:root {
  --bg: #0d0f17;
  --bg-glow-1: rgba(124, 108, 255, .22);
  --bg-glow-2: rgba(47, 209, 197, .14);
  --card: rgba(23, 26, 38, .82);
  --card-border: rgba(255, 255, 255, .08);
  --field: rgba(255, 255, 255, .04);
  --field-border: rgba(255, 255, 255, .12);
  --text: #eceef6;
  --muted: #9298ad;
  --accent: #7c6cff;
  --accent-2: #2fd1c5;
  --accent-text: #ffffff;
  --danger: #ff6b81;
  --warn: #f2b84b;
  --ok: #3ddc97;
  --shadow: 0 24px 60px -24px rgba(0, 0, 0, .65);
  --radius: 18px;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f5fb;
    --bg-glow-1: rgba(124, 108, 255, .16);
    --bg-glow-2: rgba(47, 209, 197, .14);
    --card: rgba(255, 255, 255, .9);
    --card-border: rgba(20, 24, 50, .08);
    --field: rgba(20, 24, 50, .03);
    --field-border: rgba(20, 24, 50, .14);
    --text: #171a2c;
    --muted: #61677f;
    --accent: #5b4fd6;
    --accent-2: #129e95;
    --danger: #d43a55;
    --warn: #a86f00;
    --ok: #16935e;
    --shadow: 0 24px 60px -30px rgba(30, 30, 80, .35);
    color-scheme: light;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; min-height: 100%; background: var(--bg); }
body {
  margin: 0; min-height: 100vh; color: var(--text); background-color: var(--bg);
  background-image: radial-gradient(60rem 40rem at 10% -10%, var(--bg-glow-1), transparent 60%), radial-gradient(50rem 36rem at 110% 10%, var(--bg-glow-2), transparent 60%);
  background-repeat: no-repeat;
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent-2); }
h1, h2 { margin: 0 0 10px; line-height: 1.2; letter-spacing: -.02em; }
h1 { font-size: clamp(26px, 4.4vw, 38px); font-weight: 700; }
h2 { font-size: 24px; font-weight: 650; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
[hidden] { display: none !important; }

.topbar { display: flex; align-items: center; gap: 18px; max-width: 980px; margin: 0 auto; padding: 18px 20px; }
.back-home { color: var(--muted); text-decoration: none; font-size: 14px; }
.back-home:hover { color: var(--text); }
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 18px; letter-spacing: -.01em; }
.brand-icon { width: 26px; height: 26px; padding: 4px; border-radius: 8px; background: linear-gradient(135deg, var(--accent), var(--accent-2)); fill: none; stroke: #fff; stroke-width: 2; stroke-linecap: round; }
.spacer { flex: 1; }
.user { color: var(--muted); font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 30vw; }

main { max-width: 760px; margin: 0 auto; padding: 18px 20px 80px; }
.card { background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius); box-shadow: var(--shadow); padding: clamp(22px, 4vw, 36px); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.card.narrow { max-width: 540px; margin: 6vh auto 0; }
.center { text-align: center; }
#view-loading { display: grid; place-items: center; min-height: 220px; max-width: 540px; margin: 6vh auto 0; }
.intro { margin: 3vh 0 22px; }
.eyebrow { margin: 0 0 8px; color: var(--accent-2); font-size: 12px; font-weight: 700; letter-spacing: .14em; }
.lead { color: var(--muted); font-size: 17px; margin: 0 0 8px; }
.meta { color: var(--muted); font-size: 13px; margin: 6px 0 0; }
.right { text-align: right; }
.links { margin-top: 18px; }
.divider { display: flex; align-items: center; gap: 12px; margin: 22px 0 18px; color: var(--muted); font-size: 13px; }
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--field-border); }
.hint { margin: 16px 0 0; padding: 12px 14px; border-radius: 12px; background: var(--field); border: 1px solid var(--field-border); color: var(--muted); font-size: 14px; }
.error { min-height: 1.4em; margin: 12px 0 0; color: var(--danger); font-size: 14px; }
.error:empty { min-height: 0; margin: 0; }

