:root {
  --activity-ink: #100913;
  --activity-paper: #fff9ee;
  --activity-muted: rgba(255, 249, 238, 0.68);
  --activity-line: rgba(255, 249, 238, 0.18);
  --activity-cyan: #9fe1db;
  --activity-rose: #d98a9e;
  --activity-violet: #b7a1e9;
  --activity-gold: #e9c27e;
  --activity-serif: "STSong", "Songti SC", "Noto Serif SC", "Source Han Serif SC", serif;
  --activity-sans: "PingFang SC", "Microsoft YaHei", Inter, system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { background: var(--activity-ink); scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; background: var(--activity-ink); color: var(--activity-paper); font-family: var(--activity-sans); line-height: 1.55; }
button { font: inherit; cursor: pointer; }
button:disabled { cursor: not-allowed; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--activity-cyan); outline-offset: 4px; }

.activity-skip-link { position: fixed; z-index: 100; top: 12px; left: 12px; padding: 10px 14px; transform: translateY(-170%); background: var(--activity-paper); color: var(--activity-ink); }
.activity-skip-link:focus { transform: translateY(0); }
.activity-noscript { margin: 0; padding: 12px 20px; background: #f6cf72; color: #201309; font-weight: 800; text-align: center; }

.scent-activity-shell { position: relative; min-height: 100svh; isolation: isolate; overflow-x: clip; }
.scent-activity-shell::before { position: absolute; z-index: -2; inset: 0; content: ""; background: radial-gradient(circle at 50% 4%, rgba(183, 161, 233, .17), transparent 31%), linear-gradient(180deg, #17101f 0%, #100913 58%, #09060c 100%); }
.scent-activity-shell::after { position: absolute; z-index: -1; inset: 0; content: ""; pointer-events: none; background: radial-gradient(circle at 15% 14%, rgba(159, 225, 219, 0.15), transparent 26%), radial-gradient(circle at 78% 73%, rgba(217, 138, 158, 0.17), transparent 30%); }

/* Desktop uses the supplied portrait master across the full page width. */
@media (min-width: 781px) {
  .scent-activity-shell::before {
    background:
      linear-gradient(180deg, rgba(18, 9, 23, .10) 0%, rgba(25, 12, 29, .32) 40%, rgba(18, 9, 23, .86) 76%, #100913 100%),
      url("assets/scentheon-dionysus-desktop.jpg") center top / 100% auto no-repeat,
      #100913;
  }
  .scent-activity-shell::after {
    background:
      radial-gradient(circle at 13% 44%, rgba(183, 161, 233, .24), transparent 33%),
      radial-gradient(circle at 86% 53%, rgba(217, 138, 158, .24), transparent 37%),
      linear-gradient(90deg, rgba(84, 47, 91, .18), transparent 30% 70%, rgba(112, 48, 70, .18));
  }
}

.activity-header { display: flex; width: min(440px, calc(100% - 32px)); min-height: 82px; margin: 0 auto; align-items: center; justify-content: space-between; gap: 18px; }
.activity-brand { display: inline-flex; width: clamp(112px, 13vw, 158px); align-items: center; }
.activity-brand img { display: block; width: 100%; height: auto; filter: drop-shadow(0 2px 10px rgba(0, 0, 0, .42)); }
.activity-return { border-bottom: 1px solid rgba(255, 249, 238, .44); color: rgba(255, 249, 238, .86); font-size: 14px; font-weight: 750; }
.activity-return:hover { border-bottom-color: var(--activity-cyan); color: var(--activity-cyan); }

.activity-gate, .activity-app { width: min(440px, calc(100% - 32px)); margin: 0 auto; }
.activity-gate { display: grid; min-height: calc(100svh - 82px); max-width: 440px; padding-bottom: 72px; align-content: center; justify-items: start; }
.activity-kicker { margin: 0; color: var(--activity-cyan); font-size: 11px; font-weight: 850; letter-spacing: .15em; }
.activity-gate h1, .activity-screen--home h1 { margin: 13px 0 20px; font-family: var(--activity-serif); font-size: clamp(50px, 8vw, 86px); font-weight: 600; letter-spacing: -.065em; line-height: 1.05; }
.activity-gate > p { max-width: 38em; margin: 0 0 28px; color: var(--activity-muted); font-size: 16px; line-height: 1.85; }

