@font-face {
  font-family: "Pretendard Variable";
  font-style: normal;
  font-weight: 45 920;
  src: url("assets/PretendardVariable.woff2") format("woff2-variations");
  font-display: swap;
}

@font-face {
  font-family: "LINE Seed JP";
  font-style: normal;
  font-weight: 400;
  src: url("assets/LINESeedJP-Rg.woff2") format("woff2");
  font-display: swap;
}

@font-face {
  font-family: "LINE Seed KR";
  font-style: normal;
  font-weight: 400;
  src: url("assets/LINESeedKR-Rg.woff2") format("woff2");
  font-display: swap;
}

:root {
  color-scheme: dark;
  --bg: #0a090d;
  --bg-deep: #07070a;
  --surface: #121118;
  --surface-2: #17151f;
  --surface-3: #1c1925;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #f8f6fb;
  --muted: #aaa5b2;
  --subtle: #77717f;
  --accent: #a779ff;
  --accent-light: #d8c6ff;
  --accent-soft: rgba(167, 121, 255, 0.13);
  --accent-softer: rgba(167, 121, 255, 0.07);
  --yt-red: #ef3232;
  --warm: #fff8e7;
  --max-width: 1200px;
  --nav-height: 76px;
  --header-offset: calc(var(--nav-height) + 1px);
  --features-anchor-gap: 35px;
  --guide-scroll-clearance: 0px;
  --shadow-lg: 0 34px 90px rgba(0, 0, 0, 0.48);
  --font-sans: "Pretendard Variable", "LINE Seed KR", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-ja: "LINE Seed JP", "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-family: var(--font-sans);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-offset);
  background: var(--bg);
}

body {
  min-width: 320px;
  margin: 0;
  padding-bottom: var(--guide-scroll-clearance);
  overflow-x: hidden;
  background:
    radial-gradient(circle at 80% 10%, rgba(104, 66, 175, 0.13), transparent 34rem),
    radial-gradient(circle at 12% 28%, rgba(167, 121, 255, 0.055), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  content: "";
  opacity: 0.3;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.012) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.012) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, #000, transparent 72%);
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

img,
svg {
  display: block;
}

img {
  max-width: 100%;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  transform: translateY(-160%);
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--text);
  color: var(--bg);
  font-weight: 800;
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  border-bottom: 1px solid transparent;
  transition:
    background-color 0.24s ease,
    border-color 0.24s ease,
    backdrop-filter 0.24s ease;
}

.site-header.is-scrolled,
.site-header.is-compact {
  border-color: var(--line);
  background: rgba(10, 9, 13, 0.78);
  backdrop-filter: blur(18px);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 48px), var(--max-width));
  height: var(--nav-height);
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.brand-icon,
.brand img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  filter: drop-shadow(0 9px 16px rgba(105, 61, 214, 0.34));
}

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

.nav-links > a:not(.nav-cta) {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  transition: color 0.2s ease;
}

.nav-links > a:not(.nav-cta):hover {
  color: var(--text);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 13px;
  border: 1px solid rgba(255, 255, 255, 0.64);
  border-radius: 12px;
  background: rgba(248, 246, 251, 0.96);
  box-shadow: 0 7px 20px rgba(0, 0, 0, 0.24);
  color: #17101f;
  font-size: 13px;
  font-weight: 800;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    background-color 0.2s ease,
    box-shadow 0.2s ease;
}

.nav-cta .chrome-icon {
  width: 18px;
  height: 18px;
}

.nav-cta:hover {
  transform: translateY(-1px);
  border-color: #fff;
  background: #fff;
  box-shadow: 0 9px 24px rgba(0, 0, 0, 0.3);
}

