/* CSS Reset & Variables */
:root {
  --bg-primary: #0b0b14;
  --bg-secondary: #121225;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  
  --accent-start: #6366f1;   /* Indigo */
  --accent-end: #a855f7;     /* Purple */
  --accent-glow: rgba(99, 102, 241, 0.2);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #818cf8;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.18);
  --border-active: rgba(99, 102, 241, 0.5);

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  max-width: 100vw;
}

body {
  overflow-x: hidden;
  max-width: 100vw;
  line-height: 1.6;
}

/* Scrollbar Style */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-secondary);
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-start);
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.gradient-text {
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

/* Header & Navigation */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(11, 11, 20, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition-smooth);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4.5rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.logo-icon {
  width: 2rem;
  height: 2rem;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #fff;
  font-size: 1.1rem;
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

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

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition-smooth);
  position: relative;
  padding: 0.5rem 0;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-start), var(--accent-end));
  transition: var(--transition-smooth);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--text-primary);
  margin: 5px 0;
  transition: var(--transition-smooth);
}

/* Hero Section */
#hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 0 4rem;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center top;
  z-index: 1;
  pointer-events: none;
}

.hero-glow-1 {
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(99, 102, 241, 0) 70%);
  top: -10%;
  left: -10%;
  z-index: 1;
  pointer-events: none;
  filter: blur(40px);
}

.hero-glow-2 {
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.12) 0%, rgba(168, 85, 247, 0) 70%);
  bottom: -10%;
  right: -10%;
  z-index: 1;
  pointer-events: none;
  filter: blur(40px);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--text-accent);
  margin-bottom: 2rem;
  transition: var(--transition-smooth);
}

.hero-badge:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-hover);
}

.hero-title {
  font-size: 3.5rem;
  line-height: 1.15;
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 0.5rem;
  text-decoration: none;
  transition: var(--transition-smooth);
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  color: #fff;
  border: none;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(99, 102, 241, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

/* Sections Base Styling */
section {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 4rem;
}

.section-subtitle {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-accent);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.section-title {
  font-size: 2.25rem;
  margin-bottom: 1rem;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* Advantages Section */
#advantages {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.advantage-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 1rem;
  padding: 2.25rem;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.advantage-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at top left, var(--accent-glow) 0%, transparent 60%);
  opacity: 0;
  transition: var(--transition-smooth);
  pointer-events: none;
}

.advantage-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.advantage-card:hover::before {
  opacity: 1;
}

.advantage-icon {
  font-size: 2rem;
  margin-bottom: 1.25rem;
  display: inline-block;
}

.advantage-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.advantage-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Features Interactive Section */
.features-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 1024px) {
  .features-container {
    grid-template-columns: 240px 1fr;
  }
}

.features-tabs {
  display: flex;
  flex-direction: row;
  overflow-x: auto;
  gap: 0.75rem;
  padding-bottom: 1rem;
}

@media (min-width: 1024px) {
  .features-tabs {
    flex-direction: column;
    overflow-x: visible;
    padding-bottom: 0;
  }
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  border-radius: 0.75rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-align: left;
  white-space: nowrap;
}

.tab-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.tab-btn.active {
  background: rgba(99, 102, 241, 0.1);
  color: var(--text-primary);
  border-color: var(--accent-start);
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.15);
}

.tab-btn-icon {
  font-size: 1.25rem;
}

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

.features-content-wrapper {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: 1rem;
  padding: 2rem;
  position: relative;
  min-height: 480px;
}

.tab-panel {
  display: none;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.tab-panel.active {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  opacity: 1;
  transform: translateY(0);
}

@media (min-width: 768px) {
  .tab-panel.active {
    grid-template-columns: 260px 1fr;
  }
}

.panel-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.panel-title {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.panel-desc {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 1rem;
}

/* Accordion Component */
.accordion {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}

.accordion-item {
  border: 1px solid var(--border-subtle);
  border-radius: 0.5rem;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.01);
  transition: var(--transition-smooth);
}

.accordion-header {
  width: 100%;
  padding: 1rem;
  background: none;
  border: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  text-align: left;
}

.accordion-header:hover {
  background: rgba(255, 255, 255, 0.02);
}

.accordion-icon {
  font-size: 0.8rem;
  transition: transform 0.3s ease;
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  background: rgba(0, 0, 0, 0.15);
}

.accordion-content-inner {
  padding: 1rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-subtle);
}

