/* ==========================================================================
   CryptoView — Design System & Stylesheet
   Brand Theme: Imran Pollob Portfolio Design Tokens
   ========================================================================== */

:root {
  /* Brand Scale */
  --brand-50: #ecfdfb;
  --brand-100: #ccfbf1;
  --brand-200: #99f6e4;
  --brand-300: #5eead4;
  --brand-400: #2dd4bf;
  --brand-500: #14b8a6;
  --brand-600: #0d9488;
  --brand-700: #0f766e;
  --brand-800: #115e59;
  --brand-900: #134e4a;
  --brand-950: #042f2e;

  /* Semantic - Light Mode */
  --color-primary: #0d9488;
  --color-primary-hover: #0f766e;
  --color-primary-light: rgba(13, 148, 136, 0.12);

  --color-background: #ecfdfb;
  --color-surface: #f8fafc;
  --color-surface-hover: #f1f5f9;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-border: #cbd5e1;
  --color-border-subtle: #e2e8f0;

  /* Status */
  --color-success: #16a34a;
  --color-warning: #f59e0b;
  --color-error: #dc2626;
  --color-info: #0284c7;

  /* Typography */
  --font-family: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'JetBrains Mono', Menlo, monospace;
  --base-font-size: 16px;
  --font-size-nav: 0.875rem;

  /* Typography Scale */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 1.875rem;
  --font-size-3xl: 2.25rem;
  --font-size-4xl: 2.75rem;

  /* Font Weights */
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* Line Heights */
  --line-height-tight: 1.15;
  --line-height-snug: 1.35;
  --line-height-normal: 1.55;
  --line-height-relaxed: 1.7;

  /* Letter Spacing */
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.05em;
  --letter-spacing-widest: 0.12em;

  /* Shared UI */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;
  --spacing-unit: 4px;

  /* Glassmorphism & Shadows */
  --glass-bg: rgba(248, 250, 252, 0.85);
  --glass-border: rgba(203, 213, 225, 0.8);
  --card-bg: #ffffff;
  --card-header-bg: #f8fafc;
  --hover-bg: rgba(13, 148, 136, 0.08);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.1);
  --input-bg: rgba(255, 255, 255, 0.85);
  --scrollbar-track: #e2e8f0;
  --scrollbar-thumb: #cbd5e1;
}

/* Dark Mode Tokens */
[data-theme="dark"] {
  --color-primary: #14b8a6;
  --color-primary-hover: #2dd4bf;
  --color-primary-light: rgba(20, 184, 166, 0.14);

  --color-background: #071311;
  --color-surface: #0d1f1c;
  --color-surface-hover: #132a26;
  --color-text: #f0fdfa;
  --color-text-muted: #94a3b8;
  --color-border: #1f3a35;
  --color-border-subtle: #172c28;

  --color-success: #4ade80;
  --color-warning: #fbbf24;
  --color-error: #f87171;
  --color-info: #38bdf8;

  --glass-bg: rgba(13, 31, 28, 0.85);
  --glass-border: rgba(31, 58, 53, 0.8);
  --card-bg: #0b1916;
  --card-header-bg: #0e221f;
  --hover-bg: rgba(20, 184, 166, 0.12);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.45);
  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.55);
  --input-bg: rgba(7, 19, 17, 0.85);
  --scrollbar-track: #071311;
  --scrollbar-thumb: #1f3a35;
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  font-size: var(--base-font-size);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  flex: 1;
}

/* ==========================================================================
   Control Panel / Header
   ========================================================================== */

.control-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.75rem;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  gap: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-shrink: 0;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}

.brand-logo {
  width: 34px;
  height: 34px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.logo-link:hover .brand-logo {
  transform: scale(1.05);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-heading);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text);
  line-height: var(--line-height-tight);
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(20, 184, 166, 0.25);
  margin-left: 0.25rem;
}