.hero {
  display: grid;
  grid-template-columns: minmax(360px, 0.83fr) minmax(590px, 1.17fr);
  align-items: center;
  gap: clamp(44px, 5.6vw, 78px);
  width: min(calc(100% - 48px), var(--max-width));
  min-height: max(860px, 100svh);
  margin: 0 auto;
  padding: 124px 0 78px;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.hero h1 {
  margin: 0;
  font-size: clamp(52px, 5.2vw, 76px);
  font-weight: 840;
  letter-spacing: -0.045em;
  line-height: 1.06;
  word-break: keep-all;
}

.hero h1 strong {
  color: var(--accent-light);
  font-weight: inherit;
}

.hero-description {
  max-width: 520px;
  margin: 27px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.78;
  word-break: keep-all;
}

.hero-actions {
  display: flex;
  align-items: center;
  margin-top: 34px;
}

.primary-action {
  display: inline-grid;
  grid-template-columns: auto auto auto;
  align-items: center;
  gap: 11px;
  width: fit-content;
  min-width: 0;
  min-height: 56px;
  padding: 0 18px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 14px;
  background: #f8f6fb;
  box-shadow:
    0 14px 34px rgba(0, 0, 0, 0.3),
    0 8px 24px rgba(104, 65, 190, 0.18);
  color: #17101f;
  font-weight: 900;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background-color 0.2s ease;
}

.primary-action:hover {
  transform: translateY(-2px);
  background: #fff;
  box-shadow:
    0 18px 42px rgba(0, 0, 0, 0.36),
    0 10px 28px rgba(104, 65, 190, 0.22);
}

.primary-action:active {
  transform: translateY(0);
}

.nav-cta:focus-visible,
.primary-action:focus-visible {
  outline: 3px solid rgba(216, 198, 255, 0.76);
  outline-offset: 3px;
}

.primary-action > span {
  display: flex;
  align-items: center;
}

.primary-action b {
  font-size: 16px;
  line-height: 1;
}

.chrome-icon {
  width: 24px;
  height: 24px;
}

.action-arrow {
  width: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.trust-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  color: var(--subtle);
  font-size: 12px;
  font-weight: 700;
  list-style: none;
}

.trust-list li {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.trust-list li + li::before {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: #55505c;
  content: "";
}

.product-stage {
  min-width: 0;
  width: 100%;
}

.browser-shell {
  --ytmusic-text-primary: #fff;
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #030303;
  box-shadow: var(--shadow-lg);
  font-synthesis: none;
}

.player-scene {
  position: relative;
  min-height: 0;
  overflow: hidden;
  padding: 34px 34px 36px;
  background: #030303;
}

.ytmusic-demo-layout {
  display: grid;
  grid-template-columns: minmax(132px, 0.24fr) minmax(0, 0.76fr);
  gap: 22px;
  min-width: 0;
}

.track-panel {
  min-width: 0;
  align-self: center;
  padding-left: 0;
  text-align: center;
}

.album-art {
  position: relative;
  width: min(100%, 216px);
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 8px;
  aspect-ratio: 1;
  background: #181823;
}

.album-art img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.36);
}

.track-title {
  margin: 22px 0 6px;
  color: var(--warm);
  font-family: var(--font-ja);
  font-size: 22px;
  line-height: 1.25;
}

.track-artist {
  margin: 0;
  color: var(--subtle);
  font-size: 15px;
}

.lyrics-card {
  width: 100%;
  min-width: 0;
  align-self: stretch;
  overflow: hidden;
  text-align: center;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}

.lyrics-window {
  position: relative;
  height: 472px;
  min-height: 472px;
  overflow: hidden;
  padding: 0;
}

.lyrics-window::before,
.lyrics-window::after {
  position: absolute;
  right: 0;
  left: 0;
  z-index: 4;
  height: 32px;
  pointer-events: none;
  content: "";
}

.lyrics-window::before {
  top: 0;
  background: linear-gradient(to bottom, #030303, transparent);
}

.lyrics-window::after {
  bottom: 0;
  background: linear-gradient(to top, #030303, transparent);
}

