/* ═══════════════════════════════════════════════════
   Null Music — Premium Marketing Website
   Design System & Complete Styles
   Inspired by Apple Music (apple.com/apple-music)
   ═══════════════════════════════════════════════════ */

/* ─── DESIGN TOKENS ─── */
:root {
  /* Colors */
  --c-red: #FA233B;
  --c-red-dark: #D91B32;
  --c-magenta: #E040A0;
  --c-coral: #FF6B3D;
  --c-black: #000000;
  --c-white: #FFFFFF;
  --c-grey-100: #F5F5F7;
  --c-grey-200: #E8E8ED;
  --c-grey-400: #86868B;
  --c-grey-600: #424245;
  --c-grey-900: #1D1D1F;

  /* Typography */
  --ff: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --fw-light: 300;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-black: 900;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 10rem;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 56px;

  /* Effects */
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 100px;
  --shadow-card: 0 4px 40px rgba(0, 0, 0, 0.08);
  --shadow-heavy: 0 16px 64px rgba(0, 0, 0, 0.2);
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-fast: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--ff);
  color: var(--c-grey-900);
  background: var(--c-white);
  overflow-x: hidden;
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: var(--ff);
}

/* ─── UTILITY ─── */
.section-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  text-align: center;
}

.section-eyebrow {
  font-size: 1rem;
  font-weight: var(--fw-semibold);
  color: var(--c-red);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.section-title {
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: var(--fw-black);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
  color: var(--c-grey-900);
}

.section-desc {
  font-size: 1.15rem;
  color: var(--c-grey-400);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ─── REVEAL ANIMATION ─── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════════════════════════════════════════════
   NAVBAR
   ═══════════════════════════════════════════════════ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: var(--fw-bold);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--c-grey-900);
  transition: opacity var(--transition-fast);
}

.nav-logo:hover {
  opacity: 0.7;
}

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: #2d3142;
  color: #F08A00;
  border-radius: 7px;
  font-size: 0.95rem;
  font-weight: var(--fw-black);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: var(--space-lg);
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: var(--fw-medium);
  color: var(--c-grey-600);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--c-red);
  border-radius: 1px;
  transition: width var(--transition);
}

.nav-links a:hover {
  color: var(--c-red);
}

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

.nav-cta {
  font-size: 0.8rem;
  font-weight: var(--fw-semibold);
  background: var(--c-red);
  color: var(--c-white);
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-pill);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.nav-cta:hover {
  background: var(--c-red-dark);
  transform: scale(1.04);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-grey-900);
  border-radius: 2px;
  transition: var(--transition-fast);
}

/* ═══════════════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: var(--nav-height);
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
      #FA233B 0%,
      #E8276C 25%,
      #D42E8E 50%,
      #FF4757 75%,
      #FF6B3D 100%);
  background-size: 300% 300%;
  animation: heroGradient 12s ease infinite;
}

@keyframes heroGradient {
  0% {
    background-position: 0% 50%;
  }

  25% {
    background-position: 50% 0%;
  }

  50% {
    background-position: 100% 50%;
  }

  75% {
    background-position: 50% 100%;
  }

  100% {
    background-position: 0% 50%;
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--c-white);
  padding: var(--space-lg);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 0.45rem 1.2rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.04em;
  margin-bottom: var(--space-lg);
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: fadeInDown 1s ease both;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 7.5rem);
  font-weight: var(--fw-black);
  line-height: 1.0;
  letter-spacing: -0.04em;
  margin-bottom: var(--space-md);
  animation: fadeInUp 1s 0.2s ease both;
  text-shadow: 0 2px 40px rgba(0, 0, 0, 0.15);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.35rem);
  font-weight: var(--fw-light);
  opacity: 0.88;
  line-height: 1.7;
  max-width: 600px;
  margin: 0 auto var(--space-lg);
  animation: fadeInUp 1s 0.4s ease both;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--c-white);
  color: var(--c-grey-900);
  font-size: 1.1rem;
  font-weight: var(--fw-semibold);
  padding: 1rem 2.4rem;
  border-radius: var(--radius-pill);
  transition: transform var(--transition), box-shadow var(--transition);
  animation: fadeInUp 1s 0.6s ease both;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

.hero-cta:hover {
  transform: scale(1.06);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.25);
}

