@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Manrope:wght@400;500;600;700&family=Newsreader:opsz,wght@6..72,500;6..72,600&display=swap');

:root {
  --ink: #111317;
  --muted: #636973;
  --line: #d8dbe0;
  --line-dark: #2c3037;
  --paper: #f7f7f4;
  --white: #ffffff;
  --panel: #eceeea;
  --blue: #1c55e5;
  --blue-dark: #153fac;
  --amber: #f4b942;
  --danger: #b9382d;
  --green: #16734d;
  --sans: 'Manrope', system-ui, sans-serif;
  --serif: 'Newsreader', Georgia, serif;
  --mono: 'DM Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }

html { color-scheme: light; scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
}

button, input, textarea, select { font: inherit; }
button { cursor: pointer; }

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--blue) 35%, transparent);
  outline-offset: 2px;
}

.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;
}

.app-shell {
  display: grid;
  grid-template-columns: 370px minmax(0, 1fr);
  grid-template-rows: 72px calc(100vh - 72px);
  min-height: 100vh;
}

.topbar {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 370px minmax(0, 1fr) auto;
  align-items: center;
  border-bottom: 1px solid var(--line-dark);
  background: var(--ink);
  color: var(--white);
  min-width: 0;
}

.brand {
  align-self: stretch;
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 0 26px;
  border-right: 1px solid var(--line-dark);
  color: inherit;
  text-decoration: none;
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .14em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  background: var(--amber);
  color: var(--ink);
  font-weight: 500;
  letter-spacing: -.08em;
}

.topbar-note {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 28px;
  color: #9da2ab;
  font-family: var(--serif);
  font-size: 1.05rem;
  font-style: italic;
}

.lab-return {
  color: var(--amber);
  font-family: var(--mono);
  font-size: .7rem;
  font-style: normal;
  letter-spacing: .04em;
  text-decoration: none;
}
.lab-return:hover { color: var(--white); }

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-right: 22px;
}

.text-button,
.primary-button,
.outline-button,
.icon-button {
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: 0;
  padding: 9px 15px;
  font-weight: 700;
  font-size: .85rem;
  transition: background-color .16s ease, border-color .16s ease, color .16s ease, transform .16s ease;
}

.text-button { background: transparent; color: inherit; }
.text-button:hover { color: var(--amber); }
.primary-button { background: var(--blue); color: var(--white); }
.primary-button:hover { background: var(--blue-dark); }
.primary-button:active, .outline-button:active { transform: translateY(1px); }
.outline-button { background: transparent; border-color: var(--line); color: var(--ink); }
.outline-button:hover { border-color: var(--ink); background: var(--white); }
.icon-button { min-width: 42px; padding: 8px; background: transparent; border-color: var(--line); color: var(--muted); }
.icon-button:hover { color: var(--ink); border-color: var(--ink); }

.library {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-right: 1px solid var(--line);
  background: var(--panel);
}

.library-head { padding: 22px 20px 16px; border-bottom: 1px solid var(--line); }

.search-wrap { position: relative; display: block; }
.search-wrap input {
  width: 100%;
  height: 45px;
  padding: 0 50px 0 14px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--white);
  color: var(--ink);
}
.search-wrap input::placeholder { color: #7d828b; }
.search-wrap kbd {
  position: absolute;
  right: 10px;
  top: 10px;
  min-width: 25px;
  padding: 2px 6px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--muted);
  font-family: var(--mono);
  font-size: .73rem;
  text-align: center;
}

.filters { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 13px; }
.filter-button {
  min-height: 32px;
  padding: 5px 10px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .73rem;
}
.filter-button:hover { color: var(--ink); }
.filter-button.active { border-color: var(--ink); background: var(--ink); color: var(--white); }

.thesis-list { flex: 1; overflow-y: auto; overscroll-behavior: contain; }
.thesis-card {
  width: 100%;
  display: grid;
  grid-template-columns: 5px minmax(0, 1fr);
  gap: 17px;
  padding: 22px 20px 22px 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  text-align: left;
}
.thesis-card::before { content: ''; background: transparent; }
.thesis-card:hover { background: color-mix(in srgb, var(--white) 55%, transparent); }
.thesis-card.active { background: var(--white); }
.thesis-card.active::before { background: var(--blue); }
.card-meta { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 9px; }
.eyebrow, .mini-score { font-family: var(--mono); font-size: .7rem; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); }
.mini-score { color: var(--blue); }
.thesis-card h3 { margin: 0; font-family: var(--serif); font-size: 1.2rem; line-height: 1.2; font-weight: 600; }
.card-foot { display: flex; align-items: center; gap: 10px; margin-top: 13px; color: var(--muted); font-size: .76rem; }
.card-foot span + span::before { content: '·'; margin-right: 10px; }

.library-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: .68rem;
}

.workspace { min-width: 0; overflow-y: auto; background: var(--paper); }
.workspace-inner { width: min(100%, 1180px); margin: 0 auto; padding: 42px 5vw 72px; }