.activity-app { padding: 14px 0 64px; }
.activity-screen { position: relative; overflow: hidden; min-height: min(780px, calc(100svh - 112px)); padding: clamp(28px, 5.5vw, 38px); border: 1px solid rgba(255, 249, 238, .22); border-radius: 3px 34px 3px 34px; background: linear-gradient(132deg, rgba(28, 17, 39, .93), rgba(14, 8, 21, .89)); box-shadow: 18px 20px 0 rgba(183, 161, 233, .09); }
.activity-screen::before { position: absolute; inset: 14px; content: ""; border: 1px solid rgba(255, 249, 238, .08); pointer-events: none; }
.activity-screen > * { position: relative; z-index: 1; }
.activity-screen h1[tabindex="-1"]:focus, .activity-screen h2[tabindex="-1"]:focus { outline: none; }

.activity-screen--home { display: flex; min-height: 0; aspect-ratio: 9 / 16; padding-top: clamp(370px, 45svh, 420px); flex-direction: column; align-items: flex-start; justify-content: flex-end; background: linear-gradient(180deg, rgba(16, 9, 19, .03) 0%, rgba(16, 9, 19, .18) 31%, rgba(16, 9, 19, .92) 62%, rgba(16, 9, 19, .99) 100%), url("assets/scentheon-dionysus-desktop.jpg") center top / 100% auto no-repeat; }
.activity-screen--home::after { display: none; }
.activity-home-subtitle { width: 100%; min-width: 0; max-width: 16em; margin: 0; overflow-wrap: anywhere; font-family: var(--activity-serif); font-size: clamp(23px, 3vw, 34px); letter-spacing: -.045em; line-height: 1.32; }
.activity-home-copy { width: 100%; min-width: 0; max-width: 32em; margin: 18px 0 32px; overflow-wrap: anywhere; color: var(--activity-muted); font-size: 15px; line-height: 1.85; }

.activity-step-topline { display: flex; width: max-content; min-width: 158px; margin-bottom: 27px; border-bottom: 1px solid rgba(159, 225, 219, .48); color: var(--activity-cyan); font-family: ui-monospace, "SFMono-Regular", Menlo, monospace; font-size: 12px; font-weight: 850; letter-spacing: .1em; }
.activity-step-topline span { padding: 0 12px 9px; }
.activity-step-topline span + span { border-left: 1px solid rgba(159, 225, 219, .26); color: rgba(255, 249, 238, .68); letter-spacing: .04em; }
.activity-screen h2 { max-width: 17em; margin: 0; font-family: var(--activity-serif); font-size: clamp(36px, 5.4vw, 62px); font-weight: 600; letter-spacing: -.07em; line-height: 1.14; }
.activity-screen-subtitle { max-width: 44em; margin: 18px 0 0; color: rgba(255, 249, 238, .83); font-size: 16px; line-height: 1.8; }
.activity-selection-help { margin: 27px 0 4px; color: var(--activity-cyan); font-size: 13px; font-weight: 800; }
.activity-selection-status { min-height: 24px; margin: 0 0 15px; color: rgba(255, 249, 238, .62); font-size: 13px; }

.activity-note-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
.activity-note { min-height: 54px; padding: 10px 12px; border: 1px solid rgba(255, 249, 238, .20); border-radius: 2px 14px 2px 14px; background: rgba(8, 5, 12, .34); color: var(--activity-paper); font-size: 14px; font-weight: 760; line-height: 1.25; text-align: center; transition: transform .18s ease, border-color .18s ease, color .18s ease, background .18s ease; }
.activity-note:hover { border-color: var(--activity-cyan); color: var(--activity-cyan); transform: translateY(-2px); }
.activity-note.is-selected { border-color: var(--activity-cyan); background: rgba(159, 225, 219, .14); color: var(--activity-cyan); box-shadow: inset 0 0 0 1px rgba(159, 225, 219, .16); }