.cta-icon {
  font-size: 0.85rem;
}

/* Interactive particle canvas */
.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  /* clicks pass through to content */
}

/* Mouse-follow radial glow */
.hero-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.12) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.hero:hover .hero-glow {
  opacity: 1;
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  animation: fadeInUp 1s 1s ease both;
}

.scroll-arrow {
  width: 28px;
  height: 28px;
  border-right: 2px solid rgba(255, 255, 255, 0.6);
  border-bottom: 2px solid rgba(255, 255, 255, 0.6);
  transform: rotate(45deg);
  animation: scrollBounce 2s ease infinite;
}

@keyframes scrollBounce {

  0%,
  100% {
    transform: rotate(45deg) translateY(0);
    opacity: 0.6;
  }

  50% {
    transform: rotate(45deg) translateY(10px);
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ═══════════════════════════════════════════════════
   FEATURES
   ═══════════════════════════════════════════════════ */
.features {
  padding: var(--space-3xl) 0;
  background: var(--c-white);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  max-width: var(--max-width);
  margin: var(--space-xl) auto 0;
  padding: 0 var(--space-md);
}

.feature-card {
  background: var(--c-grey-100);
  border-radius: var(--radius);
  padding: var(--space-lg);
  text-align: left;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent, var(--c-red)), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
}

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

.feature-icon-wrap {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent, var(--c-red)), color-mix(in srgb, var(--accent, var(--c-red)) 70%, white));
  color: var(--c-white);
  margin-bottom: var(--space-md);
}

.feature-icon {
  width: 26px;
  height: 26px;
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: var(--fw-bold);
  margin-bottom: var(--space-xs);
  color: var(--c-grey-900);
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--c-grey-400);
  line-height: 1.65;
}

/* ═══════════════════════════════════════════════════
   LISTENING EXPERIENCE — Animated "Video" Layers
   ═══════════════════════════════════════════════════ */
.listening {
  position: relative;
  min-height: 100vh;
  background: var(--c-black);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* ── Animated multi-layer background (simulates a video) ── */
.video-container {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.video-layer {
  position: absolute;
  inset: -20%;
  /* oversize so zoom/pan doesn't show edges */
  background-size: cover;
  background-position: center;
  will-change: transform, opacity;
}

.video-layer.vl-1 {
  animation: vidZoomSlow 18s ease-in-out infinite alternate;
  opacity: 0.6;
}

.video-layer.vl-2 {
  animation: vidPanRight 22s linear infinite alternate;
  opacity: 0;
  animation-name: vidPanRight, vidFade2;
  animation-duration: 22s, 12s;
  animation-timing-function: linear, ease-in-out;
  animation-iteration-count: infinite, infinite;
  animation-direction: alternate, alternate;
  filter: hue-rotate(15deg) brightness(0.8);
}

.video-layer.vl-3 {
  animation: vidZoomFast 14s ease-in-out infinite alternate-reverse;
  opacity: 0;
  animation-name: vidZoomFast, vidFade3;
  animation-duration: 14s, 16s;
  animation-timing-function: ease-in-out, ease-in-out;
  animation-iteration-count: infinite, infinite;
  animation-direction: alternate-reverse, alternate;
  filter: saturate(1.4) brightness(0.7);
}

.video-layer.vl-4 {
  animation: vidPanLeft 20s linear infinite alternate;
  opacity: 0;
  animation-name: vidPanLeft, vidFade4;
  animation-duration: 20s, 10s;
  animation-timing-function: linear, ease-in-out;
  animation-iteration-count: infinite, infinite;
  animation-direction: alternate, alternate;
  filter: hue-rotate(-20deg) contrast(1.2);
}

/* Layer is "paused" when the class is toggled */
.video-container.paused .video-layer {
  animation-play-state: paused !important;
}

@keyframes vidZoomSlow {
  0% {
    transform: scale(1) translate(0, 0);
  }

  100% {
    transform: scale(1.15) translate(-2%, 3%);
  }
}

@keyframes vidPanRight {
  0% {
    transform: scale(1.1) translate(-5%, 0);
  }

  100% {
    transform: scale(1.1) translate(5%, 2%);
  }
}

@keyframes vidZoomFast {
  0% {
    transform: scale(1.2) translate(3%, -2%);
  }

