:root {
  --color-primary: #3EAFFF;
  --color-primary-dark: #2ac0ff;
  --color-primary-light: #5ac8ff;
  --color-success: #00ff88;
  --color-danger: #ff4444;
  --color-warning: #ffaa00;
  --color-info: #3EAFFF;
  
  --color-text: #e6edf5;
  --color-text-muted: #8899aa;
  --color-text-light: #667788;
  --color-text-inverse: #001530;
  
  --color-bg: #001428;
  --color-bg-secondary: #001C3F;
  --color-bg-tertiary: #002040;
  --color-bg-dark: #000d1a;
  --color-bg-card: #001830;
  
  --color-border: rgba(62, 175, 255, 0.15);
  --color-border-light: rgba(62, 175, 255, 0.1);
  
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 20px;
  --font-size-xxl: 24px;
  --font-size-3xl: 28px;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(62, 175, 255, 0.2);
  
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
  
  --header-height: 70px;
  --sidebar-width: 260px;
}

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

html {
  font-size: 16px;
  line-height: 1.6;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image: 
    radial-gradient(ellipse at 10% 10%, rgba(62, 175, 255, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 90% 90%, rgba(0, 255, 136, 0.04) 0%, transparent 50%);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: #ffffff;
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-xxl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

table {
  border-collapse: collapse;
  width: 100%;
}

.hidden { display: none !important; }
.visible { visibility: visible; }
.invisible { visibility: hidden; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.flex-1 { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }

.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }
.text-info { color: var(--color-info); }
.text-sm { font-size: var(--font-size-sm); }
.text-lg { font-size: var(--font-size-lg); }
.text-bold { font-weight: 600; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }

.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.px-md { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
.py-sm { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }

.rounded { border-radius: var(--radius-md); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.border { border: 1px solid var(--color-border); }
.border-t { border-top: 1px solid var(--color-border); }
.border-b { border-bottom: 1px solid var(--color-border); }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.cursor-pointer { cursor: pointer; }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

.skeleton {
  background: linear-gradient(90deg, var(--color-bg-tertiary) 25%, rgba(255, 255, 255, 0.05) 50%, var(--color-bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}

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

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideIn {
  from { transform: translateY(-10px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.fade-in { animation: fadeIn var(--transition-normal); }
.slide-in { animation: slideIn var(--transition-normal); }
.slide-up { animation: slideUp var(--transition-normal); }

.page-container {
  max-width: 1400px;
  margin: 0 auto;
  animation: fadeIn var(--transition-normal);
}

.card {
  background: linear-gradient(180deg, var(--color-bg-card) 0%, rgba(0, 24, 48, 0.95) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md), 0 0 0 1px rgba(255, 255, 255, 0.03) inset;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.card:hover {
  box-shadow: var(--shadow-lg), var(--shadow-glow), 0 0 0 1px rgba(255, 255, 255, 0.05) inset;
}

.card-header {
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: var(--spacing-lg);
}

.card-header h3 {
  font-size: var(--font-size-lg);
  color: #fff;
  margin-bottom: 0;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.page-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: #ffffff;
  margin: 0;
  letter-spacing: -0.5px;
}

.page-subtitle {
  font-size: var(--font-size-md);
  color: var(--color-text-muted);
  margin-top: var(--spacing-xs);
}

/* Responsive breakpoints - Bootstrap-like system */
@media (max-width: 575px) {
  .page-container {
    padding: var(--spacing-sm);
  }
  
  .hide-mobile { display: none !important; }
  
  .page-title {
    font-size: var(--font-size-xxl);
  }
}

@media (min-width: 576px) and (max-width: 767px) {
  .page-container {
    padding: var(--spacing-md);
  }
  
  .hide-mobile { display: none !important; }
  
  .page-title {
    font-size: var(--font-size-xxl);
  }
}

@media (min-width: 768px) and (max-width: 991px) {
  .page-container {
    padding: var(--spacing-md);
  }
  
  .hide-mobile { display: none !important; }
  
  .page-title {
    font-size: var(--font-size-xxl);
  }
}

@media (min-width: 992px) {
  .hide-desktop { display: none !important; }
}

/* Operation Info Styles */
.op-from { color: var(--color-primary); font-weight: 500; }
.op-to { color: var(--color-success); font-weight: 500; }
.op-account { color: var(--color-primary); }
.op-amount { color: #ffffff; font-weight: 500; }
.op-symbol { color: var(--color-warning); font-weight: 500; }
.op-price { color: var(--color-text-muted); }
.text-mono { font-family: 'SF Mono', 'Consolas', 'Monaco', monospace; font-size: 0.85em; }
.memo-text { color: var(--color-text-muted); font-size: 0.85em; font-style: italic; }

.history-pagination {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-top: 1px solid var(--color-border);
  margin-top: 12px;
}
.history-status { font-size: 0.9em; color: var(--color-text-muted); }
.pagination-controls { display: flex; gap: 8px; align-items: center; }
.pagination-controls button { padding: 6px 12px; }
.pagination-controls button:disabled { opacity: 0.5; cursor: not-allowed; }