.activity-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.activity-primary, .activity-secondary { display: inline-grid; min-height: 47px; padding: 0 19px; place-items: center; border-radius: 2px 17px 2px 17px; font-size: 14px; font-weight: 900; transition: color .18s ease, border-color .18s ease, background .18s ease, transform .18s ease, opacity .18s ease; }
.activity-primary { border: 1px solid var(--activity-cyan); background: var(--activity-cyan); color: var(--activity-ink); }
.activity-primary:hover:not(:disabled) { border-color: var(--activity-paper); background: var(--activity-paper); transform: translateY(-2px); }
.activity-primary:disabled { border-color: rgba(159, 225, 219, .26); background: rgba(159, 225, 219, .19); color: rgba(16, 9, 19, .52); }
.activity-primary--start { width: fit-content; min-width: 160px; }
.activity-secondary { border: 1px solid rgba(255, 249, 238, .34); background: transparent; color: var(--activity-paper); }
.activity-secondary:hover { border-color: var(--activity-cyan); color: var(--activity-cyan); transform: translateY(-2px); }

.activity-screen--generation { display: grid; min-height: 600px; margin: 0 auto; place-items: center; align-content: center; text-align: center; }
.activity-screen--generation h2 { max-width: none; margin-top: 18px; }
.activity-mixing-orbit { position: relative; width: 168px; height: 168px; border: 1px solid rgba(159, 225, 219, .42); border-radius: 50%; }
.activity-mixing-orbit::before, .activity-mixing-orbit::after { position: absolute; inset: 17px; content: ""; border: 1px solid rgba(217, 138, 158, .44); border-radius: 50%; transform: rotate(43deg) scaleX(.58); }
.activity-mixing-orbit::after { border-color: rgba(183, 161, 233, .48); transform: rotate(-43deg) scaleX(.58); }
.activity-mixing-orbit i { position: absolute; top: 50%; left: 50%; width: 12px; height: 12px; border-radius: 50%; background: var(--activity-cyan); box-shadow: 0 0 22px var(--activity-cyan); transform: translate(-50%, -50%); animation: scent-orbit 2.4s linear infinite; transform-origin: 0 -68px; }
.activity-mixing-orbit i:nth-child(2) { width: 9px; height: 9px; background: var(--activity-rose); box-shadow: 0 0 20px var(--activity-rose); animation-delay: -.8s; transform-origin: 0 55px; }
.activity-mixing-orbit i:nth-child(3) { width: 8px; height: 8px; background: var(--activity-gold); box-shadow: 0 0 18px var(--activity-gold); animation-delay: -1.5s; transform-origin: 54px 0; }
@keyframes scent-orbit { to { transform: translate(-50%, -50%) rotate(360deg); } }
.activity-generation-copy { min-height: 28px; margin: 15px 0 0; color: var(--activity-muted); font-size: 16px; }
.activity-generation-steps { display: grid; width: min(100%, 390px); margin: 28px 0 0; padding: 0; list-style: none; gap: 8px; text-align: left; }
.activity-generation-steps li { padding: 9px 12px; border-left: 2px solid rgba(255, 249, 238, .18); color: rgba(255, 249, 238, .42); font-size: 13px; transition: color .2s ease, border-color .2s ease; }
.activity-generation-steps li.is-current { border-color: var(--activity-cyan); color: var(--activity-paper); }
.activity-generation-steps li.is-complete { border-color: rgba(159, 225, 219, .42); color: var(--activity-cyan); }