.live-badge .status-dot {
  width: 6px;
  height: 6px;
  background-color: var(--color-success);
  border-radius: 50%;
  animation: pulse-dot 1.8s infinite ease-in-out;
}

@keyframes pulse-dot {
  0% {
    transform: scale(0.9);
    opacity: 0.8;
  }

  50% {
    transform: scale(1.3);
    opacity: 1;
    box-shadow: 0 0 6px var(--color-success);
  }

  100% {
    transform: scale(0.9);
    opacity: 0.8;
  }
}

/* ==========================================================================
   Search Container
   ========================================================================== */

.header-center {
  flex: 1;
  max-width: 480px;
  min-width: 220px;
}

.search-container {
  position: relative;
  width: 100%;
}

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

.search-icon {
  position: absolute;
  left: 0.95rem;
  color: var(--color-text-muted);
  pointer-events: none;
  transition: color 0.2s ease;
}

input#coin-search {
  width: 100%;
  padding: 0.65rem 2.5rem 0.65rem 2.6rem;
  background-color: var(--input-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-regular);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

input#coin-search:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

input#coin-search:focus+.search-icon {
  color: var(--color-primary);
}

.keyboard-hint {
  position: absolute;
  right: 0.75rem;
  display: flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
  pointer-events: none;
}

/* Search Dropdown Results */
.search-results {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background-color: var(--card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  list-style: none;
  padding: 0.35rem 0;
  margin: 0;
  max-height: 320px;
  overflow-y: auto;
  box-shadow: var(--shadow-md);
  display: none;
  z-index: 1100;
}

.search-results li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1rem;
  cursor: pointer;
  border-bottom: 1px solid var(--color-border-subtle);
  transition: background-color 0.15s ease, color 0.15s ease;
  font-size: var(--font-size-sm);
}

.search-results li:last-child {
  border-bottom: none;
}

.search-results li:hover,
.search-results li.active {
  background-color: var(--hover-bg);
  color: var(--color-primary);
}

.search-results .coin-badge {
  font-family: var(--font-mono);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-xs);
  background: var(--color-primary-light);
  color: var(--color-primary);
  padding: 0.2rem 0.45rem;
  border-radius: 4px;
}

/* ==========================================================================
   Header Right Controls (Layout Selector, Theme, Repo Link)
   ========================================================================== */

.header-right {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-shrink: 0;
}

/* Non-Mobile Grid Layout Dropdown Button */
.layout-control {
  position: relative;
}

.grid-dropdown-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--color-primary);
  color: #ffffff;
  border: 1px solid var(--color-primary);
  font-family: var(--font-family);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
  height: 36px;
  box-shadow: 0 2px 8px rgba(13, 148, 136, 0.28);
}

.grid-dropdown-btn:hover,
.layout-control.is-open .grid-dropdown-btn {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: 0 4px 12px rgba(13, 148, 136, 0.4);
  transform: translateY(-1px);
}

.grid-dropdown-btn .chevron-icon {
  color: rgba(255, 255, 255, 0.85);
}

.layout-control.is-open .chevron-icon {
  transform: rotate(180deg);
}

.grid-badge {
  font-family: var(--font-mono);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xs);
  background: rgba(255, 255, 255, 0.25);
  color: #ffffff;
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  min-width: 18px;
  text-align: center;
}

/* Grid Dropdown Menu */
.grid-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  width: 160px;
  background-color: var(--card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 0.35rem 0;
  display: none;
  flex-direction: column;
  z-index: 1200;
  animation: fadeIn 0.15s ease;
}

.layout-control.is-open .grid-menu {
  display: flex;
}

.grid-item {
  padding: 0.55rem 0.95rem;
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.grid-item:hover {
  background-color: var(--hover-bg);
  color: var(--color-primary);
}

.grid-item.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

/* ==========================================================================
   Time Interval Selector Button & Dropdown Menu
   ========================================================================== */

.interval-control {
  position: relative;
}

.interval-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-family);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
  height: 36px;
}

