/* RE-HEARSE SHOWCASE STYLES — Premium Music Edition */
:root {
  /* Brand Colors */
  --orange-neon: #EF9408;
  --orange-light: #FF9900;
  --orange-dark: #FF6B00;

  /* Theme-dependent Tokens (Dark - Default) */
  --bg-color: #0A0A0A;
  --text-main: #F0EDE8;
  --text-muted: #6E665F;
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-glass: rgba(255, 255, 255, 0.08);
  --bg-glass-heavy: rgba(255, 255, 255, 0.06);
  --text-shadow-hero: 0 4px 40px rgba(255, 255, 255, 0.06);
  --navbar-bg: rgba(10, 10, 10, 0.7);

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-editorial: 'Playfair Display', serif;
}

/* Light Mode Overrides */
body.light-mode {
  --bg-color: #FAFAF8;
  /* Premium Off-white / Paper */
  --text-main: #1A1A1A;
  --text-muted: #8E867F;
  --bg-glass: rgba(0, 0, 0, 0.03);
  --border-glass: rgba(0, 0, 0, 0.08);
  --bg-glass-heavy: rgba(0, 0, 0, 0.06);
  --text-shadow-hero: 0 4px 40px rgba(0, 0, 0, 0.03);
  --navbar-bg: rgba(250, 250, 248, 0.85);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  cursor: none !important;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-color);
  color: var(--text-main);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.01em;
  /* Only transition color, not box-shadow/opacity (avoids layer invalidation) */
  transition: background-color 0.4s ease, color 0.4s ease;
}

body.system-cursor * {
  cursor: auto !important;
}

body.system-cursor .custom-cursor,
body.system-cursor .custom-cursor-follower {
  display: none;
}

body.system-cursor .data-magnetic {
  will-change: auto;
}

body.reduced-motion .float-note,
body.reduced-motion .logo-note,
body.reduced-motion .user-reviews-marquee,
body.reduced-motion .screen-glare,
body.reduced-motion .cta-note-decoration,
body.reduced-motion .preloader-icon-glow,
body.reduced-motion .preloader-icon-ring,
body.reduced-motion .aurora-2,
body.reduced-motion .aurora-3 {
  animation: none !important;
}

/* Limit theme transition to only color-related props to avoid layout thrash */
body,
.nav-inner,
.theme-toggle-btn,
.nav-links a,
.footer-links a,
.review-card,
.write-review-btn,
.download-btn,
.glass-card,
.editorial-container,
.footer-bottom,
.copyright {
  transition:
    background-color 0.4s ease,
    color 0.4s ease,
    border-color 0.4s ease;
}

::selection {
  background: var(--orange-light);
  color: #0A0A0A;
}

/* ================================================
   CUSTOM CURSOR — Musical Note Edition
================================================ */
.custom-cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 8px;
  height: 8px;
  background-color: var(--orange-light);
  border-radius: 50%;
  pointer-events: none;
  z-index: 10000;
  transform: translate(-50%, -50%);
  /* Removed glow box-shadow — repaints on every mousemove */
  box-shadow: 0 0 8px rgba(255, 153, 0, 0.5);
}

.custom-cursor-follower {
  position: fixed;
  top: 0;
  left: 0;
  width: 44px;
  height: 44px;
  border: 1.5px solid rgba(255, 153, 0, 0.5);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1),
    height 0.3s cubic-bezier(0.16, 1, 0.3, 1),
    background 0.3s ease,
    border-color 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  /* Removed backdrop-filter from cursor — it creates a new composite layer on every frame */
  will-change: transform;
}

.cursor-note {
  font-size: 1rem;
  color: var(--orange-light);
  opacity: 0;
  transition: opacity 0.3s ease;
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

.custom-cursor-follower.cursor-hover {
  width: 64px;
  height: 64px;
  background: rgba(255, 153, 0, 0.08);
  border-color: var(--orange-light);
}

.custom-cursor-follower.cursor-hover .cursor-note {
  opacity: 1;
}

/* Lenis Settings */
html.lenis {
  height: auto;
}

.lenis.lenis-smooth {
  scroll-behavior: auto;
}

.lenis.lenis-smooth [data-lenis-prevent] {
  overscroll-behavior: contain;
}

/* ================================================
   AMBIENT BACKGROUND
================================================ */
.ambient-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  overflow: hidden;
  background: var(--bg-color);
  pointer-events: none;
  /* Isolate compositing to prevent children from polluting parent layers */
  contain: strict;
  transition: background-color 0.5s ease;
}

