/* 
  bitcoins.express Premium Design System 
  Author: Antigravity
  Theme: Dark Mode First, Glassmorphism, Bitcoin Accent
*/

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Colors */
  --bg-color: #07090e;
  --card-bg: rgba(18, 22, 33, 0.7);
  --card-border: rgba(247, 147, 26, 0.15);
  --card-hover-border: rgba(247, 147, 26, 0.4);
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --btc-orange: #f7931a;
  --btc-orange-hover: #e07f0d;
  --btc-orange-glow: rgba(247, 147, 26, 0.25);
  
  --green-up: #10b981;
  --green-glow: rgba(16, 185, 129, 0.2);
  --red-down: #ef4444;
  --red-glow: rgba(239, 68, 68, 0.2);
  
  --sidebar-w: 320px;
  --header-h: 70px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-color: #f8fafc;
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-border: rgba(0, 0, 0, 0.08);
  --card-hover-border: rgba(247, 147, 26, 0.5);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --btc-orange-glow: rgba(247, 147, 26, 0.15);
}

/* Base resets */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-body);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* Scroll progress */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--btc-orange), #ffbe5c);
  z-index: 1000;
  width: 0%;
  transition: width 0.1s ease;
}

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

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(var(--bg-color), 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  transition: background 0.3s ease, border-bottom 0.3s ease;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: inherit;
}

.logo-icon {
  font-size: 1.8rem;
  color: var(--btc-orange);
  filter: drop-shadow(0 0 8px var(--btc-orange-glow));
  animation: pulse-glow 3s infinite ease-in-out;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--btc-orange) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-tagline {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

@media (max-width: 1150px) {
  .header-tagline {
    display: none;
  }
}

/* Navigation Menu */
.nav-menu {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0 1rem;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.nav-link:hover {
  color: var(--btc-orange);
  background: rgba(247, 147, 26, 0.05);
}

.nav-link.active {
  color: var(--btc-orange);
  background: var(--btc-orange-glow);
  border: 1px solid var(--card-border);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle, .lang-toggle {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.theme-toggle:hover, .lang-toggle:hover {
  border-color: var(--btc-orange);
  box-shadow: 0 0 8px var(--btc-orange-glow);
  transform: translateY(-2px);
}

.lang-toggle {
  font-weight: 600;
  font-size: 0.85rem;
  font-family: var(--font-display);
  border-radius: 8px;
  width: auto;
  padding: 0 0.75rem;
}

/* Dashboard grid */
.main-content {
  flex: 1;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 2rem 3rem;
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2rem;
}

@media (max-width: 1024px) {
  .main-content {
    grid-template-columns: 1fr;
  }
  header {
    padding: 0 1rem;
  }
  .nav-menu {
    gap: 0.5rem;
  }
  .nav-link {
    font-size: 0.85rem;
    padding: 0.4rem 0.5rem;
  }
}

/* Ticker Bar */
.ticker-bar {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.ticker-card {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.ticker-card:hover {
  border-color: var(--card-hover-border);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.ticker-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}

.ticker-value {
  font-size: 1.35rem;
  font-weight: 700;
  font-family: var(--font-display);
}

.ticker-change {
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 0.2rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.ticker-change.up { color: var(--green-up); }
.ticker-change.down { color: var(--red-down); }

/* Left Layout (Dashboard Blocks) */
.dashboard-grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Tab Switching visibility rules */
.tab-section {
  display: none;
}

.tab-section.active {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Card base */
.widget-card {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 2rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.widget-card:hover {
  border-color: var(--card-hover-border);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.widget-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 0.75rem;
}

.widget-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.35rem;
}

.widget-title i {
  color: var(--btc-orange);
}

/* DCA Calculator layout */
.dca-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 768px) {
  .dca-grid {
    grid-template-columns: 1fr;
  }
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.input-group label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

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

.input-prefix {
  position: absolute;
  left: 1rem;
  color: var(--text-muted);
  font-weight: 600;
}

.input-field {
  width: 100%;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  padding: 0.75rem 1rem 0.75rem 2.2rem;
  border-radius: 8px;
  font-size: 1rem;
  font-family: var(--font-body);
  transition: all 0.2s ease;
}

.input-field:focus {
  outline: none;
  border-color: var(--btc-orange);
  box-shadow: 0 0 0 3px var(--btc-orange-glow);
}

.select-field {
  padding-left: 1rem;
}

/* Range input styling */
.slider-container {
  margin-top: 0.5rem;
}

.range-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--card-border);
  outline: none;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--btc-orange);
  cursor: pointer;
  box-shadow: 0 0 10px var(--btc-orange-glow);
  transition: transform 0.1s ease;
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.25);
}

/* Results panel */
.results-panel {
  background: rgba(247, 147, 26, 0.03);
  border: 1px dashed rgba(247, 147, 26, 0.25);
  border-radius: 12px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--card-border);
}