.lyrics-rail {
  --lyrics-edge-gap: 67.5px;
  --lyrics-group-gap: 135px;
  position: relative;
  display: block;
  padding: var(--lyrics-edge-gap) 0;
  transition: transform 750ms cubic-bezier(0.86, 0, 0.07, 1);
  will-change: transform;
}

.lyrics-rail.is-loop-resetting {
  transition: none !important;
}

.lyric-group {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  padding: 0;
  opacity: 0.25;
  filter: grayscale(1) saturate(0) blur(1px);
  transform: scale(0.95);
  transform-origin: center center;
  cursor: default;
  transition: none;
}

.lyric-group:not(:last-child) {
  margin-bottom: var(--lyrics-group-gap);
}

.lyric-group.is-active {
  opacity: 1;
  filter: none;
  transform: translateY(0);
}

.lyric-group p {
  display: block;
  width: 100%;
  margin: 0 !important;
  overflow: visible;
  overflow-wrap: anywhere;
  letter-spacing: 0.008em;
  line-height: normal;
  white-space: normal;
  word-break: break-word;
}

.lyric-original,
.lyric-hangul,
.lyric-translation {
  min-width: 0;
  overflow-wrap: anywhere;
  white-space: normal;
  word-break: break-word;
}

.lyric-original,
.lyric-hangul {
  position: relative;
}

.lyric-group .lyric-original {
  color: color-mix(in srgb, var(--ytmusic-text-primary, #fff) 89%, transparent);
  font-family: "Pretendard Variable", Pretendard, "LINE Seed JP", "LINE Seed KR",
    "SF Pro Rounded", "Segoe UI Rounded", ui-rounded, "Noto Sans JP", "Noto Sans KR",
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic",
    Meiryo, Roboto, Arial, sans-serif;
  font-size: 22.6px;
  font-weight: 550;
  line-height: 1.3;
  margin-bottom: 0 !important;
}

.lyric-group .lyric-hangul {
  color: color-mix(in srgb, var(--ytmusic-text-primary, #fff) 83%, transparent);
  font-family: "Pretendard Variable", Pretendard, "LINE Seed KR", "LINE Seed JP",
    "SF Pro Rounded", "Segoe UI Rounded", ui-rounded, "Noto Sans KR", "Noto Sans JP",
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic",
    Meiryo, Roboto, Arial, sans-serif;
  font-size: 18.3px;
  font-weight: 550;
  margin-bottom: 14px !important;
}

.lyric-translation {
  color: color-mix(in srgb, var(--ytmusic-text-primary, #fff) 76%, transparent);
  font-family: "Pretendard Variable", Pretendard, "LINE Seed KR", "LINE Seed JP",
    "SF Pro Rounded", "Segoe UI Rounded", ui-rounded, "Noto Sans KR", "Noto Sans JP",
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic",
    Meiryo, Roboto, Arial, sans-serif;
  font-size: 19.5px;
  font-weight: 450;
}

.lyric-group.is-active .lyric-original {
  color: rgba(255, 252, 242, 0.95);
  font-size: 22.6px;
  font-weight: 550;
  line-height: 1.3;
  text-shadow:
    0 0 1px rgba(255, 252, 242, 0.28),
    0 0 10px rgba(255, 252, 242, 0.18);
}

.lyric-group.is-active .lyric-hangul {
  color: rgba(255, 252, 242, 0.8);
  text-shadow: 0 0 0.8px rgba(255, 252, 242, 0.08), 0 1px 1px rgba(0, 0, 0, 0.18);
}

.lyric-group.is-active .lyric-translation {
  color: rgba(255, 252, 242, 0.76);
  text-shadow: 0 0 0.8px rgba(255, 252, 242, 0.08), 0 1px 1px rgba(0, 0, 0, 0.18);
}

.richsync-line {
  position: relative;
}

.lyric-original span,
.lyric-hangul span,
.lyric-translation span {
  display: inline;
  max-width: none;
  overflow: visible;
  overflow-wrap: anywhere;
  text-overflow: clip;
  white-space: normal;
  word-break: break-word;
}