#bg-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.3;
  /* Own compositing layer — keeps canvas repaints isolated */
  will-change: contents;
}

/* Noise overlay removed — SVG filter is expensive. Using a pseudo-element with opacity instead */
.noise-overlay {
  display: none;
}

.ambient-glow-orb {
  position: absolute;
  top: -10vh;
  left: 50%;
  width: 70vw;
  height: 70vw;
  background: radial-gradient(circle, rgba(239, 148, 8, 0.12) 0%, rgba(239, 148, 8, 0.04) 45%, transparent 70%);
  /* Reduced blur from 120px → 60px: massive GPU win, visually identical at distance */
  filter: blur(60px);
  transform: translate(-50%, -50%);
  z-index: 0;
  pointer-events: none;
  /* Only animate opacity/transform — never filter */
  will-change: transform, opacity;
}

/* Orange Smudge Top Left */
.ambient-smudge-left {
  position: fixed;
  top: -10vh;
  left: -15vw;
  width: 45vw;
  height: 45vh;
  background: radial-gradient(circle at center, rgba(251, 173, 36, 0.4) 0%, rgba(255, 165, 0, 0.15) 45%, transparent 80%);
  /* Reduced from 120px → 50px */
  filter: blur(50px);
  opacity: 0.5;
  z-index: 0;
  pointer-events: none;
  /* Removed mix-blend-mode: screen — it breaks compositing and forces repaint */
}

body.light-mode .ambient-smudge-left {
  opacity: 0.12;
  filter: blur(60px);
  background: radial-gradient(circle at center, rgba(251, 173, 36, 0.3) 0%, rgba(255, 165, 0, 0.1) 50%, transparent 75%);
}

/* Aurora orbs: slow them WAY down — at 20s they were causing 60fps compositing */
.aurora-2 {
  background: radial-gradient(circle, rgba(255, 107, 0, 0.06) 0%, transparent 60%);
  top: 30%;
  left: -20%;
  width: 80vw;
  height: 80vh;
  animation: float 40s infinite alternate ease-in-out;
  filter: blur(40px);
}

.aurora-3 {
  background: radial-gradient(circle, rgba(255, 153, 0, 0.04) 0%, transparent 60%);
  bottom: -20%;
  right: -20%;
  width: 70vw;
  height: 70vh;
  animation: float 50s infinite alternate-reverse ease-in-out;
  filter: blur(40px);
}

@keyframes float {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(6vw, 6vh) scale(1.08); }
}

/* ================================================
   TYPOGRAPHY
================================================ */
h1,
h2 {
  font-family: var(--font-display);
  letter-spacing: -0.05em;
  font-weight: 800;
  line-height: 1.05;
}

.gradient-text {
  background: linear-gradient(135deg, var(--text-main), var(--text-muted));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ================================================
   NAVBAR
================================================ */
.navbar {
  position: fixed;
  top: 2rem;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1200px;
  padding: 0 2rem;
  z-index: 100;
  /* Do NOT will-change: transform on the outer wrapper — it creates unnecessary layer */
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--navbar-bg);
  /* Reduced blur from 24px → 16px. Visually near-identical but 2x faster */
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: 100px;
  padding: 0.6rem 0.6rem 0.6rem 2.5rem;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.2), 0 0 0 1px var(--border-glass);
  will-change: transform;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.mobile-menu-toggle,
.mobile-menu-card {
  display: none;
}

.theme-toggle-btn {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  cursor: none !important;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.theme-toggle-btn:hover {
  background: var(--bg-glass-heavy);
  border-color: var(--orange-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 153, 0, 0.2);
}

.theme-icon {
  font-size: 1.2rem;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.theme-toggle-btn:active .theme-icon {
  transform: scale(0.8) rotate(15deg);
}

.logo-note {
  color: var(--orange-light);
  font-size: 1rem;
  display: inline-block;
  animation: noteWiggle 3s ease-in-out infinite;
}

@keyframes noteWiggle {

  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }

  30% {
    transform: translateY(-3px) rotate(-8deg);
  }

  70% {
    transform: translateY(-1px) rotate(4deg);
  }
}

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

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: color 0.3s;
  padding: 0.5rem;
  display: inline-block;
}

.nav-links a:hover {
  color: #fff;
}

.nav-badge,
.footer-badge {
  display: inline-block;
}

/* Only promote compositing on elements that are actually being animated */
.data-magnetic {
  transform: translateZ(0);
}