.interval-btn:hover,
.interval-control.is-open .interval-btn {
  border-color: var(--color-primary);
  background: var(--hover-bg);
}

.interval-label {
  color: var(--color-text-muted);
}

.interval-badge {
  font-family: var(--font-mono);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
}

.chevron-icon {
  color: var(--color-text-muted);
  transition: transform 0.2s ease;
}

.interval-control.is-open .chevron-icon {
  transform: rotate(180deg);
}

/* Interval Dropdown Menu */
.interval-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  width: 170px;
  background-color: var(--card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 0.35rem 0;
  display: none;
  flex-direction: column;
  z-index: 1200;
  animation: fadeIn 0.15s ease;
  max-height: 420px;
  overflow-y: auto;
}

.interval-control.is-open .interval-menu {
  display: flex;
}

/* Section headers (MINUTES, HOURS, DAYS) */
.interval-section-header {
  padding: 0.55rem 0.85rem 0.25rem 0.85rem;
  font-size: 0.68rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.interval-item {
  padding: 0.5rem 0.85rem;
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.interval-item:hover {
  background-color: var(--hover-bg);
  color: var(--color-primary);
}

.interval-item.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

/* Action Icon Buttons (Theme toggle, GitHub link) */
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.icon-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--hover-bg);
  transform: translateY(-1px);
}

.icon-btn svg {
  width: 18px;
  height: 18px;
}

/* Loading Indicator */
.loading {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading.hidden {
  display: none;
}

/* ==========================================================================
   Selected Tags Area
   ========================================================================== */

.tags-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.75rem;
  gap: 1rem;
  border-bottom: 1px solid var(--color-border-subtle);
  background: var(--color-surface);
}

.tags-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
}

.tag {
  background: var(--card-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
  animation: fadeIn 0.25s ease forwards;
}

.tag:hover {
  border-color: var(--color-primary);
  background: var(--hover-bg);
}

.remove-tag {
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  color: var(--color-text-muted);
  transition: color 0.15s ease, transform 0.15s ease;
  display: inline-flex;
  align-items: center;
}

.remove-tag:hover {
  color: var(--color-error);
  transform: scale(1.15);
}

.clear-all-btn {
  background: transparent;
  border: none;
  font-family: var(--font-family);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

.clear-all-btn:hover {
  color: var(--color-error);
  background: rgba(220, 38, 38, 0.08);
}

/* ==========================================================================
   Charts Grid
   ========================================================================== */

.charts-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  /* Default 2 columns */
  gap: 1.25rem;
  padding: 1.25rem 1.75rem 2rem 1.75rem;
  width: 100%;
  flex: 1;
}

/* Dynamic columns applied via data-cols attribute (1 to 8) */
.charts-grid[data-cols="1"] {
  grid-template-columns: 1fr;
}

.charts-grid[data-cols="2"] {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.charts-grid[data-cols="3"] {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.charts-grid[data-cols="4"] {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.charts-grid[data-cols="5"] {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.charts-grid[data-cols="6"] {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.charts-grid[data-cols="7"] {
  grid-template-columns: repeat(7, minmax(0, 1fr));
}

.charts-grid[data-cols="8"] {
  grid-template-columns: repeat(8, minmax(0, 1fr));
}

/* Card height adaptations for dense grids */
.charts-grid[data-cols="1"] .chart-wrapper {
  height: 640px;
}

.charts-grid[data-cols="2"] .chart-wrapper {
  height: 560px;
}

.charts-grid[data-cols="3"] .chart-wrapper,
.charts-grid[data-cols="4"] .chart-wrapper {
  height: 520px;
}

.charts-grid[data-cols="5"] .chart-wrapper,
.charts-grid[data-cols="6"] .chart-wrapper,
.charts-grid[data-cols="7"] .chart-wrapper,
.charts-grid[data-cols="8"] .chart-wrapper {
  height: 440px;
  min-height: 380px;
}