.thesis-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 190px;
  gap: 48px;
  align-items: end;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--ink);
}

.section-label { margin-bottom: 18px; color: var(--blue); font-family: var(--mono); font-size: .72rem; letter-spacing: .11em; text-transform: uppercase; }
.section-label span { color: var(--muted); }
.thesis-title-input {
  width: 100%;
  resize: none;
  overflow: hidden;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(2.2rem, 5vw, 4.8rem);
  font-weight: 600;
  line-height: .98;
  letter-spacing: -.035em;
}
.thesis-title-input:focus { outline: 0; }
.thesis-title-input::selection { background: var(--amber); color: var(--ink); }
.thesis-why {
  width: min(760px, 100%);
  margin-top: 24px;
  resize: vertical;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

.confidence-block { border-left: 1px solid var(--line); padding-left: 24px; }
.confidence-number { display: flex; align-items: baseline; gap: 4px; font-family: var(--serif); font-size: 4.2rem; font-weight: 600; line-height: 1; }
.confidence-number small { font-family: var(--mono); font-size: .85rem; color: var(--muted); }
.confidence-label { margin-top: 8px; color: var(--muted); font-family: var(--mono); font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; }
.confidence-block input[type='range'] { width: 100%; margin: 18px 0 0; accent-color: var(--blue); }

.meta-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr) auto;
  border-bottom: 1px solid var(--line);
}
.meta-field { padding: 18px 24px 18px 0; }
.meta-field + .meta-field { padding-left: 24px; border-left: 1px solid var(--line); }
.meta-field label { display: block; margin-bottom: 4px; color: var(--muted); font-family: var(--mono); font-size: .68rem; text-transform: uppercase; letter-spacing: .08em; }
.meta-field input, .meta-field select {
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-weight: 700;
}
.meta-field input:focus, .meta-field select:focus { outline: 0; box-shadow: 0 2px 0 var(--blue); }
.delete-wrap { display: flex; align-items: center; padding-left: 24px; border-left: 1px solid var(--line); }
.delete-button { color: var(--danger); }

.thesis-grid { display: grid; grid-template-columns: 1fr 1fr; border-bottom: 1px solid var(--line); }
.evidence-column { min-width: 0; padding: 34px 36px 36px 0; }
.evidence-column + .evidence-column { padding-left: 36px; padding-right: 0; border-left: 1px solid var(--line); }
.column-head { display: flex; align-items: start; justify-content: space-between; gap: 16px; margin-bottom: 22px; }
.column-head h2 { margin: 0; font-family: var(--serif); font-size: 1.55rem; }
.column-head p { margin: 4px 0 0; color: var(--muted); font-size: .8rem; }
.add-small {
  flex: 0 0 auto;
  min-width: 36px;
  min-height: 36px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font-size: 1.25rem;
  line-height: 1;
}
.add-small:hover { border-color: var(--ink); background: var(--white); }

.evidence-list { list-style: none; padding: 0; margin: 0; }
.evidence-item { display: grid; grid-template-columns: 26px minmax(0, 1fr) auto; gap: 12px; align-items: start; padding: 14px 0; border-top: 1px solid var(--line); }
.evidence-index { padding-top: 2px; color: var(--muted); font-family: var(--mono); font-size: .68rem; }
.evidence-text { width: 100%; min-height: 48px; resize: vertical; padding: 0; border: 0; background: transparent; color: var(--ink); line-height: 1.55; }
.evidence-text:focus { outline: 0; box-shadow: 0 2px 0 var(--blue); }
.remove-item { width: 30px; height: 30px; border: 0; background: transparent; color: #9297a0; font-size: 1rem; }
.remove-item:hover { color: var(--danger); }
.blank-row { padding: 20px 0; border-top: 1px solid var(--line); color: var(--muted); font-family: var(--serif); font-style: italic; }

.signals-section { padding: 34px 0 0; }
.signals-head { display: flex; justify-content: space-between; align-items: start; gap: 20px; margin-bottom: 22px; }
.signals-head h2 { margin: 0; font-family: var(--serif); font-size: 1.65rem; }
.signals-head p { margin: 5px 0 0; color: var(--muted); font-size: .85rem; }
.signal-list { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--ink); }
.signal-card { min-width: 0; padding: 22px 24px 20px 0; }
.signal-card + .signal-card { padding-left: 24px; border-left: 1px solid var(--line); }
.signal-top { display: flex; justify-content: space-between; gap: 8px; margin-bottom: 14px; }
.signal-status {
  min-height: 29px;
  padding: 4px 8px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .66rem;
  text-transform: uppercase;
}
.signal-status[data-state='watching'] { border-color: var(--blue); color: var(--blue); }
.signal-status[data-state='met'] { border-color: var(--green); color: var(--green); }
.signal-text { width: 100%; min-height: 72px; resize: vertical; padding: 0; border: 0; background: transparent; color: var(--ink); line-height: 1.45; }
.signal-text:focus { outline: 0; box-shadow: 0 2px 0 var(--blue); }
.signal-foot { margin-top: 12px; color: var(--muted); font-family: var(--mono); font-size: .65rem; text-transform: uppercase; }