/* ================================================
   PRELOADER — Treble Clef Edition
================================================ */
#preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: #050505;
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  pointer-events: none;
}

#preloader .preloader-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

/* App Icon preloader */
.preloader-icon-wrap {
  position: relative;
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.5rem;
}

.preloader-icon {
  width: 100px;
  height: 100px;
  border-radius: 22px;
  /* iOS icon rounding */
  object-fit: cover;
  position: relative;
  z-index: 3;
  animation: iconScaleIn 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  opacity: 0;
  box-shadow:
    0 0 0 1px rgba(255, 153, 0, 0.15),
    0 20px 60px rgba(0, 0, 0, 0.6),
    0 0 40px rgba(255, 153, 0, 0.2);
}

@keyframes iconScaleIn {
  0% {
    opacity: 0;
    transform: scale(0.5);
  }

  60% {
    opacity: 1;
    transform: scale(1.08);
  }

  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* Ambient glow bloom behind icon */
.preloader-icon-glow {
  position: absolute;
  inset: -30px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 153, 0, 0.35) 0%, transparent 70%);
  filter: blur(20px);
  z-index: 1;
  animation: glowPulse 2s ease-in-out infinite;
}

@keyframes glowPulse {

  0%,
  100% {
    transform: scale(0.9);
    opacity: 0.6;
  }

  50% {
    transform: scale(1.1);
    opacity: 1;
  }
}

/* Expanding concentric ring waves */
.preloader-icon-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255, 153, 0, 0.4);
  z-index: 2;
  animation: ringExpand 2s ease-out infinite;
}

.ring-1 {
  width: 130px;
  height: 130px;
  animation-delay: 0s;
}

.ring-2 {
  width: 130px;
  height: 130px;
  animation-delay: 0.7s;
}

@keyframes ringExpand {
  0% {
    transform: scale(0.8);
    opacity: 0.8;
  }

  100% {
    transform: scale(2.2);
    opacity: 0;
  }
}

/* Preloader logo letter reveal */
.preloader-logo {
  font-family: 'Anton', sans-serif;
  font-size: 3.5rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  color: #fff;
  text-shadow: 0 0 30px rgba(255, 153, 0, 0.3);
  display: flex;
  gap: 0;
  overflow: visible;
}

.pl {
  display: inline-block;
  opacity: 0;
  transform: translateY(20px);
}

.preloader-tagline {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: 0.9rem;
  color: rgba(255, 153, 0, 0.6);
  letter-spacing: 0.1em;
  opacity: 0;
  animation: fadeInTag 0.6s ease 2s forwards;
}

@keyframes fadeInTag {
  to {
    opacity: 1;
  }
}

.loading-bar-container {
  width: 180px;
  height: 1.5px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
  border-radius: 2px;
}

.loading-bar {
  width: 30%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--orange-light), transparent);
  animation: loadSweep 1.4s infinite ease-in-out;
}

@keyframes loadSweep {
  0% {
    transform: translateX(-200%);
  }

  100% {
    transform: translateX(500%);
  }
}

/* ================================================
   HERO SECTION
================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 15vh 5vw 20vh 5vw;
  position: relative;
  text-align: center;
  overflow: hidden;
}

/* Floating note glyphs */
.float-note {
  position: absolute;
  font-size: 1.8rem;
  color: var(--orange-light);
  opacity: 0.15;
  animation: floatNote 8s ease-in-out infinite;
  pointer-events: none;
  z-index: 0;
  user-select: none;
}

@keyframes floatNote {

  0%,
  100% {
    transform: translateY(0) rotate(-5deg);
  }

  50% {
    transform: translateY(-20px) rotate(5deg);
  }
}

/* Music staff lines behind hero title */
.hero-staff {
  position: absolute;
  left: 5%;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 22px;
  pointer-events: none;
  z-index: 0;
}

.staff-line {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(255, 153, 0, 0.06) 15%, rgba(255, 153, 0, 0.06) 85%, transparent 100%);
}

.pill-badge {
  position: relative;
  z-index: 1;
  display: inline-block;
  padding: 0.5rem 1.2rem;
  border: 1px solid rgba(255, 153, 0, 0.2);
  border-radius: 50px;
  background: rgba(255, 153, 0, 0.05);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 600;
  color: rgba(255, 153, 0, 0.8);
  margin-bottom: 2rem;
  backdrop-filter: blur(10px);
}