.accordion-item.active {
  border-color: var(--border-hover);
}

.accordion-item.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-item.active .accordion-content {
  max-height: 1000px;
  transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
}

/* Code Preview Area */
.panel-preview {
  display: flex;
  flex-direction: column;
  border-radius: 0.75rem;
  background: #06060c;
  border: 1px solid var(--border-subtle);
  overflow: hidden;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.25rem;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border-subtle);
}

.preview-dots {
  display: flex;
  gap: 0.4rem;
}

.preview-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.preview-dots span:nth-child(1) { background-color: #ef4444; }
.preview-dots span:nth-child(2) { background-color: #f59e0b; }
.preview-dots span:nth-child(3) { background-color: #10b981; }

.preview-title {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: monospace;
}

.preview-copy {
  background: none;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.3rem 0.6rem;
  border-radius: 0.25rem;
  font-size: 0.75rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.preview-copy:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.preview-body {
  padding: 1.25rem;
  overflow-x: auto;
  font-family: 'Fira Code', 'Courier New', Courier, monospace;
  font-size: 0.85rem;
  margin: 0;
  max-height: 380px;
}

.preview-body pre {
  margin: 0;
}

.preview-body code {
  color: #a5b4fc !important;
  background: transparent !important;
  padding: 0 !important;
  border-radius: 0 !important;
  font-size: inherit !important;
  font-family: inherit !important;
}

/* Syntax Highlighting */
.code-keyword { color: #f43f5e; font-weight: bold; }
.code-string { color: #34d399; }
.code-number { color: #fb923c; }
.code-comment { color: #64748b; font-style: italic; }
.code-property { color: #60a5fa; }
.code-type { color: #a78bfa; }

/* Interactive Demo Elements */
.interactive-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.01);
  border-radius: 0.75rem;
  border: 1px solid var(--border-subtle);
}

.demo-endpoint-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.demo-endpoint-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 0.5rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.demo-endpoint-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}

.demo-endpoint-item input {
  cursor: pointer;
  accent-color: var(--accent-start);
  width: 1.1rem;
  height: 1.1rem;
}

.demo-endpoint-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 0.25rem;
  text-transform: uppercase;
}

.badge-get { background: rgba(16, 185, 129, 0.15); color: #10b981; }
.badge-post { background: rgba(59, 130, 246, 0.15); color: #3b82f6; }
.badge-delete { background: rgba(239, 68, 68, 0.15); color: #ef4444; }

.demo-endpoint-path {
  font-family: monospace;
  font-size: 0.9rem;
  color: var(--text-primary);
  flex-grow: 1;
}

.demo-stats {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.demo-stat-val {
  font-weight: 700;
  color: var(--accent-end);
  font-family: monospace;
}

/* Quick Start Section */
#quickstart {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.quickstart-modes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

@media (min-width: 768px) {
  .quickstart-modes {
    grid-template-columns: 1fr 1fr;
  }
}

.quickstart-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 1rem;
  padding: 2.5rem;
  transition: var(--transition-smooth);
}

.quickstart-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.quickstart-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.step-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.step-item {
  display: flex;
  gap: 1rem;
}

.step-num {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
}

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

.step-content h4 {
  font-size: 1.05rem;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.step-content p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.step-content code {
  background: rgba(0, 0, 0, 0.3);
  padding: 0.2rem 0.4rem;
  border-radius: 0.25rem;
  font-family: monospace;
  color: var(--text-accent);
  font-size: 0.9em;
}

/* Footer */
footer {
  padding: 4rem 0;
  background-color: var(--bg-primary);
}

.footer-content {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 2.5rem;
}

@media (min-width: 768px) {
  .footer-content {
    flex-direction: row;
  }
}

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

@media (min-width: 768px) {
  .footer-info {
    text-align: left;
  }
}

.footer-logo {
  margin-bottom: 0.5rem;
}

.footer-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

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

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

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 2rem;
}

/* Scroll Animation Classes */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delay classes */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* Mobile Menu Navigation Override */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 4.5rem;
    left: 0;
    width: 100%;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    transform: translateY(-150%);
    transition: transform 0.3s ease-in-out;
    z-index: 999;
  }

  .nav-links.active {
    transform: translateY(0);
  }

  .hamburger {
    display: block;
  }

  .hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }

  .hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
  }
  
  .hero-title {
    font-size: 2.25rem;
  }
}