/* ====================================================================
   SAMPLE WEBSITE - PURE BLACK & VIBRANT TEAL DESIGN SYSTEM
   "Understand complex things simply in one click, also check facts"
   ==================================================================== */

:root {
  --bg-pitch: #040507;
  --bg-primary: #080a0f;
  --bg-card: #0d1117;
  --bg-card-hover: #121720;
  --bg-glass: rgba(13, 17, 23, 0.75);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-card: rgba(255, 255, 255, 0.1);
  --border-teal: rgba(13, 242, 201, 0.25);
  --border-teal-active: rgba(13, 242, 201, 0.6);

  --teal-neon: #0df2c9;
  --teal-cyan: #00e5ff;
  --teal-deep: #0ea5e9;
  --teal-dim: rgba(13, 242, 201, 0.12);
  --teal-glow: 0 0 28px rgba(13, 242, 201, 0.25);
  --teal-glow-strong: 0 0 45px rgba(13, 242, 201, 0.45);

  --text-white: #ffffff;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition-fast: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-pitch);
}

body {
  background-color: var(--bg-pitch);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Background Ambient Glow & Grid */
.glow-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
}

.glow-orb-1 {
  width: 520px;
  height: 520px;
  top: -160px;
  right: -100px;
  background: radial-gradient(circle, #0df2c9 0%, #00e5ff 40%, transparent 70%);
}

.glow-orb-2 {
  width: 600px;
  height: 600px;
  top: 45%;
  left: -200px;
  background: radial-gradient(circle, rgba(13, 242, 201, 0.18) 0%, rgba(14, 165, 233, 0.1) 50%, transparent 75%);
}

.grid-overlay {
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: 0;
}

/* Navigation */
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(4, 5, 7, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, #0df2c9, #00e5ff);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(13, 242, 201, 0.4);
}

.logo-sparkle {
  color: #040507;
  font-size: 17px;
  font-weight: 900;
  line-height: 1;
}

.brand-name {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-white);
}

.badge-tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--teal-neon);
  background: var(--teal-dim);
  border: 1px solid var(--border-teal);
  padding: 2px 7px;
  border-radius: var(--radius-full);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition-fast);
}

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

.btn-teal-small {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--teal-dim);
  color: var(--teal-neon);
  border: 1px solid var(--border-teal);
  padding: 7px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-fast);
}

.btn-teal-small:hover {
  background: var(--teal-neon);
  color: #040507;
  box-shadow: var(--teal-glow);
  border-color: var(--teal-neon);
}

/* Hero Section */
.hero-section {
  position: relative;
  z-index: 1;
  padding: 90px 24px 60px;
  text-align: center;
}

.hero-container {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(13, 242, 201, 0.07);
  border: 1px solid var(--border-teal);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--teal-neon);
  margin-bottom: 24px;
}

.pulse-teal-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal-neon);
  box-shadow: 0 0 10px var(--teal-neon);
  animation: pulseTeal 1.8s infinite;
}

@keyframes pulseTeal {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.35); opacity: 1; box-shadow: 0 0 16px var(--teal-neon); }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.035em;
  color: var(--text-white);
  margin-bottom: 20px;
}

.teal-gradient-text {
  background: linear-gradient(135deg, #0df2c9 10%, #00e5ff 60%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 700px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}

.btn-hero-teal {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, #0df2c9, #00e5ff);
  color: #040507;
  padding: 13px 28px;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 6px 24px rgba(13, 242, 201, 0.35);
  transition: var(--transition-smooth);
}

.btn-hero-teal:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 36px rgba(13, 242, 201, 0.55);
}

.btn-hero-outline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-white);
  border: 1px solid var(--border-card);
  padding: 13px 26px;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-fast);
}

.btn-hero-outline:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--teal-neon);
  color: var(--teal-neon);
}

.hero-chips {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.chip-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  color: var(--text-secondary);
  background: rgba(13, 17, 23, 0.6);
  border: 1px solid var(--border-subtle);
  padding: 5px 12px;
  border-radius: var(--radius-full);
}

.chip-check {
  color: var(--teal-neon);
  font-weight: 700;
}

/* Demo Section */
.demo-section {
  position: relative;
  z-index: 1;
  padding: 60px 24px 80px;
}

.section-container {
  max-width: 1080px;
  margin: 0 auto;
}

.section-badge {
  text-align: center;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--teal-neon);
  margin-bottom: 10px;
}

.section-title {
  text-align: center;
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-white);
  margin-bottom: 12px;
}

.section-subtitle {
  text-align: center;
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto 36px;
}

/* Demo Filters */
.demo-filter-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  user-select: none;
}

.filter-chip:hover {
  border-color: var(--border-teal);
  color: var(--text-white);
}

.filter-chip.active {
  background: var(--teal-dim);
  border-color: var(--teal-neon);
  color: var(--teal-neon);
  box-shadow: var(--teal-glow);
}

/* Demo Cards */
.demo-cards-wrapper {
  position: relative;
}

.demo-card {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--border-teal);
  border-radius: var(--radius-lg);
  padding: 26px 32px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6);
  position: relative;
  transition: var(--transition-smooth);
}

.demo-card.active {
  display: block;
  animation: fadeIn 0.25s ease forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.demo-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  flex-wrap: wrap;
  gap: 12px;
}

.demo-tag {
  font-size: 12.5px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.teal-tag {
  background: var(--teal-dim);
  color: var(--teal-neon);
  border: 1px solid var(--border-teal);
}

.btn-quick-run {
  background: linear-gradient(135deg, rgba(13, 242, 201, 0.15), rgba(0, 229, 255, 0.1));
  color: var(--teal-neon);
  border: 1px solid var(--border-teal);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-quick-run:hover {
  background: var(--teal-neon);
  color: #040507;
  box-shadow: var(--teal-glow);
}

