:root {
  /* Light Theme */
  --primary: #0f172a;
  --primary-light: #1e293b;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #10b981;
  --success-bg: #ecfdf5;
  --danger: #ef4444;
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-hover: #f1f5f9;
  --text-main: #0f172a;
  --text-sub: #64748b;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --radius: 16px;
  --font-main: "Plus Jakarta Sans", sans-serif;
  --sidebar-width: 320px;
}

[data-theme="dark"] {
  /* Dark Theme */
  --primary: #f8fafc;
  --primary-light: #e2e8f0;
  --accent: #60a5fa;
  --accent-hover: #3b82f6;
  --success: #34d399;
  --success-bg: rgba(16, 185, 129, 0.1);
  --danger: #f87171;
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-hover: #334155;
  --text-main: #f8fafc;
  --text-sub: #94a3b8;
  --border: #334155;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-main);
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition:
    background-color 0.3s,
    color 0.3s;
}

/* --- Layout --- */
.app-container {
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Mobile Header (Hamburger + Brand) */
.mobile-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.menu-btn {
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.menu-btn:hover {
  background: var(--surface-hover);
  border-radius: 8px;
}

.close-sidebar-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-sub);
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  border-radius: 8px;
  transition: all 0.2s ease;
  width: 32px;
  height: 32px;
}

.close-sidebar-btn:hover {
  color: var(--danger);
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--danger);
  transform: scale(1.05);
}

.close-sidebar-btn:active {
  transform: scale(0.95);
}

/* Collapse Button */
.collapse-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-sub);
  cursor: pointer;
  padding: 0.5rem;
  display: none;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  border-radius: 8px;
  transition: all 0.2s ease;
  width: 32px;
  height: 32px;
}

.collapse-btn:hover {
  color: var(--accent);
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--accent);
  transform: scale(1.05);
}

.collapse-btn:active {
  transform: scale(0.95);
}

/* Sidebar (Mobile Drawer) */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--surface);
  border-right: 1px solid var(--border);
  z-index: 100;
  transform: translateX(-100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
}

.sidebar.open {
  transform: translateX(0);
}

.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 90;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  backdrop-filter: blur(2px);
}

.sidebar-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  min-height: 0; /* Fix for flex container scrolling */
}

.sidebar-content > * {
  flex-shrink: 0; /* Prevent children from compressing - scroll instead */
}

.brand {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  flex-shrink: 0;
}

/* Main Content */
.main-content {
  flex: 1;
  padding: 1.5rem;
  width: 100%;
  max-width: 100%;
}

/* --- Components --- */

/* Inputs */
.section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-sub);
  font-weight: 700;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.input-group {
  margin-bottom: 1rem;
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

input,
select {
  width: 100%;
  padding: 0.75rem;
  padding-left: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: all 0.2s ease;
  background: var(--bg);
  color: var(--text-main);
  appearance: none;
}

input:hover,
select:hover {
  border-color: var(--text-sub);
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.prefix {
  position: absolute;
  left: 1rem;
  color: var(--text-sub);
  font-weight: 500;
  pointer-events: none;
}

.suffix {
  position: absolute;
  right: 1rem;
  color: var(--text-sub);
  font-weight: 500;
  pointer-events: none;
}

input.has-prefix {
  padding-left: 2rem;
}

input.has-suffix {
  padding-right: 3.5rem;
}

/* Toggle Switch */
.toggle-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding: 0.5rem 0;
}

.toggle-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-main);
}

.switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--border);
  transition: 0.3s;
  border-radius: 24px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.3s;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

input:checked + .slider {
  background-color: var(--accent);
}

input:checked + .slider:before {
  transform: translateX(18px);
}

/* Accordion */
.accordion {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 1rem;
}

.accordion-header {
  width: 100%;
  padding: 1rem;
  background: var(--surface-hover);
  border: none;
  text-align: left;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.accordion-content {
  padding: 1rem;
  display: none;
  background: var(--surface);
  border-top: 1px solid var(--border);
}

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

.accordion.active .accordion-header svg {
  transform: rotate(180deg);
}

/* Action Buttons */
.action-buttons {
  display: flex;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
  z-index: 10;
}

.btn {
  flex: 1;
  padding: 0.75rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--text-main);
  color: var(--bg);
  border: none;
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-main);
}

.btn-outline:hover {
  border-color: var(--text-sub);
  background: var(--surface-hover);
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
  border-radius: 8px;
}

/* Header & Summary */
.header {
  margin-bottom: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

h1 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.subtitle {
  color: var(--text-sub);
  font-size: 0.9rem;
}

.top-controls {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.theme-toggle {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-main);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
}

.theme-toggle:hover {
  background: var(--surface-hover);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.5rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.card-label {
  font-size: 0.85rem;
  color: var(--text-sub);
  margin-bottom: 0.5rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.03em;
}