label { display: grid; gap: 7px; margin: 0 0 16px; font-size: 14px; font-weight: 600; }
.field-label { display: block; margin: 0 0 8px; font-size: 14px; font-weight: 600; }
.optional { color: var(--muted); font-weight: 400; margin-left: 4px; }
input[type="text"], input[type="password"], input[type="email"], textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--field-border); border-radius: 12px; background: var(--field); color: var(--text);
  font: inherit; font-weight: 400; transition: border-color .15s, box-shadow .15s;
}
textarea { resize: vertical; min-height: 120px; }
input:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 22%, transparent); }
.counter { margin: 6px 0 20px; text-align: right; color: var(--muted); font-size: 12px; }

button, .button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 11px 18px; border-radius: 12px; border: 1px solid transparent;
  font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; transition: transform .08s, filter .15s, background .15s, border-color .15s;
}
button:active { transform: translateY(1px); }
button:disabled { opacity: .55; cursor: progress; }
button:focus-visible, .button:focus-visible, .dropzone:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 55%, transparent); outline-offset: 2px; }
.primary { color: var(--accent-text); background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 55%, var(--accent-2))); box-shadow: 0 10px 24px -12px var(--accent); }
.primary:hover { filter: brightness(1.08); }
.primary.done { background: var(--ok); }
.big { width: 100%; padding: 15px 20px; font-size: 16px; margin-top: 8px; }
.quiet { color: var(--text); background: var(--field); border-color: var(--field-border); }
.quiet:hover { border-color: var(--accent); }
.quiet.done { border-color: var(--ok); color: var(--ok); }
.small { padding: 7px 12px; font-size: 14px; }
.actions { display: flex; justify-content: center; margin-top: 22px; }

.dropzone {
  display: grid; justify-items: center; gap: 6px; padding: 28px 18px; border: 1.5px dashed var(--field-border); border-radius: 16px; background: var(--field);
  text-align: center; cursor: pointer; transition: border-color .15s, background .15s;
}
.dropzone svg { width: 34px; height: 34px; fill: none; stroke: var(--accent-2); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.dropzone small { color: var(--muted); }
.dropzone:hover, .dropzone.over { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 9%, transparent); }
.dropzone.full { opacity: .5; pointer-events: none; }

.file-list { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 8px; }
.file-row { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 12px; background: var(--field); border: 1px solid var(--field-border); }
.file-icon { flex: none; width: 34px; height: 34px; border-radius: 9px; background: color-mix(in srgb, var(--accent) 18%, transparent); position: relative; }
.file-icon::after { content: "▤"; position: absolute; inset: 0; display: grid; place-items: center; color: var(--accent); font-size: 17px; }
.file-icon[data-kind="image"]::after { content: "▨"; color: var(--accent-2); }
.file-copy { display: grid; min-width: 0; flex: 1; }
.file-name { font-size: 14px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-meta { color: var(--muted); font-size: 12px; }
.file-row[data-state="clean"] .file-meta { color: var(--ok); }
.file-row[data-state="kept"] .file-meta { color: var(--warn); }
.remove { flex: none; width: 32px; height: 32px; padding: 0; border-radius: 9px; color: var(--muted); background: transparent; }
.remove:hover { color: var(--danger); background: var(--field); }
#file-total { margin: 8px 2px 0; }

.expiry { border: 0; padding: 0; margin: 24px 0 20px; }
.segments { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; padding: 5px; border-radius: 14px; background: var(--field); border: 1px solid var(--field-border); }
.segments label { margin: 0; display: block; }
.segments input { position: absolute; opacity: 0; pointer-events: none; }
.segments span { display: block; padding: 9px 4px; border-radius: 10px; text-align: center; font-size: 14px; font-weight: 600; color: var(--muted); cursor: pointer; transition: background .15s, color .15s; }
.segments input:checked + span { color: var(--accent-text); background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 55%, var(--accent-2))); }
.segments input:focus-visible + span { outline: 3px solid color-mix(in srgb, var(--accent) 55%, transparent); }