  100% {
    transform: scale(1) translate(-3%, 2%);
  }
}

@keyframes vidPanLeft {
  0% {
    transform: scale(1.08) translate(4%, 1%);
  }

  100% {
    transform: scale(1.12) translate(-4%, -1%);
  }
}

@keyframes vidFade2 {

  0%,
  30% {
    opacity: 0;
  }

  40%,
  70% {
    opacity: 0.45;
  }

  80%,
  100% {
    opacity: 0;
  }
}

@keyframes vidFade3 {

  0%,
  20% {
    opacity: 0;
  }

  35%,
  65% {
    opacity: 0.5;
  }

  75%,
  100% {
    opacity: 0;
  }
}

@keyframes vidFade4 {

  0%,
  40% {
    opacity: 0;
  }

  55%,
  85% {
    opacity: 0.4;
  }

  95%,
  100% {
    opacity: 0;
  }
}

/* Gradient overlay so text stays legible */
.listening::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.3) 0%, rgba(0, 0, 0, 0.1) 40%, rgba(0, 0, 0, 0.5) 100%);
  pointer-events: none;
  transition: background 0.8s ease;
}

/* ── STATE 1: Video overlay (title text) ── */
.ls-state-video {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--c-white);
  padding: var(--space-xl) var(--space-md);
  max-width: 800px;
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.listening .section-eyebrow {
  color: var(--c-grey-400);
}

.listening-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: var(--fw-black);
  line-height: 1.06;
  letter-spacing: -0.035em;
  margin-bottom: var(--space-md);
}

/* ── STATE 2: Detail panel (hidden, slides in on expand) ── */
.ls-state-detail {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl) var(--space-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(40px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.7s cubic-bezier(0.4, 0, 0.2, 1),
    visibility 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.detail-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
  max-width: 960px;
  width: 100%;
}

.detail-text {
  font-size: 1.1rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.75);
}

.detail-text strong {
  font-weight: var(--fw-bold);
}

.detail-phone-container {
  display: flex;
  justify-content: center;
}

.detail-phone-frame {
  width: 260px;
  height: 540px;
  border-radius: 38px;
  overflow: hidden;
  background: #000;
  box-shadow: 0 20px 80px rgba(0, 0, 0, 0.5), 0 0 0 4px rgba(255, 255, 255, 0.06);
  transform: scale(0.88);
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.detail-phone-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ── EXPANDED CLASS (toggled by JS) ── */
.listening.expanded .ls-state-video {
  opacity: 0;
  transform: translateY(-30px);
  pointer-events: none;
}

.listening.expanded .ls-state-detail {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.listening.expanded .detail-phone-frame {
  transform: scale(1);
}

.listening.expanded::after {
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.65) 50%, rgba(0, 0, 0, 0.8) 100%);
}

.listening.expanded .video-container {
  filter: blur(4px) brightness(0.5);
  transition: filter 0.8s ease;
}

.video-container {
  transition: filter 0.8s ease;
}

/* ── Apple-style video controls (bottom-right) ── */
.video-controls {
  position: absolute;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: 3;
  display: flex;
  gap: 10px;
}

.vc-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: var(--c-white);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.vc-btn:hover {
  background: rgba(255, 255, 255, 0.32);
  transform: scale(1.12);
}

@media (max-width: 768px) {
  .detail-split {
    grid-template-columns: 1fr;
    gap: var(--space-md);
    text-align: center;
  }

  .detail-phone-frame {
    width: 200px;
    height: 420px;
    border-radius: 28px;
  }

  .ls-state-detail {
    padding: var(--space-md);
  }

  .video-controls {
    bottom: var(--space-sm);
    right: var(--space-sm);
  }
}

/* ═══════════════════════════════════════════════════
   MUSIC DISCOVERY
   ═══════════════════════════════════════════════════ */
.discovery {
  position: relative;
  min-height: 100vh;
  background: var(--c-grey-100);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: var(--space-3xl) var(--space-md);
}

.discovery-covers {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.float-cover {
  position: absolute;
  border-radius: var(--radius);
  box-shadow: var(--shadow-heavy);
  object-fit: cover;
  transition: transform 0.1s linear;
}

.fc-1 {
  width: 160px;
  height: 160px;
  top: 8%;
  left: 5%;
  transform: rotate(-6deg);
}