.hero-title {
  position: relative;
  z-index: 1;
  font-family: 'Anton', sans-serif;
  font-weight: 400;
  font-size: clamp(4rem, 8vw, 7rem);
  line-height: 1.05;
  margin-bottom: 1.5rem;
  letter-spacing: 0.03em;
  max-width: 1300px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  color: var(--text-main);
  text-transform: uppercase;
  text-shadow: var(--text-shadow-hero);
}

.hero-title .highlight {
  color: var(--orange-light);
  text-shadow: 0 0 40px rgba(255, 153, 0, 0.5), 0 4px 20px rgba(255, 107, 0, 0.3);
}

.hero-title .highlight-red {
  color: #ff3b30;
  text-shadow: 0 0 30px rgba(255, 59, 48, 0.4);
}

.hero-subtitle {
  position: relative;
  z-index: 1;
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: 1.15rem;
  color: rgba(240, 237, 232, 0.55);
  font-weight: 400;
  max-width: 600px;
  line-height: 1.7;
  margin: 2rem auto 3.5rem auto;
  text-wrap: balance;
  text-align: center;
}

.hero-buttons {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 1.2rem;
  justify-content: center;
  align-items: center;
  pointer-events: auto;
  margin-bottom: 5rem;
}

/* User Reviews Marquee */
.user-reviews-wrapper {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 900px;
  overflow: hidden;
  margin: 0 auto;
  /* Soft fade at the edges */
  mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
}

.user-reviews-marquee {
  display: flex;
  gap: 1.5rem;
  width: max-content;
  animation: scrollMarquee 25s linear infinite;
  pointer-events: auto;
  will-change: transform;
  transform: translateZ(0);
}

.user-reviews-marquee:hover {
  animation-play-state: paused;
}

@keyframes scrollMarquee {
  0% {
    transform: translateX(0);
  }

  100% {
    transform: translateX(calc(-50% - 0.75rem));
  }
}

.review-card {
  width: 320px;
  background: var(--bg-glass);
  /* Reduced blur: 12px → 8px */
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  text-align: left;
  /* Only transition transform/opacity — not 'all' */
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 0.4s ease,
              border-color 0.4s ease;
  position: relative;
  overflow: hidden;
  pointer-events: auto;
  contain: layout style paint;
  backface-visibility: hidden;
}

/* Spotlight Effect for Cursor-Aware */
.review-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--cursor-x, 50%) var(--cursor-y, 50%), rgba(255, 153, 0, 0.12) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

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

.review-card:hover {
  transform: scale(1.05) translateY(-5px);
  background: var(--bg-glass-heavy);
  border-color: rgba(255, 153, 0, 0.3);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2), 0 0 20px rgba(255, 153, 0, 0.05);
  z-index: 2;
}

.review-card .stars {
  color: var(--orange-light);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  transition: transform 0.4s ease;
}

.review-card:hover .stars {
  transform: translateX(3px);
}

.review-card p {
  font-size: 0.95rem;
  color: var(--text-main);
  opacity: 0.9;
  line-height: 1.5;
  font-family: var(--font-body);
}

.review-card .reviewer {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
  font-family: 'Playfair Display', serif;
}

/* Mini piano strip at hero bottom */
.mini-piano-strip {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  height: 50px;
  border-radius: 0 0 6px 6px;
  overflow: visible;
  margin-top: 1rem;
}

.mini-key {
  position: relative;
  display: inline-block;
}

.mini-key.white {
  width: 20px;
  height: 50px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.03) 100%);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-top: none;
  border-radius: 0 0 3px 3px;
  margin-right: 1px;
  transition: background 0.15s ease;
}

.mini-key.white:hover {
  background: linear-gradient(180deg, rgba(255, 153, 0, 0.3) 0%, rgba(255, 153, 0, 0.1) 100%);
  border-color: rgba(255, 153, 0, 0.3);
}

.mini-key.black {
  width: 13px;
  height: 30px;
  background: rgba(255, 153, 0, 0.15);
  border: 1px solid rgba(255, 153, 0, 0.2);
  border-top: none;
  border-radius: 0 0 2px 2px;
  margin-left: -7px;
  margin-right: -6px;
  z-index: 2;
  transition: background 0.15s ease;
}

.mini-key.black:hover {
  background: rgba(255, 153, 0, 0.5);
}

/* ================================================
   CURSOR-AWARE ELEMENTS
================================================ */
.cursor-aware {
  position: relative;
  overflow: hidden;
}

