:root {
  --bg: #0a0b0d;
  --bg-2: #101216;
  --panel: #14171c;
  --panel-2: #191d24;
  --line: #262b34;
  --line-2: #333a45;
  --ink: #e6e9ee;
  --ink-dim: #9aa3b2;
  --ink-faint: #5c6572;
  --signal: #7dfca3;
  --signal-dim: #3a9d5c;
  --warn: #ffcf6b;
  --danger: #ff7a7a;
  --mono: "SF Mono", "JetBrains Mono", "Fira Code", ui-monospace, "Menlo", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
  --radius: 14px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(125, 252, 163, 0.05), transparent 60%),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  line-height: 1.5;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}

/* Header / brand */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.mark {
  width: 34px; height: 34px;
  border: 1.5px solid var(--signal);
  border-radius: 9px;
  display: grid; place-items: center;
  color: var(--signal);
  font-family: var(--mono);
  font-weight: 700;
  position: relative;
  box-shadow: 0 0 24px rgba(125, 252, 163, 0.15), inset 0 0 12px rgba(125,252,163,0.08);
}
.mark::after {
  content: ""; position: absolute; inset: 5px;
  border: 1px dashed rgba(125,252,163,0.35); border-radius: 5px;
}
.brand h1 {
  font-size: 20px; margin: 0; letter-spacing: -0.02em; font-weight: 650;
}
.brand h1 span { color: var(--ink-faint); font-weight: 400; }
.tag {
  color: var(--ink-dim); font-size: 14.5px; margin: 0 0 32px;
  max-width: 56ch;
}
.tag b { color: var(--signal); font-weight: 600; }

/* Panel */
.panel {
  background: linear-gradient(180deg, var(--panel-2), var(--panel));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 24px 60px -30px rgba(0,0,0,0.9);
}
.panel + .panel { margin-top: 18px; }

label.field-label {
  display: block;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 10px;
}

textarea, input[type=text] {
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--line);
  color: var(--ink);
  border-radius: 10px;
  padding: 14px 15px;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.55;
  resize: vertical;
  transition: border-color 0.15s, box-shadow 0.15s;
}
textarea { min-height: 210px; }
textarea:focus, input:focus {
  outline: none;
  border-color: var(--signal-dim);
  box-shadow: 0 0 0 3px rgba(125,252,163,0.10);
}
textarea::placeholder { color: var(--ink-faint); }

.row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 18px; }
.control { flex: 1 1 200px; }

.seg {
  display: flex; gap: 6px; background: var(--bg-2);
  border: 1px solid var(--line); border-radius: 10px; padding: 5px;
}
.seg button {
  flex: 1; background: transparent; border: 0; color: var(--ink-dim);
  font-family: var(--mono); font-size: 12.5px; padding: 8px 4px;
  border-radius: 7px; cursor: pointer; transition: all 0.12s;
}
.seg button:hover { color: var(--ink); }
.seg button[aria-pressed="true"] {
  background: var(--panel-2); color: var(--signal);
  box-shadow: inset 0 0 0 1px var(--line-2);
}

.toggle {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-2); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px 14px; cursor: pointer;
  user-select: none;
}
.toggle .sw {
  width: 40px; height: 23px; border-radius: 999px; background: var(--line-2);
  position: relative; transition: background 0.15s; flex: none;
}
.toggle .sw::after {
  content: ""; position: absolute; top: 2px; left: 2px;
  width: 19px; height: 19px; border-radius: 50%; background: var(--ink-dim);
  transition: transform 0.15s, background 0.15s;
}
.toggle[aria-checked="true"] .sw { background: rgba(255,122,122,0.25); }
.toggle[aria-checked="true"] .sw::after { transform: translateX(17px); background: var(--danger); }
.toggle .txt { font-size: 13.5px; }
.toggle .txt small { display: block; color: var(--ink-faint); font-size: 12px; }

.actions { margin-top: 22px; display: flex; gap: 12px; align-items: center; }
button.primary {
  background: var(--signal); color: #04120a; border: 0;
  font-family: var(--sans); font-weight: 650; font-size: 14.5px;
  padding: 13px 22px; border-radius: 10px; cursor: pointer;
  transition: transform 0.08s, box-shadow 0.15s, opacity 0.15s;
  box-shadow: 0 8px 24px -8px rgba(125,252,163,0.5);
}
button.primary:hover { box-shadow: 0 10px 30px -8px rgba(125,252,163,0.65); }
button.primary:active { transform: translateY(1px); }
button.primary:disabled { opacity: 0.5; cursor: not-allowed; box-shadow: none; }
button.ghost {
  background: transparent; border: 1px solid var(--line-2); color: var(--ink-dim);
  padding: 12px 18px; border-radius: 10px; cursor: pointer; font-size: 14px;
  font-family: var(--sans); transition: all 0.12s;
}
button.ghost:hover { color: var(--ink); border-color: var(--ink-faint); }

