/* ============================================================
   CRPS Power Monitor — Complete Stylesheet
   ============================================================ */

/* ===== 1. CSS Custom Properties ===== */
:root {
  /* Light theme */
  --bg-page: #f5f7fa;
  --bg-card: rgba(255, 255, 255, 0.65);
  --bg-card-blur: 20px;
  --bg-card-border: rgba(255, 255, 255, 0.4);
  --bg-card-inset: rgba(255, 255, 255, 0.2);
  --bg-card-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
  --bg-nav: rgba(255, 255, 255, 0.75);
  --bg-nav-blur: 20px;
  --bg-nav-border: rgba(255, 255, 255, 0.4);

  --primary: #0071e3;
  --primary-hover: #0077ed;
  --primary-active: #006edb;
  --primary-container: #a6c8ff;
  --primary-gradient: linear-gradient(180deg, #47a1ff 0%, #0071e3 100%);
  --primary-gradient-hover: linear-gradient(180deg, #54abff 0%, #0077ed 100%);
  --on-primary: #ffffff;

  --text-primary: #1d1d1f;
  --text-secondary: #86868b;
  --text-on-card: #1d1d1f;
  --text-placeholder: #aeaeb2;

  --success: #22c55e;
  --success-bg: rgba(34, 197, 94, 0.1);
  --success-text: #16a34a;
  --warning: #fbbf24;
  --warning-bg: rgba(251, 191, 36, 0.1);
  --warning-text: #d97706;
  --error: #ff6b35;
  --error-bg: rgba(255, 107, 53, 0.1);
  --error-text: #ea580c;

  --surface: #ffffff;
  --surface-container: #ffffff;
  --outline: #d1d5db;
  --outline-variant: #e5e7eb;

  --radius-card: 1.25rem;
  --radius-button: 9999px;
  --radius-chip: 9999px;
  --radius-modal: 1rem;
}

/* Dark theme */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-page: #131313;
    --bg-card: rgba(255, 255, 255, 0.08);
    --bg-card-blur: 20px;
    --bg-card-border: rgba(255, 255, 255, 0.12);
    --bg-card-inset: rgba(255, 255, 255, 0.06);
    --bg-card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --bg-nav: rgba(18, 18, 18, 0.7);
    --bg-nav-blur: 20px;
    --bg-nav-border: rgba(255, 255, 255, 0.08);

    --primary: #d5e3ff;
    --primary-hover: #e0ebff;
    --primary-active: #c5d7f5;
    --primary-container: #3d5f90;
    --primary-gradient: linear-gradient(180deg, #6a8fc7 0%, #3d5f90 100%);
    --primary-gradient-hover: linear-gradient(180deg, #7a9fd7 0%, #4a6fa0 100%);
    --on-primary: #001c3b;

    --text-primary: #e5e2e1;
    --text-secondary: #c1c6d3;
    --text-on-card: #e5e2e1;
    --text-placeholder: #6b7280;

    --success: #4ade80;
    --success-bg: rgba(74, 222, 128, 0.1);
    --success-text: #86efac;
    --warning: #fbbf24;
    --warning-bg: rgba(251, 191, 36, 0.1);
    --warning-text: #fde68a;
    --error: #ffb4ab;
    --error-bg: rgba(255, 180, 171, 0.1);
    --error-text: #ffb4ab;

    --surface: #121212;
    --surface-container: #1e1e1e;
    --outline: #8d919a;
    --outline-variant: #43474f;
  }
}

/* ===== 2. Reset & Base ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-page);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.3s ease;
}

button {
  font-family: inherit;
  border: none;
  cursor: pointer;
  outline: none;
}

/* ===== 3. App Container ===== */
.liquid-glass {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  backdrop-filter: blur(var(--bg-card-blur));
  -webkit-backdrop-filter: blur(var(--bg-card-blur));
}

