/* Onepage Desk: a proofing desk, not a chat app. Paper and ink, a red editor's pencil
   for what runs over, a green stamp when the page fits. */

@font-face {
  font-family: "Source Sans 3";
  src: url("fonts/SourceSans3-VF.ttf");
  font-weight: 200 900;
  font-style: normal;
}
@font-face {
  font-family: "Source Sans 3";
  src: url("fonts/SourceSans3-Italic-VF.ttf");
  font-weight: 200 900;
  font-style: italic;
}

:root {
  --desk: #e7e1d4;
  --desk-dot: rgba(27, 26, 23, 0.09);
  --paper: #fbf9f4;
  --paper-2: #f3efe5;
  --ink: #1b1a17;
  --ink-2: #3b3934;
  --muted: #736d64;
  --hair: rgba(27, 26, 23, 0.14);
  --hair-strong: rgba(27, 26, 23, 0.32);
  --pencil: #c8411d;
  --pencil-soft: #f5dbd1;
  --spruce: #2b6a4e;
  --spruce-soft: #d5e9de;
  --marker: #f2df7c;
  --display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --sans: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --masthead-h: 56px;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--desk);
  color: var(--ink);
  font: 16px/1.45 var(--sans);
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; color: inherit; }
[hidden] { display: none !important; }
kbd { font: 500 11px/1 var(--mono); opacity: 0.7; margin-left: 4px; }

/* -- masthead ----------------------------------------------------------------------- */

.masthead {
  height: var(--masthead-h);
  display: flex; align-items: center; gap: 24px;
  padding: 0 24px;
  background: var(--paper);
  border-bottom: 3px double var(--ink);
}
.wordmark {
  display: inline-flex; align-items: center; gap: 10px;
  font: 600 24px/1 var(--display); letter-spacing: -0.01em;
  color: var(--ink); text-decoration: none;
}
.wordmark em { font-style: italic; font-weight: 400; }
.wordmark-text { white-space: nowrap; }
.wordmark-mark {
  width: 18px; height: 23px; position: relative;
  border: 1.5px solid var(--ink); border-radius: 1px; background: var(--paper);
}
.wordmark-mark::before {  /* a folded corner */
  content: ""; position: absolute; top: -1.5px; right: -1.5px; width: 7px; height: 7px;
  background: linear-gradient(225deg, var(--desk) 50%, var(--ink) 50% 56%, var(--paper-2) 56%);
}
.wordmark-mark::after {  /* one line of text, in pencil */
  content: ""; position: absolute; left: 3px; right: 3px; bottom: 5px; height: 1.5px; background: var(--pencil);
}
.masthead-doc { display: flex; align-items: baseline; gap: 12px; }
.masthead-type { font: italic 400 19px/1 var(--display); }
.state-pill {
  font: 500 11px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase;
  padding: 5px 8px; border: 1px solid var(--hair-strong); border-radius: 2px; color: var(--ink-2);
}
.state-pill[data-state="editing"] { border-color: var(--spruce); color: var(--spruce); }
.state-pill[data-state="confirming"] { border-color: var(--pencil); color: var(--pencil); }
.masthead-right { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.model-tag { font: 400 12px/1 var(--mono); color: var(--muted); }
.model-tag::before { content: "● "; color: var(--spruce); }

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

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px; border-radius: 3px; border: 1px solid transparent;
  font: 600 14px/1 var(--sans); letter-spacing: 0.01em; cursor: pointer;
  transition: transform 0.08s ease, background 0.15s ease, opacity 0.15s ease;
}
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: 0.4; cursor: default; }
.btn:focus-visible, .chip:focus-visible, .sheet:focus-visible, .row-btn:focus-visible {
  outline: 2px solid var(--pencil); outline-offset: 2px;
}
.btn-ink { background: var(--ink); color: var(--paper); }
.btn-ink:hover:not(:disabled) { background: var(--ink-2); }
.btn-quiet { background: transparent; border-color: var(--hair-strong); color: var(--ink); }
.btn-quiet:hover:not(:disabled) { background: var(--paper-2); }
.btn-pencil { background: var(--pencil); color: #fff; }
.btn-pencil:hover:not(:disabled) { filter: brightness(1.06); }
.btn-stamp {
  background: transparent; color: var(--spruce); border: 2px solid var(--spruce);
  font: 600 12px/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; padding: 9px 14px;
}
.btn-stamp:hover:not(:disabled) { background: var(--spruce-soft); }