.card-sub {
  font-size: 0.85rem;
  color: var(--success);
  margin-top: 0.5rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.card.highlight {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  border: none;
  color: white;
}

.card.highlight .card-label {
  color: rgba(255, 255, 255, 0.8);
}

.card.highlight .card-value {
  color: white;
}

.card.highlight .card-sub {
  color: rgba(255, 255, 255, 0.9);
}

/* Charts */
.charts-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.chart-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.5rem;
  height: 350px;
  position: relative;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.chart-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
}

.chart-canvas-wrapper {
  flex: 1;
  position: relative;
  min-height: 0;
}

.chart-canvas-wrapper canvas {
  cursor: crosshair;
  width: 100%;
  height: 100%;
  display: block;
}

.chart-legend {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  justify-content: center;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-main);
}

.legend-color {
  width: 12px;
  height: 12px;
  border-radius: 4px;
}

.legend-dashed {
  background: repeating-linear-gradient(
    90deg,
    var(--text-sub) 0px,
    var(--text-sub) 4px,
    transparent 4px,
    transparent 8px
  );
}

.legend-value {
  font-weight: 600;
}

/* Tooltip */
.chart-tooltip {
  position: absolute;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  font-size: 0.85rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
  box-shadow: var(--shadow-md);
  z-index: 100;
  min-width: 150px;
}

.chart-tooltip.show {
  opacity: 1;
}

.tooltip-title {
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-main);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

.tooltip-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.35rem;
  color: var(--text-sub);
}

.tooltip-label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.tooltip-value {
  font-weight: 600;
  color: var(--text-main);
}

/* Market Rates */
.market-rates {
  margin-top: 2rem;
  margin-bottom: 2rem;
}

.market-rates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}

.rate-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all 0.2s;
  text-decoration: none;
  color: var(--text-main);
  position: relative;
  overflow: hidden;
}

.rate-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.bank-logo {
  height: 32px;
  width: auto;
  margin-bottom: 0.75rem;
  object-fit: contain;
}

.bank-logo-fallback {
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  color: var(--accent);
}

.rate-display {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.rate-disclaimer {
  font-size: 0.7rem;
  color: var(--text-sub);
}

.rate-badge {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: var(--success-bg);
  color: var(--success);
  font-size: 0.6rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 20px;
  text-transform: uppercase;
}

/* Table */
.table-container {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.table-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.table-wrapper {
  text-align: left;
  padding: 0.75rem;
  background: var(--surface-hover);
  color: var(--text-sub);
  font-weight: 600;
  position: sticky;
  top: 0;
  z-index: 10;
  white-space: nowrap;
}

td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-main);
  white-space: nowrap;
}

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

tr:hover td {
  background: var(--surface-hover);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  backdrop-filter: blur(4px);
  padding: 1rem;
}

.modal-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--surface);
  padding: 2rem;
  border-radius: 24px;
  width: 100%;
  max-width: 500px;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px);
  transition: transform 0.2s;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-overlay.show .modal {
  transform: translateY(0);
}

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

.close-modal-btn {
  background: none;
  border: none;
  color: var(--text-sub);
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: -0.5rem;
}

.close-modal-btn:hover {
  color: var(--text-main);
  background: var(--surface-hover);
  border-radius: 8px;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
}

.scenario-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: 300px;
  overflow-y: auto;
  margin-bottom: 1.5rem;
}

.scenario-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.scenario-item:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
}

.scenario-info h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
}

.scenario-info p {
  font-size: 0.8rem;
  color: var(--text-sub);
}

.delete-btn {
  color: var(--danger);
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  opacity: 0.7;
}

.delete-btn:hover {
  opacity: 1;
}

/* --- Desktop Breakpoint (1024px+) --- */
@media (min-width: 1024px) {
  body {
    padding: 2rem;
    display: flex;
    justify-content: center;
    align-items: flex-start;
  }

  .app-container {
    display: grid;
    grid-template-columns: 380px 1fr;
    grid-template-rows: 1fr;
    gap: 0;
    max-width: 1600px;
    width: 100%;
    background: var(--surface);
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    height: calc(100dvh - 4rem);
    min-height: 0;
    transition: grid-template-columns 0.3s ease;
  }

  .footer {
    display: none;
  }

  .app-container.sidebar-collapsed {
    grid-template-columns: 60px 1fr;
  }

  .mobile-header {
    display: none;
  }

  .sidebar-overlay {
    display: none;
  }

  .sidebar {
    position: relative;
    transform: none;
    width: auto;
    height: 100%;
    max-height: 100%;
    box-shadow: none;
    z-index: 1;
    border-right: 1px solid var(--border);
    min-height: 0;
    overflow: hidden;
  }

  .sidebar-content {
    padding: 2rem;
    transition: padding 0.3s ease;
  }

  .close-sidebar-btn {
    display: none;
  }

  .collapse-btn {
    display: flex;
  }

  /* Collapsed sidebar styles */
  .app-container.sidebar-collapsed .sidebar-content {
    padding: 1.5rem 0.5rem;
    overflow-x: hidden;
  }