.toggle { display: flex; align-items: center; gap: 12px; margin: 0 0 14px; cursor: pointer; font-weight: 600; }
.toggle input { position: absolute; opacity: 0; }
.switch { flex: none; width: 42px; height: 24px; border-radius: 99px; background: var(--field-border); position: relative; transition: background .15s; }
.switch::after { content: ""; position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; border-radius: 50%; background: #fff; transition: transform .15s; box-shadow: 0 1px 3px rgba(0,0,0,.3); }
.toggle input:checked + .switch { background: var(--accent); }
.toggle input:checked + .switch::after { transform: translateX(18px); }
.toggle input:focus-visible + .switch { outline: 3px solid color-mix(in srgb, var(--accent) 55%, transparent); outline-offset: 2px; }
.password-fields { margin: 0 0 12px; }
.password-input { position: relative; display: block; }
.password-input input { padding-right: 48px; }
.reveal { position: absolute; right: 6px; top: 50%; transform: translateY(-50%); width: 36px; height: 36px; padding: 0; color: var(--muted); background: transparent; font-size: 15px; }
.reveal.on { color: var(--accent-2); }

.help { margin: 18px 4px 0; color: var(--muted); font-size: 14px; }
.card .help { margin: 18px 0 0; }
.help summary { cursor: pointer; font-weight: 600; color: var(--text); }
.help ul { margin: 10px 0 0; padding-left: 20px; display: grid; gap: 6px; }
.help label { margin-top: 12px; }

.bar { height: 10px; border-radius: 99px; background: var(--field); border: 1px solid var(--field-border); overflow: hidden; margin: 18px 0 4px; }
.bar span { display: block; height: 100%; width: 0; border-radius: 99px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .2s ease; }
.progress-title { margin: 0; font-size: 20px; font-weight: 650; }
.progress-block { margin-top: 18px; }

.seal { width: 64px; height: 64px; margin: 0 0 18px; display: grid; place-items: center; border-radius: 20px; background: linear-gradient(135deg, var(--accent), var(--accent-2)); box-shadow: 0 16px 34px -16px var(--accent); }
.center .seal { margin-left: auto; margin-right: auto; }
.seal svg { width: 32px; height: 32px; fill: none; stroke: #fff; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.seal.muted { background: var(--field); border: 1px solid var(--field-border); box-shadow: none; }
.seal.muted svg { stroke: var(--muted); }
.seal.ok { background: linear-gradient(135deg, var(--ok), var(--accent-2)); }
.receive form { margin-top: 22px; }

.linkbox { display: flex; gap: 8px; margin: 16px 0 0; font-weight: 400; }
.linkbox input { flex: 1; min-width: 0; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 14px; }
.linkbox button { flex: none; }
.help .linkbox { margin-top: 0; }

.message { margin-top: 3vh; }
.burned { display: flex; align-items: center; gap: 10px; margin: 0 0 14px; padding: 12px 16px; border-radius: 14px; color: var(--warn); background: color-mix(in srgb, var(--warn) 12%, transparent); border: 1px solid color-mix(in srgb, var(--warn) 30%, transparent); font-size: 14px; font-weight: 600; }
.burned svg { flex: none; width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linejoin: round; }
.note { white-space: pre-wrap; overflow-wrap: anywhere; font-size: 17px; line-height: 1.6; }
.note + .attachments { margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--card-border); }
.attachments { list-style: none; margin: 0; padding: 0; display: grid; gap: 20px; }
.attachment-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.attachment-title { display: grid; min-width: 0; }
.attachment-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.attachment .meta { margin: 0; }
.preview-image { display: block; max-width: 100%; max-height: 80vh; margin: 0 auto; border-radius: 12px; background: var(--field); }
.preview-text { margin: 0; max-height: 60vh; overflow: auto; padding: 14px; border-radius: 12px; background: var(--field); border: 1px solid var(--field-border); font: 13px/1.5 ui-monospace, SFMono-Regular, Consolas, monospace; white-space: pre-wrap; overflow-wrap: anywhere; }

.spinner { width: 38px; height: 38px; border-radius: 50%; border: 3px solid var(--field-border); border-top-color: var(--accent); animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation-duration: 3s !important; } }

@media (max-width: 560px) {
  .topbar { gap: 12px; padding: 14px 16px; }
  .back-home { display: none; }
  main { padding: 10px 16px 60px; }
  .segments { gap: 3px; padding: 4px; }
  .segments span { padding: 9px 2px; font-size: 13px; }
  .linkbox { flex-direction: column; }
  .card.narrow { margin-top: 3vh; }
}