:root {
  --bg: #eef2f7;
  --surface: #ffffff;
  --surface-2: #f8fbff;
  --text: #122333;
  --muted: #5d7387;
  --line: #d6e3ef;
  --primary: #0b7a6f;
  --secondary: #285879;
  --shadow: 0 12px 30px rgba(18, 35, 51, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--text);
  font-family: "Segoe UI", "Aptos", "Trebuchet MS", sans-serif;
  background:
    radial-gradient(circle at 15% 0%, #d9f5ec 0%, rgba(217, 245, 236, 0) 35%),
    radial-gradient(circle at 85% 5%, #dcecff 0%, rgba(220, 236, 255, 0) 30%),
    var(--bg);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 270px 1fr;
}

.sidenav {
  background: linear-gradient(180deg, #0f283c 0%, #123550 100%);
  color: #e9f0f7;
  padding: 20px 14px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: auto;
}

.brand h1 { margin: 0; font-size: 1.4rem; }
.brand p { margin: 5px 0 0; color: #a9c3d7; font-size: 0.85rem; }
.menu-section { margin-top: 20px; }
.menu-section h3 {
  margin: 0 0 9px;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #89a8bf;
}

.nav-link {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: #e9f0f7;
  padding: 10px 11px;
  margin-bottom: 7px;
  cursor: pointer;
}
.nav-link:hover { background: rgba(255, 255, 255, 0.08); }
.nav-link.active { background: rgba(11, 122, 111, 0.28); border-color: rgba(159, 231, 218, 0.45); }

.main-wrap { padding: 18px; }

.topbar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.menu-toggle { display: none; }
.title-block h2 { margin: 0; font-size: 1.35rem; }
.subtitle { margin: 4px 0 0; color: var(--muted); }
.topbar-actions { display: flex; align-items: center; gap: 8px; }

.content {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 18px;
  min-height: calc(100vh - 90px);
}

.page { display: none; }
.page.active { display: block; }

.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-2);
  padding: 14px;
}

.hero { background: linear-gradient(135deg, #f2fff9 0%, #f2f8ff 100%); border-color: #cce6d8; }
.hero h2 { margin-top: 0; }
.hero-actions { margin-top: 12px; display: flex; gap: 8px; }

.grid-2, .grid-3, .metrics { display: grid; gap: 10px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 10px; }
.metrics { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.metric { border: 1px solid var(--line); border-radius: 12px; padding: 10px; background: #fff; }
.metric h4 { margin: 0; color: var(--muted); font-size: 0.83rem; }
.metric p { margin: 5px 0 0; font-size: 1.08rem; font-weight: 700; }

label { display: block; color: var(--muted); margin: 9px 0 5px; }
input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 11px;
  background: #fff;
}
textarea { min-height: 86px; }

button {
  border: 0;
  border-radius: 10px;
  padding: 10px 12px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}
button.secondary { background: var(--secondary); }
button.ghost { background: #eaf1f7; color: #173246; }

.actions-row { display: flex; gap: 8px; margin: 10px 0; flex-wrap: wrap; }
.option { display: block; border: 1px solid var(--line); border-radius: 10px; padding: 10px; background: #fff; margin-bottom: 8px; }
.feedback { margin-top: 10px; padding: 10px; background: #f1fffb; border: 1px solid #c7ede2; border-radius: 10px; }
.list { padding-left: 18px; }
.list li { margin-bottom: 7px; }
.stack { display: grid; gap: 10px; }

table { width: 100%; border-collapse: collapse; }
th, td { border-bottom: 1px solid var(--line); text-align: left; padding: 8px; }

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid #b9e7dd;
  background: #dbf7f0;
  color: #0a665c;
  font-size: 0.8rem;
  margin-right: 6px;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(10, 25, 35, 0.48);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 40;
  padding: 14px;
}

.modal-card {
  width: min(560px, 96vw);
  background: #fff;
  border-radius: 14px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 16px;
}

.small { color: var(--muted); font-size: 0.86rem; }
.mt { margin-top: 10px; }
.hidden { display: none !important; }

@media (max-width: 1100px) {
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .app-shell { grid-template-columns: 1fr; }

  .sidenav {
    position: fixed;
    left: 0;
    top: 0;
    width: 260px;
    transform: translateX(-102%);
    transition: transform 180ms ease;
    z-index: 20;
  }

  .sidenav.open { transform: translateX(0); }
  .menu-toggle { display: inline-block; }

  .topbar { grid-template-columns: auto 1fr; }
  .topbar-actions { grid-column: 1 / span 2; flex-wrap: wrap; }

  .grid-2, .grid-3, .metrics { grid-template-columns: 1fr; }
}