  .app-container.sidebar-collapsed .brand-text {
    display: none;
  }

  .app-container.sidebar-collapsed .sidebar-content > div:not(.brand) {
    display: none;
  }

  .app-container.sidebar-collapsed .action-buttons {
    display: none;
  }

  .app-container.sidebar-collapsed .brand {
    justify-content: center;
    margin-bottom: 2rem;
  }

  .app-container.sidebar-collapsed .collapse-btn {
    transform: rotate(180deg);
  }

  .main-content {
    padding: 3rem;
    overflow-y: auto;
    height: 100%;
  }

  .charts-section {
    grid-template-columns: 2fr 1fr;
  }

  .chart-container {
    height: 420px;
  }

  h1 {
    font-size: 2rem;
  }
}

/* Print Styles */
@page {
  size: A4;
  margin: 15mm;
}

@media print {
  html,
  body {
    background: white !important;
    color: black !important;
    width: 210mm;
    height: auto;
    margin: 0;
    padding: 0;
  }

  body {
    display: block;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .app-container {
    display: block;
    box-shadow: none;
    border: none;
    max-width: none;
    height: auto;
    overflow: visible;
  }

  .mobile-header,
  .sidebar,
  .top-controls,
  .action-buttons,
  .accordion,
  .github-link,
  #version-tag,
  .youtube-link,
  .market-rates,
  .footer {
    display: none !important;
  }

  .main-content {
    padding: 0;
    margin: 0;
    height: auto;
    overflow: visible;
    width: 100%;
  }

  .header {
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--primary);
    padding-bottom: 1rem;
  }

  h1 {
    font-size: 2.5rem;
    color: black;
  }

  .summary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10mm;
    margin-bottom: 2rem;
  }

  .card {
    break-inside: avoid;
    border: 1px solid #e2e8f0;
    box-shadow: none;
    padding: 1rem;
    border-radius: 12px;
  }

  .card.highlight {
    background: #f8fafc !important;
    color: black !important;
    border: 2px solid var(--primary);
  }

  .card.highlight .card-label,
  .card.highlight .card-value,
  .card.highlight .card-sub {
    color: black !important;
  }

  .charts-section {
    display: block;
    width: 100%;
  }

  .chart-container {
    break-inside: avoid;
    border: 1px solid #e2e8f0;
    box-shadow: none;
    margin-bottom: 2rem;
    height: 100mm; /* Fixed height for consistent print layout */
    width: 100%;
    page-break-after: auto;
  }

  .table-container {
    break-inside: auto;
    border: none;
    box-shadow: none;
    padding: 0;
    margin-top: 2rem;
  }

  .table-wrapper {
    background: none;
    padding: 0;
  }

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

  th {
    background: #f1f5f9 !important;
    color: black !important;
    border-bottom: 2px solid black;
  }

  td,
  th {
    padding: 8px;
    border-bottom: 1px solid #e2e8f0;
    font-size: 10pt;
  }

  thead {
    display: table-header-group;
  }

  tr {
    break-inside: avoid;
  }

  .table-header button {
    display: none;
  }
}

/* GitHub Link Button */
.github-link {
  position: fixed;
  bottom: 1rem;
  right: 11rem;
  background: rgba(15, 23, 42, 0.8);
  color: white;
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  backdrop-filter: blur(4px);
  z-index: 1000;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  opacity: 0.7;
  transition: all 0.2s;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.github-link:hover {
  opacity: 1;
  background: rgba(15, 23, 42, 0.95);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.github-link svg {
  flex-shrink: 0;
}

[data-theme="dark"] .github-link {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-sub);
  border-color: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .github-link:hover {
  background: rgba(255, 255, 255, 0.15);
  color: var(--text-main);
  border-color: rgba(255, 255, 255, 0.1);
}

/* Version Tag */
#version-tag {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  background: rgba(15, 23, 42, 0.8);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  backdrop-filter: blur(4px);
  z-index: 1000;
  font-family: monospace;
  opacity: 0.7;
  transition: opacity 0.2s;
  pointer-events: none;
  user-select: none;
}

#version-tag:hover {
  opacity: 1;
}

[data-theme="dark"] #version-tag {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-sub);
}

/* YouTube Link */
.youtube-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  margin: 1rem 1.5rem;
  text-decoration: none;
  color: var(--text-sub);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 10px;
  transition: all 0.2s ease;
  border: 1px solid var(--border);
  background: transparent;
}

.youtube-link:hover {
  color: var(--text-main);
  background: var(--surface-hover);
  border-color: var(--text-sub);
}

.youtube-icon {
  width: 18px;
  height: 18px;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.youtube-link:hover .youtube-icon {
  opacity: 1;
}