.lyric-hangul > .lyric-base,
.lyric-translation > .lyric-base {
  display: inline-block;
  max-width: 100%;
}

@property --richsync-glow-opacity {
  syntax: "<number>";
  inherits: false;
  initial-value: 0;
}

.richsync-base {
  display: inline;
  color: inherit;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.richsync-overlay {
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  color: transparent;
  pointer-events: none;
  text-shadow: none;
}

.richsync-overlay .richsync-segment {
  --richsync-progress: 0%;
  --richsync-glow-opacity: 0;
  display: inline;
  color: transparent;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  background-image: none;
  transition: --richsync-glow-opacity 120ms ease-out;
}

.lyric-group.is-active .lyric-original.richsync-line .richsync-base {
  color: rgba(255, 252, 242, 0.36);
  text-shadow: none;
}

.lyric-group.is-active .lyric-original.richsync-line .richsync-overlay .richsync-segment {
  background-image:
    linear-gradient(
      90deg,
      transparent 0%,
      transparent max(0%, calc(var(--richsync-progress, 0%) - 0.48em)),
      rgba(255, 255, 255, var(--richsync-glow-opacity, 0)) max(0%, calc(var(--richsync-progress, 0%) - 0.48em)),
      rgba(255, 255, 255, var(--richsync-glow-opacity, 0)) var(--richsync-progress, 0%),
      transparent var(--richsync-progress, 0%),
      transparent 100%
    ),
    linear-gradient(
    90deg,
      rgba(255, 252, 242, 0.95) 0%,
      rgba(255, 252, 242, 0.95) var(--richsync-progress, 0%),
      transparent var(--richsync-progress, 0%),
      transparent 100%
    );
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.lyric-group.is-active .lyric-original.richsync-line .richsync-overlay .richsync-segment.is-richsync-active {
  --richsync-glow-opacity: 1;
}

.lyric-group:not(.is-active) .richsync-overlay {
  display: none;
}

.features,
.guide,
.final-cta,
.site-footer {
  width: min(calc(100% - 48px), var(--max-width));
  margin: 0 auto;
}

.features {
  scroll-margin-top: 0;
  padding: 84px 0 74px;
}

.section-heading {
  margin-bottom: 38px;
}

.section-heading h2,
.guide-intro h2,
.final-cta h2 {
  margin: 0;
  font-size: clamp(38px, 4.5vw, 62px);
  font-weight: 840;
  letter-spacing: -0.045em;
  line-height: 1.08;
  word-break: keep-all;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  min-height: 245px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.018)),
    #111016;
  transition:
    transform 0.26s ease,
    border-color 0.26s ease,
    background-color 0.26s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(167, 121, 255, 0.26);
  background-color: #14121a;
}

.feature-copy {
  padding: 30px;
}

.feature-number {
  color: var(--accent-light);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.feature-copy h3 {
  margin: 24px 0 14px;
  font-size: 28px;
  font-weight: 840;
  letter-spacing: -0.035em;
  line-height: 1.16;
  word-break: keep-all;
}

.feature-copy p {
  margin: 0;
  color: #938d99;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.65;
  word-break: keep-all;
}

.guide {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(540px, 1.28fr);
  gap: 46px;
  scroll-margin-top: 0;
  padding: 92px 0 72px;
  border-top: 1px solid var(--line);
}

.guide-intro {
  position: static;
}

.guide-intro h2 {
  font-size: clamp(36px, 4vw, 55px);
}

.steps {
  display: grid;
  grid-column: 2;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.steps li:first-child {
  border-top: 0;
}

.steps li > span {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: rgba(167, 121, 255, 0.16);
  color: var(--accent-light);
  font-size: 13px;
  font-weight: 900;
}

.steps strong {
  display: block;
  margin-bottom: 6px;
  font-size: 19px;
}

.steps p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.65;
}

.faq {
  grid-column: 1 / -1;
  margin-top: 34px;
  border-top: 1px solid var(--line);
}