/* -- home: the empty desk ------------------------------------------------------------- */

.home {
  min-height: calc(100vh - var(--masthead-h));
  padding: 56px 24px 40px;
  background-image: radial-gradient(var(--desk-dot) 1px, transparent 1.2px);
  background-size: 18px 18px;
}
.home-intro { max-width: 760px; margin: 0 auto 40px; text-align: center; }
.kicker { font: 500 12px/1 var(--mono); letter-spacing: 0.16em; text-transform: uppercase; color: var(--pencil); margin: 0 0 14px; }
.home h1 { font: 500 clamp(36px, 5vw, 56px)/1.05 var(--display); letter-spacing: -0.02em; margin: 0 0 16px; }
.lede { font-size: 18px; color: var(--ink-2); margin: 0 auto; max-width: 620px; }
.sheets { display: flex; justify-content: center; gap: 36px; flex-wrap: wrap; }
.sheet-card { width: 236px; display: flex; flex-direction: column; align-items: center; gap: 14px; }
.sheet {
  width: 100%; aspect-ratio: 8.5 / 11; position: relative; cursor: pointer;
  display: flex; flex-direction: column; justify-content: flex-start; align-items: stretch;
  background: var(--paper); border: 1px solid var(--hair); border-radius: 2px; padding: 26px 22px;
  box-shadow: 0 1px 0 var(--hair), 0 14px 30px -18px rgba(27, 26, 23, 0.45);
  transition: transform 0.2s ease, box-shadow 0.2s ease; text-align: left;
}
.sheet:hover { transform: translateY(-6px) rotate(-0.6deg); box-shadow: 0 1px 0 var(--hair), 0 22px 40px -20px rgba(27, 26, 23, 0.55); }
.sheet .sheet-name { font: 500 22px/1.1 var(--display); margin: 0 0 4px; }
.sheet .sheet-desc { font-size: 13px; color: var(--muted); margin: 0 0 16px; }
.sheet .lines { position: absolute; left: 22px; right: 22px; top: 96px; bottom: 44px; overflow: hidden; }
.sheet .lines i { display: block; height: 5px; margin: 0 0 9px; background: var(--paper-2); border-radius: 1px; }
.sheet .lines i.h { height: 7px; width: 42%; background: var(--hair-strong); margin-top: 14px; }
.sheet .lines i.s { width: 70%; }
.sheet .lines i.r { width: 86%; }
.sheet .begin {
  position: absolute; left: 22px; bottom: 20px; font: 600 12px/1 var(--mono); letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--pencil); opacity: 0; transition: opacity 0.2s ease;
}
.sheet:hover .begin, .sheet:focus-visible .begin { opacity: 1; }
.examples { display: flex; flex-direction: column; align-items: stretch; gap: 6px; width: 100%; font-size: 14px; }
.example {
  display: flex; align-items: center; gap: 8px; width: 100%; text-align: left; cursor: pointer;
  background: var(--paper); border: 1px solid var(--hair); border-radius: 2px; padding: 7px 10px; color: var(--ink-2);
}
.example:hover { border-color: var(--ink); color: var(--ink); }
.example-kind {
  font: 500 10px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--spruce);
  border: 1px solid currentColor; padding: 3px 5px; border-radius: 2px; white-space: nowrap;
}
.example.long .example-kind { color: var(--pencil); }
.home-foot { text-align: center; color: var(--muted); font-size: 14px; margin-top: 40px; }

/* -- the desk ------------------------------------------------------------------------- */

.desk {
  height: calc(100vh - var(--masthead-h));
  display: grid; grid-template-columns: minmax(320px, 390px) minmax(0, 1fr) minmax(270px, 320px);
}
.column { min-height: 0; display: flex; flex-direction: column; }
.column-head { display: flex; align-items: baseline; justify-content: space-between; padding: 18px 20px 10px; }
.column-head h2, .card-head h3 {
  font: 500 11px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); margin: 0;
}
.timer { font: 400 12px/1 var(--mono); color: var(--pencil); }