.liquid-glass-nav {
  background: var(--bg-nav);
  border-bottom: 1px solid var(--bg-nav-border);
  backdrop-filter: blur(var(--bg-nav-blur));
  -webkit-backdrop-filter: blur(var(--bg-nav-blur));
}

/* ===== 5. App Container ===== */
#app {
  position: relative;
  z-index: 3;
  min-height: 100vh;
}

/* ===== 6. Top Navigation ===== */
#top-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 0 32px;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: 24px;
}

.brand-icon {
  font-size: 26px;
  color: var(--primary);
  font-variation-settings: 'FILL' 0;
  line-height: 1;
}

.brand-text {
  font-size: 20px;
  font-weight: 700;
  font-family: 'Noto Sans SC', sans-serif;
  background: linear-gradient(135deg, #1d1d1f, #0071e3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

@media (prefers-color-scheme: dark) {
  .brand-text {
    background: linear-gradient(135deg, #e5e2e1, #d5e3ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
}

.nav-center {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.tab-bar {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 12px;
}

@media (prefers-color-scheme: dark) {
  .tab-bar {
    background: rgba(255, 255, 255, 0.05);
  }
}

.tab-btn {
  padding: 8px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  background: transparent;
  color: var(--text-secondary);
}

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

.tab-btn.active {
  background: #ffffff;
  color: var(--primary);
}

@media (prefers-color-scheme: dark) {
  .tab-btn.active {
    background: rgba(255, 255, 255, 0.1);
    color: var(--primary);
  }
}

/* ===== 7. Status Indicator ===== */
.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  border-radius: 9999px;
  background: rgba(0, 0, 0, 0.05);
}

@media (prefers-color-scheme: dark) {
  .status-indicator {
    background: rgba(255, 255, 255, 0.05);
  }
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--outline);
  flex-shrink: 0;
}

.status-dot.connected {
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
  animation: pulse 2s ease-in-out infinite;
}

.status-dot.connecting {
  background: var(--warning);
  animation: blink 1s ease-in-out infinite;
}

.status-dot.alert {
  background: var(--error);
  animation: blink 1s ease-in-out infinite;
}

.status-text {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* ===== 8. Connect Button ===== */
.connect-btn {
  height: 36px;
  padding: 0 24px;
  border-radius: 9999px;
  background: var(--primary);
  color: var(--on-primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
}

.connect-btn .material-symbols-outlined {
  font-size: 18px;
  font-variation-settings: 'FILL' 1;
}

.connect-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ===== 9. Power Switch (Apple-style Toggle) ===== */
.power-switch {
  width: 52px;
  height: 28px;
  position: relative;
  cursor: pointer;
  user-select: none;
  flex-shrink: 0;
  transition: opacity 300ms;
}

.power-switch.disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.switch-track {
  width: 100%;
  height: 100%;
  border-radius: 14px;
  position: relative;
  background: #e5e5ea;
  transition: background 350ms cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}

@media (prefers-color-scheme: dark) {
  .switch-track {
    background: #39393d;
  }
}

.switch-track.on {
  background: #22c55e;
}

@media (prefers-color-scheme: dark) {
  .switch-track.on {
    background: #22c55e;
  }
}

.switch-knob {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #ffffff;
  position: absolute;
  top: 2px;
  left: 2px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2), 0 0 0 0.5px rgba(0,0,0,0.04);
  transition: left 350ms cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 2;
}

.switch-track.on .switch-knob {
  left: 26px;
}

/* ===== 10. Main Content ===== */
#main-content {
  position: relative;
  z-index: 3;
}

/* ===== 11. Tab Content ===== */
.tab-content {
  display: none;
  position: relative;
  z-index: 3;
}

.tab-content.active {
  display: block;
}

/* ===== 12. Disconnected View ===== */
.view {
  display: flex;
  align-items: center;
  justify-content: center;
}

