:root {
  --cream: #fff8f2;
  --paper: rgba(255, 253, 250, 0.9);
  --paper-solid: #fffdfa;
  --ink: #443b48;
  --muted: #8b7f8d;
  --pink: #e998ac;
  --pink-deep: #c96f8b;
  --lilac: #a99bca;
  --line: rgba(125, 101, 122, 0.17);
  --shadow: 0 24px 70px rgba(112, 79, 100, 0.16);
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--cream); }
body { margin: 0; color: var(--ink); font-family: "LXGW WenKai", "Kaiti SC", "STKaiti", "Noto Serif SC", serif; }
button, input, textarea, select { font: inherit; }
button { color: inherit; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.site-shell { min-height: 100vh; position: relative; overflow: hidden; background: linear-gradient(145deg, rgba(255,248,242,.93), rgba(249,241,247,.9)); transition: background .3s, color .3s; }
.art-layer { position: absolute; inset: 0; background: linear-gradient(rgba(255,248,242,.4), rgba(255,248,242,.22)), url("./hero-background.png") center / cover no-repeat; opacity: .92; pointer-events: none; }
.site-header { position: relative; z-index: 4; height: 86px; padding: 0 clamp(22px, 5vw, 82px); display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; border-bottom: 1px solid rgba(126,101,121,.1); background: rgba(255,250,246,.55); backdrop-filter: blur(16px); }
.brand { display: inline-flex; align-items: center; gap: 10px; justify-self: start; border: 0; background: transparent; cursor: pointer; font-size: clamp(18px, 2vw, 25px); font-weight: 700; letter-spacing: .06em; }
.brand-mark { width: 48px; height: 42px; fill: rgba(224,137,163,.18); stroke: var(--pink-deep); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.brand-face, .brand-wave { fill: none; }
.mode-nav { display: flex; align-items: center; gap: 12px; padding: 6px; border-radius: 999px; background: rgba(255,255,255,.48); border: 1px solid rgba(143,116,139,.1); }
.mode-nav button { min-width: 92px; padding: 10px 18px; border: 0; border-radius: 999px; background: transparent; color: var(--muted); cursor: pointer; transition: .2s ease; }
.mode-nav button.active { background: var(--paper-solid); color: var(--pink-deep); box-shadow: 0 7px 20px rgba(139,91,116,.13); }
.nav-icon { display: inline-grid; place-items: center; width: 22px; height: 22px; margin-right: 6px; border: 1px solid currentColor; border-radius: 50%; }
.header-actions { justify-self: end; display: flex; align-items: center; gap: 10px; }
.language, .theme-toggle { border: 1px solid var(--line); background: rgba(255,255,255,.55); color: var(--muted); cursor: pointer; }
.language { border-radius: 999px; padding: 8px 12px; display: flex; gap: 5px; }
.language strong { font-weight: 500; }
.language strong.selected { color: var(--pink-deep); }
.theme-toggle { width: 39px; height: 39px; border-radius: 50%; font-size: 20px; }

.hero { position: relative; z-index: 2; width: min(760px, calc(100% - 32px)); margin: 0 auto; padding: 58px 0 38px; text-align: center; }
.hero-copy h1 { margin: 0; color: #5d4d60; font-size: clamp(36px, 5vw, 61px); font-weight: 700; letter-spacing: .08em; text-shadow: 0 3px 0 rgba(255,255,255,.75); }
.hero-copy p { margin: 12px 0 32px; color: #87798a; font-size: clamp(15px, 1.8vw, 19px); letter-spacing: .15em; }
.main-card { width: min(620px, 100%); margin: 0 auto; padding: 34px; border: 1px solid rgba(255,255,255,.8); border-radius: 32px; background: var(--paper); box-shadow: var(--shadow); backdrop-filter: blur(18px); }
.card-symbol, .upload-symbol { display: inline-grid; place-items: center; color: var(--pink-deep); border-radius: 18px; background: #fff3f5; box-shadow: 0 8px 24px rgba(203,111,140,.13); }
.card-symbol { width: 54px; height: 54px; margin-bottom: 20px; font: 28px/1 sans-serif; }
.pickup-form { display: grid; grid-template-columns: 1fr auto; gap: 12px; }
.code-input { display: flex; align-items: center; gap: 10px; min-width: 0; padding: 0 18px; border: 1px solid var(--line); border-radius: 17px; background: rgba(255,255,255,.7); transition: .2s; }
.code-input:focus-within { border-color: var(--pink); box-shadow: 0 0 0 4px rgba(233,152,172,.12); }
.code-input input { width: 100%; min-width: 0; height: 52px; border: 0; outline: 0; background: transparent; color: var(--ink); text-transform: uppercase; letter-spacing: .2em; }
.code-input input::placeholder { color: #aa9daa; letter-spacing: .05em; }
.primary-button { min-height: 52px; padding: 0 24px; border: 0; border-radius: 17px; background: linear-gradient(135deg, #e995ad, #c77d9f); color: white; font-weight: 700; box-shadow: 0 11px 25px rgba(194,102,136,.22); cursor: pointer; transition: transform .18s, filter .18s; }
.primary-button:hover { transform: translateY(-1px); filter: saturate(1.08); }
.primary-button:disabled { cursor: wait; opacity: .65; transform: none; }
.notice { margin-top: 16px; padding: 11px 14px; border-radius: 13px; background: rgba(235,222,234,.65); color: #725e73; font-size: 14px; }
.notice.error { background: #fff0f1; color: #a3485d; }
.receive-result, .share-results { margin-top: 18px; padding: 18px; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.62); text-align: left; }
.result-heading { margin: 0 0 8px; font-size: 18px; }
.result-meta { margin: 0 0 14px; color: var(--muted); font-size: 14px; }
.result-content { max-height: 230px; overflow: auto; margin: 12px 0; padding: 14px; border-radius: 13px; background: rgba(250,243,248,.8); white-space: pre-wrap; overflow-wrap: anywhere; }
.result-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.soft-button { display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 0 16px; border: 1px solid rgba(201,111,139,.25); border-radius: 12px; background: #fff8fa; color: var(--pink-deep); text-decoration: none; cursor: pointer; }

