:root {
  --bg: #17212b;
  --bg-elevated: #1f2c38;
  --bg-elevated-2: #243342;
  --bg-soft: #202b36;
  --surface: #22303d;
  --surface-hover: #2b3b4b;
  --surface-active: #31465a;
  --border: #314150;
  --text: #e6eef6;
  --text-soft: #9db0c3;
  --text-dim: #7f93a7;
  --accent: #5aa7ff;
  --accent-strong: #6ab3ff;
  --accent-muted: rgba(90, 167, 255, 0.16);
  --success: #55c27a;
  --danger: #ff6b6b;
  --warning: #f5c451;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
}

body {
  overflow-x: hidden;
  overflow-y: auto;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

input[type="file"] {
  color: var(--text-soft);
}

input[type="file"]::file-selector-button {
  margin-right: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  background: var(--surface-hover);
  color: var(--text);
}

.app-shell {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  min-height: 100vh;
  padding: 24px 20px 28px;
  overflow: visible;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(circle at top right, rgba(90, 167, 255, 0.08), transparent 24%),
    radial-gradient(circle at top left, rgba(84, 194, 140, 0.06), transparent 18%),
    linear-gradient(180deg, #17212b 0%, #18232d 100%);
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at top, rgba(90, 167, 255, 0.1), transparent 30%),
    linear-gradient(180deg, #17212b 0%, #101921 100%);
}

.login-card,
.panel-card,
.stat-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.login-card {
  width: min(420px, 100%);
  padding: 24px;
}

.login-title,
.section-title {
  margin: 0 0 6px;
  font-size: 22px;
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.login-subtitle,
.muted {
  color: var(--text-soft);
}

.form-grid,
.panel-grid,
.detail-grid,
.stats-grid,
.users-grid,
.detail-layout,
.split-grid,
.stack-layout {
  display: grid;
  gap: 14px;
}

.form-grid {
  margin-top: 16px;
}

.field-label {
  display: grid;
  gap: 8px;
  font-size: 13px;
  color: var(--text-soft);
}

.field-input,
.field-textarea,
.field-select {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-soft);
  color: var(--text);
  outline: none;
}

.field-input:focus,
.field-textarea:focus,
.field-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(90, 167, 255, 0.14);
}

.field-textarea {
  min-height: 92px;
  resize: vertical;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.button-primary,
.button-secondary,
.button-danger {
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 10px 16px;
  min-height: 42px;
  transition: background-color 140ms ease, border-color 140ms ease, transform 140ms ease;
}

.button-primary:hover,
.button-secondary:hover,
.button-danger:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--accent);
  color: #08233e;
  font-weight: 600;
}

.button-primary:hover {
  background: var(--accent-strong);
}

.button-secondary {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}

.button-secondary:hover {
  background: var(--surface-hover);
}

.button-danger {
  background: rgba(255, 107, 107, 0.16);
  border-color: rgba(255, 107, 107, 0.32);
  color: #ffd4d4;
}

.button-danger:hover {
  background: rgba(255, 107, 107, 0.24);
}

.button-primary:disabled,
.button-secondary:disabled,
.button-danger:disabled,
.nav-tab:disabled {
  opacity: 0.56;
  cursor: default;
  transform: none;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.topbar-meta {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.nav-tabs {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.nav-tab {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-soft);
  padding: 10px 14px;
  border-radius: 12px;
}

.nav-tab:hover {
  background: var(--surface-hover);
  color: var(--text);
}

.nav-tab.active {
  background: var(--accent-muted);
  border-color: rgba(90, 167, 255, 0.32);
  color: var(--accent-strong);
}

.panel-grid {
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  flex: 0 0 auto;
  min-height: auto;
  overflow: visible;
}

.panel-card {
  padding: 22px;
  min-height: 0;
}

.detail-heading {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
}

.detail-grid {
  color: var(--text-soft);
}

.detail-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.table-shell {
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(8, 14, 20, 0.18);
}

.mobile-only {
  display: none;
}

.desktop-only {
  display: block;
}

.signals-table {
  width: 100%;
  min-width: 980px;
  border-collapse: collapse;
}

.signals-table th,
.signals-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  white-space: nowrap;
}

.signals-table th {
  background: #1b2732;
  color: var(--text-dim);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.signals-table tbody tr {
  cursor: pointer;
  transition: background-color 140ms ease;
}

.signals-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.03);
}

.signals-table tbody tr.active {
  background: rgba(90, 167, 255, 0.12);
}

.toolbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.toolbar-row-bottom {
  margin: 12px 0 20px;
}

.upload-field {
  min-width: min(420px, 100%);
}

.signals-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.signals-filter-tabs {
  margin-bottom: 0;
}

.upload-toolbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.upload-action {
  min-width: 220px;
}

.mobile-signal-list {
  display: none;
  gap: 10px;
}

.mobile-signal-card {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  background: var(--surface);
  color: var(--text);
  text-align: left;
}

.mobile-signal-card.active {
  border-color: rgba(90, 167, 255, 0.42);
  background: var(--surface-active);
}

.mobile-signal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.mobile-signal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.mobile-signal-grid span {
  display: block;
  margin-bottom: 4px;
  color: var(--text-dim);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.mobile-signal-grid strong {
  display: block;
  color: var(--text);
  font-size: 13px;
  overflow-wrap: anywhere;
}

.pnl-positive {
  color: var(--success);
}

.pnl-negative {
  color: var(--danger);
}

.detail-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  min-width: 0;
  overflow-wrap: anywhere;
}

.detail-item strong {
  display: block;
  color: var(--text);
  margin-bottom: 6px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.detail-layout {
  min-height: auto;
  overflow: visible;
  padding-right: 0;
  gap: 18px;
}

