:root {
  color-scheme: light;
  --surface: #f8fafc;
  --line: #dbe3ef;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #166534;
  --accent-strong: #14532d;
  --shadow: 0 18px 42px rgba(15, 23, 42, 0.12);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: linear-gradient(135deg, #edf4ff 0%, #f8fafc 35%, #eef8ef 100%);
  color: var(--text);
}
button, input { font: inherit; }
.hidden { display: none !important; }
.shell { min-height: 100vh; display: grid; grid-template-columns: 280px minmax(0, 1fr); }
.sidebar {
  background: rgba(15, 23, 42, 0.95);
  color: #fff;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #22c55e, #166534);
  color: #fff;
  font-weight: 800;
  font-size: 24px;
}
.brand h1, .brand p, .topbar h2, .topbar p, .section-header h3, .section-header p, .login-card h3, .login-card p, .status-card p, .status-card strong { margin: 0; }
.status-card {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.06);
}
.status-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: #22c55e;
  margin-top: 4px;
  box-shadow: 0 0 0 6px rgba(34, 197, 94, 0.18);
}
.nav { display: grid; gap: 10px; }
.nav-button, .ghost-button, .primary-button {
  border: 0;
  border-radius: 14px;
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease;
}
.nav-button {
  background: rgba(255, 255, 255, 0.08);
  color: #dbeafe;
  padding: 14px 16px;
  text-align: left;
}
.nav-button.is-active, .nav-button:hover { background: rgba(34, 197, 94, 0.24); color: #fff; }
.ghost-button { padding: 14px 16px; background: rgba(255, 255, 255, 0.08); color: #fff; }
.ghost-button:hover, .primary-button:hover { transform: translateY(-1px); }
.content { padding: 28px; display: grid; gap: 24px; }
.topbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.topbar-actions { display: flex; align-items: center; gap: 12px; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); font-size: 12px; font-weight: 700; }
.user-badge { background: #fff; border-radius: 999px; padding: 10px 16px; box-shadow: var(--shadow); }
.status-banner {
  padding: 12px 16px;
  border-radius: 16px;
  border: 1px solid #bbd3bb;
  background: #eef8ef;
  color: #1f5a24;
  font-weight: 600;
}
.status-banner.is-error {
  border-color: #edc0c0;
  background: #fff2f2;
  color: #8b1e1e;
}
.login-card, .panel-card {
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(219, 227, 239, 0.9);
  border-radius: 24px;
  box-shadow: var(--shadow);
}
.login-card { padding: 32px; display: grid; gap: 28px; max-width: 560px; }
.login-form { display: grid; gap: 18px; }
.login-form label { display: grid; gap: 8px; }
.login-form input { border-radius: 14px; border: 1px solid var(--line); padding: 14px 16px; background: #fff; }
.primary-button {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #fff;
  padding: 14px 18px;
  font-weight: 700;
}
.error-message { margin: 0; color: #b91c1c; font-weight: 600; }
.muted { color: var(--muted); }
.metrics-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.metric-card, .stack-item, .setting-card, .table-card {
  background: #fff;
  border-radius: 20px;
  border: 1px solid var(--line);
  padding: 20px;
  box-shadow: var(--shadow);
}
.metric-card strong { display: block; font-size: 28px; margin-top: 10px; }
.panel-card { padding: 24px; }
.section-header { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 18px; }
.stack { display: grid; gap: 14px; }
.stack-item strong, .setting-card strong, .table-card strong { display: block; margin-bottom: 6px; }
.kpi-grid, .settings-sections {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 18px;
}
.editor-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #f8fafc;
}
.editor-grid label {
  display: grid;
  gap: 8px;
}
.editor-grid input,
.editor-grid select,
.editor-grid textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
}
.checkbox-row {
  display: flex !important;
  align-items: center;
  gap: 10px;
  align-self: end;
}
.checkbox-row input {
  width: auto;
}
.wide {
  grid-column: 1 / -1;
}
.form-actions {
  display: flex;
  gap: 12px;
}
.table-wrap { overflow: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
thead th { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.table-grid, .settings-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  background: #eefbf1;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 700;
}
@media (max-width: 980px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { gap: 16px; }
  .metrics-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .editor-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .content { padding: 18px; }
  .topbar { flex-direction: column; align-items: flex-start; }
  .topbar-actions { width: 100%; justify-content: space-between; }
  .metrics-grid { grid-template-columns: 1fr; }
  .editor-grid { grid-template-columns: 1fr; }
  .form-actions { flex-direction: column; }
}