/* ==========================================================================
   QRPulse API - Modern B2B SaaS Landing Page Stylesheet
   Theme: Dark (#090e18), Emerald (#10b981), Neon Cyan (#06b6d4)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&family=Fira+Code:wght@400;500;600&display=swap');

:root {
  --bg-dark: #090e18;
  --bg-card: rgba(15, 23, 42, 0.7);
  --bg-card-hover: rgba(30, 41, 59, 0.8);
  --bg-input: rgba(15, 23, 42, 0.9);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #10b981;
  
  --emerald: #10b981;
  --emerald-glow: rgba(16, 185, 129, 0.25);
  --emerald-hover: #059669;
  
  --cyan: #06b6d4;
  --cyan-glow: rgba(6, 182, 212, 0.25);
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Fira Code', monospace;
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-glow: 0 0 30px rgba(16, 185, 129, 0.15);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Background Gradients & Effects */
.bg-glow-top {
  position: absolute;
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 500px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, rgba(6, 182, 212, 0.1) 40%, transparent 70%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.bg-glow-mid {
  position: absolute;
  top: 40%;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.12) 0%, rgba(16, 185, 129, 0.05) 50%, transparent 70%);
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

/* Typography Helpers */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--text-main);
  line-height: 1.2;
}

.gradient-text {
  background: linear-gradient(135deg, #ffffff 0%, #a7f3d0 50%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-emerald {
  background: linear-gradient(135deg, var(--emerald) 0%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Header / Navbar */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(9, 14, 24, 0.8);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--text-main);
  text-decoration: none;
}

.logo-badge {
  background: linear-gradient(135deg, var(--emerald), var(--cyan));
  color: #090e18;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--emerald) 0%, #059669 100%);
  color: #090e18;
  font-weight: 700;
  box-shadow: 0 4px 20px var(--emerald-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(16, 185, 129, 0.4);
  background: linear-gradient(135deg, #34d399 0%, var(--emerald) 100%);
}

.btn-secondary {
  background: rgba(30, 41, 59, 0.6);
  color: var(--text-main);
  border-color: var(--border-color);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(51, 65, 85, 0.8);
  border-color: var(--emerald);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-full {
  width: 100%;
}

/* Hero Section */
.hero {
  padding: 5rem 0 4rem;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--emerald);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 2.5rem;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.badge-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.badge-icon {
  color: var(--emerald);
  display: flex;
  align-items: center;
}

/* Glass Card */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

/* Live Interactive Customizer Sandbox */
.sandbox-section {
  padding: 4rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

.customizer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.controls-wrapper {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.mode-selector {
  display: flex;
  background: rgba(15, 23, 42, 0.9);
  padding: 0.35rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.mode-btn {
  flex: 1;
  padding: 0.6rem 1rem;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.mode-btn.active {
  background: var(--emerald);
  color: #090e18;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

.input-text, .select-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
}

.input-text:focus, .select-input:focus {
  border-color: var(--emerald);
  box-shadow: 0 0 0 3px var(--emerald-glow);
}

.color-controls-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.color-picker-wrapper {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.35rem 0.75rem;
}

.color-input {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: 28px;
  height: 28px;
  border: none;
  cursor: pointer;
  background: transparent;
  border-radius: 4px;
}

.color-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-input::-webkit-color-swatch {
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
}

.color-hex {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-main);
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
}

.range-input {
  width: 100%;
  accent-color: var(--emerald);
  cursor: pointer;
}

/* Output Preview Panel */
.preview-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 420px;
  background: rgba(9, 14, 24, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
}

.preview-box {
  background: #ffffff;
  padding: 1.5rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  transition: var(--transition);
  max-width: 100%;
  overflow: auto;
}

.preview-box svg {
  display: block;
  max-width: 100%;
  height: auto;
}

.preview-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.75rem;
  width: 100%;
  justify-content: center;
}

.preview-meta {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--text-dim);
  display: flex;
  gap: 1.5rem;
}

/* Interactive Code Sandbox Section */
.code-section {
  padding: 4rem 0;
}

.code-container {
  background: #0d1322;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: rgba(15, 23, 42, 0.8);
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 1rem;
}

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

.endpoint-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.endpoint-btn.active {
  background: rgba(16, 185, 129, 0.15);
  border-color: var(--emerald);
  color: var(--emerald);
  font-weight: 600;
}

.lang-tabs {
  display: flex;
  gap: 0.5rem;
  background: rgba(9, 14, 24, 0.8);
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
}

.lang-btn.active {
  background: var(--bg-card-hover);
  color: var(--text-main);
}

.code-body {
  position: relative;
  padding: 1.5rem;
}

.code-block {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: #e2e8f0;
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre;
}

.copy-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
}

.copy-btn:hover {
  color: var(--text-main);
  border-color: var(--emerald);
  background: rgba(16, 185, 129, 0.1);
}

/* Features Section */
.features-section {
  padding: 4rem 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: var(--transition);
}

.feature-card:hover {
  border-color: rgba(16, 185, 129, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(6, 182, 212, 0.15));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--emerald);
  margin-bottom: 1.25rem;
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature-desc {
  color: var(--text-muted);
  font-size: 0.925rem;
}

/* Pricing Section */
.pricing-section {
  padding: 5rem 0;
}

.pricing-wrapper {
  max-width: 520px;
  margin: 0 auto;
}

.pricing-card {
  position: relative;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.9) 0%, rgba(9, 14, 24, 0.95) 100%);
  border: 2px solid var(--emerald);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: 0 0 50px rgba(16, 185, 129, 0.2);
  text-align: center;
}

.pricing-badge {
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--emerald), var(--cyan));
  color: #090e18;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 0.3rem 1.2rem;
  border-radius: var(--radius-full);
}

.pricing-plan-name {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.pricing-plan-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.75rem;
}

.pricing-amount {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--text-main);
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.25rem;
  margin-bottom: 2rem;
}

.pricing-amount span {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: #cbd5e1;
}

.pricing-feature-item svg {
  color: var(--emerald);
  flex-shrink: 0;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
  background: rgba(9, 14, 24, 0.95);
  margin-top: 4rem;
}

.footer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-main);
}

.footer-copy {
  color: var(--text-dim);
  font-size: 0.875rem;
}

/* Toast Notifications */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--emerald);
  color: #090e18;
  font-weight: 600;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  z-index: 1000;
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Responsive Styles */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.75rem;
  }
  
  .customizer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 2.1rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
  }
  
  .nav-links {
    display: none; /* Mobile nav minimal */
  }
  
  .pricing-card {
    padding: 1.75rem 1.25rem;
  }
  
  .code-header {
    flex-direction: column;
    align-items: flex-start;
  }
}