:root {
  color-scheme: light;
  --page-bg: #f5f5f7;
  --surface: #ffffff;
  --surface-muted: #f2f2f4;
  --surface-border: rgba(0, 0, 0, 0.1);
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --accent: #0071e3;
  --accent-strong: #005ac2;
  --success: #34c759;
  --error: #ff3b30;
}

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

body {
  min-height: 100vh;
  background: var(--page-bg);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Segoe UI", sans-serif;
  line-height: 1.5;
}

main {
  padding: 32px 16px 64px;
}

.container {
  max-width: 960px;
  margin: 0 auto;
}

.header {
  margin-bottom: 24px;
}

.header-content {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 20px;
}

.header-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--text-secondary);
}

.header-title {
  font-size: 28px;
  font-weight: 600;
}

@media (min-width: 768px) {
  main {
    padding: 48px 24px 80px;
  }
  
  .header-title {
    font-size: 36px;
  }
}

.header-desc {
  font-size: 14px;
  color: var(--text-secondary);
}

.tab-list {
  display: flex;
  flex-wrap: nowrap;
  gap: 4px;
  overflow-x: auto;
  border-bottom: 1px solid var(--surface-border);
  padding-bottom: 6px;
}

.tab-button {
  border: none;
  padding: 8px 12px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.tab-button:hover {
  color: var(--text-primary);
}

.tab-button-active {
  color: var(--text-primary);
  border-color: var(--accent);
}

.tab-desc {
  margin-top: 12px;
  font-size: 12px;
  color: var(--text-secondary);
}

.tool-section {
  padding: 24px 0;
  border-bottom: 1px solid var(--surface-border);
}

.tool-section:last-child {
  border-bottom: none;
}

.section-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 18px;
  font-weight: 600;
}

.section-desc {
  font-size: 13px;
  color: var(--text-secondary);
}

.form-group {
  margin-top: 12px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 12px;
}

@media (min-width: 768px) {
  .form-row {
    flex-direction: row;
    align-items: flex-end;
  }
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 12px;
}

@media (min-width: 768px) {
  .form-grid {
    grid-template-columns: 2fr 1fr;
  }
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  display: block;
  font-size: 12px;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.field {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  padding: 10px 12px;
  font-size: 14px;
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  font-family: inherit;
}

.field::placeholder {
  color: var(--text-secondary);
}

.field:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.15);
}

.textarea {
  min-height: 72px;
  resize: none;
}

.flex-1 {
  flex: 1;
}

.flex-2 {
  flex: 2;
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease;
  border: none;
  font-family: inherit;
}

.button:active {
  transform: scale(0.98);
}

.button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.button-primary {
  background: var(--accent);
  color: white;
}

.button-primary:hover:not(:disabled) {
  background: var(--accent-strong);
}

.button-secondary {
  background: var(--surface-muted);
  color: var(--text-primary);
  border: 1px solid var(--surface-border);
}

.button-secondary:hover:not(:disabled) {
  background: #e8e8ed;
}

.dropdown {
  position: relative;
  width: 100%;
}

.dropdown-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  text-align: left;
  cursor: pointer;
  height: 42px;
}

.dropdown-caret {
  display: inline-flex;
  width: 18px;
  height: 18px;
  border-radius: 999px;
  border: 1px solid var(--surface-border);
  background: var(--surface-muted);
  position: relative;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.dropdown-caret::before {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid var(--text-secondary);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  border-radius: 12px;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
  padding: 4px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  z-index: 20;
}

.dropdown-item {
  border: none;
  border-radius: 8px;
  padding: 8px 10px;
  text-align: left;
  background: transparent;
  color: var(--text-primary);
  font-size: 14px;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease;
  font-family: inherit;
}

.dropdown-item:hover {
  background: var(--surface-muted);
}

.dropdown-item-active {
  background: rgba(0, 113, 227, 0.1);
  color: var(--accent);
}

.result-list {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.result-grid {
  margin-top: 20px;
  display: grid;
  gap: 10px;
}

@media (min-width: 768px) {
  .result-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.result-area {
  margin-top: 20px;
}

.result-card {
  border-radius: 12px;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  padding: 14px;
}

.result-card-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  font-size: 14px;
}

.result-card-meta {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 6px;
}

.status-blocked {
  color: var(--error);
}

.status-normal {
  color: var(--success);
}

.chart-container {
  border-radius: 12px;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  padding: 16px;
  margin-bottom: 20px;
}

.chart-canvas {
  width: 100%;
  height: 180px;
}

.table-header {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  border-radius: 10px;
  border: 1px solid var(--surface-border);
  background: var(--surface-muted);
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}

.table-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  border-radius: 10px;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  padding: 8px 12px;
  font-size: 14px;
  margin-top: 6px;
}

.table-row span:nth-child(2),
.table-row span:nth-child(3) {
  text-align: right;
  font-weight: 500;
}

.log-group {
  border-radius: 12px;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  padding: 14px;
  margin-bottom: 16px;
}

.log-group-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
}

.log-timeline {
  position: relative;
  padding-left: 16px;
}

.log-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--surface-border);
}

.log-item {
  position: relative;
  border-radius: 10px;
  border: 1px solid var(--surface-border);
  background: var(--surface-muted);
  padding: 10px 12px;
  font-size: 14px;
  margin-bottom: 12px;
}

.log-item:last-child {
  margin-bottom: 0;
}

.log-item::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.log-item-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

.log-item-meta {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 1000;
}

.toast {
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 14px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  animation: slideIn 0.3s ease;
}

.toast-success {
  background: var(--success);
  color: white;
}

.toast-error {
  background: var(--error);
  color: white;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.hidden {
  display: none !important;
}

.text-secondary {
  color: var(--text-secondary);
}

.text-center {
  text-align: center;
}