.fc-2 {
  width: 140px;
  height: 140px;
  top: 15%;
  right: 8%;
  transform: rotate(4deg);
}

.fc-3 {
  width: 120px;
  height: 120px;
  bottom: 18%;
  left: 10%;
  transform: rotate(3deg);
}

.fc-4 {
  width: 150px;
  height: 150px;
  bottom: 12%;
  right: 5%;
  transform: rotate(-5deg);
}

.fc-5 {
  width: 100px;
  height: 100px;
  top: 45%;
  left: 2%;
  transform: rotate(8deg);
}

.fc-6 {
  width: 130px;
  height: 130px;
  top: 5%;
  left: 35%;
  transform: rotate(-3deg);
}

.fc-7 {
  width: 110px;
  height: 110px;
  bottom: 8%;
  left: 38%;
  transform: rotate(6deg);
}

.fc-8 {
  width: 135px;
  height: 135px;
  top: 40%;
  right: 3%;
  transform: rotate(-7deg);
}

.discovery-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 700px;
}

.discovery-title {
  font-size: clamp(2.5rem, 6vw, 5.5rem);
  font-weight: var(--fw-black);
  line-height: 1.06;
  letter-spacing: -0.035em;
  margin-bottom: var(--space-md);
  background: linear-gradient(135deg, var(--c-red) 0%, var(--c-magenta) 50%, var(--c-coral) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.discovery-desc {
  font-size: 1.1rem;
  color: var(--c-grey-400);
  line-height: 1.7;
  max-width: 540px;
  margin: 0 auto;
}

/* ═══════════════════════════════════════════════════
   MUSIC DNA
   ═══════════════════════════════════════════════════ */
.music-dna {
  position: relative;
  padding: var(--space-3xl) var(--space-md);
  background: linear-gradient(145deg, #0a0a0a 0%, #1a0a14 50%, #0a0a0a 100%);
  overflow: hidden;
  text-align: center;
}

.dna-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.dna-strand {
  position: absolute;
  width: 200%;
  height: 100%;
  top: 0;
  left: -50%;
}

.dna-strand-1 {
  background: repeating-linear-gradient(90deg,
      transparent,
      transparent 40px,
      rgba(250, 35, 59, 0.06) 40px,
      rgba(250, 35, 59, 0.06) 42px);
  animation: dnaScroll 20s linear infinite;
}

.dna-strand-2 {
  background: repeating-linear-gradient(90deg,
      transparent,
      transparent 60px,
      rgba(236, 72, 153, 0.04) 60px,
      rgba(236, 72, 153, 0.04) 62px);
  animation: dnaScroll 30s linear infinite reverse;
}

@keyframes dnaScroll {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(50%);
  }
}

.dna-content {
  position: relative;
  z-index: 1;
}

.dna-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: var(--fw-black);
  color: var(--c-white);
  margin-bottom: var(--space-xs);
  background: linear-gradient(135deg, #FA233B, #EC4899, #A855F7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.dna-subtitle {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: var(--space-xl);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.dna-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  max-width: 900px;
  margin: 0 auto;
}

.dna-feature {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: var(--space-lg) var(--space-md);
  transition: transform var(--transition), background var(--transition);
}

.dna-feature:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.08);
}

.dna-feat-icon {
  font-size: 2.2rem;
  margin-bottom: var(--space-sm);
}

.dna-feature h3 {
  font-size: 1rem;
  font-weight: var(--fw-bold);
  color: var(--c-white);
  margin-bottom: var(--space-xs);
}

.dna-feature p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.45);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .dna-features {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.dna-action {
  margin-top: var(--space-2xl);
  text-align: center;
}

.dna-btn {
  background: transparent;
  color: var(--c-white);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 0.8rem 2rem;
  border-radius: var(--radius-pill);
  font-size: 1rem;
  font-weight: var(--fw-semibold);
  cursor: pointer;
  transition: all var(--transition);
}

.dna-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.4);
}

.dna-screens-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  max-width: 1100px;
  margin: 0 auto;
  padding-top: var(--space-2xl);
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.8s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.8s ease;
}

