:root {
  --paper:   #E4E6DF;
  --slip:    #FCFCFA;
  --ink:     #16212B;
  --muted:   #6C7681;
  --rule:    #CBCDC2;
  --stamp:   #B33A2B;
  --text-tag:#1F6F6B;
  --file-tag:#9C6516;

  --sans: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --cond: "IBM Plex Sans Condensed", "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --edge: 1px solid var(--rule);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  background-image:
    linear-gradient(transparent 0 27px, rgba(22,33,43,.035) 27px 28px);
  background-size: 100% 28px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ---------------------------------------------------------- type bits */

.wordmark {
  font-family: var(--cond);
  font-weight: 700;
  font-size: 28px;
  letter-spacing: .16em;
  text-transform: uppercase;
  margin: 0;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 4px 0 0;
}

/* ---------------------------------------------------------- the slip */

.perf {
  position: absolute;
  inset: 0 auto 0 0;
  width: 14px;
  border-right: 1px dashed var(--rule);
  background:
    radial-gradient(circle at 7px 7px, var(--paper) 3px, transparent 3.5px)
    0 0 / 14px 14px repeat-y;
}

.slip, .gate-slip {
  position: relative;
  background: var(--slip);
  border: var(--edge);
  box-shadow: 0 1px 0 rgba(22,33,43,.06);
}

.slip-body, .gate-body { padding: 14px 16px 14px 26px; }

/* ---------------------------------------------------------- gate */

.gate {
  display: grid;
  place-items: center;
  padding: 24px;
}
.gate-slip { width: min(400px, 100%); }
.gate-body { padding: 30px 30px 26px 42px; }
.gate-note { color: var(--muted); margin: 14px 0 22px; font-size: 14px; }

.field-label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}

.code-input {
  width: 100%;
  padding: 11px 12px;
  font-family: var(--mono);
  font-size: 17px;
  letter-spacing: .18em;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--ink);
  border-radius: 0;
  margin-bottom: 14px;
}
.code-input:focus { outline: 2px solid var(--stamp); outline-offset: 1px; }

.gate-error {
  color: var(--stamp);
  font-family: var(--mono);
  font-size: 12px;
  min-height: 1.2em;
  margin: 14px 0 0;
}

/* ---------------------------------------------------------- chrome */

.masthead {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  max-width: 820px;
  margin: 0 auto;
  padding: 34px 20px 20px;
}

.board { max-width: 820px; margin: 0 auto; padding: 0 20px 80px; }

.rail {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 30px 0 14px;
}
.rail-label, .rail-count {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}
.rail-line { flex: 1; height: 1px; background: var(--rule); }

/* ---------------------------------------------------------- composer */

.composer {
  position: relative;
  background: var(--slip);
  border: 1px solid var(--ink);
  box-shadow: 4px 4px 0 rgba(22,33,43,.10);
}

.pad {
  display: block;
  width: 100%;
  padding: 16px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.6;
  resize: vertical;
  min-height: 118px;
}
.pad:focus { outline: none; }
.pad::placeholder { color: #A6ADB3; }

.composer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  padding: 10px 12px;
  border-top: 1px dashed var(--rule);
  background: #F5F5F1;
}
.composer-hints {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}
.composer-hints .dot { margin: 0 6px; }
.composer-actions { display: flex; gap: 8px; }

.drop-veil {
  position: absolute;
  inset: 0;
  display: none;
  place-items: center;
  background: rgba(179,58,43,.06);
  border: 2px dashed var(--stamp);
  font-family: var(--cond);
  font-size: 20px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--stamp);
  pointer-events: none;
}
.composer.dragging .drop-veil { display: grid; }

/* ---------------------------------------------------------- buttons */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-family: var(--cond);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: transform .08s ease, background .12s ease, color .12s ease;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 2px solid var(--stamp); outline-offset: 2px; }

.btn-solid { background: var(--ink); color: var(--slip); }
.btn-solid:hover { background: #263644; }
.btn-quiet { border-color: var(--rule); color: var(--muted); background: #fff; }
.btn-quiet:hover { border-color: var(--ink); color: var(--ink); }
.btn-ghost { border-color: transparent; color: var(--muted); padding: 8px 6px; }
.btn-ghost:hover { color: var(--stamp); }
.btn-wide { width: 100%; justify-content: center; padding: 11px; }

.btn-stamp { border-color: var(--stamp); color: var(--stamp); }
.btn-stamp:hover { background: var(--stamp); color: var(--slip); }

.icon-btn {
  background: none;
  border: 0;
  padding: 2px 4px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
  cursor: pointer;
}
.icon-btn:hover { color: var(--ink); }
.icon-btn.danger:hover { color: var(--stamp); }
.icon-btn.on { color: var(--stamp); font-weight: 600; }

/* ---------------------------------------------------------- slips */

.slips { display: flex; flex-direction: column; gap: 12px; }

.slip { animation: land .18s ease-out; overflow: hidden; }
@keyframes land {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: none; }
}

.slip-head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding-bottom: 9px;
  border-bottom: 1px dashed var(--rule);
}

.tag {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: 2px 6px;
  border: 1px solid currentColor;
  color: var(--text-tag);
}
.tag.file { color: var(--file-tag); }

.serial {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink);
  letter-spacing: .06em;
}
.meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}
.slip-tools { margin-left: auto; display: flex; gap: 10px; }

.slip-content { padding: 12px 0; }

.slip-content pre {
  margin: 0;
  max-height: 260px;
  overflow: auto;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--ink);
}

.thumb {
  max-height: 220px;
  max-width: 100%;
  border: var(--edge);
  display: block;
}

.filecard {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--mono);
  font-size: 13px;
}
.filecard .fname { font-weight: 500; word-break: break-all; }
.filecard .fsize { color: var(--muted); font-size: 11px; white-space: nowrap; }

.slip-foot { display: flex; gap: 8px; }

.stamped {
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%) rotate(-11deg) scale(1.3);
  font-family: var(--cond);
  font-weight: 700;
  font-size: 30px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--stamp);
  border: 3px solid var(--stamp);
  padding: 2px 12px;
  opacity: 0;
  pointer-events: none;
}
.slip.stamp .stamped { animation: stamp 1.1s ease-out; }
@keyframes stamp {
  0%   { opacity: 0; transform: translateY(-50%) rotate(-11deg) scale(1.5); }
  12%  { opacity: .85; transform: translateY(-50%) rotate(-11deg) scale(1); }
  70%  { opacity: .85; }
  100% { opacity: 0; }
}

.empty {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  padding: 40px 0;
}

/* ---------------------------------------------------------- toast */

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%, 20px);
  background: var(--ink);
  color: var(--slip);
  font-family: var(--mono);
  font-size: 12.5px;
  padding: 9px 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .16s ease, transform .16s ease;
  z-index: 20;
  max-width: 90vw;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast.bad { background: var(--stamp); }

/* ---------------------------------------------------------- small screens */

@media (max-width: 620px) {
  .masthead { padding-top: 22px; }
  .wordmark { font-size: 22px; }
  .composer-hints { display: none; }
  .composer-actions { width: 100%; }
  .composer-actions .btn { flex: 1; justify-content: center; }
  .slip-tools { width: 100%; margin-left: 0; justify-content: flex-end; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .slip.stamp .stamped { opacity: .85; }
}