.result-row:last-child {
  border-bottom: none;
}

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

.result-value {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
}

.result-value.highlight {
  color: var(--btc-orange);
  font-size: 1.4rem;
}

.profit-badge {
  background: var(--green-glow);
  color: var(--green-up);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* Chart widget */
.chart-container {
  height: 320px;
  width: 100%;
  position: relative;
  margin-top: 1rem;
}

/* Halving countdown styles */
.countdown-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  text-align: center;
}

.countdown-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 1rem;
}

.countdown-time {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--btc-orange);
}

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

/* Satoshi Converter grid */
.sat-converter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.sat-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: all 0.2s ease;
}

.sat-card:hover {
  border-color: var(--btc-orange);
  transform: translateY(-2px);
}

.sat-amount {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}

.sat-fiat {
  color: var(--btc-orange);
  font-size: 1.15rem;
  font-weight: 600;
}

/* Documentation Styles */
.docs-card {
  margin-bottom: 2rem;
}

.docs-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 1rem;
}

.docs-step {
  display: flex;
  gap: 1.5rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--card-border);
  padding: 1.5rem;
  border-radius: 12px;
  align-items: flex-start;
  transition: all 0.2s ease;
}

.docs-step:hover {
  border-color: var(--btc-orange);
}

.docs-step-num {
  background: var(--btc-orange);
  color: #07090e;
  font-family: var(--font-display);
  font-weight: 700;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 0 10px var(--btc-orange-glow);
}

.docs-step-content {
  flex: 1;
}

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

.docs-code-box {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 1rem;
  font-family: monospace;
  font-size: 0.85rem;
  color: var(--text-primary);
  margin-top: 0.75rem;
  position: relative;
  overflow-x: auto;
}

.docs-code-box button {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.75rem;
  transition: all 0.2s ease;
}

.docs-code-box button:hover {
  color: var(--btc-orange);
  border-color: var(--btc-orange);
}

.api-endpoint {
  display: inline-block;
  background: var(--btc-orange-glow);
  color: var(--btc-orange);
  border: 1px solid var(--card-border);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

/* Sidebar elements */
.sidebar-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Affiliate Marketing Slots (wow factors) */
.affiliate-card {
  background: linear-gradient(135deg, rgba(20, 26, 36, 0.9) 0%, rgba(10, 12, 18, 0.95) 100%);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: all 0.3s ease;
}

.affiliate-card:hover {
  border-color: var(--btc-orange);
  box-shadow: 0 10px 25px rgba(247, 147, 26, 0.15);
  transform: translateY(-4px);
}

.affiliate-badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: rgba(247, 147, 26, 0.1);
  border: 1px solid rgba(247, 147, 26, 0.3);
  color: var(--btc-orange);
  font-size: 0.65rem;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.affiliate-logo {
  font-size: 2rem;
  color: var(--btc-orange);
}

.affiliate-title {
  font-size: 1.15rem;
  font-weight: 700;
}

.affiliate-description {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.affiliate-btn {
  background: var(--btc-orange);
  color: #07090e;
  border: none;
  padding: 0.75rem;
  border-radius: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  transition: all 0.2s ease;
}

.affiliate-btn:hover {
  background: var(--btc-orange-hover);
  box-shadow: 0 0 12px var(--btc-orange-glow);
}

.affiliate-btn-secondary {
  background: transparent;
  border: 1px solid var(--btc-orange);
  color: var(--btc-orange);
}

.affiliate-btn-secondary:hover {
  background: var(--btc-orange-glow);
}

/* Premium newsletter card */
.newsletter-card {
  background: radial-gradient(circle at 100% 0%, rgba(247, 147, 26, 0.1) 0%, rgba(0,0,0,0) 70%), var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 1.5rem;
}

.newsletter-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}

.newsletter-btn {
  background: var(--text-primary);
  color: var(--bg-color);
  border: none;
  padding: 0.75rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-display);
  transition: all 0.2s ease;
}

.newsletter-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* Footer styling */
footer {
  border-top: 1px solid var(--card-border);
  background: rgba(10, 12, 18, 0.5);
  padding: 2.5rem 2rem;
  margin-top: 4rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--btc-orange);
}

.footer-text {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Animations */
@keyframes pulse-glow {
  0%, 100% {
    transform: scale(1);
    filter: drop-shadow(0 0 5px var(--btc-orange-glow));
  }
  50% {
    transform: scale(1.05);
    filter: drop-shadow(0 0 15px rgba(247, 147, 26, 0.55));
  }
}

/* Live ticker sparkline canvas styling */
.sparkline-canvas {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 40px;
  pointer-events: none;
  opacity: 0.4;
}

/* Modal setup */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}

.modal-content {
  background: #10141d;
  border: 1px solid var(--btc-orange);
  padding: 2rem;
  border-radius: 16px;
  max-width: 400px;
  width: 90%;
  text-align: center;
  box-shadow: 0 0 30px var(--btc-orange-glow);
}

.modal-btn {
  margin-top: 1.5rem;
  padding: 0.6rem 1.5rem;
  background: var(--btc-orange);
  color: #000;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
}

.modal-btn:hover {
  background: var(--btc-orange-hover);
}