/* ==========================================================================
   COINVIEW - Primary Stylesheet
   Designed with restrained financial aesthetics
   ========================================================================== */

:root {
  /* Color Palette - Dark Mode (Default) */
  --bg-color: #111315;
  --surface-color: #181B1F;
  --surface-secondary: #1F2328;
  --text-primary: #F1F3F5;
  --text-secondary: #A6ADB5;
  --text-muted: #727A85;
  --border-color: #292E34;
  --primary-accent: #4F7CFF;
  
  /* Market Color Signals */
  --positive: #2FB673;
  --negative: #E05D5D;
  
  /* Typography Variables */
  --font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-fa: 'Vazirmatn', system-ui, sans-serif;
  
  /* Layout */
  --max-width: 1200px;
  --header-height: 60px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --transition-speed: 0.15s;
}

[data-theme="light"] {
  /* Color Palette - Light Mode */
  --bg-color: #F4F3EF;
  --surface-color: #FAF9F6;
  --surface-secondary: #ECEBE6;
  --text-primary: #181A1D;
  --text-secondary: #626870;
  --text-muted: #8C929C;
  --border-color: #D9D8D2;
  --primary-accent: #315FE8;
  
  --positive: #1E9E5E;
  --negative: #D04545;
}

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

html {
  font-size: 15px;
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-family);
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  line-height: 1.5;
  background-color: var(--bg-color);
  color: var(--text-primary);
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

[dir="rtl"] {
  font-family: var(--font-fa), var(--font-family);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
}

/* Accessibility Focus States */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--primary-accent);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Utility Classes */
.hidden { display: none !important; }
.positive { color: var(--positive) !important; }
.negative { color: var(--negative) !important; }
.muted { color: var(--text-muted) !important; }

/* Header Component */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: var(--bg-color);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition-speed) ease;
  padding: 0.25rem 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

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

.search-box input {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  width: 180px;
  transition: border-color var(--transition-speed) ease, width var(--transition-speed) ease;
}

.search-box input:focus {
  border-color: var(--primary-accent);
  width: 220px;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--surface-color);
  color: var(--text-secondary);
  transition: all var(--transition-speed) ease;
}

.btn-icon:hover {
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.btn-text {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--surface-color);
  color: var(--text-secondary);
}

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

/* Page Title & Status Header */
.main-content {
  padding-top: 2rem;
  padding-bottom: 3rem;
}

.page-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

.status-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.status-indicator {
  color: var(--positive);
  font-size: 0.6rem;
}

/* Stats Cards Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.stat-value {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* Filtering & Controls */
.market-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  gap: 1rem;
}

.filter-tabs {
  display: flex;
  gap: 0.5rem;
}

.filter-btn {
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  transition: all var(--transition-speed) ease;
}

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

.filter-btn.active {
  background-color: var(--surface-secondary);
  color: var(--text-primary);
  border-color: var(--text-muted);
  font-weight: 500;
}

.select-input {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.select-input:hover {
  color: var(--text-primary);
}

/* Table Design */
.table-container {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.market-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

[dir="rtl"] .market-table {
  text-align: right;
}

.market-table th,
.market-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

.market-table th {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
  background-color: var(--surface-secondary);
}

.market-table tbody tr {
  transition: background-color var(--transition-speed) ease;
  cursor: pointer;
}

.market-table tbody tr:hover {
  background-color: var(--surface-secondary);
}

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

/* Table Cells Specific Alignment */
.th-watch, .td-watch { width: 40px; text-align: center; }
.th-rank, .td-rank { width: 50px; color: var(--text-muted); font-size: 0.8rem; }
.th-price, .td-price,
.th-change, .td-change,
.th-cap, .td-cap,
.th-vol, .td-vol { text-align: right; }

[dir="rtl"] .th-price, [dir="rtl"] .td-price,
[dir="rtl"] .th-change, [dir="rtl"] .td-change,
[dir="rtl"] .th-cap, [dir="rtl"] .td-cap,
[dir="rtl"] .th-vol, [dir="rtl"] .td-vol { text-align: left; }

.coin-cell {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.coin-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--surface-secondary);
}

.coin-symbol {
  text-transform: uppercase;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: 0.4rem;
}

[dir="rtl"] .coin-symbol {
  margin-left: 0;
  margin-right: 0.4rem;
}

.btn-star {
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1;
  transition: color var(--transition-speed) ease;
}

.btn-star:hover, .btn-star.active {
  color: #F59E0B;
}

/* Feedback Block (Empty & Errors) */
.feedback-block {
  padding: 3rem 1rem;
  text-align: center;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-top: 1rem;
}

.feedback-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feedback-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.btn-primary {
  background-color: var(--primary-accent);
  color: #FFF;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  transition: opacity var(--transition-speed) ease;
}

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

/* Skeleton Loading Animation */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--surface-color) 25%,
    var(--surface-secondary) 50%,
    var(--surface-color) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-wave 1.5s infinite;
  border-radius: var(--radius-sm);
  display: inline-block;
  height: 1em;
}

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

/* Mobile List Cards (Hidden on Desktop) */
.mobile-card-list {
  display: none;
  flex-direction: column;
  gap: 0.75rem;
}

.coin-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.card-header, .card-body {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Coin Details View Page */
.back-navigation {
  margin-bottom: 1.5rem;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

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

.detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.detail-title-group {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.detail-title {
  font-size: 2rem;
  font-weight: 700;
}

.detail-price-group {
  text-align: right;
}

[dir="rtl"] .detail-price-group {
  text-align: left;
}

.detail-price {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.1;
}

.detail-change {
  font-size: 1rem;
  font-weight: 600;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

/* Chart Container */
.chart-section {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

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

.chart-title {
  font-size: 1rem;
  font-weight: 600;
}

.timeframe-selector {
  display: flex;
  gap: 0.25rem;
}

.tf-btn {
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  border: 1px solid transparent;
}

.tf-btn.active {
  background-color: var(--surface-secondary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.chart-wrapper {
  position: relative;
  height: 320px;
  width: 100%;
}

.about-coin-section {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.about-coin-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.about-coin-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Personal Portfolio Footer Section */
.about-section {
  margin-top: 4rem;
  padding: 2rem;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
}

.about-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.about-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 1rem auto;
}

.about-author {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer {
  padding-top: 2rem;
  padding-bottom: 2rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

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

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-bottom {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}