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

:root {
  --bg-dark: #070710;
  --bg-surface: rgba(18, 18, 32, 0.7);
  --bg-card: rgba(24, 24, 44, 0.6);
  --bg-card-hover: rgba(32, 32, 58, 0.75);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 212, 255, 0.35);

  --accent-cyan: #00d4ff;
  --accent-magenta: #ff00aa;
  --accent-violet: #a855ff;
  --accent-green: #39ff14;
  --accent-amber: #ffaa00;

  --text-main: #f3f4f8;
  --text-muted: #9ba1b8;
  --text-dim: #646a82;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

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

/* Ambient Background Glow */
.ambient-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient-glow::before {
  content: '';
  position: absolute;
  top: -20%;
  left: 15%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(255, 0, 170, 0.12) 0%, rgba(168, 85, 255, 0.06) 40%, transparent 70%);
  filter: blur(80px);
  animation: pulseOrb 12s ease-in-out infinite alternate;
}

.ambient-glow::after {
  content: '';
  position: absolute;
  top: 40%;
  right: 5%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, rgba(16, 185, 129, 0.04) 40%, transparent 70%);
  filter: blur(90px);
  animation: pulseOrb 14s ease-in-out infinite alternate-reverse;
}

@keyframes pulseOrb {
  0% { transform: scale(1) translate(0, 0); }
  100% { transform: scale(1.15) translate(30px, 40px); }
}

/* Container */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Header & Navbar */
.navbar {
  position: sticky;
  top: 0;
  width: 100%;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(7, 7, 16, 0.75);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
  transition: var(--transition-fast);
}

.navbar .nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--text-main);
  flex-shrink: 0;
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.35);
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.brand:hover .brand-icon {
  transform: rotate(8deg) scale(1.05);
}

.brand-name {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 40%, #00d4ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

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

.nav-links a:hover {
  color: #ffffff;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.4);
}

.btn-nav {
  padding: 10px 22px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #ff00aa, #8b5cf6);
  color: #ffffff !important;
  font-weight: 600;
  box-shadow: 0 4px 18px rgba(255, 0, 170, 0.35);
  white-space: nowrap;
  flex-shrink: 0;
  text-align: center;
}

.btn-nav:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255, 0, 170, 0.55);
}

/* Mobile & Tablet Header: Hide links, show only Brand Name & Get App button */
@media (max-width: 820px) {
  .nav-desktop-only,
  .nav-links li:not(:last-child) {
    display: none !important;
  }
  .navbar .nav-container {
    height: 64px;
  }
  .brand {
    gap: 10px;
  }
  .brand-icon {
    width: 36px;
    height: 36px;
  }
  .brand-name {
    font-size: 1.12rem;
    white-space: nowrap;
  }
  .nav-links {
    gap: 0;
  }
  .btn-nav {
    padding: 8px 18px;
    font-size: 0.85rem;
  }
}

@media (max-width: 380px) {
  .brand-name {
    font-size: 1.0rem;
  }
  .btn-nav {
    padding: 7px 14px;
    font-size: 0.8rem;
  }
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
}

@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 48px 0 40px;
  }
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.25);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 24px;
}

.hero-tag .tag-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.hero h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.4rem, 4.5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero h1 span.gradient-text {
  background: linear-gradient(135deg, #00d4ff 10%, #ff00aa 70%, #ffaa00 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 36px;
}

@media (max-width: 960px) {
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 960px) {
  .hero-cta {
    justify-content: center;
  }
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  background: linear-gradient(135deg, #00d4ff, #8b5cf6);
  color: #ffffff;
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 28px rgba(0, 212, 255, 0.35);
  transition: var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(0, 212, 255, 0.5);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  border-radius: var(--radius-md);
  backdrop-filter: blur(12px);
  transition: var(--transition-fast);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Interactive Canvas Card */
.demo-card {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.demo-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.demo-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
}

.demo-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(57, 255, 20, 0.1);
  color: var(--accent-green);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.demo-status-pill::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 6px var(--accent-green);
}

.canvas-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  max-width: 440px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #090914;
  border: 1px solid rgba(255, 255, 255, 0.05);
  cursor: pointer;
  box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.8);
}

#simulationCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.canvas-hint {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(7, 7, 16, 0.75);
  backdrop-filter: blur(8px);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-muted);
  pointer-events: none;
  white-space: nowrap;
  transition: opacity 0.3s;
}

.demo-controls {
  width: 100%;
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 14px;
}

.btn-control {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-fast);
}

.btn-control:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
}

/* Features Grid */
.section {
  padding: 90px 0;
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-badge {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-magenta);
  margin-bottom: 12px;
}

.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 3.5vw, 2.7rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  opacity: 0;
  transition: var(--transition-smooth);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

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

.feature-icon-box {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 22px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1);
  transition: var(--transition-fast);
}

.feature-icon-box.icon-physics {
  background: rgba(0, 212, 255, 0.12);
  border-color: rgba(0, 212, 255, 0.35);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.feature-icon-box.icon-chimes {
  background: rgba(255, 0, 170, 0.12);
  border-color: rgba(255, 0, 170, 0.35);
  box-shadow: 0 0 20px rgba(255, 0, 170, 0.25);
}

.feature-icon-box.icon-tuning {
  background: rgba(255, 170, 0, 0.12);
  border-color: rgba(255, 170, 0, 0.35);
  box-shadow: 0 0 20px rgba(255, 170, 0, 0.2);
}

.feature-icon-box.icon-mobile {
  background: rgba(57, 255, 20, 0.12);
  border-color: rgba(57, 255, 20, 0.35);
  box-shadow: 0 0 20px rgba(57, 255, 20, 0.2);
}

.feature-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #ffffff;
}

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

/* App Store Banner */
.cta-banner {
  background: linear-gradient(135deg, rgba(255, 0, 170, 0.15), rgba(0, 212, 255, 0.15));
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(20px);
  margin: 40px 0 80px;
}

.cta-banner h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-banner p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 580px;
  margin: 0 auto 32px;
}

/* Footer */
footer {
  background: rgba(5, 5, 12, 0.85);
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 32px;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

@media (max-width: 820px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand p {
  color: var(--text-muted);
  margin-top: 12px;
  max-width: 320px;
}

.footer-col h4 {
  color: var(--text-main);
  font-weight: 600;
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-col a:hover {
  color: #ffffff;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  gap: 16px;
}

/* Content Pages (Privacy, Terms) */
.page-content {
  padding: 60px 0 100px;
  max-width: 840px;
  margin: 0 auto;
}

.page-header {
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 24px;
}

.page-header h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: 12px;
}

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

.content-body {
  color: #d1d5db;
  font-size: 1.05rem;
  line-height: 1.8;
}

.content-body h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.6rem;
  color: #ffffff;
  margin: 36px 0 14px;
}

.content-body h3 {
  font-size: 1.25rem;
  color: #ffffff;
  margin: 24px 0 10px;
}

.content-body p, .content-body ul {
  margin-bottom: 20px;
}

.content-body ul {
  padding-left: 24px;
}

.content-body li {
  margin-bottom: 8px;
}

.content-body a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.content-body a:hover {
  color: #ffffff;
}

.content-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 24px 0;
}