.faq details {
  border-bottom: 1px solid var(--line);
}

.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 23px 2px;
  cursor: pointer;
  color: #eeeaf3;
  font-size: 17px;
  font-weight: 800;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary span {
  color: var(--accent-light);
  font-size: 20px;
  transition: transform 0.2s ease;
}

.faq details[open] summary span {
  transform: rotate(45deg);
}

.faq details p {
  max-width: 760px;
  margin: -5px 0 24px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.75;
}

.faq details p a {
  color: var(--accent-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.final-cta {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 32px;
  margin-top: 36px;
  padding: 68px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.final-cta h2 {
  font-size: clamp(36px, 4.6vw, 64px);
}

.final-action {
  align-self: center;
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto;
  column-gap: clamp(40px, 7vw, 96px);
  row-gap: 28px;
  padding: 40px 0 32px;
  color: #77717e;
}

.footer-brand-block .brand {
  color: var(--text);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  grid-column: 2;
  align-self: center;
  justify-content: flex-end;
  gap: 10px 24px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.footer-links a {
  transition: color 0.2s ease;
}

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

.footer-note {
  display: flex;
  grid-column: 1 / -1;
  justify-content: space-between;
  width: 100%;
  margin: 0;
  text-align: left;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.7;
}

.footer-note span:last-child {
  white-space: nowrap;
}

.policy-page {
  width: min(calc(100% - 48px), 860px);
  margin: 0 auto;
  padding: 136px 0 72px;
}

.policy-page h1 {
  margin: 0;
  font-size: clamp(42px, 6vw, 68px);
  letter-spacing: -0.05em;
  line-height: 1.06;
}

.policy-updated,
.policy-page p,
.policy-page li {
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.8;
}

.policy-updated {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 18px 0 44px;
}

.policy-page section {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.policy-page h2 {
  margin: 0 0 12px;
  font-size: 23px;
}

.policy-page a {
  color: var(--accent-light);
}

@media (min-width: 921px) {
  .features {
    scroll-margin-top: var(--features-anchor-gap);
    min-height: calc(100svh - var(--header-offset) - var(--features-anchor-gap) + 1px);
  }
}

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: minmax(320px, 0.76fr) minmax(540px, 1.24fr);
    gap: 34px;
  }

  .feature-copy {
    padding: 26px;
  }

  .feature-copy h3 {
    font-size: 25px;
  }
}

@media (max-width: 920px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 112px;
  }

  .hero-copy {
    max-width: 730px;
  }

  .hero-description {
    max-width: 620px;
  }

  .browser-shell {
    transform: none;
  }

  .product-stage:hover .browser-shell,
  .browser-shell:focus-within {
    transform: translateY(-2px);
  }

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

  .feature-card {
    min-height: 0;
  }

  .feature-copy h3 {
    margin-top: 22px;
  }

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

  .steps {
    grid-column: auto;
  }

  .final-cta {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 680px) {
  :root {
    --nav-height: 66px;
  }

  .nav-shell,
  .hero,
  .features,
  .guide,
  .final-cta,
  .site-footer,
  .policy-page {
    width: calc(100% - 48px);
    max-width: var(--max-width);
  }

  .nav-shell {
    width: auto;
    max-width: none;
    margin-left: 24px;
    margin-right: max(0px, calc(24px - (100vw - 100%)));
  }

  .brand {
    gap: 9px;
    font-size: 16px;
  }

  .brand-icon,
  .brand img {
    width: 34px;
    height: 34px;
  }

  .nav-links > a:not(.nav-cta) {
    display: none;
  }

  .nav-links {
    gap: 0;
  }

  .nav-cta {
    width: 42px;
    height: 36px;
    justify-content: center;
    gap: 0;
    overflow: hidden;
    padding: 9px 12px;
    font-size: 0;
    white-space: nowrap;
  }

