:root {
  --bg: #eef2f7;
  --sidebar: #243447;
  --sidebar-strong: #1b2838;
  --panel: #ffffff;
  --panel-muted: #f6f9fc;
  --text: #223041;
  --muted: #66778c;
  --line: #d9e2ec;
  --primary: #3c8dbc;
  --primary-strong: #2c6b96;
  --success: #27ae60;
  --warning: #f39c12;
  --danger: #dd4b39;
  --shadow: 0 20px 50px rgba(29, 47, 68, 0.12);
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: linear-gradient(180deg, #eff3f8 0%, #dfe8f1 100%); color: var(--text); }
a { color: inherit; text-decoration: none; }
p, li, label, input, textarea, select, button { font: inherit; }
button { cursor: pointer; }

.shell-frame { display: grid; grid-template-columns: 300px 1fr; min-height: 100vh; }
.sidebar {
  background: linear-gradient(180deg, var(--sidebar) 0%, var(--sidebar-strong) 100%);
  color: #e7eef6;
  padding: 28px 22px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}
.brand-block { display: block; padding: 6px 6px 26px; border-bottom: 1px solid rgba(255,255,255,0.12); margin-bottom: 20px; }
.brand-eyebrow, .card-eyebrow, .topbar-eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.74rem;
  color: var(--warning);
}
.brand-title { display: block; font-size: 1.7rem; margin: 8px 0 6px; }
.brand-note { color: rgba(231,238,246,0.72); font-size: 0.94rem; }
.nav-group { margin-bottom: 24px; }
.nav-group h2 { margin: 0 0 6px; font-size: 0.96rem; color: #fff; }
.nav-group p { margin: 0 0 12px; color: rgba(231,238,246,0.68); font-size: 0.9rem; }
.nav-group ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.nav-group a {
  display: block;
  padding: 10px 12px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
}
.nav-group a:hover { background: rgba(60,141,188,0.24); }

.shell-main { padding: 28px; }
.topbar {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 24px;
}
.topbar h1 { margin: 6px 0 8px; font-size: 2.2rem; }
.topbar p { margin: 0; color: var(--muted); max-width: 720px; }
.topbar-pills { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; }
.topbar-pills span {
  padding: 10px 14px;
  background: rgba(60,141,188,0.12);
  color: var(--primary-strong);
  border-radius: 999px;
  font-weight: 600;
}

.content { display: grid; gap: 22px; }
.shell-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid rgba(36, 52, 71, 0.12);
  color: var(--muted);
  font-size: 0.92rem;
}
.hero-grid, .panel-grid, .metric-grid, .focus-grid, .feature-category-grid { display: grid; gap: 18px; }
.hero-grid { grid-template-columns: 1.6fr 1fr; }
.metric-grid { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.panel-grid--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.panel-grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.focus-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.feature-category-grid { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

.hero-card, .panel, .metric-card, .focus-card {
  background: var(--panel);
  border: 1px solid rgba(36,52,71,0.08);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.hero-card { padding: 26px; }
.hero-card h2 { margin: 8px 0 12px; font-size: 2rem; }
.hero-card p { margin: 0; color: rgba(255,255,255,0.84); }
.hero-card--primary {
  color: #fff;
  background: linear-gradient(135deg, #3c8dbc 0%, #1f5879 100%);
}
.hero-card--dark {
  color: #eef6fd;
  background: linear-gradient(135deg, #283848 0%, #1b252f 100%);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px; }
.panel, .focus-card, .metric-card { padding: 22px; }
.panel-heading { display: flex; justify-content: space-between; gap: 12px; align-items: flex-start; margin-bottom: 16px; }
.panel h2, .focus-card h2 { margin: 6px 0 10px; font-size: 1.2rem; }
.panel p, .focus-card p, .metric-card p { margin: 0; color: var(--muted); }
.metric-card strong { display: block; font-size: 2rem; margin: 10px 0 8px; color: var(--primary-strong); }
.metric-card span { color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.72rem; }
.focus-card { background: linear-gradient(180deg, #ffffff 0%, #f5f9fd 100%); }

.stack { display: grid; gap: 12px; }
.split-stack { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.compact-form label { font-size: 0.95rem; }
label { display: grid; gap: 6px; color: var(--muted); }
input, textarea, select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-muted);
  color: var(--text);
}
textarea { resize: vertical; }
.button {
  border: 0;
  border-radius: 10px;
  padding: 12px 16px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
}
.button--ghost {
  background: transparent;
  color: var(--primary-strong);
  border: 1px solid rgba(60,141,188,0.25);
}
.button--light {
  background: #fff;
  color: var(--primary-strong);
}
.status-dot {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(39,174,96,0.14);
  color: var(--success);
  font-weight: 700;
}
.message-box, .output-box {
  margin-top: 14px;
  padding: 14px;
  background: #111827;
  color: #f3f4f6;
  border-radius: 12px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 58px;
}
.output-box--small { min-height: 180px; }
.data-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
.data-point {
  padding: 14px;
  border-radius: 12px;
  background: linear-gradient(180deg, #f7fbff 0%, #edf4fb 100%);
  border: 1px solid #d8e7f3;
}
.data-point span { display: block; font-size: 0.76rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.data-point strong { display: block; font-size: 1.3rem; margin-top: 6px; }
.bullet-list, .ordered-list { margin: 0; padding-left: 20px; display: grid; gap: 10px; color: var(--text); }
.bullet-list--tight { gap: 6px; }
.chip-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.chip-cloud span {
  padding: 10px 12px;
  border-radius: 999px;
  background: rgba(60,141,188,0.12);
  color: var(--primary-strong);
  font-weight: 600;
}

@media (max-width: 1080px) {
  .shell-frame { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; }
  .hero-grid, .panel-grid--two, .panel-grid--three, .split-stack { grid-template-columns: 1fr; }
  .topbar { flex-direction: column; }
  .shell-footer { flex-direction: column; }
}