.dna-screens-container.expanded {
  max-height: 1200px;
  opacity: 1;
}

.dna-screen-wrap .phone-frame {
  margin: 0 auto;
}

@media (max-width: 900px) {
  .dna-screens-container {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .dna-screens-container.expanded {
    max-height: 2500px;
  }
}

/* ═══════════════════════════════════════════════════
   RADIO STATIONS
   ═══════════════════════════════════════════════════ */
.radio {
  padding: var(--space-3xl) 0 var(--space-2xl);
  background: var(--c-white);
  overflow: hidden;
}

.radio-carousel {
  margin-top: var(--space-xl);
  overflow: hidden;
  position: relative;
  cursor: grab;
}

.radio-carousel:active {
  cursor: grabbing;
}

.radio-track {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
}

.radio-card {
  flex: 0 0 240px;
  height: 160px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--g1), var(--g2));
  color: var(--c-white);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-md);
  transition: transform var(--transition), box-shadow var(--transition);
  user-select: none;
  position: relative;
  overflow: hidden;
}

.radio-card::before {
  content: 'N';
  position: absolute;
  top: -15px;
  right: -10px;
  font-size: 6rem;
  opacity: 0.12;
  transform: rotate(15deg);
}

.radio-card:hover {
  transform: translateY(-6px) scale(1.03);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.radio-name {
  font-size: 1.15rem;
  font-weight: var(--fw-bold);
  margin-bottom: 2px;
}

.radio-sub {
  font-size: 0.8rem;
  opacity: 0.8;
  font-weight: var(--fw-light);
}

/* ═══════════════════════════════════════════════════
   APP SCREENSHOTS
   ═══════════════════════════════════════════════════ */
.screenshots {
  padding: var(--space-3xl) 0;
  background: var(--c-grey-100);
  overflow: hidden;
}

.screenshot-carousel {
  margin-top: var(--space-xl);
  position: relative;
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 15%, black 85%, transparent 100%);
  mask-image: linear-gradient(to right, transparent 0%, black 15%, black 85%, transparent 100%);
}

.screenshot-track {
  display: flex;
  justify-content: flex-start;
  gap: var(--space-lg);
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  padding: var(--space-lg) 0;
}

/* ── Active slide: scales up ── */
.screenshot-slide {
  flex: 0 0 auto;
  text-align: center;
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    opacity 0.5s ease;
  transform: scale(1);
  opacity: 1;
}

/* ── Inactive slides: scaled down, dimmed ── */
.screenshot-slide.inactive {
  transform: scale(0.85);
  opacity: 0.3;
}

.phone-frame {
  width: 260px;
  height: 540px;
  border-radius: 36px;
  overflow: hidden;
  background: var(--c-black);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25), 0 0 0 4px rgba(0, 0, 0, 0.1);
  position: relative;
  transition: box-shadow 0.5s ease;
}

.phone-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.slide-label {
  display: inline-block;
  margin-top: var(--space-sm);
  font-size: 0.9rem;
  font-weight: var(--fw-semibold);
  color: var(--c-grey-400);
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.carousel-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--c-white);
  color: var(--c-grey-900);
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.carousel-btn:hover {
  background: var(--c-grey-900);
  color: var(--c-white);
  transform: scale(1.1);
}

.carousel-dots {
  display: flex;
  gap: 8px;
}

.carousel-dots .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-grey-200);
  transition: background var(--transition-fast), transform var(--transition-fast);
  cursor: pointer;
}

.carousel-dots .dot.active {
  background: var(--c-red);
  transform: scale(1.25);
}

/* ═══════════════════════════════════════════════════
   DOWNLOAD CTA
   ═══════════════════════════════════════════════════ */
.download {
  position: relative;
  padding: var(--space-3xl) var(--space-md);
  background: var(--c-black);
  color: var(--c-white);
  text-align: center;
  overflow: hidden;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.download-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, #0a0a0a 0%, #1a0a12 50%, #0a0a0a 100%);
}

.eq-bars {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 100%;
  z-index: 1;
  opacity: 0.06;
}

.eq-bars span {
  width: 60px;
  background: linear-gradient(0deg, var(--c-red), var(--c-magenta));
  border-radius: 4px 4px 0 0;
  animation: eqBounce var(--dur, 1.2s) ease-in-out infinite alternate;
}

