:root { color-scheme: dark; font-family: Arial, Helvetica, sans-serif; background: #000; color: #fff; }
    * { box-sizing: border-box; }
    html { scroll-padding-bottom: calc(var(--tip-height, 145px) + 20px); }
    body { margin: 0; min-height: 100svh; }
    main { width: min(calc(100% - 28px), 980px); margin: 0 auto; padding: 16px 0 calc(var(--tip-height, 145px) + 24px); text-align: center; }
    h1 { margin: 0 0 14px; font-size: clamp(1rem, 2.2vw, 1.5rem); font-weight: 750; line-height: 1.25; letter-spacing: -.025em; text-wrap: balance; }
    .cover { display: block; width: min(40%, 155px); height: auto; aspect-ratio: 1; margin: 0 auto 14px; object-fit: cover; border: 1px solid #282828; border-radius: 6px; }
    .buttons { display: grid; gap: 8px; max-width: 410px; margin: 0 auto; }
    .button { display: flex; align-items: center; justify-content: center; gap: 10px; width: 100%; min-height: 48px; padding: 11px 16px; border: 1px solid #414141; border-radius: 6px; background: #121212; color: #fff; font-size: 1rem; font-weight: 700; line-height: 1.3; text-decoration: none; transition: background .15s ease, border-color .15s ease; }
    .button:hover { background: #232323; border-color: #818181; }
    .button:focus-visible, .tip-button:focus-visible { outline: 3px solid #d9bbff; outline-offset: 4px; }
    .button svg { width: 21px; height: 21px; flex: 0 0 21px; }
    .download { color: #000; background: #fff; border-color: #fff; }
    .download:hover { background: #dfdfdf; border-color: #dfdfdf; }
    .dropdown { margin: 0; min-width: 0; }
    .dropdown > summary { position: relative; list-style: none; cursor: pointer; padding-inline: 38px; }
    .dropdown > summary::-webkit-details-marker { display: none; }
    .dropdown > summary::after { content: ''; position: absolute; right: 18px; width: 8px; height: 8px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: translateY(-2px) rotate(45deg); }
    .dropdown[open] > summary::after { transform: translateY(2px) rotate(225deg); }
    .dropdown-options { display: grid; gap: 6px; padding: 8px; margin-top: 6px; border: 1px solid #414141; border-radius: 6px; background: #0b0b0b; }
    .dropdown-options .button { justify-content: flex-start; font-size: .9375rem; text-align: left; }
    .challenge { border-color: #846699; background: #302037; }
    .challenge:hover { border-color: #c5a4db; background: #432b4d; }
    .tip-dock { position: fixed; z-index: 10; bottom: 0; left: 0; right: 0; padding: 10px max(14px, env(safe-area-inset-right)) calc(10px + env(safe-area-inset-bottom)) max(14px, env(safe-area-inset-left)); border-top: 1px solid #25412e; background: #070b08; box-shadow: 0 -10px 24px #000b; text-align: center; }
    .tips { max-width: 410px; margin: 0 auto; }
    .tips h2 { margin: 0 0 4px; font-size: 1.0625rem; line-height: 1.3; }
    .tip-caption { margin: 0 0 8px; color: #b8b8b8; font-size: .875rem; line-height: 1.4; }
    .tip-options { display: flex; flex-wrap: wrap; gap: 4px; }
    .tip-button { display: flex; flex: 1 0 calc((100% - 20px) / 6); align-items: center; justify-content: center; min-width: 2.75rem; min-height: 48px; padding: 12px 3px; border: 1px solid #00d64f; border-radius: 6px; background: #00d64f; color: #00240c; font-size: .9375rem; line-height: 1.3; font-weight: 800; text-decoration: none; white-space: nowrap; transition: background .15s ease; }
    .tip-button:hover { background: #4eeb88; border-color: #4eeb88; }

main { max-width: 438px; padding-top: 14px; }
.back { display: inline-flex; min-height: 32px; align-items: center; margin-bottom: 12px; color: #bfb2c9; font-size: .875rem; text-decoration: none; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.player-card { border: 1px solid #51445b; border-radius: 8px; background: #131016; padding: 14px; text-align: left; }
