:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --card: #ffffff;
  --line: #d6dde5;
  --text: #17212b;
  --muted: #5e6b78;
  --accent: #0b7a75;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(180deg, #e9f1f8 0%, var(--bg) 25%, var(--bg) 100%);
  color: var(--text);
}

.container {
  width: min(1100px, 92vw);
  margin: 24px auto 40px;
  display: grid;
  gap: 16px;
}

.page-header h1 {
  margin: 0;
}

.page-header p {
  margin: 6px 0 0;
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 8px 24px rgba(23, 33, 43, 0.06);
}

.hidden {
  display: none;
}

h2,
h3 {
  margin: 0 0 10px;
}

.form-stack {
  display: grid;
  gap: 10px;
}

.auth-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

label {
  display: grid;
  gap: 6px;
  font-size: 0.95rem;
}

input {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 0.95rem;
}

button {
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 10px 12px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 600;
}

button:hover {
  filter: brightness(0.95);
}

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.message {
  margin-top: 8px;
  min-height: 1.2em;
  color: var(--muted);
}

.message.error {
  color: var(--danger);
}

.message.success {
  color: var(--accent);
}

.charts {
  margin-top: 18px;
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.chart-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
}

.canvas-wrap {
  height: 280px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th,
td {
  border-bottom: 1px solid var(--line);
  text-align: left;
  padding: 8px 10px;
}

th {
  background: #f8fbfd;
}

tbody tr:nth-child(odd) {
  background: #fcfeff;
}

@media (max-width: 600px) {
  .container {
    width: 94vw;
    margin-top: 16px;
  }

  .toolbar {
    flex-direction: column;
    align-items: flex-start;
  }
}