }

  .tools-grid {
    grid-template-columns: 1fr;
  }

  .tool-card { padding: 14px; }
  .tool-card h3 { font-size: 15px; }
  .tool-card .btn { width: 100%; }
}