.activity-screen--result { min-height: auto; }
.activity-screen--result > h2 { margin: 8px 0 31px; font-size: clamp(36px, 4.3vw, 52px); }
.activity-result-card { display: grid; overflow: hidden; border: 1px solid rgba(255, 249, 238, .28); border-radius: 2px 30px 2px 30px; grid-template-columns: 1fr; background: linear-gradient(135deg, rgba(42, 27, 54, .94), rgba(12, 7, 16, .91)); box-shadow: 17px 19px 0 rgba(217, 138, 158, .10); }
.activity-result-portrait { position: relative; display: grid; min-height: 0; aspect-ratio: 9 / 16; padding: 32px; place-items: center; overflow: hidden; background: radial-gradient(circle at 45% 32%, rgba(159, 225, 219, .25), transparent 25%), linear-gradient(145deg, rgba(183, 161, 233, .28), rgba(8, 5, 12, .1) 62%); }
.activity-result-portrait::after { position: absolute; inset: 14px; content: ""; border: 1px solid rgba(255, 249, 238, .22); border-radius: 1px 17px 1px 17px; }
.activity-result-portrait img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; object-position: center; }
.activity-result-portrait span { position: relative; z-index: 1; padding: 9px 12px; border: 1px solid rgba(255, 249, 238, .5); background: rgba(16, 9, 19, .65); color: var(--activity-paper); font-size: 13px; font-weight: 800; letter-spacing: .04em; }
.activity-result-copy { min-width: 0; padding: clamp(26px, 4vw, 48px); }
.activity-result-label { margin: 0; color: var(--activity-cyan); font-size: 11px; font-weight: 850; letter-spacing: .15em; }
.activity-result-copy h3 { margin: 12px 0 8px; font-family: var(--activity-serif); font-size: clamp(45px, 6vw, 66px); font-weight: 600; letter-spacing: -.07em; line-height: 1; }
.activity-result-profile-label { margin: 18px 0 4px; color: var(--activity-cyan); font-size: 10px; font-weight: 850; letter-spacing: .11em; }
.activity-result-profile { margin: 0; color: rgba(255, 249, 238, .74); font-size: 15px; }
.activity-result-meta { display: grid; margin: 25px 0 0; border-top: 1px solid rgba(255, 249, 238, .17); border-bottom: 1px solid rgba(255, 249, 238, .17); grid-template-columns: 1fr; }
.activity-result-meta div { min-width: 0; padding: 13px 10px 14px 0; }
.activity-result-meta div + div { padding-left: 0; border-left: 0; border-top: 1px solid rgba(255, 249, 238, .12); }
.activity-result-meta dt, .activity-result-selections dt { color: var(--activity-cyan); font-size: 10px; font-weight: 850; letter-spacing: .11em; }
.activity-result-meta dd, .activity-result-selections dd { margin: 6px 0 0; overflow-wrap: anywhere; color: var(--activity-paper); font-size: 13px; line-height: 1.45; }
.activity-result-selections, .activity-result-notebook { margin-top: 26px; }
.activity-result-selections h4, .activity-result-notebook h4 { margin: 0 0 10px; color: var(--activity-paper); font-size: 14px; }
.activity-result-selections dl { display: grid; margin: 0; grid-template-columns: 1fr; gap: 9px; }
.activity-result-selections dl div { min-width: 0; padding: 11px; border: 1px solid rgba(255, 249, 238, .16); background: rgba(9, 5, 13, .26); }
.activity-result-notebook p { margin: 0; white-space: pre-line; color: rgba(255, 249, 238, .80); font-family: var(--activity-serif); font-size: 16px; line-height: 1.75; }
.activity-screenshot-hint { margin: 21px 0 0; color: var(--activity-cyan); font-size: 13px; }

