:root {
  --ink: #1f2933;
  --muted: #66788a;
  --line: #d9e2ec;
  --paper: #ffffff;
  --canvas: #f4f7fb;
  --nav: #102027;
  --nav-2: #17343d;
  --blue: #2563eb;
  --green: #14866d;
  --amber: #c47a13;
  --red: #bf3b45;
  --violet: #7353ba;
  --teal: #0f8a9d;
  --shadow: 0 8px 24px rgba(20, 35, 50, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
select {
  font: inherit;
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 280px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 24px 18px;
  background: linear-gradient(180deg, var(--nav), var(--nav-2));
  color: #eaf2f8;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 52px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: #f3c969;
  color: #17252d;
  font-weight: 850;
}

.brand h1,
.brand p {
  margin: 0;
}

.brand h1 {
  font-size: 1.08rem;
  letter-spacing: 0;
}

.brand p {
  color: #a8c0cd;
  font-size: 0.82rem;
  margin-top: 3px;
}

.nav {
  display: grid;
  gap: 6px;
}

.nav-item {
  width: 100%;
  min-height: 38px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: #c9dce8;
  cursor: pointer;
  text-align: left;
  padding: 8px 10px;
}

.nav-item:hover,
.nav-item:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  outline: none;
}

.nav-item.active {
  background: #eef6fb;
  color: #102027;
  border-color: #cde1ee;
  font-weight: 750;
}

.source {
  margin-top: auto;
  display: grid;
  gap: 5px;
  color: #a8c0cd;
  font-size: 0.78rem;
  line-height: 1.35;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding-top: 16px;
}

.source strong {
  color: #eff6fb;
}

.app {
  min-height: 100vh;
  margin-left: 280px;
  padding: 24px;
}

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

.eyebrow {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
}

.topbar h2 {
  margin: 0;
  font-size: clamp(1.45rem, 2.2vw, 2.2rem);
  letter-spacing: 0;
}

.status {
  min-width: 170px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--muted);
  padding: 9px 12px;
  text-align: right;
  box-shadow: var(--shadow);
  font-size: 0.85rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: end;
  margin-bottom: 18px;
}

.field {
  display: grid;
  gap: 5px;
  min-width: 180px;
}

.field label {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.field select {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
  padding: 7px 10px;
}

.content {
  display: grid;
  gap: 18px;
}

.grid {
  display: grid;
  gap: 18px;
}

.grid.cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid.cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.metric {
  min-height: 122px;
  border: 1px solid var(--line);
  border-left: 5px solid var(--blue);
  border-radius: 8px;
  background: var(--paper);
  padding: 18px;
  box-shadow: var(--shadow);
}

.metric:nth-child(2) {
  border-left-color: var(--green);
}

.metric:nth-child(3) {
  border-left-color: var(--amber);
}

.metric:nth-child(4) {
  border-left-color: var(--violet);
}

.metric .label {
  min-height: 28px;
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 850;
  text-transform: uppercase;
}

.metric .value {
  margin: 0;
  font-size: clamp(1.45rem, 2.5vw, 2rem);
  font-weight: 850;
}

.metric .delta {
  margin: 6px 0 0;
  font-size: 0.84rem;
  font-weight: 750;
}

.delta.up {
  color: var(--green);
}

.delta.down {
  color: var(--red);
}

.panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.panel-head {
  padding: 15px 16px 0;
}

.panel h3 {
  margin: 0;
  font-size: 1rem;
}

.panel p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.chart {
  width: 100%;
  min-height: 360px;
}

.chart.tall {
  min-height: 480px;
}

.notice {
  border: 1px solid #f0d395;
  border-radius: 8px;
  background: #fff8e7;
  color: #6f4d13;
  padding: 14px 16px;
}

/* ── Hamburger & drawer elements ── */

.topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  font-size: 1.1rem;
}

.sidebar-close {
  display: none;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  margin-left: auto;
  flex-shrink: 0;
  border: none;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.12);
  color: #eaf2f8;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 199;
  cursor: pointer;
}

/* ── Tablet drawer (≤1040px) ── */

@media (max-width: 1040px) {
  .sidebar {
    z-index: 200;
    transform: translateX(-100%);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 32px rgba(0, 0, 0, 0.25);
  }

  .sidebar-close {
    display: flex;
  }

  .sidebar-overlay.open {
    display: block;
  }

  .menu-toggle {
    display: flex;
  }

  .app {
    margin-left: 0;
  }

  .grid.cols-2,
  .grid.cols-3,
  .grid.cols-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ── Mobile (≤680px) ── */

@media (max-width: 680px) {
  .app {
    padding: 14px;
  }

  .topbar {
    flex-wrap: wrap;
    gap: 10px;
  }

  .status {
    width: 100%;
    min-width: 0;
    text-align: left;
  }

  .grid.cols-2,
  .grid.cols-3,
  .grid.cols-4 {
    grid-template-columns: 1fr;
  }

  .field {
    width: 100%;
    min-width: 0;
  }

  .chart {
    min-height: 260px;
  }

  .chart.tall {
    min-height: 340px;
  }
}