:root {
  --accent: #00897b;
  --accent-light: #e0f2f1;
  --accent-medium: #4db6ac;
  --accent-dark: #00695c;
  --accent-hover: #00796b;
  --bg: #f5f7f9;
  --card: #ffffff;
  --text: #263238;
  --text-secondary: #546e7a;
  --border: #e0e0e0;
  --success: #2e7d32;
  --warning: #f9a825;
  --danger: #c62828;
  --radius: 10px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  height: 100vh;
  overflow: hidden;
}

.app {
  display: flex;
  height: 100vh;
}

/* ===== Левая панель ===== */
.sidebar {
  width: 25%;
  min-width: 260px;
  max-width: 340px;
  background: var(--card);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar-header {
  padding: 28px 24px 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar-header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-dark);
  margin-bottom: 6px;
}

.sidebar-header p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.criteria-list {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.criteria-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid transparent;
  text-align: left;
  background: none;
  width: 100%;
}

.criteria-item:hover {
  background: var(--accent-light);
  border-color: var(--accent-medium);
}

.criteria-item.active {
  background: var(--accent-light);
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.criteria-item .num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.criteria-item.active .num {
  background: var(--accent-dark);
}

.criteria-item .info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.criteria-item .title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
}

.criteria-item .subtitle {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.3;
}

/* ===== Правая панель ===== */
.main {
  flex: 1;
  overflow-y: auto;
  padding: 32px 40px;
}

.main-inner {
  max-width: 720px;
  margin: 0 auto;
}

.section-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-dark);
  margin-bottom: 8px;
}

.section-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.5;
}

.formula-card {
  background: #fafafa;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 28px;
  overflow-x: auto;
}

.formula-card .katex {
  font-size: 1.05em;
}

.inputs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.input-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.input-group input {
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  background: var(--card);
  transition:
    border-color 0.15s,
    box-shadow 0.15s;
  width: 100%;
}

.input-group input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 137, 123, 0.12);
}

.results-area {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.result-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.result-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.result-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.result-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-dark);
  font-variant-numeric: tabular-nums;
}

.result-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

.interpretation {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
}

.interp-negligible {
  background: #eceff1;
  color: #78909c;
}
.interp-small {
  background: #e0f2f1;
  color: var(--accent-dark);
}
.interp-medium {
  background: #fff8e1;
  color: #f57f17;
}
.interp-large {
  background: #e8f5e9;
  color: var(--success);
}

.scale-hint {
  font-size: 0.78rem;
  color: var(--text-secondary);
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.scale-hint span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.dot.negligible {
  background: #b0bec5;
}
.dot.small {
  background: var(--accent-medium);
}
.dot.medium {
  background: var(--warning);
}
.dot.large {
  background: var(--success);
}

.error-msg {
  color: var(--danger);
  font-size: 0.85rem;
  font-weight: 500;
}

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

/* Табы для связанных выборок */
.method-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.method-tab {
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.15s;
}

.method-tab:hover {
  border-color: var(--accent-medium);
  color: var(--accent-dark);
}

.method-tab.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.method-panel {
  display: none;
}
.method-panel.active {
  display: block;
}

/* Мобильная адаптация */
@media (max-width: 860px) {
  .app {
    flex-direction: column;
    height: auto;
    overflow: visible;
  }
  .sidebar {
    width: 100%;
    max-width: none;
    min-width: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .main {
    padding: 20px;
  }
  .criteria-list {
    flex-direction: row;
    flex-wrap: wrap;
    padding: 8px;
  }
  .criteria-item {
    width: auto;
    flex: 1 1 200px;
  }
  body {
    height: auto;
    overflow: visible;
  }
}