.version-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.version-row label { font-weight: 700; font-size: .9375rem; }
select { min-height: 44px; max-width: 100%; border: 1px solid #807087; border-radius: 5px; padding: 8px 30px 8px 10px; color: #fff; background: #21192a; font: inherit; font-size: 16px; }
.clip-label { font-size: .75rem; color: #c4b7cd; margin: 12px 0 8px; }
audio { display: block; width: 100%; height: 42px; }
.phone-switch { display: flex; gap: 8px; border: 0; padding: 0; margin: 14px 0 10px; }
.phone-switch legend { padding: 0 0 8px; font-size: .8125rem; color: #c4b7cd; }
.phone-switch label { position: relative; flex: 1; cursor: pointer; }
.phone-switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.phone-switch span { display: block; padding: 12px; border: 1px solid #66576f; border-radius: 5px; text-align: center; font-size: .875rem; }
.phone-switch input:checked + span { background: #e6d8f0; color: #1c1025; border-color: #e6d8f0; font-weight: 700; }
.phone-switch input:focus-visible + span, select:focus-visible, summary:focus-visible, a:focus-visible { outline: 3px solid #d9bbff; outline-offset: 3px; }
.actions { display: grid; gap: 8px; }
button { font-family: inherit; cursor: pointer; }
button:disabled { opacity: .6; cursor: default; }
.primary { color: #000; background: #fff; border-color: #fff; }
.primary:hover { color: #000; background: #e3e3e3; border-color: #e3e3e3; }
.status { font-size: .8125rem; line-height: 1.5; margin: 10px 0 0; color: #d1c0dc; }
.status:empty { display: none; }
.error { color: #ffbdbd; }
.guide { margin: 18px 0 0; text-align: left; }
.guide h2 { font-size: 1rem; margin: 0 0 10px; }
.guide img { display: block; width: 100%; height: auto; }
.guide .caption { color: #aca0b5; font-size: .75rem; line-height: 1.5; margin: 8px 0 0; }
.help { border-top: 1px solid #28212e; padding-top: 12px; margin-top: 14px; font-size: .8125rem; line-height: 1.6; color: #d1c0dc; }
.help summary { cursor: pointer; color: #e6d8f0; }
.help p { margin: 8px 0 0; }
.help a { color: #e7ccff; }
.help ol { padding-left: 22px; margin: 8px 0 0; }
.method-label { display: block; margin-bottom: 7px; font-size: .8125rem; color: #c4b7cd; }
#android-method { width: 100%; margin-bottom: 12px; }
.browser-note { padding: 12px; margin-bottom: 12px; border: 1px solid #846699; border-radius: 6px; background: #21192a; font-size: .875rem; line-height: 1.5; text-align: left; }
.browser-note p { margin: 0 0 8px; }
[hidden] { display: none !important; }
@media (max-height: 700px) { .back { margin-bottom: 8px; } }
@media (max-width: 600px) { .back { margin-bottom: 8px; } .phone-switch { margin-top: 10px; margin-bottom: 8px; } .clip-label { margin-top: 8px; } }
@media (max-width: 360px) { .player-card { padding: 12px; } .tips h2 { font-size: .9375rem; } .tip-dock { padding-top: 8px; } }
@media (max-height: 440px) { .tip-caption { display: none; } .tip-dock { padding-top: 6px; } .tips h2 { font-size: .875rem; margin-bottom: 6px; } }
@media (prefers-reduced-motion: reduce) { .button, .tip-button { transition: none; } }

    .other-tips { display: flex; align-items: center; justify-content: center; width: 100%; min-height: 28px; margin-top: 6px; padding: 4px 10px; border: 1px solid #fff; border-radius: 5px; background: #fff; color: #000; font-size: .8125rem; font-weight: 700; line-height: 1.3; text-decoration: none; }
    .other-tips:hover { background: #dfdfdf; border-color: #dfdfdf; }
    .other-tips:focus-visible { outline: 3px solid #d9bbff; outline-offset: 3px; }