/* conversation: a proofing log */
.log-column { background: var(--paper); border-right: 1px solid var(--hair); }
.log { list-style: none; margin: 0; padding: 0 20px 12px; overflow-y: auto; flex: 1; scroll-behavior: smooth; }
.msg { padding: 12px 0 12px 16px; border-bottom: 1px dashed var(--hair); position: relative; }
.msg .who { font: 500 10px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.msg .text { white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.agent .text { font: 400 16.5px/1.5 var(--display); font-variation-settings: "opsz" 14; }
.msg.agent::before { content: "¶"; position: absolute; left: 0; top: 11px; font: 400 14px/1 var(--display); color: var(--hair-strong); }
.msg.user .text { color: var(--ink-2); }
.msg.user::before { content: "›"; position: absolute; left: 1px; top: 9px; font: 600 16px/1 var(--sans); color: var(--pencil); }
.msg.user.paste .text { font: 400 13px/1.5 var(--mono); max-height: 7.5em; overflow: hidden; color: var(--muted); }
.msg.note { border-bottom-style: solid; border-color: transparent; padding-top: 6px; }
.msg.note .text { font: italic 400 15px/1.45 var(--display); color: var(--pencil); }
.msg.note::before { content: "✎"; position: absolute; left: 0; top: 6px; font-size: 13px; color: var(--pencil); }
.msg.note.good .text, .msg.note.good::before { color: var(--spruce); }
.msg.error .text { color: var(--pencil); font-weight: 600; }
.msg.working .text:empty::after, .msg.working .text::after {
  content: ""; display: inline-block; width: 0.45em; height: 1.05em; margin-left: 2px; vertical-align: -3px;
  background: var(--pencil); animation: blink 1s steps(1) infinite;
}
.msg .status { font: 400 12px/1.3 var(--mono); color: var(--muted); margin-top: 6px; }
@keyframes blink { 50% { opacity: 0; } }

.composer { border-top: 1px solid var(--hair); padding: 12px 20px 16px; background: var(--paper); }
.prompts { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.chip {
  font: 400 12px/1.25 var(--mono); padding: 6px 9px; border: 1px dashed var(--hair-strong); border-radius: 2px;
  background: transparent; cursor: pointer; text-align: left; color: var(--ink-2);
}
.chip:hover { background: var(--marker); border-style: solid; border-color: var(--ink); color: var(--ink); }
/* Suggested replies from the backend: solid, and they act at once (send, paste, create, fit, undo). */
.chip.suggestion { font-family: var(--sans); font-size: 13px; border: 1px solid var(--spruce); color: var(--spruce); background: var(--spruce-soft); }
.chip.suggestion:hover { background: var(--spruce); color: var(--paper); border-color: var(--spruce); }
.selection-chip {
  display: inline-flex; align-items: center; gap: 8px; margin-bottom: 8px; padding: 4px 6px 4px 10px;
  background: var(--marker); font-size: 13px; border-radius: 2px;
}
.chip-x { border: 0; background: none; cursor: pointer; font-size: 16px; line-height: 1; padding: 0 4px; }
.composer-form { display: flex; flex-direction: column; gap: 8px; }
.composer-form textarea {
  width: 100%; resize: none; border: 0; border-bottom: 1.5px solid var(--ink); background: transparent;
  padding: 6px 0 8px; font: 400 16px/1.45 var(--sans); outline: none;
}
.composer-form textarea::placeholder { color: var(--muted); }
.composer-form textarea:focus { border-bottom-color: var(--pencil); }
.composer-actions { display: flex; justify-content: flex-end; gap: 8px; }
.paste-toggle { display: flex; align-items: center; gap: 6px; font: 400 12px/1 var(--mono); color: var(--muted); }
.paste-toggle select { font: 400 12px/1 var(--mono); border: 1px solid var(--hair); background: var(--paper); padding: 2px 4px; }