.saved-indicator {
  position: fixed;
  right: 24px;
  bottom: 22px;
  z-index: 5;
  padding: 8px 11px;
  background: var(--ink);
  color: var(--white);
  font-family: var(--mono);
  font-size: .68rem;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .2s ease, transform .2s ease;
  pointer-events: none;
}
.saved-indicator.show { opacity: 1; transform: translateY(0); }

.empty-state { display: grid; place-items: center; align-content: center; min-height: calc(100vh - 72px); padding: 40px; text-align: center; }
.empty-mark { margin-bottom: 20px; color: var(--blue); font-family: var(--serif); font-size: 5rem; line-height: 1; }
.empty-state h1 { margin: 0; font-family: var(--serif); font-size: 2.3rem; }
.empty-state p { margin: 9px 0 24px; color: var(--muted); }

.dialog {
  width: min(620px, calc(100% - 30px));
  padding: 0;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 16px 16px 0 rgba(17, 19, 23, .2);
}
.dialog::backdrop { background: rgba(17, 19, 23, .68); }
.dialog form { padding: 34px; }
.dialog-kicker { color: var(--blue); font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; }
.dialog h2 { margin: 12px 0 28px; font-family: var(--serif); font-size: 2.3rem; line-height: 1.05; }
.dialog label { display: block; margin-top: 18px; color: var(--muted); font-family: var(--mono); font-size: .7rem; letter-spacing: .06em; text-transform: uppercase; }
.dialog input, .dialog textarea, .dialog select { width: 100%; margin-top: 7px; padding: 12px; border: 1px solid var(--line); border-radius: 0; background: var(--white); color: var(--ink); font-family: var(--sans); font-size: .95rem; text-transform: none; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 28px; }

@media (max-width: 960px) {
  .app-shell { grid-template-columns: 300px minmax(0, 1fr); }
  .topbar { grid-template-columns: 300px minmax(0, 1fr) auto; }
  .thesis-header { grid-template-columns: 1fr 150px; gap: 26px; }
  .workspace-inner { padding-inline: 34px; }
  .thesis-grid { grid-template-columns: 1fr; }
  .evidence-column { padding-right: 0; }
  .evidence-column + .evidence-column { padding: 34px 0 36px; border-left: 0; border-top: 1px solid var(--line); }
  .signal-list { grid-template-columns: 1fr; }
  .signal-card { padding-right: 0; }
  .signal-card + .signal-card { padding: 22px 0; border-left: 0; border-top: 1px solid var(--line); }
}

@media (max-width: 720px) {
  .app-shell { display: block; }
  .topbar { position: sticky; top: 0; z-index: 8; display: flex; height: 64px; justify-content: space-between; }
  .brand { padding: 0 14px; border-right: 0; }
  .brand-mark { width: 32px; height: 32px; }
  .brand > span:last-child, .topbar-note, .topbar-actions .text-button { display: none; }
  .topbar-actions { padding-right: 12px; }
  .library { position: static; max-height: none; border-right: 0; }
  .library-head { padding: 15px 15px 11px; }
  .filters { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 2px; }
  .thesis-list { display: flex; overflow-x: auto; overflow-y: hidden; border-bottom: 1px solid var(--line); scroll-snap-type: x proximity; }
  .thesis-card { flex: 0 0 82vw; max-width: 340px; min-height: 150px; border-right: 1px solid var(--line); border-bottom: 0; scroll-snap-align: start; }
  .library-footer { display: none; }
  .workspace { overflow: visible; }
  .workspace-inner { padding: 30px 20px 60px; }
  .thesis-header { display: block; }
  .thesis-title-input { font-size: clamp(2.6rem, 12vw, 4rem); }
  .confidence-block { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 8px 16px; margin-top: 30px; padding: 20px 0 0; border-left: 0; border-top: 1px solid var(--line); }
  .confidence-number { grid-row: 1 / 3; font-size: 3.5rem; }
  .confidence-label { margin: 0; }
  .confidence-block input[type='range'] { margin: 0; }
  .meta-strip { grid-template-columns: 1fr 1fr; }
  .meta-field { padding: 16px 12px 16px 0; }
  .meta-field + .meta-field { padding-left: 12px; }
  .meta-field:nth-child(3) { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .delete-wrap { border-top: 1px solid var(--line); }
  .evidence-column { padding-top: 28px; }
  .signals-head { align-items: center; }
  .saved-indicator { right: 14px; bottom: 14px; }
  .dialog form { padding: 26px 22px; }
  .dialog h2 { font-size: 1.9rem; }
}

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