:root {
  --bg-color: #060913;
  --card-bg: rgba(13, 20, 38, 0.5);
  --card-hover: rgba(22, 33, 61, 0.65);
  --card-border: rgba(255, 255, 255, 0.06);
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --primary: hsl(217, 91%, 60%);
  --primary-glow: rgba(59, 130, 246, 0.12);
  --success: hsl(142, 72%, 46%);
  --success-glow: rgba(16, 185, 129, 0.12);
  --danger: hsl(350, 89%, 60%);
  --danger-glow: rgba(239, 68, 68, 0.12);
  --warning: hsl(42, 93%, 47%);
  --warning-glow: rgba(245, 158, 11, 0.12);
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-display: 'Outfit', var(--font-sans);
}

[data-theme="light"] {
  --bg-color: #f8fafc;
  --card-bg: rgba(255, 255, 255, 0.75);
  --card-hover: rgba(255, 255, 255, 0.95);
  --card-border: rgba(15, 23, 42, 0.08);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --primary: hsl(221, 83%, 53%);
  --primary-glow: rgba(99, 102, 241, 0.06);
  --success: hsl(142, 76%, 36%);
  --success-glow: rgba(16, 185, 129, 0.06);
  --danger: hsl(350, 89%, 50%);
  --danger-glow: rgba(239, 68, 68, 0.06);
  --warning: hsl(35, 92%, 40%);
  --warning-glow: rgba(245, 158, 11, 0.06);
}

/* Reset and Global Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  padding: 2.5rem 1rem;
}

/* Background blur decorations */
.background-decor {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.circle {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.1;
}

.circle-1 {
  top: -10%;
  right: -10%;
  width: 50vw;
  height: 50vw;
  background: var(--primary);
}

.circle-2 {
  bottom: -10%;
  left: -10%;
  width: 40vw;
  height: 40vw;
  background: var(--success);
}

/* Container */
.container {
  max-width: 850px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* Glassmorphism utility */
.glass-panel {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 1.5rem;
  margin-bottom: 1.8rem;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
              border-color 0.3s ease,
              background-color 0.3s ease;
}

.glass-panel:hover {
  background: var(--card-hover);
  border-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

/* Header */
.app-header {
  margin-bottom: 2.5rem;
}

.header-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 0.75rem;
}

.title-area {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.2rem;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 50%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] h1 {
  background: linear-gradient(135deg, #0f172a 0%, #334155 50%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .circle {
  opacity: 0.055;
}

.theme-select {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--card-border);
  padding: 0.35rem 0.7rem;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  outline: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.theme-select:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
}

.theme-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.15);
}

[data-theme="light"] .theme-select {
  background: rgba(0, 0, 0, 0.03);
  color: var(--text-primary);
  border: 1px solid rgba(15, 23, 42, 0.12);
}

[data-theme="light"] .theme-select option {
  background: #ffffff;
  color: #0f172a;
}

[data-theme="light"] .theme-select:hover {
  background: rgba(0, 0, 0, 0.06);
}

.badge {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--card-border);
  padding: 0.4rem 0.8rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  font-feature-settings: "tnum" 1;
}

.summary-text {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* Content Sections */
.section-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.section-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.15rem;
  background: var(--primary);
  border-radius: 2px;
}

/* Watchlist Grid & Cards */
.watchlist-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.2rem;
}

.watchlist-card {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.watchlist-card:hover {
  background: var(--card-hover);
  border-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.card-body {
  padding: 1.25rem;
  flex-grow: 1;
}

.card-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.card-title-group {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.card-title-group h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
}

.card-code {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-feature-settings: "tnum" 1;
}

.card-header-info {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.35rem;
  text-align: right;
}

.header-nav {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.header-nav span {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-left: 0.25rem;
  font-feature-settings: "tnum" 1;
}

.header-limit {
  font-size: 0.72rem;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  border: 1px solid var(--card-border);
  font-weight: 600;
}

.header-limit.limit-danger {
  color: var(--danger);
  border-color: rgba(239, 68, 68, 0.25);
  background: rgba(239, 68, 68, 0.05);
}