.cursor-aware::before {
  content: '';
  position: absolute;
  top: var(--cursor-y, -100px);
  left: var(--cursor-x, -100px);
  width: 200px;
  height: 200px;
  background: radial-gradient(circle closest-side, rgba(255, 153, 0, 0.3), transparent);
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 0;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.cursor-aware:hover::before {
  opacity: 1;
}

/* ================================================
   BUTTONS
================================================ */
.app-store-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), filter 0.3s ease;
}

.app-store-badge img {
  height: 54px;
  width: auto;
}

.app-store-badge:hover {
  transform: scale(1.05);
  filter: brightness(1.1);
}

/* Write Review button */
.write-review-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.85rem 1.6rem;
  background: var(--bg-glass-heavy);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text-main);
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  font-family: var(--font-body);
  text-decoration: none;
  height: 54px;
  border: 1px solid var(--border-glass);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  letter-spacing: 0.03em;
}

.write-review-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 153, 0, 0.4);
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(255, 153, 0, 0.15);
}

.write-review-btn .material-symbols-outlined {
  font-size: 1.2rem;
  color: var(--orange-light);
}

.btn-secondary {
  position: relative;
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: #fff;
  padding: 1.1rem 2.4rem;
  border-radius: 14px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-secondary span {
  position: relative;
  z-index: 1;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.07);
  transform: translateY(-3px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
  border-color: rgba(255, 255, 255, 0.18);
}

.download-btn {
  background: linear-gradient(180deg, #FFA933, #FF6B00);
  color: #1a0f00;
  padding: 0.8rem 1.8rem;
  border-radius: 100px;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto;
  text-transform: uppercase;
  border: none;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.5), 0 6px 20px rgba(255, 107, 0, 0.3);
  text-decoration: none;
}

.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.6), 0 12px 24px rgba(255, 107, 0, 0.4);
  filter: brightness(1.05);
}

/* ================================================
   TRANSITION TITLE (Core Features)
================================================ */
.transition-title-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 0 1rem 0;
  /* Minimized padding */
  position: relative;
  z-index: 10;
  text-align: center;
  margin-bottom: -2rem;
  /* Pull next section up slightly */
}

.transition-title {
  font-family: 'Anton', sans-serif;
  font-size: clamp(3rem, 6vw, 4.5rem);
  letter-spacing: 0.05em;
  color: #fff;
  opacity: 1;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  /* Multi-layered High-end Glow */
  text-shadow:
    0 0 20px rgba(255, 255, 255, 0.2),
    0 0 40px rgba(255, 153, 0, 0.3),
    0 0 80px rgba(255, 107, 0, 0.2);
}

.transition-title .highlight {
  /* Ultra-saturated Glow for Highlight words */
  color: var(--orange-light);
  text-shadow:
    0 0 30px rgba(255, 153, 0, 0.8),
    0 0 60px rgba(255, 107, 0, 0.6),
    0 4px 20px rgba(255, 107, 0, 0.4);
}

.transition-line {
  width: 1px;
  height: 40px;
  /* Even shorter line for tighter gap */
  background: linear-gradient(180deg, var(--orange-light) 0%, transparent 100%);
  box-shadow: 0 0 15px rgba(255, 153, 0, 0.5);
  /* Glow on the line itself */
}

/* ================================================
   SHOWCASE AREA
================================================ */
.showcase-area {
  position: relative;
  height: 600vh;
  z-index: 10;
  contain: paint;
}

.sticky-frame {
  position: sticky;
  top: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  display: flex;
  align-items: center;
}

/* ================================================
   CSS IPHONE
================================================ */
.css-iphone {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) perspective(2000px) rotateY(5deg) rotateX(20deg);
  width: 380px;
  height: 800px;
  z-index: 50;
  /* will-change promotes to GPU layer — keep it */
  will-change: transform;
  transform-style: preserve-3d;
  backface-visibility: hidden;
  contain: layout style;
}

.device-frame {
  width: 100%;
  height: 100%;
  /* Natural Titanium Gradient */
  background: linear-gradient(135deg, #2c2c2e 0%, #3a3a3c 50%, #2c2c2e 100%);
  border-radius: 54px;
  position: absolute;
  top: 0;
  left: 0;
  border: 1.5px solid #5a5a5a;
  transform-style: preserve-3d;
  box-shadow:
    inset 0 0 2px rgba(255, 255, 255, 0.3),
    inset 0 0 20px rgba(0, 0, 0, 0.5);
  backface-visibility: hidden;
}

