:root {
  --bg: #0b1020;
  --card: #131a33;
  --card-2: #1a2347;
  --text: #e6e9f5;
  --muted: #8b93b3;
  --accent: #6c8cff;
  --accent-2: #2dd4bf;
  --danger: #ef4444;
  --ok: #22c55e;
  --border: #232c4e;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(1200px 600px at 20% -10%, #1f2a55 0%, var(--bg) 60%);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter, sans-serif;
  min-height: 100vh;
}

header {
  padding: 32px 24px 8px;
  max-width: 1100px;
  margin: 0 auto;
}
header h1 {
  margin: 0;
  font-size: 28px;
  letter-spacing: -0.02em;
}
.subtitle {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 24px 48px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.form-card h2 {
  margin: 0 0 12px;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.form-card .hint {
  margin: -4px 0 12px;
  color: var(--muted);
  font-size: 13px;
}
.form-card form { display: flex; flex-direction: column; gap: 14px; }
.actions { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}
label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}
input, select {
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s ease;
  font-family: inherit;
}
input:focus, select:focus { border-color: var(--accent); }
select { cursor: pointer; }

button {
  align-self: flex-start;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b1020;
  font-weight: 600;
  border: 0;
  border-radius: 8px;
  padding: 10px 18px;
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.05s ease, opacity 0.15s ease;
}
button:hover { opacity: 0.92; }
button:active { transform: translateY(1px); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.status { font-size: 13px; color: var(--muted); min-height: 18px; }
.status.error { color: var(--danger); }
.status.ok { color: var(--ok); }

.results { display: flex; flex-direction: column; gap: 20px; }
.hidden { display: none; }

.metrics-card h2, .chart-card h2 {
  margin: 0 0 14px;
  font-size: 16px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}
.metric {
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
}
.metric .k { font-size: 12px; color: var(--muted); }
.metric .v { font-size: 20px; font-weight: 600; margin-top: 4px; }
.metric .v.pos { color: var(--ok); }
.metric .v.neg { color: var(--danger); }

.chart-card { height: 460px; }
#chart { width: 100% !important; height: 380px !important; }

footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 24px 32px;
  color: var(--muted);
  font-size: 13px;
}
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ====== Auth UI ====== */
.header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
}
.auth-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px 6px 6px;
  font-size: 13px;
}
.auth-bar img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--card-2);
}
.logout-btn {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 12px;
  cursor: pointer;
}
.logout-btn:hover { color: var(--text); border-color: var(--accent); }

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 36px;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  text-align: center;
}
.login-card h1 {
  margin: 0 0 8px;
  font-size: 22px;
  letter-spacing: -0.02em;
}
.login-card p {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 24px;
}
.google-btn {
  background: #fff;
  color: #1f1f1f;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 500;
  font-size: 14px;
  border: 0;
  cursor: pointer;
  margin: 0 auto;
}
.google-btn:hover { background: #f5f5f5; }
.login-error {
  margin-top: 14px;
  color: var(--danger);
  font-size: 13px;
  min-height: 18px;
}