/* ==========================================================================
   JetCutter Landing Page - CSS
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables
   -------------------------------------------------------------------------- */
:root {
  /* Background Colors */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a24;
  --bg-card-hover: #222230;

  /* Accent Colors */
  --accent-primary: #8b5cf6;
  --accent-secondary: #06b6d4;
  --accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);

  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Border */
  --border-color: rgba(255, 255, 255, 0.1);

  /* Effects */
  --glow-purple: 0 0 40px rgba(139, 92, 246, 0.3);
  --glow-cyan: 0 0 40px rgba(6, 182, 212, 0.3);

  /* Spacing */
  --container-max: 1200px;
  --section-padding: 6rem 0;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
}

/* --------------------------------------------------------------------------
   Reset & Base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--accent-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-primary);
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: var(--section-padding);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.version-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  background: var(--accent-gradient);
  -webkit-background-clip: unset;
  -webkit-text-fill-color: var(--bg-primary);
  background-clip: unset;
  border-radius: 4px;
  color: var(--bg-primary);
}

.nav {
  display: flex;
  gap: 2rem;
}

.nav a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 0.5rem;
  transition: all var(--transition-medium);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--glow-purple);
  color: white;
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

.btn-large {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 64px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('../images/hero-bg.png') center/cover no-repeat;
  opacity: 0.6;
  z-index: -1;
}

.hero-bg::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: linear-gradient(to top, var(--bg-primary), transparent);
}

.hero-content {
  text-align: center;
  max-width: 800px;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

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

/* --------------------------------------------------------------------------
   Problem Section
   -------------------------------------------------------------------------- */
.problem {
  background: var(--bg-secondary);
}

.problem-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.problem-text p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 1.125rem;
}

.problem-text .highlight {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.25rem;
  margin-top: 2rem;
}

/* --------------------------------------------------------------------------
   Solution Section
   -------------------------------------------------------------------------- */
.solution-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.solution-intro {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 2rem;
}

.solution-list {
  list-style: none;
  text-align: left;
  max-width: 500px;
  margin: 0 auto 2rem;
}

.solution-list li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.solution-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  background: var(--accent-gradient);
  border-radius: 50%;
}

.solution-outro {
  font-size: 1.125rem;
  color: var(--accent-secondary);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   Benefits Section
   -------------------------------------------------------------------------- */
.benefits {
  background: var(--bg-secondary);
}

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

.benefit-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
  transition: all var(--transition-medium);
}

.benefit-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--glow-purple);
  border-color: var(--accent-primary);
}

.benefit-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1.5rem;
}

.benefit-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.benefit-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.benefit-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* --------------------------------------------------------------------------
   Features Section (Tabs)
   -------------------------------------------------------------------------- */
.features-tabs {
  max-width: 900px;
  margin: 0 auto;
}

.tabs-nav {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.tab-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.tab-btn.active {
  background: var(--accent-gradient);
  border-color: transparent;
  color: white;
}

.tabs-content {
  position: relative;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 2rem;
  align-items: center;
}

.tab-text h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.tab-text p {
  color: var(--text-secondary);
}

.screenshot {
  border-radius: 0.75rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), var(--glow-purple);
  border: 1px solid var(--border-color);
}

/* --------------------------------------------------------------------------
   Stats Section
   -------------------------------------------------------------------------- */
.stats {
  background: var(--bg-secondary);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  text-align: center;
}

.stat-item {
  padding: 2rem;
}

.stat-number {
  display: block;
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* --------------------------------------------------------------------------
   NLE Section
   -------------------------------------------------------------------------- */
.nle-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: 700px;
  margin: 0 auto;
}

.nle-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2rem;
  text-align: center;
  transition: all var(--transition-medium);
}

.nle-card:hover {
  border-color: var(--accent-secondary);
}

.nle-logo {
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  color: var(--accent-secondary);
}

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

.nle-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* --------------------------------------------------------------------------
   Install Section
   -------------------------------------------------------------------------- */
.install {
  background: var(--bg-secondary);
}

.install-steps {
  max-width: 600px;
  margin: 0 auto;
}

.install-step {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--accent-gradient);
  border-radius: 50%;
  font-weight: 700;
  flex-shrink: 0;
}

.step-content h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.step-content code {
  display: block;
  background: var(--bg-primary);
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  font-family: 'SF Mono', Monaco, monospace;
  font-size: 0.9rem;
  color: var(--accent-secondary);
  border: 1px solid var(--border-color);
}

.install-note {
  text-align: center;
  color: var(--text-muted);
  margin-top: 2rem;
}

.install-note code {
  background: var(--bg-card);
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   FAQ Section
   -------------------------------------------------------------------------- */
.faq-list {
  max-width: 700px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  margin-bottom: 1rem;
  overflow: hidden;
}

.faq-item summary {
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-primary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--accent-primary);
  transition: transform var(--transition-fast);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  padding: 0 1.5rem 1.25rem;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   CTA Section
   -------------------------------------------------------------------------- */
.cta {
  background: var(--bg-secondary);
}

.cta-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.cta-content p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border-color);
}

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

.footer-logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.footer-tagline {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.footer-links span {
  color: var(--text-muted);
}

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

/* --------------------------------------------------------------------------
   Animations
   -------------------------------------------------------------------------- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .nav {
    gap: 1rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .tab-panel.active {
    grid-template-columns: 1fr;
  }

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

  .tabs-nav {
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .nav {
    display: none;
  }

  .section {
    padding: 4rem 0;
  }

  .benefits-grid {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------------------------
   Accessibility
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}