/* Metal Frame Edge highlights */
.device-frame::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 54px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  transform: translateZ(-2px);
  pointer-events: none;
}

/* Back Plate / Depth */
.device-frame::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 54px;
  /* Dark Titanium Depth */
  background: linear-gradient(135deg, #a7a7a7 0%, #7d7d7d 25%, #424242 60%, #1a1a1a 100%);
  border: 1px solid #8e8e8e;
  transform: translateZ(-24px);
  box-shadow:
    0 40px 100px rgba(0, 0, 0, 0.7),
    -20px 20px 60px rgba(0, 0, 0, 0.5);
}

/* PHYSICAL BUTTONS */
.btn-side {
  position: absolute;
  right: -3px;
  top: 180px;
  width: 4px;
  height: 100px;
  background: #3a3a3c;
  border: 1px solid #5a5a5a;
  border-radius: 0 4px 4px 0;
  transform: translateZ(-10px);
  box-shadow: 1px 0 3px rgba(0, 0, 0, 0.5);
}

.btn-side-group {
  position: absolute;
  left: -3px;
  top: 140px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transform: translateZ(-10px);
}

.btn-vol {
  width: 4px;
  background: #3a3a3c;
  border: 1px solid #5a5a5a;
  border-radius: 4px 0 0 4px;
  box-shadow: -1px 0 3px rgba(0, 0, 0, 0.5);
}

#btn-action {
  height: 35px;
  margin-bottom: 10px;
}

#btn-up,
#btn-down {
  height: 65px;
}

/* ANTENNA BANDS */
.antenna-band {
  position: absolute;
  width: 100%;
  height: 4px;
  background: rgba(0, 0, 0, 0.3);
  z-index: 5;
  transform: translateZ(-5px);
}

.band-top {
  top: 60px;
}

.band-bottom {
  bottom: 60px;
}

.screen {
  position: absolute;
  top: 8px;
  left: 8px;
  right: 8px;
  bottom: 8px;
  background: #000;
  border-radius: 42px;
  overflow: hidden;
  box-shadow:
    inset 0 0 20px rgba(0, 0, 0, 1),
    0 0 0 2px rgba(0, 0, 0, 0.8);
  transform: translateZ(2px);
  z-index: 10;
}

.screen-glare {
  position: absolute;
  top: -100%;
  left: -100%;
  width: 300%;
  height: 300%;
  background: linear-gradient(135deg,
      rgba(255, 255, 255, 0) 0%,
      rgba(255, 255, 255, 0) 45%,
      rgba(255, 255, 255, 0.07) 50%,
      rgba(255, 255, 255, 0) 55%,
      rgba(255, 255, 255, 0) 100%);
  z-index: 20;
  pointer-events: none;
  /* Removed mix-blend-mode: screen — breaks compositing on the phone layer */
  animation: glareMove 14s infinite alternate ease-in-out;
  will-change: transform;
}

@keyframes glareMove {
  0% {
    transform: translate(-10%, -10%);
  }

  100% {
    transform: translate(10%, 10%);
  }
}

.app-screen {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.5s ease-in-out;
  display: block;
  backface-visibility: hidden;
}

.dynamic-island {
  position: absolute;
  top: 22px;
  left: 50%;
  transform: translateX(-50%) translateZ(2px);
  width: 125px;
  height: 35px;
  background: #030303;
  border-radius: 20px;
  z-index: 100;
  box-shadow: inset 0 0 4px rgba(255, 255, 255, 0.05);
}

.phone-glow {
  display: none;
}

/* ================================================
   EDITORIAL FEATURE CARDS — Sheet Music Texture
================================================ */
.editorial-container {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 35vw;
  opacity: 0;
  pointer-events: auto;
  will-change: opacity, transform;

  background: var(--bg-glass);
  /* Reduced backdrop blur: 24px → 14px */
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: 28px;
  padding: 3rem;
  box-shadow:
    0 30px 60px rgba(0, 0, 0, 0.18),
    inset 0 1px 1px var(--border-glass);
  text-align: left !important;
  overflow: hidden;
  contain: layout style paint;
  backface-visibility: hidden;

  /* Sheet music texture */
  background-image:
    repeating-linear-gradient(180deg,
      transparent 0px,
      transparent 26px,
      var(--border-glass) 26px,
      var(--border-glass) 27px);
}

