@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ==========================================================================
   DESIGN SYSTEM: Dark, Premium SaaS Developer-Dashboard Aesthetic
   Primary Accent: #21D0CA
   ========================================================================== */

:root {
  /* Surface Hierarchy */
  --bg-page: #090d12;
  --bg-nav: #0d1219;
  --bg-surface: #111822;
  --bg-surface-hover: #151e2a;
  --bg-nested: #0b0f15;
  
  /* Borders - Subtle, low-contrast 1px */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-subtle-hover: rgba(255, 255, 255, 0.14);
  --border-focus: #21d0ca;

  /* Primary Accent - #21D0CA (Restrained usage) */
  --primary: #21d0ca;
  --primary-hover: #1bb7b2;
  --primary-active: #169f9a;
  --primary-subtle: rgba(33, 208, 202, 0.10);
  --primary-border: rgba(33, 208, 202, 0.25);

  /* Status */
  --status-online: #10b981;
  --status-online-subtle: rgba(16, 185, 129, 0.12);

  /* Typography Colors */
  --text-primary: #f0f6fc;
  --text-secondary: #8b949e;
  --text-muted: #57606a;

  /* Fonts */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-heading: var(--font-sans);

  /* Radii - Medium/small rounded corners, not overly rounded */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 10px;

  /* Shadows - Minimal & restrained */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.45);
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-page);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

/* ==========================================================================
   Navigation Bar (Surface 2: Slightly lighter than page)
   ========================================================================== */

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-nav);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-logo-img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.brand-name {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.2px;
  color: var(--text-primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: color 0.15s ease;
  position: relative;
  padding: 6px 0;
}

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

.nav-link.active {
  color: var(--text-primary);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -13px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.social-icon-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.15s ease;
}

.social-icon-btn:hover {
  border-color: var(--border-subtle-hover);
  color: var(--text-primary);
  background: var(--bg-surface-hover);
}

.social-icon-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

/* ==========================================================================
   Buttons & Controls (Compact & Functional)
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
  line-height: 1.4;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--primary);
  color: #090d12;
  border-color: var(--primary);
}

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

.btn-glass {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.btn-glass:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-subtle-hover);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

/* ==========================================================================
   Hero Section & Structured Dashboard
   ========================================================================== */

.hero-section {
  padding: 48px 0 36px;
  border-bottom: 1px solid var(--border-subtle);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
}

.hero-content {
  text-align: left;
}

/* User Trust Pill - Compact developer badge */
.trust-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 4px 10px 4px 4px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}

.avatar-stack {
  display: flex;
  align-items: center;
}

.avatar-stack img {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1.5px solid var(--bg-surface);
  margin-left: -6px;
  object-fit: cover;
}

.avatar-stack img:first-child {
  margin-left: 0;
}

.trust-text {
  font-size: 12px;
  color: var(--text-secondary);
}

.trust-text strong {
  color: var(--text-primary);
  font-weight: 600;
}

.hero-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.8px;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.hero-subtitle {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 24px;
  max-width: 480px;
}

.hero-btn-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Dashboard Metric Cards Grid (Right side of Hero) */
.hero-visual {
  display: flex;
  justify-content: flex-end;
}

.hero-stats-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  width: 100%;
}

.stat-col {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px 18px;
  text-align: left;
  transition: border-color 0.15s ease;
}

.stat-col:hover {
  border-color: var(--border-subtle-hover);
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  margin-bottom: 4px;
}

.stat-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

/* Hide legacy decorative bars */
.hero-equalizer-wrap {
  display: none;
}

/* ==========================================================================
   Section Layouts & Metadata Labels
   ========================================================================== */

.section-wrap {
  padding: 60px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.section-tagline {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  margin-bottom: 8px;
  display: inline-block;
}

.section-heading {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.section-subtext {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

/* ==========================================================================
   How It Works (Clean 4-Card Grid & Sub-features)
   ========================================================================== */

.how-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.how-step-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px 18px;
  text-align: left;
  transition: border-color 0.15s ease;
}

.how-step-card:hover {
  border-color: var(--border-subtle-hover);
}

.how-step-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-subtle);
  border: 1px solid var(--primary-border);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  display: inline-block;
  margin-bottom: 14px;
  letter-spacing: 0.05em;
}

.how-step-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: -0.2px;
}

.how-step-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.55;
}

.how-features-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
  text-align: left;
}

.how-feat-col h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.double-check {
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}

.how-feat-col p {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   Features Section (Structured 6-Card Dashboard Grid)
   ========================================================================== */

.features-header-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 28px;
}

.features-grid-6 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature-item-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  text-align: left;
  transition: border-color 0.15s ease;
}

.feature-item-card:hover {
  border-color: var(--border-subtle-hover);
}

.feature-card-icon {
  font-size: 18px;
  margin-bottom: 12px;
}

.feature-item-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
  letter-spacing: -0.2px;
}

.feature-item-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ==========================================================================
   Supported Coins Section (Minimal, Clean Horizontal Row)
   ========================================================================== */

.coins-section {
  padding: 44px 0 48px;
  border-bottom: 1px solid var(--border-subtle);
}

.coins-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.coins-row {
  display: flex !important;
  flex-direction: row !important;
  justify-content: center !important;
  align-items: center !important;
  gap: 56px !important;
  margin-bottom: 20px;
}

.coin-entry {
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
  gap: 10px;
  cursor: default;
  transition: transform 0.15s ease;
}

.coin-entry:hover {
  transform: translateY(-2px);
}

.coin-entry-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  object-fit: contain;
  display: block;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
}

.coin-entry-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.2px;
}

.coins-more {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* ==========================================================================
   FAQ Section (Compact Collapsible Panels)
   ========================================================================== */

.faq-header-wrap {
  margin-bottom: 24px;
}

.faq-accordion-list {
  max-width: 800px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.faq-pill-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.15s ease;
}

.faq-pill-item:hover {
  border-color: var(--border-subtle-hover);
}

.faq-pill-btn {
  width: 100%;
  background: transparent;
  border: none;
  padding: 14px 18px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  text-align: left;
}

.faq-plus-icon {
  color: var(--text-secondary);
  font-size: 18px;
  font-weight: 400;
  line-height: 1;
  transition: transform 0.2s ease, color 0.15s ease;
}

.faq-pill-item.active .faq-plus-icon {
  transform: rotate(45deg);
  color: var(--primary);
}

.faq-answer-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s cubic-bezier(0.4, 0, 0.2, 1), padding 0.2s ease;
  padding: 0 18px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.faq-pill-item.active .faq-answer-body {
  max-height: 250px;
  padding: 0 18px 16px;
}

/* ==========================================================================
   Footer (Surface 2: Compact & Clean)
   ========================================================================== */

.footer {
  background: var(--bg-nav);
  padding: 24px 0;
  border-top: 1px solid var(--border-subtle);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copy {
  font-size: 12px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-size: 12px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--text-primary);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hero-visual {
    justify-content: flex-start;
  }
  .how-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .how-features-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid-6 {
    grid-template-columns: repeat(2, 1fr);
  }
  .nav-menu {
    display: none;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 28px;
  }
  .hero-stats-strip {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
  .stat-number {
    font-size: 22px;
  }
  .how-cards-grid {
    grid-template-columns: 1fr;
  }
  .how-features-row {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .features-grid-6 {
    grid-template-columns: 1fr;
  }
  .coins-row {
    gap: 36px !important;
  }
  .coin-entry-icon {
    width: 46px;
    height: 46px;
  }
  .features-header-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}