/* the page on the desk */
.page-column {
  background-image: radial-gradient(var(--desk-dot) 1px, transparent 1.2px);
  background-size: 18px 18px;
}
.page-toolbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 12px 22px; border-bottom: 1px solid var(--hair); background: rgba(251, 249, 244, 0.65);
}
.toolbar-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.meter-readout { font: 400 13px/1.3 var(--mono); color: var(--ink-2); }
.meter-readout strong { font-weight: 500; }
.meter-readout.over strong { color: var(--pencil); }
.meter-readout.fits strong { color: var(--spruce); }
.page-stage {
  flex: 1; overflow: auto; position: relative; padding: 30px 28px 60px 72px;
  display: flex; justify-content: center; align-items: flex-start;
}
.page-frame { position: relative; }
.sheet-stack { display: flex; flex-direction: column; gap: 22px; position: relative; }
.page-sheet { position: relative; background: #fff; box-shadow: 0 1px 0 var(--hair), 0 20px 40px -24px rgba(27, 26, 23, 0.55); }
.page-sheet canvas, .page-sheet iframe { display: block; }
.page-sheet iframe { border: 0; }
.page-sheet.overflow { opacity: 0.92; }
.page-sheet.overflow::after {  /* the part that runs over, in red pencil */
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: repeating-linear-gradient(135deg, rgba(200, 65, 29, 0.05) 0 5px, transparent 5px 16px);
  border: 2px solid var(--pencil);
}
.overflow-label {
  position: absolute; top: -12px; left: 16px; z-index: 2; background: var(--pencil); color: #fff;
  font: 500 11px/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; padding: 5px 8px;
}
.page-sheet.flash { animation: flash 1.2s ease; }
@keyframes flash { 0% { box-shadow: 0 0 0 6px var(--marker), 0 20px 40px -24px rgba(27, 26, 23, 0.55); }
                   100% { box-shadow: 0 1px 0 var(--hair), 0 20px 40px -24px rgba(27, 26, 23, 0.55); } }
.sheet-placeholder {
  width: min(560px, 60vw); aspect-ratio: 8.5 / 11; display: grid; place-items: center; text-align: center; padding: 40px;
  border: 1.5px dashed var(--hair-strong); color: var(--muted); font: italic 400 17px/1.4 var(--display);
}
.ruler {  /* the page's text area; quarter-page ticks; fills with the content height */
  position: absolute; left: -38px; top: var(--ruler-top, 0px); width: 14px; height: var(--page-h, 0px);
  border: 1px solid var(--ink); background:
    repeating-linear-gradient(to bottom, transparent 0 calc(var(--page-h, 400px) / 4 - 1px), var(--ink) 0 calc(var(--page-h, 400px) / 4));
}
.ruler::before { content: "top"; position: absolute; top: -16px; left: -2px; font: 500 10px/1 var(--mono); color: var(--muted); }
.ruler::after {
  content: "1 page"; position: absolute; bottom: -1px; left: 18px; font: 500 10px/1 var(--mono); white-space: nowrap;
  border-top: 1px solid var(--ink); padding-top: 3px; width: 38px;
}
.ruler.over::after { color: var(--pencil); border-color: var(--pencil); }
.ruler-fill {
  position: absolute; left: 2px; right: 2px; top: 0; height: var(--fill-h, 0px); background: var(--ink);
  transition: height 0.6s cubic-bezier(.2, .8, .2, 1);
}
.ruler.over .ruler-fill { background: linear-gradient(to bottom, var(--ink) var(--page-share, 100%), var(--pencil) 0); }
.ruler.fits .ruler-fill { background: var(--spruce); }
.stamp {
  position: absolute; top: 26px; right: -22px; z-index: 3; pointer-events: none;
  font: 700 26px/0.95 var(--display); text-transform: uppercase; letter-spacing: 0.04em; text-align: center;
  color: var(--spruce); border: 4px double var(--spruce); border-radius: 6px; padding: 10px 16px 8px;
  background: rgba(213, 233, 222, 0.55); transform: rotate(-9deg); mix-blend-mode: multiply;
  animation: stamp-in 0.45s cubic-bezier(.2, 1.4, .4, 1) both;
}
.stamp span { font: 500 12px/1 var(--mono); letter-spacing: 0.16em; }
@keyframes stamp-in { from { opacity: 0; transform: rotate(-9deg) scale(1.6); } to { opacity: 0.92; transform: rotate(-9deg) scale(1); } }