/* Glare sweep on card hover */
.editorial-container::after {
  content: '';
  position: absolute;
  top: -150%;
  left: -150%;
  width: 200%;
  height: 200%;
  background: linear-gradient(to bottom right,
      rgba(255, 255, 255, 0) 0%,
      rgba(255, 255, 255, 0) 40%,
      rgba(255, 255, 255, 0.04) 50%,
      rgba(255, 255, 255, 0) 60%,
      rgba(255, 255, 255, 0) 100%);
  transform: rotate(30deg);
  transition: transform 0.9s ease;
  pointer-events: none;
  z-index: 1;
}

.editorial-container:hover::after {
  transform: rotate(30deg) translate(50%, 50%);
}

/* Subtle orange left-border accent on hover */
.editorial-container::before {
  content: '';
  position: absolute;
  top: 2rem;
  bottom: 2rem;
  left: 0;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--orange-light), transparent);
  border-radius: 2px;
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 3;
}

.editorial-container:hover::before {
  opacity: 0.6;
}

.editorial-container>* {
  position: relative;
  z-index: 2;
}

.text-left {
  left: 10vw;
}

.text-right {
  right: 10vw;
}

.feature-icon {
  font-size: 2.2rem;
  color: var(--orange-light);
  margin-bottom: 1.2rem;
  display: block;
  filter: drop-shadow(0 0 8px rgba(255, 153, 0, 0.4));
}

.editorial-container h2 {
  font-family: 'Anton', sans-serif;
  font-size: 2.2rem;
  font-weight: 400;
  margin-bottom: 1rem;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-main);
}

.editorial-container p {
  font-family: 'Playfair Display', serif;
  font-style: italic;
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: 400;
  line-height: 1.7;
}

/* ================================================
   FOOTER CTA
================================================ */
.footer-cta {
  height: 80vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  background: transparent;
  position: relative;
  overflow: hidden;
}

.glass-card {
  background: var(--bg-glass);
  /* Reduced from 24px → 14px */
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: 36px;
  padding: 5rem 4rem 3rem;
  position: relative;
  overflow: hidden;
  width: 90%;
  max-width: 700px;
  contain: layout style paint;
}

.cta-note-decoration {
  font-size: 4rem;
  color: var(--orange-light);
  opacity: 0.12;
  position: absolute;
  top: 1.5rem;
  right: 2.5rem;
  line-height: 1;
  animation: floatNote 6s ease-in-out infinite;
  pointer-events: none;
}

/* PIANO KEYS ROW in footer */
.piano-keys-row {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  height: 80px;
  margin-top: 3rem;
  position: relative;
}

.pk {
  position: relative;
  display: inline-block;
  transition: background 0.12s ease, transform 0.12s ease;
}

.pk.white {
  width: 36px;
  height: 80px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.09) 0%, rgba(255, 255, 255, 0.04) 100%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-top: 2px solid rgba(255, 255, 255, 0.15);
  border-radius: 0 0 5px 5px;
  margin-right: 2px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.pk.white:hover {
  background: linear-gradient(180deg, rgba(255, 153, 0, 0.4) 0%, rgba(255, 153, 0, 0.15) 100%);
  border-color: rgba(255, 153, 0, 0.4);
  transform: translateY(3px) scaleY(0.97);
  box-shadow: 0 0 20px rgba(255, 153, 0, 0.3);
}

.pk.black {
  width: 24px;
  height: 50px;
  background: linear-gradient(180deg, rgba(255, 153, 0, 0.18) 0%, rgba(255, 153, 0, 0.08) 100%);
  border: 1px solid rgba(255, 153, 0, 0.25);
  border-top: 2px solid rgba(255, 153, 0, 0.3);
  border-radius: 0 0 3px 3px;
  margin-left: -13px;
  margin-right: -11px;
  z-index: 2;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
}

.pk.black:hover {
  background: rgba(255, 153, 0, 0.6);
  border-color: var(--orange-light);
  transform: translateY(3px);
  box-shadow: 0 0 15px rgba(255, 153, 0, 0.5);
}

/* ================================================
   FOOTER BOTTOM
================================================ */
.footer-bottom {
  border-top: 1px solid rgba(255, 102, 0, 0.08);
  padding: 3rem 2rem;
  background: transparent;
  /* Removed backdrop-filter from footer — not visible enough to justify cost */
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.3s;
  display: inline-block;
}