.header-limit.limit-warning {
  color: var(--warning);
  border-color: rgba(245, 158, 11, 0.25);
  background: rgba(245, 158, 11, 0.05);
}

.header-limit.limit-success {
  color: var(--success);
  border-color: rgba(16, 185, 129, 0.25);
  background: rgba(16, 185, 129, 0.05);
}

/* Decision Banners */
.decision-banner {
  padding: 0.85rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 10px;
  margin-top: 0.75rem;
  margin-bottom: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.decision-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.decision-reason {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* Decision Banner States */
.decision-banner.success {
  background: rgba(16, 185, 129, 0.04);
  border-color: rgba(16, 185, 129, 0.18);
}
.decision-banner.success .decision-header {
  color: var(--success);
}
.decision-banner.success .decision-header::before {
  content: '●';
}

.decision-banner.warning {
  background: rgba(245, 158, 11, 0.04);
  border-color: rgba(245, 158, 11, 0.18);
}
.decision-banner.warning .decision-header {
  color: var(--warning);
}
.decision-banner.warning .decision-header::before {
  content: '●';
}

.decision-banner.danger {
  background: rgba(239, 68, 68, 0.04);
  border-color: rgba(239, 68, 68, 0.18);
}
.decision-banner.danger .decision-header {
  color: var(--danger);
}
.decision-banner.danger .decision-header::before {
  content: '●';
}

/* Card Calculator */
.card-calculator {
  background: rgba(255, 255, 255, 0.012);
  border: 1px solid rgba(255, 255, 255, 0.03);
  border-radius: 12px;
  padding: 0.7rem 0.85rem;
  margin-top: 1rem;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.01);
}

.calc-title {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 0.55rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 28px 1fr;
  align-items: center;
  gap: 0.5rem;
}

.calc-field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.calc-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  font-weight: 500;
}

.calc-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 0.35rem 0.55rem;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.calc-input-wrapper:focus-within {
  border-color: var(--primary);
  background: rgba(0, 0, 0, 0.45);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.12);
}

.calc-unit-prefix {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-right: 0.25rem;
  font-weight: 500;
}

.calc-unit-suffix {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: 0.25rem;
  font-weight: 500;
}

.calc-input-wrapper input {
  width: 100%;
  border: none;
  background: transparent;
  color: var(--text-primary);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  font-weight: 600;
  padding: 0;
  margin: 0;
  outline: none;
  text-align: left;
}

/* Chrome/Safari/Opera/Firefox spin boxes removal */
.calc-input-wrapper input::-webkit-outer-spin-button,
.calc-input-wrapper input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.calc-input-wrapper input[type=number] {
  -moz-appearance: textfield;
}

.calc-divider {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 1rem;
}

.calc-divider-arrow {
  color: var(--text-muted);
  font-size: 0.95rem;
  opacity: 0.4;
  user-select: none;
  font-weight: 700;
}

.calc-input-wrapper:focus-within ~ .calc-divider .calc-divider-arrow {
  color: var(--primary);
  opacity: 0.8;
}

/* Card Depth Table (Order Book) */
.card-depth-wrapper {
  margin-top: 1rem;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.03);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.15);
}

.depth-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.depth-table th {
  background: rgba(255, 255, 255, 0.01);
  padding: 0.45rem 0.6rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.depth-table td {
  padding: 0.35rem 0.6rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.01);
  font-feature-settings: "tnum" 1;
}

.depth-table tr:last-child td {
  border-bottom: none;
}

/* Highlighting Buy 1 and Sell 1 Row Boundary */
.depth-table tr.highlight-row {
  background-color: rgba(255, 255, 255, 0.035);
}

.depth-table tr.highlight-row.sell-1 {
  box-shadow: inset 3px 0 0 var(--danger);
  background-color: rgba(239, 68, 68, 0.03);
}

.depth-table tr.highlight-row.buy-1 {
  box-shadow: inset 3px 0 0 var(--success);
  background-color: rgba(16, 185, 129, 0.03);
}

.depth-level {
  font-weight: 700;
}

.depth-level.sell {
  color: var(--danger);
}

.depth-level.buy {
  color: var(--success);
}

.depth-level.limit {
  color: var(--warning);
}

.premium-stack {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
  font-size: 0.72rem;
  line-height: 1.2;
}