.send-card { text-align: left; }
.send-form { display: grid; gap: 15px; }
.dropzone { min-height: 138px; padding: 26px; display: flex; align-items: center; justify-content: center; gap: 18px; border: 1.5px dashed rgba(198,122,151,.42); border-radius: 22px; background: rgba(255,249,250,.65); cursor: pointer; text-align: left; transition: .2s; }
.dropzone.dragging { transform: scale(1.01); border-color: var(--pink-deep); background: #fff2f5; }
.upload-symbol { flex: 0 0 auto; width: 50px; height: 50px; font: 26px/1 sans-serif; }
.dropzone strong, .quick-upload strong { display: block; }
.dropzone small, .quick-upload small { display: block; margin-top: 5px; color: var(--muted); }
.or-line { position: relative; text-align: center; color: var(--muted); font-size: 13px; }
.or-line::before { content: ""; position: absolute; top: 50%; left: 0; right: 0; height: 1px; background: var(--line); }
.or-line span { position: relative; padding: 0 12px; background: var(--paper-solid); }
textarea { width: 100%; resize: vertical; min-height: 90px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 16px; outline: 0; background: rgba(255,255,255,.65); color: var(--ink); }
textarea:focus { border-color: var(--pink); box-shadow: 0 0 0 4px rgba(233,152,172,.12); }
.send-actions { display: flex; align-items: end; justify-content: space-between; gap: 15px; }
.send-actions label { display: grid; gap: 7px; color: var(--muted); font-size: 14px; }
select { min-height: 42px; padding: 0 34px 0 12px; border: 1px solid var(--line); border-radius: 12px; background: rgba(255,255,255,.75); color: var(--ink); }
.upload-progress > div { display: flex; justify-content: space-between; margin-bottom: 7px; color: var(--muted); font-size: 13px; }
progress { width: 100%; height: 9px; border: 0; border-radius: 999px; overflow: hidden; background: #f0e6ed; }
progress::-webkit-progress-bar { background: #f0e6ed; }
progress::-webkit-progress-value { background: linear-gradient(90deg, #e995ad, #a99bca); }
.share-item + .share-item { margin-top: 13px; padding-top: 13px; border-top: 1px solid var(--line); }
.share-code { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.share-code strong { color: var(--pink-deep); font: 700 26px/1.1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .12em; }

.quick-upload { width: min(590px, calc(100% - 24px)); margin: 20px auto 0; padding: 16px 22px; display: flex; align-items: center; justify-content: center; gap: 14px; border: 1px solid rgba(255,255,255,.75); border-radius: 22px; background: rgba(255,253,251,.72); color: var(--ink); box-shadow: 0 13px 35px rgba(105,76,96,.1); backdrop-filter: blur(14px); cursor: pointer; text-align: left; }
.quick-upload .upload-symbol { width: 42px; height: 42px; font-size: 21px; }
.privacy-note { display: flex; align-items: center; justify-content: center; gap: 7px; margin: 20px 0 0; color: #8e818e; font-size: 14px; }
.privacy-note span:first-child { color: var(--pink-deep); font-size: 19px; }
.manage-link { display: inline-block; margin-top: 8px; color: #9a8c99; font-size: 12px; text-decoration: none; opacity: .75; }

.is-dark { --paper: rgba(48,39,52,.88); --paper-solid: #392f3c; --ink: #f3e9f0; --muted: #bcaeb9; --line: rgba(255,255,255,.12); --shadow: 0 24px 70px rgba(24,17,26,.38); background: #281f2d; }
.is-dark .art-layer { opacity: .25; filter: saturate(.75); }
.is-dark .site-header { background: rgba(42,32,47,.62); }
.is-dark .mode-nav, .is-dark .language, .is-dark .theme-toggle, .is-dark .code-input, .is-dark textarea, .is-dark select, .is-dark .dropzone, .is-dark .quick-upload, .is-dark .receive-result, .is-dark .share-results { background: rgba(52,42,57,.8); }
.is-dark .or-line span { background: var(--paper-solid); }
.is-dark .result-content { background: rgba(32,25,35,.72); }

@media (max-width: 760px) {
  .site-header { height: auto; min-height: 72px; padding: 11px 16px; grid-template-columns: 1fr auto; }
  .brand { font-size: 17px; }
  .brand-mark { width: 40px; }
  .mode-nav { order: 3; grid-column: 1 / -1; margin: 8px auto 0; }
  .mode-nav button { min-width: 112px; padding: 8px 15px; }
  .hero { padding-top: 34px; }
  .hero-copy h1 { font-size: 35px; letter-spacing: .04em; }
  .hero-copy p { margin-bottom: 24px; font-size: 13px; }
  .main-card { padding: 24px 18px; border-radius: 25px; }
  .pickup-form { grid-template-columns: 1fr; }
  .pickup-form .primary-button { width: 100%; }
  .send-actions { align-items: stretch; flex-direction: column; }
  .send-actions .primary-button { width: 100%; }
  .quick-upload { padding: 14px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}