.eq-bars span:nth-child(1) {
  --dur: 1.1s;
  height: 30%;
}

.eq-bars span:nth-child(2) {
  --dur: 0.9s;
  height: 50%;
  animation-delay: 0.1s;
}

.eq-bars span:nth-child(3) {
  --dur: 1.3s;
  height: 70%;
  animation-delay: 0.2s;
}

.eq-bars span:nth-child(4) {
  --dur: 0.8s;
  height: 45%;
  animation-delay: 0.3s;
}

.eq-bars span:nth-child(5) {
  --dur: 1.0s;
  height: 60%;
  animation-delay: 0.15s;
}

.eq-bars span:nth-child(6) {
  --dur: 1.2s;
  height: 35%;
  animation-delay: 0.25s;
}

.eq-bars span:nth-child(7) {
  --dur: 0.85s;
  height: 55%;
  animation-delay: 0.05s;
}

.eq-bars span:nth-child(8) {
  --dur: 1.15s;
  height: 40%;
  animation-delay: 0.35s;
}

.eq-bars span:nth-child(9) {
  --dur: 0.95s;
  height: 65%;
  animation-delay: 0.2s;
}

.eq-bars span:nth-child(10) {
  --dur: 1.25s;
  height: 25%;
  animation-delay: 0.1s;
}

@keyframes eqBounce {
  0% {
    transform: scaleY(0.4);
  }

  100% {
    transform: scaleY(1);
  }
}

.download-content {
  position: relative;
  z-index: 2;
}

.download-title {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: var(--fw-black);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
}

.download-desc {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-xl);
}

.download-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

.dl-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 1rem 2rem;
  border-radius: var(--radius-pill);
  font-size: 1rem;
  font-weight: var(--fw-semibold);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition-fast);
}

.dl-btn.primary {
  background: var(--c-red);
  color: var(--c-white);
  box-shadow: 0 4px 30px rgba(250, 35, 59, 0.35);
}

.dl-btn.primary:hover {
  transform: scale(1.06);
  box-shadow: 0 8px 40px rgba(250, 35, 59, 0.5);
}

.dl-btn.secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--c-white);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.dl-btn.secondary:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: scale(1.06);
}

/* ═══════════════════════════════════════════════════
   SUPPORT / DONATE
   ═══════════════════════════════════════════════════ */
.support {
  padding: var(--space-3xl) var(--space-md);
  background: linear-gradient(180deg, var(--c-white) 0%, #fff5f6 50%, var(--c-white) 100%);
  text-align: center;
}

.support-content {
  max-width: 760px;
  margin: 0 auto;
}

.support-heart {
  font-size: 3rem;
  animation: heartPulse 1.5s ease-in-out infinite;
  display: inline-block;
  margin-bottom: var(--space-sm);
}

@keyframes heartPulse {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.18);
  }
}

.support-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--fw-black);
  color: var(--c-grey-900);
  margin-bottom: var(--space-xs);
}

.support-desc {
  font-size: 1.1rem;
  color: var(--c-grey-400);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

.support-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  max-width: 600px;
  margin: 0 auto;
}

.support-card {
  background: var(--c-white);
  border-radius: var(--radius);
  padding: var(--space-lg);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}

.support-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(250, 35, 59, 0.1);
}

.support-card-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(250, 35, 59, 0.08), rgba(212, 46, 142, 0.08));
  color: var(--c-red);
}

.support-card h3 {
  font-size: 1.15rem;
  font-weight: var(--fw-bold);
  color: var(--c-grey-900);
  margin-bottom: var(--space-sm);
}

/* UPI Box */
.upi-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--c-grey-100);
  border-radius: 10px;
  padding: 0.6rem 0.8rem;
  justify-content: center;
}

.upi-box code {
  font-family: 'Inter', monospace;
  font-size: 0.85rem;
  font-weight: var(--fw-semibold);
  color: var(--c-grey-900);
  letter-spacing: 0.01em;
}

.copy-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--c-white);
  border: 1px solid rgba(0, 0, 0, 0.08);
  color: var(--c-grey-400);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
  flex-shrink: 0;
}

.copy-btn:hover {
  color: var(--c-red);
  background: rgba(250, 35, 59, 0.06);
  transform: scale(1.1);
}