#disconnected-view {
  min-height: calc(100vh - 64px);
  padding: 40px 32px;
}

.disconnected-card {
  max-width: 480px;
  width: 100%;
  border-radius: var(--radius-card);
  padding: 48px 40px;
  text-align: center;
}

.btn-connect-large {
  padding: 0 48px;
  height: 48px;
  border-radius: 9999px;
  background: var(--primary);
  color: var(--on-primary);
  font-size: 20px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-connect-large .material-symbols-outlined {
  font-size: 24px;
  font-variation-settings: 'FILL' 1;
}

.guidance {
  margin-top: 32px;
  text-align: left;
}

.guidance-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
}

.guidance-item + .guidance-item {
  border-top: 1px solid var(--outline-variant);
}

.guidance-icon {
  font-size: 20px;
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.guidance-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.guidance-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ===== 13. Connecting Overlay ===== */
#connecting-view {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.3);
}

@media (prefers-color-scheme: dark) {
  #connecting-view {
    background: rgba(0, 0, 0, 0.5);
  }
}

#connecting-view.hidden {
  display: none;
}

.spinner-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 16px;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--outline-variant);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-text {
  font-size: 16px;
  color: var(--text-primary);
  font-weight: 500;
}

/* ===== 14. Monitor Grid (Tab 1) ===== */
.monitor-grid {
  max-width: 1440px;
  margin: 0 auto;
  padding: 24px 32px;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 24px;
}

/* ===== 15. Left Column: Data Cards ===== */
.col-left {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.data-card {
  border-radius: var(--radius-card);
  padding: 24px;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.card-icon {
  font-size: 20px;
  color: var(--primary);
}

.card-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-field {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 8px 0;
  border-bottom: 1px solid var(--outline-variant);
}

.card-field:last-child {
  border-bottom: none;
}

.field-label {
  font-size: 13px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.field-value {
  font-size: 24px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-primary);
  text-align: right;
  min-width: 60px;
}

.field-unit {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-secondary);
  margin-left: 4px;
  flex-shrink: 0;
}

/* ===== 16. Right Column: Charts ===== */
.col-right {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Chip bar */
.chip-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 0;
}

.chip {
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  background: transparent;
  border: 1px solid var(--outline);
  color: var(--text-secondary);
  transition: all 200ms;
}

.chip:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.chip.selected {
  background: var(--primary);
  color: var(--on-primary);
  border-color: var(--primary);
}

@media (prefers-color-scheme: dark) {
  .chip.selected {
    background: var(--primary-container);
    color: var(--text-primary);
    border-color: var(--primary-container);
  }
}

/* Chart grid */
.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.chart-card {
  height: 280px;
  border-radius: var(--radius-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.chart-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--outline-variant);
  flex-shrink: 0;
}

.chart-card-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
}

.chart-card-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.live-badge {
  padding: 2px 8px;
  border-radius: 9999px;
  font-size: 10px;
  font-weight: 700;
  background: rgba(0, 113, 227, 0.1);
  color: var(--primary);
  text-transform: uppercase;
}

.chart-pause-btn {
  cursor: pointer;
  color: var(--text-secondary);
  transition: color 200ms;
  display: flex;
  align-items: center;
}

.chart-pause-btn:hover {
  color: var(--primary);
}

.chart-pause-btn .material-symbols-outlined {
  font-size: 18px;
}

.chart-canvas-container {
  flex: 1;
  min-height: 0;
}

/* ===== 17. Status Register Card (Simple) ===== */
.status-card-simple {
  border-radius: var(--radius-card);
  padding: 16px;
}

.status-bar {
  height: 28px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--success-bg);
  border: 1px solid var(--success);
}

.status-bar-text {
  font-size: 14px;
  font-weight: 700;
  color: var(--success-text);
}

.status-bar.alert {
  background: var(--error-bg);
  border-color: var(--error);
}