.detail-topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.back-button {
  margin-bottom: 12px;
}

.image-preview {
  display: block;
  width: 100%;
  max-height: 420px;
  object-fit: contain;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: #0f1720;
}

.split-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.history-list,
.event-list {
  display: grid;
  gap: 10px;
  max-height: 280px;
  overflow: auto;
  padding-right: 4px;
}

.history-item,
.event-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  background: var(--surface);
  color: var(--text-soft);
  overflow-wrap: anywhere;
}

.history-item strong,
.event-item strong {
  display: block;
  color: var(--text);
}

.history-item-head,
.event-item-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 10px;
}

.history-time {
  color: var(--text-dim);
  font-size: 13px;
  white-space: nowrap;
}

.history-change {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 10px;
  align-items: center;
}

.history-from,
.history-to {
  display: block;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-soft);
}

.history-from {
  color: var(--text-dim);
}

.history-to {
  color: var(--text);
}

.history-arrow {
  color: var(--accent);
  font-weight: 700;
}

.event-summary {
  line-height: 1.5;
}

.event-details {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.event-details summary {
  cursor: pointer;
  color: var(--accent);
}

.event-json {
  margin: 10px 0 0;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #18212a;
  color: var(--text-soft);
  font-size: 12px;
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.stats-grid {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  overflow: visible;
}

.stat-card {
  padding: 16px;
}

.stat-card strong {
  display: block;
  font-size: 26px;
  margin-top: 8px;
  color: var(--accent-strong);
}

.users-grid {
  grid-template-columns: 320px minmax(0, 1fr);
  align-items: start;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-soft);
  font-size: 12px;
}

.message {
  margin-bottom: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid transparent;
}

.message.error {
  background: rgba(255, 107, 107, 0.12);
  border-color: rgba(255, 107, 107, 0.24);
  color: #ffd1d1;
}

.message.success {
  background: rgba(85, 194, 122, 0.12);
  border-color: rgba(85, 194, 122, 0.24);
  color: #b9f1ca;
}

.inline-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: #3b4e61;
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background: #476077;
}

@media (max-width: 1280px) {
  .app-shell {
    max-width: 100%;
    padding: 18px 16px 24px;
  }

  .detail-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 1080px) {
  .app-shell {
    min-height: 100vh;
    overflow: visible;
    padding: 14px;
  }

  .panel-grid,
  .split-grid,
  .users-grid {
    grid-template-columns: 1fr;
  }

  .detail-grid {
    grid-template-columns: 1fr;
  }

  .detail-layout,
  .history-list,
  .event-list {
    max-height: none;
    overflow: visible;
  }

  .topbar-meta {
    width: 100%;
    justify-content: flex-start;
  }

  .signals-header,
  .upload-toolbar,
  .detail-topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .upload-action {
    width: 100%;
    min-width: 0;
  }
}

@media (max-width: 820px) {
  .app-shell {
    padding: 12px;
  }

  .panel-grid,
  .split-grid,
  .users-grid,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .panel-card {
    padding: 16px;
  }

  .button-row {
    gap: 8px;
  }
}

@media (max-width: 640px) {
  html,
  body,
  #root {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
  }

  .login-title,
  .section-title {
    font-size: 20px;
  }

  .app-shell,
  .login-shell {
    width: 100%;
    max-width: none;
    margin: 0;
  }

  .topbar {
    margin-bottom: 12px;
  }

  .panel-card,
  .login-card,
  .stat-card {
    border-radius: 14px;
  }

  .login-card {
    padding: 18px;
  }

  .detail-item,
  .history-item,
  .event-item {
    padding: 10px;
  }

  .button-primary,
  .button-secondary,
  .button-danger,
  .nav-tab {
    width: 100%;
    justify-content: center;
  }

  .topbar {
    gap: 12px;
  }

  .topbar-meta {
    gap: 8px;
    flex-direction: column;
    align-items: stretch;
  }

  .topbar-meta .button-secondary,
  .topbar-meta .status-pill {
    width: 100%;
    justify-content: center;
  }

  .status-pill {
    max-width: 100%;
    overflow-wrap: anywhere;
  }

  .desktop-only {
    display: none;
  }

  .mobile-only {
    display: block;
  }

  .nav-tabs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    width: 100%;
  }

  .signals-filter-tabs {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .toolbar-row,
  .toolbar-row-bottom {
    display: grid;
    gap: 10px;
  }

  .upload-field {
    min-width: 0;
  }

  .detail-layout {
    gap: 12px;
  }

  .inline-list {
    gap: 6px;
  }

  .mobile-signal-card {
    padding: 12px;
  }

  .mobile-signal-grid {
    grid-template-columns: 1fr 1fr;
  }

  .history-list,
  .event-list {
    gap: 8px;
  }

  .history-item-head,
  .event-item-head,
  .history-change {
    display: grid;
    grid-template-columns: 1fr;
  }

  .history-arrow {
    display: none;
  }

  .event-item div,
  .history-item div {
    overflow-wrap: anywhere;
    word-break: break-word;
  }
}

@media (max-width: 420px) {
  html,
  body,
  #root {
    width: 100%;
    max-width: 100%;
  }

  .login-title,
  .section-title {
    font-size: 18px;
  }

  .field-input,
  .field-textarea,
  .field-select {
    padding: 10px 11px;
  }

  .app-shell {
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 8px;
  }

  .panel-card,
  .login-card,
  .stat-card {
    border-radius: 12px;
  }

  .mobile-signal-grid {
    grid-template-columns: 1fr;
  }

  .detail-item strong {
    font-size: 12px;
  }

  .signals-filter-tabs {
    grid-template-columns: 1fr;
  }
}