.copy-toast {
  display: inline-block;
  margin-top: var(--space-xs);
  font-size: 0.78rem;
  font-weight: var(--fw-semibold);
  color: var(--c-red);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.copy-toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* QR placeholder */
.qr-placeholder {
  width: 140px;
  height: 140px;
  margin: 0 auto;
  background: var(--c-white);
  border: 2px dashed rgba(0, 0, 0, 0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.qr-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

@media (max-width: 600px) {
  .support-options {
    grid-template-columns: 1fr;
  }
}

/* ═══════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════ */
.footer {
  background: var(--c-black);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: var(--space-xl) var(--space-md);
  color: rgba(255, 255, 255, 0.5);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.footer-brand {
  font-size: 1.3rem;
  font-weight: var(--fw-bold);
  color: var(--c-white);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.footer-brand .logo-icon {
  width: 24px;
  height: 24px;
  font-size: 0.8rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.85rem;
  font-weight: var(--fw-medium);
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--c-white);
}

.footer-copy {
  font-size: 0.8rem;
  opacity: 0.6;
}

/* ═══════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .float-cover {
    display: none;
  }

  .float-cover:nth-child(-n+4) {
    display: block;
  }

  .fc-1 {
    width: 120px;
    height: 120px;
  }

  .fc-2 {
    width: 110px;
    height: 110px;
  }

  .fc-3 {
    width: 100px;
    height: 100px;
  }

  .fc-4 {
    width: 115px;
    height: 115px;
  }
}

/* ═══════════════════════════════════════════════════
   HERO ACTIONS & SHARE BUTTON
   ═══════════════════════════════════════════════════ */
.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  animation: fadeInUp 1s 0.6s ease both;
}

.hero-cta {
  animation: none !important;
}

.hero-share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  background: rgba(255, 255, 255, 0.2);
  color: var(--c-white);
  border-radius: 50%;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: transform var(--transition), background var(--transition);
}

.hero-share-btn:hover {
  transform: scale(1.1);
  background: rgba(255, 255, 255, 0.3);
}

/* ═══════════════════════════════════════════════════
   FAQ SECTION
   ═══════════════════════════════════════════════════ */
.faq {
  padding: var(--space-3xl) 0;
  background: var(--c-white);
}

.faq-list {
  max-width: 800px;
  margin: var(--space-xl) auto 0;
  text-align: left;
}

.faq-item {
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) 0;
  font-size: 1.2rem;
  font-weight: var(--fw-semibold);
  color: var(--c-grey-900);
  background: none;
  border: none;
  text-align: left;
}

.faq-icon {
  position: relative;
  width: 20px;
  height: 20px;
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 2px;
  background: var(--c-grey-600);
  transform: translate(-50%, -50%);
  transition: transform var(--transition);
}

.faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-question[aria-expanded="true"] .faq-icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition);
}

.faq-answer p {
  padding-bottom: var(--space-md);
  color: var(--c-grey-600);
  font-size: 1.05rem;
  line-height: 1.6;
}

@media (max-width: 768px) {
  :root {
    --nav-height: 52px;
  }

  .nav-links {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  /* Mobile menu */
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: var(--space-lg);
    gap: var(--space-md);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    animation: slideDown 0.3s ease;
  }

  .nav-links.open a {
    font-size: 1.1rem;
  }

  @keyframes slideDown {
    from {
      opacity: 0;
      transform: translateY(-10px);
    }

    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

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

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

  .hamburger.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

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

  .feature-card {
    text-align: center;
  }

  .feature-icon-wrap {
    margin: 0 auto var(--space-md);
  }

  .listening-features {
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
  }

  .float-cover {
    display: none;
  }

  .discovery {
    min-height: auto;
    padding: var(--space-2xl) var(--space-md);
  }

  .radio-card {
    flex: 0 0 200px;
    height: 140px;
  }

  .screenshot-track {
    gap: var(--space-sm);
  }

  .phone-frame {
    width: 200px;
    height: 420px;
    border-radius: 28px;
  }

  .download-actions {
    flex-direction: column;
    align-items: center;
  }

  .eq-bars span {
    width: 30px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.8rem;
  }

  .phone-frame {
    width: 180px;
    height: 380px;
    border-radius: 24px;
  }
}

/* ─── PREFERS REDUCED MOTION ─── */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .hero-gradient {
    animation: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}