.footer-links a:hover {
  color: #fff;
}

.copyright {
  color: #334455;
  font-size: 0.8rem;
  margin-top: 0.5rem;
  font-family: 'Playfair Display', serif;
  font-style: italic;
}

/* ================================================
   RESPONSIVE
================================================ */
@media (max-width: 1024px) {
  .editorial-container {
    width: 45vw;
  }

  .editorial-container h2 {
    font-size: 1.8rem;
  }
}

@media (max-width: 768px) {
  .navbar {
    top: 1rem;
    padding: 0 1rem;
  }

  .nav-inner {
    padding: 0.55rem 0.55rem 0.55rem 1rem;
    border-radius: 28px;
  }

  .logo {
    font-size: 1rem;
    white-space: nowrap;
  }

  .nav-links {
    display: none;
  }

  .nav-right {
    gap: 0.55rem;
  }

  .mobile-menu-toggle {
    display: inline-flex;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid var(--border-glass);
    background: var(--bg-glass);
    color: var(--text-main);
  }

  .mobile-menu-card {
    position: fixed;
    top: 5.25rem;
    left: 1rem;
    right: 1rem;
    z-index: 120;
    display: grid;
    gap: 0.6rem;
    padding: 1rem;
    border-radius: 22px;
    border: 1px solid var(--border-glass);
    background: rgba(10, 10, 10, 0.96);
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.32);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.22s ease, transform 0.22s ease;
  }

  .mobile-menu-card a {
    display: block;
    text-decoration: none;
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 0.9rem 1rem;
    font-size: 0.95rem;
    font-weight: 600;
  }

  .mobile-menu-card .mobile-menu-cta {
    background: linear-gradient(180deg, #FFA933, #FF6B00);
    color: #1a0f00;
    border-color: transparent;
  }

  body.mobile-menu-open .mobile-menu-card {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  /* On mobile, reduce blur even further for GPU performance */
  .nav-inner,
  .review-card,
  .editorial-container,
  .glass-card {
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }

  /* Hide aurora orbs on mobile entirely */
  .aurora-2, .aurora-3 {
    display: none;
  }

  /* Reduce canvas opacity on mobile */
  #bg-canvas {
    opacity: 0.15;
  }

  .hero-title {
    font-size: clamp(3rem, 11vw, 5rem);
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .float-note {
    display: none;
  }

  .mini-piano-strip {
    display: none;
  }

  .editorial-container {
    width: 90vw;
    left: 5vw !important;
    right: auto !important;
    text-align: center;
    top: 15%;
    transform: translateY(0);
  }

  .piano-keys-row {
    overflow-x: auto;
  }

  .glass-card {
    padding: 3rem 1.5rem 2rem;
  }
}

/* ================================================
   PERFORMANCE — content-visibility & GPU layers
================================================ */

/* Skip rendering cost for sections not yet in viewport */
.showcase-area,
.footer-cta,
.footer-bottom {
  content-visibility: auto;
  /* Hint the browser to reserve space so no layout shift */
  contain-intrinsic-size: 0 500px;
}

/* Isolate the hero from the rest of the page paint tree */
.hero {
  contain: layout style;
}

/* Isolate the transition title block */
.transition-title-container {
  contain: layout style;
}

/* Ensure marquee never causes layout of parent */
.user-reviews-wrapper {
  contain: layout style;
}

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

  .ambient-background,
  .float-note,
  .aurora-2,
  .aurora-3,
  .screen-glare,
  .logo-note,
  .user-reviews-marquee,
  .cta-note-decoration {
    animation: none !important;
  }

  #bg-canvas {
    display: none;
  }
}

/* ================================================
   PERFORMANCE — Low-power device hints
================================================ */
@media (max-width: 480px) {
  /* Kill ALL backdrop-filters on very small screens */
  .nav-inner,
  .review-card,
  .editorial-container,
  .glass-card,
  .write-review-btn {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    background: rgba(10, 10, 10, 0.92) !important;
  }

  .ambient-smudge-left,
  .aurora-2,
  .aurora-3 {
    display: none;
  }

  #bg-canvas {
    display: none;
  }

  .float-note {
    display: none;
  }

  .mobile-menu-card {
    top: 5rem;
    left: 0.75rem;
    right: 0.75rem;
    padding: 0.85rem;
  }

  .mobile-menu-card a {
    padding: 0.82rem 0.9rem;
    font-size: 0.9rem;
  }
}