.status-bar.alert .status-bar-text {
  color: var(--error-text);
}

.status-reg-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 12px;
}

.status-reg-cell {
  background: rgba(0, 0, 0, 0.03);
  border-radius: 8px;
  padding: 8px 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

@media (prefers-color-scheme: dark) {
  .status-reg-cell {
    background: rgba(255, 255, 255, 0.05);
  }
}

.reg-icon {
  font-size: 14px;
  color: var(--primary);
}

.reg-label {
  font-size: 12px;
  color: var(--text-secondary);
}

.reg-value {
  font-size: 14px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--primary);
  margin-left: auto;
}

/* ===== 18. Device Grid (Tab 2) ===== */
.device-grid {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.device-card {
  border-radius: var(--radius-card);
  padding: 24px;
}

.device-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--outline-variant);
}

.device-header-icon {
  width: 40px;
  height: 40px;
  background: var(--primary-container);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.device-header-icon .material-symbols-outlined {
  font-size: 20px;
  color: var(--primary);
}

.device-header-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.device-table {
  display: flex;
  flex-direction: column;
}

.device-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 8px;
  border-bottom: 1px solid var(--outline-variant);
}

.device-row:last-child {
  border-bottom: none;
}

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

.device-value {
  font-size: 14px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--primary);
  font-weight: 500;
  text-align: right;
}

.device-value.loading {
  color: var(--text-placeholder);
}

/* ===== 19. Register Groups (Detailed) ===== */
.reg-groups-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 16px;
}

.reg-group {
  background: var(--outline-variant);
  border-radius: 12px;
  padding: 16px;
}

@media (prefers-color-scheme: dark) {
  .reg-group {
    background: rgba(255, 255, 255, 0.05);
  }
}

.reg-group-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.reg-group-icon {
  font-size: 20px;
  color: var(--primary);
}

.reg-group-name {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
}

.reg-group-value {
  font-size: 14px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: 8px;
}

.reg-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 9999px;
  font-size: 12px;
  font-weight: 500;
  background: var(--success-bg);
  color: var(--success-text);
}

.reg-chip.alert {
  background: var(--error-bg);
  color: var(--error-text);
}

.chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
}

.reg-chip.alert .chip-dot {
  background: var(--error);
  box-shadow: 0 0 6px var(--error);
}

/* ===== 20. Toast ===== */
#toast-container {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  width: 300px;
  min-height: 56px;
  border-radius: 8px;
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  font-size: 14px;
  font-weight: 500;
  pointer-events: auto;
  animation: toast-in 300ms ease-out, toast-out 300ms ease-in 2.7s forwards;
}

.toast .material-symbols-outlined {
  font-size: 20px;
  flex-shrink: 0;
}

.toast-success {
  background: var(--success-bg);
  border-left: 3px solid var(--success);
  color: var(--success-text);
}

.toast-warning {
  background: var(--warning-bg);
  border-left: 3px solid var(--warning);
  color: var(--warning-text);
}

.toast-error {
  background: var(--error-bg);
  border-left: 3px solid var(--error);
  color: var(--error-text);
}

/* ===== 21. Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 250;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fade-in 200ms;
}

@media (prefers-color-scheme: dark) {
  .modal-overlay {
    background: rgba(0, 0, 0, 0.6);
  }
}

.modal-overlay.hidden {
  display: none;
}

.modal-card {
  width: 480px;
  max-width: 90vw;
  border-radius: var(--radius-modal);
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.2);
  padding: 32px;
  animation: modal-scale-in 200ms ease-out;
}

.modal-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.modal-body {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 24px;
}

.modal-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.modal-btn {
  width: 100%;
  height: 40px;
  border-radius: 9999px;
  background: var(--primary);
  color: var(--on-primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.modal-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
}

.modal-checkbox input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
}

/* ===== 22. Animations ===== */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.2); }
}

@keyframes blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0.3; }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

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

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

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modal-scale-in {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* ===== 23. Utility ===== */
.hidden {
  display: none !important;
}