.demo-card-body {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-white);
  padding: 18px;
  background: rgba(4, 5, 7, 0.65);
  border-radius: var(--radius-md);
  border: 1px dashed rgba(255, 255, 255, 0.12);
  user-select: text;
  cursor: text;
}

.demo-card-body::selection {
  background: rgba(13, 242, 201, 0.35);
  color: #ffffff;
}

.demo-card-footer {
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-hint {
  font-size: 12.5px;
  color: var(--teal-neon);
  opacity: 0.9;
}

/* Custom Box in Demo */
.demo-custom-box textarea {
  width: 100%;
  min-height: 120px;
  background: rgba(4, 5, 7, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  color: var(--text-white);
  font-size: 15px;
  font-family: var(--font-sans);
  resize: vertical;
  outline: none;
  transition: var(--transition-fast);
}

.demo-custom-box textarea:focus {
  border-color: var(--teal-neon);
  box-shadow: var(--teal-glow);
}

.custom-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
}

.btn-teal-action {
  background: linear-gradient(135deg, #0df2c9, #00e5ff);
  color: #040507;
  border: none;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-teal-action:hover {
  box-shadow: var(--teal-glow-strong);
}

.btn-outline-action {
  background: transparent;
  color: var(--text-white);
  border: 1px solid var(--border-teal);
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-outline-action:hover {
  background: var(--teal-dim);
  color: var(--teal-neon);
}

/* Features Section */
.features-section {
  position: relative;
  z-index: 1;
  padding: 70px 24px;
  background: linear-gradient(180deg, transparent, rgba(13, 17, 23, 0.5) 50%, transparent);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 22px;
  margin-top: 40px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--teal-neon), transparent);
  opacity: 0;
  transition: var(--transition-fast);
}

.feature-card:hover {
  border-color: var(--border-teal);
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
}

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

.feature-icon-box {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--teal-dim);
  border: 1px solid var(--border-teal);
  color: var(--teal-neon);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
}

.feature-text {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* How It Works */
.how-section {
  position: relative;
  z-index: 1;
  padding: 70px 24px;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

@media (max-width: 860px) {
  .steps-grid {
    grid-template-columns: 1fr;
  }
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 30px;
  position: relative;
}

.step-number {
  font-size: 32px;
  font-weight: 800;
  color: var(--teal-neon);
  font-family: var(--font-mono);
  margin-bottom: 16px;
  opacity: 0.9;
}

.step-heading {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
}

.step-body {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Install Section */
.install-section {
  position: relative;
  z-index: 1;
  padding: 70px 24px 90px;
}

.install-box {
  background: var(--bg-card);
  border: 1px solid var(--border-teal);
  border-radius: var(--radius-lg);
  padding: 42px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.7);
}

@media (max-width: 900px) {
  .install-box {
    grid-template-columns: 1fr;
  }
}

.install-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-white);
  margin: 8px 0 12px;
}

.install-desc {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 26px;
}

.install-steps-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.install-step-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.step-dot {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--teal-dim);
  border: 1px solid var(--teal-neon);
  color: var(--teal-neon);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.install-step-item strong {
  font-size: 14.5px;
  color: var(--text-white);
}

.install-step-item p {
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-top: 3px;
}

.install-step-item code {
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border-subtle);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--teal-neon);
  font-family: var(--font-mono);
  font-size: 12px;
}

.path-copy-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(4, 5, 7, 0.85);
  border: 1px solid var(--border-teal);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  margin-top: 8px;
  gap: 10px;
}

.path-text {
  font-size: 12px;
  color: var(--teal-neon);
  font-family: var(--font-mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.btn-copy {
  background: var(--teal-dim);
  color: var(--teal-neon);
  border: 1px solid var(--border-teal);
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  flex-shrink: 0;
  transition: var(--transition-fast);
}

.btn-copy:hover {
  background: var(--teal-neon);
  color: #040507;
}

/* Install Right Preview */
.preview-mini-card {
  background: rgba(4, 5, 7, 0.95);
  border: 1px solid var(--border-teal);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.6);
  position: relative;
}

.preview-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #0d1117;
  border: 1px solid var(--border-teal);
  color: var(--text-white);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
  box-shadow: var(--teal-glow);
  margin-bottom: 16px;
}

.preview-sparkle {
  color: var(--teal-neon);
}

.preview-output {
  background: #0d1117;
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 16px;
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.preview-brand {
  font-size: 13px;
  font-weight: 800;
  color: var(--teal-neon);
  letter-spacing: -0.02em;
}

.preview-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal-neon);
}

.preview-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.preview-text {
  font-size: 13.5px;
  color: var(--text-white);
  line-height: 1.55;
  margin-bottom: 10px;
}

.preview-fact {
  font-size: 12px;
  font-weight: 600;
  color: var(--teal-neon);
  background: var(--teal-dim);
  border: 1px solid var(--border-teal);
  padding: 4px 10px;
  border-radius: 6px;
}

/* Footer */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border-subtle);
  background: rgba(4, 5, 7, 0.95);
  padding: 36px 24px;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-title {
  font-size: 15px;
  font-weight: 800;
  color: var(--text-white);
}

.footer-desc {
  font-size: 13px;
  color: var(--text-secondary);
}

.footer-meta {
  font-size: 12.5px;
  color: var(--text-muted);
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .hero-title {
    font-size: 36px;
  }
  .hero-description {
    font-size: 16px;
  }
  .nav-links {
    display: none;
  }
  .demo-card {
    padding: 18px 20px;
  }
  .footer-container {
    flex-direction: column;
    text-align: center;
  }
}