/* inspector: index cards */
.inspector { background: var(--paper-2); border-left: 1px solid var(--hair); overflow-y: auto; padding: 14px 14px 30px; gap: 14px; }
.card { background: var(--paper); border: 1px solid var(--hair); border-radius: 3px; padding: 14px 14px 10px; }
.card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; margin-bottom: 10px; }
.count, .hint { font: 400 11px/1 var(--mono); color: var(--muted); }
.ledger, .section-list, .versions, .cuts { list-style: none; margin: 0; padding: 0; }
.ledger li { display: grid; grid-template-columns: 16px minmax(0, 1fr); gap: 6px; padding: 5px 0; border-top: 1px solid var(--hair); font-size: 14px; }
.ledger li:first-child { border-top: 0; }
.ledger .glyph { font: 400 13px/1.4 var(--mono); color: var(--hair-strong); }
.ledger .name { color: var(--ink-2); }
.ledger .value { display: block; color: var(--muted); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ledger li.filled .glyph { color: var(--spruce); }
.ledger li.needed .glyph, .ledger li.needed .tag { color: var(--pencil); }
.ledger .tag { font: 500 10px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; margin-left: 6px; color: var(--muted); }
.ledger li.fresh { animation: fresh 1.6s ease; }
@keyframes fresh { 0% { background: var(--marker); } 100% { background: transparent; } }
.section-list li {
  display: flex; align-items: center; gap: 6px; padding: 6px 4px; border-top: 1px solid var(--hair);
  font-size: 14px; cursor: pointer; border-radius: 2px;
}
.section-list li:first-child { border-top: 0; }
.section-list li:hover { background: var(--paper-2); }
.section-list li.selected { background: var(--marker); }
.section-list li.hidden-section .s-name { color: var(--muted); text-decoration: line-through; text-decoration-color: var(--hair-strong); }
.section-list li.changed { animation: fresh 2s ease; }
.s-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.s-type { font: 400 10px/1 var(--mono); color: var(--muted); }
.s-lock { font-size: 11px; color: var(--muted); }
.row-btn { border: 1px solid transparent; background: none; border-radius: 2px; cursor: pointer; padding: 2px 5px; font: 400 12px/1 var(--mono); color: var(--ink-2); }
.row-btn:hover { border-color: var(--hair-strong); background: var(--paper); }
.versions li { padding: 7px 0 7px 10px; border-left: 2px solid var(--hair); font-size: 13px; margin-left: 2px; }
.versions li.current { border-left-color: var(--ink); background: linear-gradient(to right, var(--paper-2), transparent); }
.versions .v-head { font: 500 11px/1.2 var(--mono); letter-spacing: 0.04em; }
.versions .v-source { text-transform: uppercase; color: var(--muted); }
.versions .v-source.fit { color: var(--spruce); }
.versions .v-source.edit { color: var(--pencil); }
.versions .v-text { color: var(--ink-2); display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cuts li { font-size: 13px; padding: 6px 0; border-top: 1px solid var(--hair); }
.cuts li:first-child { border-top: 0; }
.cuts .c-action { font: 500 10px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--pencil); margin-right: 6px; }

.toast {
  position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%); z-index: 10;
  background: var(--ink); color: var(--paper); padding: 10px 16px; border-radius: 3px; font-size: 14px;
  box-shadow: 0 12px 30px -12px rgba(0, 0, 0, 0.5);
}

/* narrower screens: stack the columns */
@media (max-width: 1100px) {
  .desk { display: block; height: auto; }
  .log-column { border-right: 0; border-bottom: 1px solid var(--hair); }
  .log { max-height: 50vh; }
  .page-stage { padding: 24px 16px 40px 56px; }
  .inspector { border-left: 0; }
}
@media (max-width: 640px) {
  .masthead { gap: 12px; padding: 0 16px; }
  .model-tag { display: none; }
  .home { padding: 36px 16px; }
  .sheet-card { width: min(236px, 100%); }
}