@media (max-width: 780px) {
  .activity-header, .activity-gate, .activity-app { width: min(100% - 32px, 440px); }
  .activity-header { min-height: 76px; }
  .activity-screen { min-height: calc(100svh - 108px); padding: 31px 22px; border-radius: 2px 24px 2px 24px; }
  .activity-screen--home { min-height: calc(100svh - 108px); padding-top: clamp(260px, 42svh, 350px); padding-right: 22px; }
  .activity-home-subtitle { font-size: 26px; }
  .activity-result-meta div, .activity-result-meta div + div { padding: 12px 0; border-left: 0; border-bottom: 1px solid rgba(255, 249, 238, .12); }
  .activity-result-meta div:last-child { border-bottom: 0; }
}

@media (max-width: 480px) {
  .activity-header, .activity-gate, .activity-app { width: calc(100% - 28px); }
  .activity-brand { width: 122px; }
  .activity-return { font-size: 13px; }
  .activity-app { padding-top: 14px; }
  .activity-screen { padding: 28px 17px; }
  .activity-screen--home { padding-top: 260px; }
  .activity-home-subtitle { max-width: 13em; font-size: 24px; }
  .activity-home-copy { max-width: 21em; }
  .activity-gate h1, .activity-screen--home h1 { font-size: 54px; }
  .activity-screen h2 { font-size: 38px; }
  .activity-screen-subtitle { font-size: 15px; }
  .activity-note-grid { gap: 8px; }
  .activity-note { min-height: 52px; padding: 9px 8px; font-size: 13px; }
  .activity-actions { display: grid; grid-template-columns: 1fr; }
  .activity-actions > * { width: 100%; }
  .activity-result-copy { padding: 25px 19px; }
  .activity-result-copy h3 { font-size: 50px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

/* Desktop is a vertically scrolling composition too.  The artwork fills the
   available width at its portrait ratio; only readable text columns are
   constrained horizontally. */
@media (min-width: 781px) {
  .activity-header, .activity-gate { width: min(760px, calc(100% - clamp(40px, 8vw, 128px))); max-width: none; }
  .activity-header { min-height: 92px; }
  .activity-gate { min-height: 0; padding: clamp(86px, 12vw, 170px) 0 clamp(72px, 9vw, 130px); }
  .activity-app { width: 100%; max-width: none; padding: 0 0 clamp(70px, 8vw, 120px); }
  .activity-screen:not(.activity-screen--home) { width: min(760px, calc(100% - clamp(40px, 8vw, 128px))); min-height: 0; margin: 24px auto 0; padding: clamp(34px, 5vw, 62px); }
  .activity-screen--home {
    width: 100%;
    min-height: max(100svh, calc(100vw * 2560 / 1440));
    margin: 0;
    aspect-ratio: 1440 / 2560;
    padding: clamp(520px, 43vw, 760px) max(clamp(20px, 4vw, 64px), calc((100% - 680px) / 2)) clamp(72px, 8vw, 118px);
    border: 0;
    border-radius: 0;
    box-shadow: none;
    justify-content: flex-start;
    background:
      linear-gradient(180deg, rgba(16, 9, 19, .05) 0%, rgba(16, 9, 19, .17) 34%, rgba(16, 9, 19, .90) 73%, #100913 100%),
      url("assets/scentheon-dionysus-desktop.jpg") center top / 100% auto no-repeat;
  }
  .activity-screen--home::before { display: none; }
  .activity-home-subtitle { max-width: 18em; font-size: clamp(27px, 3vw, 42px); }
  .activity-home-copy { max-width: 42em; }
  .activity-note-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .activity-note { min-height: 64px; padding: 14px; font-size: 15px; }
  .activity-generation-steps { width: min(100%, 560px); }
  .activity-result-card { grid-template-columns: 1fr; }
  .activity-result-portrait { min-height: 0; aspect-ratio: 9 / 16; }
  .activity-result-copy { padding: clamp(38px, 5vw, 64px); }
  .activity-result-meta { grid-template-columns: 1fr; }
  .activity-result-meta div + div { padding-left: 0; border-top: 1px solid rgba(255, 249, 238, .12); border-left: 0; }
  .activity-result-selections dl { grid-template-columns: 1fr; }
}