/* Responsive fallbacks for wide desktop */
@media (max-width: 1400px) {

  .charts-grid[data-cols="8"],
  .charts-grid[data-cols="7"],
  .charts-grid[data-cols="6"] {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 1100px) {

  .charts-grid[data-cols="5"],
  .charts-grid[data-cols="4"],
  .charts-grid[data-cols="3"] {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* Chart Card / Wrapper */
.chart-wrapper {
  background-color: var(--card-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  position: relative;
  min-height: 540px;
  height: 560px;
  display: flex;
  flex-direction: column;
  animation: slideUp 0.35s ease forwards;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.chart-wrapper:hover {
  border-color: rgba(20, 184, 166, 0.45);
}

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1rem;
  background: var(--card-header-bg);
  border-bottom: 1px solid var(--color-border-subtle);
}

.chart-pair-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.chart-pair-name {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-wide);
}

.chart-timeframe {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
}

.chart-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.chart-close-btn {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-size: 1.25rem;
  line-height: 1;
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.chart-close-btn:hover {
  color: var(--color-error);
  background: rgba(220, 38, 38, 0.1);
}

.tradingview-widget-container {
  flex: 1;
  width: 100%;
  height: 100%;
}

/* ==========================================================================
   Empty State
   ========================================================================== */

.empty-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  text-align: center;
  background: var(--card-bg);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  margin: 2rem 0;
}

.empty-icon {
  width: 56px;
  height: 56px;
  color: var(--color-primary);
  margin-bottom: 1rem;
  opacity: 0.85;
}

.empty-title {
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin: 0 0 0.5rem 0;
}

.empty-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  max-width: 420px;
  margin: 0 0 1.5rem 0;
}

.quick-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.preset-chip {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.15s ease;
}

.preset-chip:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
  transform: translateY(-1px);
}

/* ==========================================================================
   Footer (Professional & SEO Friendly)
   ========================================================================== */

.app-footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  padding: 1.25rem 1.75rem;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  max-width: 1400px;
  margin: 0 auto;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: var(--font-weight-medium);
}

.footer-logo {
  border-radius: 4px;
}

.footer-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.footer-meta a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: var(--font-weight-semibold);
  transition: color 0.15s ease;
}

.footer-meta a:hover {
  text-decoration: underline;
  color: var(--color-primary-hover);
}

/* ==========================================================================
   Animations & Scrollbar
   ========================================================================== */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}

/* ==========================================================================
   Mobile Responsiveness (Crucial Layout Behavior)
   ========================================================================== */

@media (max-width: 768px) {
  .control-panel {
    flex-wrap: wrap;
    padding: 0.85rem 1rem;
    gap: 0.75rem;
  }

  .header-left {
    order: 1;
    gap: 0.5rem;
  }

  .header-right {
    order: 2;
    gap: 0.5rem;
  }

  .header-center {
    order: 3;
    width: 100%;
    max-width: none;
  }

  .keyboard-hint {
    display: none;
  }

  /* BUTTON VISIBILITY SPEC: HIDE ROW-LAYOUT BUTTON ON MOBILE */
  .layout-control {
    display: none !important;
  }

  /* FORCED SINGLE COLUMN ON MOBILE FOR ALL GRID MODES (1 to 8) */
  .charts-grid,
  .charts-grid[data-cols="1"],
  .charts-grid[data-cols="2"],
  .charts-grid[data-cols="3"],
  .charts-grid[data-cols="4"],
  .charts-grid[data-cols="5"],
  .charts-grid[data-cols="6"],
  .charts-grid[data-cols="7"],
  .charts-grid[data-cols="8"] {
    grid-template-columns: 1fr !important;
    padding: 1rem;
    gap: 1rem;
  }

  .chart-wrapper {
    min-height: 480px;
    height: 500px;
  }

  .tags-bar {
    padding: 0.65rem 1rem;
  }

  .footer-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}