  .hero {
    gap: 34px;
    padding: 114px 0 58px;
  }

  .hero h1 {
    max-width: 100%;
    font-size: clamp(40px, 12vw, 58px);
    line-height: 1.08;
  }

  .hero-description {
    margin-top: 21px;
    font-size: 15px;
    line-height: 1.72;
    word-break: normal;
    overflow-wrap: break-word;
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
    margin-top: 28px;
  }

  .primary-action {
    max-width: 100%;
  }

  .trust-list {
    justify-content: center;
    margin-top: 20px;
    font-size: 11px;
  }

  .browser-shell {
    border-radius: 8px;
  }

  .player-scene {
    min-width: 0;
    padding: 18px;
  }

  .ytmusic-demo-layout {
    grid-template-columns: 1fr;
    gap: 20px;
    padding-left: 0;
  }

  .track-panel {
    display: block;
    padding-top: 0;
  }

  .album-art {
    width: 84px;
  }

  .track-title {
    margin-top: 8px;
    font-size: 18px;
  }

  .lyrics-window {
    height: 342px;
    min-height: 342px;
    padding: 0 14px;
  }

  .lyrics-window::before,
  .lyrics-window::after {
    height: 16px;
  }

  .lyric-group .lyric-original,
  .lyric-group.is-active .lyric-original {
    font-size: 19.8px;
  }

  .lyric-group .lyric-hangul {
    font-size: 16px;
  }

  .lyric-translation {
    font-size: 16.9px;
  }

  .lyric-original span,
  .lyric-hangul span,
  .lyric-translation span {
    line-height: 1.4;
  }

  .features {
    padding: 94px 0 54px;
  }

  .section-heading {
    margin-bottom: 30px;
  }

  .section-heading h2,
  .guide-intro h2,
  .final-cta h2 {
    font-size: clamp(34px, 10.5vw, 47px);
  }

  .feature-card {
    min-height: 0;
    border-radius: 23px;
  }

  .feature-copy {
    padding: 24px 23px 20px;
  }

  .feature-copy h3 {
    margin: 20px 0 12px;
    font-size: 27px;
  }

  .feature-copy p {
    font-size: 13px;
  }

  .guide {
    gap: 34px;
    padding: 86px 0 58px;
  }

  .steps li {
    padding: 17px 0;
  }

  .faq summary {
    padding: 19px 1px;
    font-size: 15px;
    line-height: 1.45;
  }

  .faq details p {
    font-size: 13px;
  }

  .final-cta {
    grid-template-columns: 1fr;
    gap: 34px;
    margin-top: 38px;
    padding: 60px 0;
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 0 40px;
  }

  .footer-links {
    display: grid;
    grid-column: auto;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    justify-content: stretch;
    gap: 12px 20px;
  }

  .footer-note {
    grid-column: auto;
    display: grid;
    justify-content: start;
    gap: 6px;
  }

  .policy-page {
    padding: 110px 0 58px;
  }
}

@media (max-width: 420px) {
  .nav-cta {
    padding: 0;
  }

  .hero-description {
    overflow-wrap: break-word;
  }

  .section-heading h2,
  .guide-intro h2,
  .final-cta h2 {
    font-size: 34px;
  }

}

@media (max-width: 520px) {
  .hero h1 {
    font-size: clamp(38px, 11.4vw, 48px);
  }
}

@media (max-width: 360px) {
  .lyrics-window {
    padding-right: 4px;
    padding-left: 4px;
  }

  .lyric-group .lyric-original,
  .lyric-group.is-active .lyric-original {
    font-size: clamp(17.2px, 5.5vw, 19.8px);
  }

  .lyric-group .lyric-hangul {
    font-size: clamp(14px, 4.45vw, 16px);
  }

  .lyric-translation {
    font-size: clamp(14.5px, 4.7vw, 16.9px);
  }

  .lyric-original span,
  .lyric-hangul span,
  .lyric-translation span {
    line-height: 1.35;
  }
}

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

  .lyrics-rail {
    transition-duration: 750ms !important;
  }
}