/* ==========================================================================
   Tungsten Price Tracker PWA - Modern Glassmorphism & Financial Aesthetics
   ========================================================================== */

:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(245, 158, 11, 0.3);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-amber: #f59e0b;
  --accent-amber-glow: rgba(245, 158, 11, 0.25);
  --accent-cyan: #38bdf8;
  --accent-cyan-glow: rgba(56, 189, 248, 0.2);
  
  /* Financial indicators */
  --price-up: #ef4444;      /* Red for price increase */
  --price-up-bg: rgba(239, 68, 68, 0.12);
  --price-down: #10b981;    /* Green for price decrease */
  --price-down-bg: rgba(16, 185, 129, 0.12);
  --price-flat: #94a3b8;
  --price-flat-bg: rgba(148, 163, 184, 0.12);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-main: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(245, 158, 11, 0.15);
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(245, 158, 11, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(56, 189, 248, 0.06) 0%, transparent 40%);
  color: var(--text-primary);
  min-height: 100vh;
  padding-bottom: 80px;
  overflow-x: hidden;
}

/* Typography & Links */
h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
}

/* App Container */
.app-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 16px 20px;
}

/* Header Navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
  box-shadow: var(--shadow-main);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  filter: drop-shadow(0 0 8px var(--accent-amber-glow));
}

.brand-title h1 {
  font-size: 1.25rem;
  background: linear-gradient(135deg, #fff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-title .subtitle {
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.live-tag {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 8px #10b981;
}

.header-actions {
  display: flex;
  gap: 10px;
}

/* Action Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: #000;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.1);
}

.btn-glass {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

/* PWA Banner */
.pwa-banner {
  display: none;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(90deg, rgba(245, 158, 11, 0.15), rgba(56, 189, 248, 0.15));
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  margin-bottom: 24px;
}

.pwa-banner-content {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
}

/* Summary Banner Cards */
.summary-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.summary-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px;
  transition: var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.summary-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--accent-amber);
}

.summary-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-highlight);
}

.summary-card .label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.summary-card .val {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.summary-card .unit {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 400;
  margin-left: 4px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  margin-top: 8px;
}

.badge-up {
  background-color: var(--price-up-bg);
  color: var(--price-up);
}

.badge-down {
  background-color: var(--price-down-bg);
  color: var(--price-down);
}

.badge-flat {
  background-color: var(--price-flat-bg);
  color: var(--price-flat);
}

/* Tabs Navigation */
.tabs-header {
  display: flex;
  gap: 12px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 20px;
  padding-bottom: 8px;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 8px 16px;
  cursor: pointer;
  position: relative;
  transition: var(--transition-fast);
}

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

.tab-btn.active {
  color: var(--accent-amber);
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -9px;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--accent-amber);
  border-radius: var(--radius-full);
}

/* Tab Contents */
.tab-content {
  display: none;
}

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

/* Price Grid */
.price-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 18px;
}

.price-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: var(--transition-fast);
  cursor: pointer;
}

.price-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 14px;
}

.card-category {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  color: var(--accent-cyan);
}

.card-name {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 4px;
}

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

.price-main {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

/* Chart Container */
.chart-section {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.select-wrapper select {
  background: rgba(15, 23, 42, 0.8);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  outline: none;
  font-size: 0.9rem;
  cursor: pointer;
}

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

/* Parser Tool Section */
.parser-section {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.parser-textarea {
  width: 100%;
  height: 140px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  resize: vertical;
  outline: none;
  margin-bottom: 14px;
  transition: var(--transition-fast);
}

.parser-textarea:focus {
  border-color: var(--accent-amber);
  box-shadow: 0 0 0 2px var(--accent-amber-glow);
}

.parser-controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Table Design */
.data-table-container {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

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

.data-table th {
  background: rgba(15, 23, 42, 0.8);
  color: var(--text-muted);
  font-weight: 600;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}

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

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.03);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: rgba(15, 23, 42, 0.95);
  color: var(--text-primary);
  border: 1px solid var(--accent-amber);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-main);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Responsive Mobile Adjustments */
@media (max-width: 768px) {
  .app-container {
    padding: 12px;
  }
  .navbar {
    padding: 14px 16px;
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
  }
  .header-actions {
    justify-content: flex-end;
  }
  .price-grid {
    grid-template-columns: 1fr;
  }
  .chart-wrapper {
    height: 240px;
  }
}