.premium-stack span {
  font-feature-settings: "tnum" 1;
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid var(--card-border);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

th {
  background: rgba(255, 255, 255, 0.02);
  font-weight: 600;
  color: var(--text-primary);
  padding: 0.9rem 1.2rem;
  border-bottom: 1px solid var(--card-border);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

td {
  padding: 0.9rem 1.2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.02);
  color: var(--text-secondary);
  font-feature-settings: "tnum" 1; /* Tabular numbers for clean alignments */
}

tr:last-child td {
  border-bottom: none;
}

tr {
  transition: background-color 0.2s ease;
}

tr:hover td {
  background: rgba(255, 255, 255, 0.015);
  color: var(--text-primary);
}

/* Highlight Cells & Values */
.highlight-up {
  color: var(--danger); /* Chinese financial red for up */
  font-weight: 700;
}

.highlight-down {
  color: var(--success); /* Chinese financial green for down */
  font-weight: 700;
}

/* Text Block Content */
.text-content {
  color: var(--text-secondary);
  line-height: 1.75;
  font-size: 0.95rem;
}

.text-content p {
  margin-bottom: 0.85rem;
}
.text-content p:last-child {
  margin-bottom: 0;
}

/* Error Container */
.error-container {
  text-align: center;
  padding: 4rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
}

.error-icon {
  font-size: 3.5rem;
  animation: pulse 2s infinite ease-in-out;
}

.error-container h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.6rem;
  background: linear-gradient(135deg, #ffffff 0%, #f43f5e 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.error-container p {
  color: var(--text-secondary);
  max-width: 480px;
  line-height: 1.6;
}

/* Footer */
.app-footer {
  text-align: center;
  margin-top: 5rem;
  padding-top: 1.8rem;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.app-footer p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Animations */
.fade-in {
  animation: fadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.8;
  }
}

.hidden {
  display: none !important;
}

/* Loading Skeletons */
.skeleton-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.skeleton-card {
  border-radius: 16px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.03) 25%, rgba(255, 255, 255, 0.06) 50%, rgba(255, 255, 255, 0.03) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border: 1px solid var(--card-border);
}

.skeleton-table {
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 1.2rem;
  background: var(--card-bg);
}

.skeleton-row {
  height: 20px;
  border-radius: 4px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.02) 25%, rgba(255, 255, 255, 0.05) 50%, rgba(255, 255, 255, 0.02) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  margin-bottom: 0.9rem;
}

.skeleton-row.header {
  height: 25px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.04) 25%, rgba(255, 255, 255, 0.07) 50%, rgba(255, 255, 255, 0.04) 75%);
  margin-bottom: 1.6rem;
}

.skeleton-row:last-child {
  margin-bottom: 0;
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Light Theme UI Adjustments */
[data-theme="light"] .depth-table tr.highlight-row {
  background-color: rgba(0, 0, 0, 0.025);
}

[data-theme="light"] .depth-table th {
  background: rgba(0, 0, 0, 0.015);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .depth-table td {
  border-bottom: 1px solid rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .card-depth-wrapper {
  background: rgba(0, 0, 0, 0.015);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .card-calculator {
  background: rgba(0, 0, 0, 0.01);
  border: 1px solid rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .calc-input-wrapper {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(15, 23, 42, 0.12);
}

[data-theme="light"] .calc-input-wrapper input {
  color: var(--text-primary);
}

[data-theme="light"] .app-footer {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .skeleton-card {
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.03) 25%, rgba(0, 0, 0, 0.06) 50%, rgba(0, 0, 0, 0.03) 75%);
  background-size: 200% 100%;
}

[data-theme="light"] .skeleton-row {
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.02) 25%, rgba(0, 0, 0, 0.05) 50%, rgba(0, 0, 0, 0.02) 75%);
  background-size: 200% 100%;
}

[data-theme="light"] .skeleton-row.header {
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.03) 25%, rgba(0, 0, 0, 0.06) 50%, rgba(0, 0, 0, 0.03) 75%);
  background-size: 200% 100%;
}