.meta-line {
  font-family: var(--mono); font-size: 12px; color: var(--ink-faint);
  margin-left: auto;
}

/* Result / link box */
.result { display: none; }
.result.show { display: block; animation: rise 0.3s ease; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.linkbox {
  display: flex; gap: 10px; align-items: stretch;
  background: var(--bg-2); border: 1px solid var(--signal-dim);
  border-radius: 10px; padding: 6px 6px 6px 14px;
  box-shadow: 0 0 0 3px rgba(125,252,163,0.06);
}
.linkbox input {
  border: 0; background: transparent; color: var(--signal);
  padding: 8px 0; font-size: 13px;
}
.linkbox input:focus { box-shadow: none; }
.copybtn {
  background: var(--signal); color: #04120a; border: 0; border-radius: 7px;
  padding: 0 16px; font-family: var(--sans); font-weight: 650; cursor: pointer;
  font-size: 13px;
}
.copybtn.ok { background: var(--signal-dim); color: var(--ink); }

.notes { margin-top: 14px; }
.note {
  display: flex; gap: 9px; align-items: flex-start;
  font-size: 13px; color: var(--ink-dim); padding: 4px 0;
}
.note .dot { color: var(--signal); font-family: var(--mono); margin-top: 1px; }
.note.warn .dot { color: var(--danger); }

/* Viewer */
.state { text-align: center; padding: 20px 10px; }
.state .big { font-size: 15px; color: var(--ink-dim); }
.reveal-card { text-align: center; }
.reveal-card .lock {
  font-size: 40px; margin-bottom: 6px; filter: grayscale(0.1);
}
.plaintext {
  white-space: pre-wrap; word-break: break-word;
  background: var(--bg-2); border: 1px solid var(--line);
  border-radius: 10px; padding: 16px; font-family: var(--mono);
  font-size: 13.5px; text-align: left; color: var(--ink);
  max-height: 60vh; overflow: auto;
}
.badge {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.05em;
  padding: 5px 11px; border-radius: 999px; border: 1px solid var(--line-2);
  color: var(--ink-dim); background: var(--bg-2);
}
.badge.burn { color: var(--danger); border-color: rgba(255,122,122,0.3); }
.badge.time { color: var(--warn); border-color: rgba(255,207,107,0.25); }

.counter {
  margin-top: 26px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
}
.counter .stat {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 12px; padding: 16px 14px; text-align: center;
}
.counter .stat b {
  display: block; font-family: var(--mono); font-size: 24px; font-weight: 600;
  color: var(--signal); letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}
.counter .stat span {
  display: block; margin-top: 4px; font-size: 11.5px; color: var(--ink-faint);
  font-family: var(--mono); letter-spacing: 0.03em;
}
@media (max-width: 480px) {
  .counter .stat b { font-size: 20px; }
  .counter .stat span { font-size: 10.5px; }
}

.seo {
  margin-top: 56px; color: var(--ink-dim); font-size: 15px; line-height: 1.65;
}
.seo h2 {
  color: var(--ink); font-size: 19px; letter-spacing: -0.01em;
  margin: 34px 0 12px; font-weight: 640;
}
.seo h2:first-child { margin-top: 0; }
.seo p { margin: 0 0 14px; max-width: 64ch; }
.seo b { color: var(--ink); font-weight: 600; }
.seo code {
  font-family: var(--mono); font-size: 13px; background: var(--bg-2);
  border: 1px solid var(--line); padding: 1px 6px; border-radius: 5px; color: var(--signal);
}
.seo ol.steps { margin: 0; padding-left: 22px; }
.seo ol.steps li { margin: 0 0 9px; padding-left: 4px; }
.seo ul.uses { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.seo ul.uses li {
  padding: 11px 14px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 9px; font-size: 14px;
}
.seo ul.uses li::before { content: "▸ "; color: var(--signal); }
.faq details {
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 2px 16px; margin: 0 0 9px;
}
.faq summary {
  cursor: pointer; padding: 13px 0; color: var(--ink); font-weight: 550;
  font-size: 14.5px; list-style: none; position: relative; padding-right: 24px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 0; top: 12px; color: var(--ink-faint);
  font-family: var(--mono); font-size: 18px;
}
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0 0 14px; font-size: 14px; color: var(--ink-dim); }

.footer {
  margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  color: var(--ink-faint); font-size: 12.5px; font-family: var(--mono);
}
.footer a { color: var(--ink-dim); text-decoration: none; }
.footer a:hover { color: var(--signal); }

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(80px);
  background: var(--panel-2); border: 1px solid var(--line-2); color: var(--ink);
  padding: 11px 18px; border-radius: 10px; font-size: 13.5px;
  box-shadow: 0 20px 50px -20px #000; transition: transform 0.25s; z-index: 50;
}
.toast.show { transform: translateX(-50%) translateY(0); }
.err { color: var(--danger); }
.hidden { display: none !important; }