:root {
  --bg: #f8fafc;
  --white: #ffffff;
  --border: #e5e7eb;
  --border-light: #f3f4f6;
  --text: #111827;
  --text2: #4b5563;
  --text3: #6b7280;
  --text4: #9ca3af;
  --blue: #2563eb;
  --blue-hover: #1d4ed8;
  --blue-light: #eff6ff;
  --green: #22c55e;
  --green-light: #f0fdf4;
  --yellow: #eab308;
  --yellow-light: #fefce8;
  --orange: #f97316;
  --red: #ef4444;
  --red-light: #fef2f2;
  --radius: 0.5rem;
  --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Header */
#header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  height: 56px;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header-left {
  display: flex;
  align-items: center;
  gap: 24px;
}
.header-logo {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}
.header-logo:hover { color: var(--blue); }
.header-nav {
  display: flex;
  gap: 4px;
}

/* Nav links */
.nav-link {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text2);
  text-decoration: none;
  transition: all .15s;
}
.nav-link:hover { color: var(--text); background: var(--border-light); }
.nav-link.active { color: var(--blue); background: var(--blue-light); }
.logout-link { color: var(--text4); font-size: 12px; }

/* Content */
#content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

/* Page header */
.page-header { margin-bottom: 24px; }
.page-header h1 { font-size: 18px; font-weight: 600; color: var(--text); }
.page-header p { font-size: 13px; color: var(--text3); margin-top: 2px; }

/* Cards */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 16px;
}
.card h3 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text3);
  margin-bottom: 12px;
}

/* KPI Cards */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.kpi-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
}
.kpi-card .label { font-size: 11px; font-weight: 500; color: var(--text3); text-transform: uppercase; letter-spacing: .04em; margin-bottom: 4px; }
.kpi-card .value { font-size: 26px; font-weight: 700; color: var(--text); }
.kpi-card .delta { font-size: 12px; margin-top: 4px; color: var(--text4); }
.kpi-card .delta.up { color: var(--green); }
.kpi-card .delta.down { color: var(--red); }

/* Chart grid */
.chart-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }

/* Tables */
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th {
  text-align: left;
  padding: 8px 12px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: .04em;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
th:hover { color: var(--text); }
td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text2);
}
tr:hover td { background: var(--border-light); }
.flag { margin-right: 4px; }

/* Rating bar */
.rating-bar {
  display: inline-block;
  width: 48px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin-left: 6px;
  vertical-align: middle;
  overflow: hidden;
}
.rating-bar-fill { height: 100%; border-radius: 2px; }

/* Controls */
.controls {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.controls input[type="text"],
.controls select {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 12px;
  color: var(--text);
  font-size: 13px;
  outline: none;
  height: 36px;
}
.controls input[type="text"]:focus,
.controls select:focus { border-color: var(--blue); box-shadow: 0 0 0 2px rgba(37,99,235,.15); }
.controls input[type="text"] { width: 200px; }

/* Buttons */
.btn-primary {
  background: var(--blue);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 7px 16px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background .15s;
  height: 36px;
}
.btn-primary:hover { background: var(--blue-hover); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }

.btn-secondary {
  background: var(--white);
  color: var(--text2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 7px 16px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all .15s;
  height: 36px;
}
.btn-secondary:hover { background: var(--border-light); }

/* Back link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text3);
  text-decoration: none;
  font-size: 13px;
  margin-bottom: 16px;
}
.back-link:hover { color: var(--blue); }

/* Release notes */
.release-notes {
  background: var(--bg);
  border-radius: 6px;
  padding: 12px;
  font-size: 13px;
  color: var(--text2);
  white-space: pre-wrap;
  max-height: 200px;
  overflow-y: auto;
  margin-top: 8px;
}

/* Loading */
.loading { text-align: center; padding: 48px; color: var(--text4); font-size: 14px; }

/* Login */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  width: 100%;
  background: var(--bg);
}
.login-card {
  background: var(--white);
  border-radius: 12px;
  padding: 40px;
  width: 380px;
  box-shadow: 0 4px 24px rgba(0,0,0,.08);
  border: 1px solid var(--border);
  text-align: center;
}
.login-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}
.login-subtitle {
  font-size: 13px;
  color: var(--text3);
  margin-bottom: 24px;
}
#login-form input {
  width: 100%;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  color: var(--text);
  font-size: 14px;
  outline: none;
  margin-bottom: 12px;
}
#login-form input:focus { border-color: var(--blue); box-shadow: 0 0 0 2px rgba(37,99,235,.15); }
#login-form .btn-primary { width: 100%; padding: 10px; font-size: 14px; height: auto; }
.login-error { color: var(--red); font-size: 13px; margin-top: 12px; min-height: 18px; }

/* Recommendation cards */
.rec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
}
.rec-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  border-left: 3px solid var(--border);
}
.rec-card.needs-few { border-left-color: var(--green); }
.rec-card.needs-some { border-left-color: var(--orange); }
.rec-card.needs-many { border-left-color: var(--red); }
.rec-card .rec-country { font-size: 13px; font-weight: 600; color: var(--text); }
.rec-card .rec-rating { font-size: 12px; color: var(--text3); margin-top: 2px; }
.rec-card .rec-needed { font-size: 18px; font-weight: 700; color: var(--text); margin-top: 6px; }

/* Stars */
.stars { color: var(--yellow); letter-spacing: 1px; }

/* Responsive */
@media (max-width: 900px) {
  .chart-row { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .header-inner { padding: 0 12px; }
  .header-nav { gap: 2px; }
  .nav-link { padding: 4px 8px; font-size: 12px; }
  #content { padding: 16px 12px; }
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .rec-grid { grid-template-columns: 1fr 1fr; }
}