/* Neutron Deck Studio — "Engineered Blueprint" app chrome.
   Echoes the slide house style: pale cool paper, ink linework, teal + amber,
   serif display, monospace labels, faint drafting grid. */

:root {
  --paper: #f0f1f3;
  --paper-alt: #ffffff;
  --ink: #14181f;
  --slate: #2a2f38;
  --teal: #0f766e;
  --teal-light: #3f9d92;
  --amber: #b0751a;
  --hair: rgba(20, 24, 31, 0.12);
  --hair-soft: rgba(20, 24, 31, 0.06);
  --shadow: 0 1px 2px rgba(20, 24, 31, 0.06), 0 8px 24px rgba(20, 24, 31, 0.08);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Roboto Mono", ui-monospace, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--hair-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--hair-soft) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}
#root { height: 100vh; height: 100dvh; }

button { font-family: inherit; cursor: pointer; }
.mono { font-family: var(--mono); }

/* ------------------------------------------------------------------ Login */
.login-wrap {
  height: 100dvh; display: grid; place-items: center; padding: 24px;
}
.login-card {
  width: 100%; max-width: 380px; background: var(--paper-alt);
  border: 1px solid var(--hair); border-radius: 14px; padding: 34px 30px;
  box-shadow: var(--shadow);
}
.login-mark { font-family: var(--serif); font-size: 27px; letter-spacing: -0.01em; margin: 0 0 2px; }
.login-sub { font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--teal); margin: 0 0 24px; }
.login-card input {
  width: 100%; padding: 12px 14px; border: 1px solid var(--hair);
  border-radius: 9px; font-size: 16px; font-family: var(--sans); background: var(--paper);
}
.login-card input:focus { outline: 2px solid var(--teal-light); border-color: transparent; }
.login-card button {
  width: 100%; margin-top: 14px; padding: 12px; border: none; border-radius: 9px;
  background: var(--ink); color: var(--paper); font-size: 15px; font-weight: 600;
}
.login-card button:active { transform: translateY(1px); }
.login-err { color: #a12b1e; font-size: 13px; margin-top: 12px; min-height: 16px; }

/* ------------------------------------------------------------------ Shell */
.app { display: flex; flex-direction: column; height: 100dvh; }
.topbar {
  display: flex; align-items: baseline; gap: 14px; padding: 12px 18px;
  border-bottom: 1px solid var(--hair); background: rgba(240, 241, 243, 0.9);
  backdrop-filter: blur(8px); flex: none;
}
.topbar .wordmark { font-family: var(--serif); font-size: 20px; letter-spacing: -0.01em; }
.topbar .tag { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--teal); white-space: nowrap; }
.topbar .spacer { flex: 1; }
.topbar .ghost {
  background: transparent; border: 1px solid var(--hair); border-radius: 7px;
  padding: 6px 11px; font-size: 12.5px; color: var(--slate);
}
.topbar .ghost:hover { border-color: var(--teal-light); color: var(--teal); }

.cols { display: flex; flex: 1; min-height: 0; }

/* -------------------------------------------------------------- Left rail */
.rail {
  width: 340px; flex: none; border-right: 1px solid var(--hair);
  overflow-y: auto; background: rgba(255, 255, 255, 0.35); -webkit-overflow-scrolling: touch;
}
.rail-head {
  display: flex; align-items: center; gap: 8px; padding: 12px 14px 6px;
  position: sticky; top: 0; background: var(--paper); z-index: 2; border-bottom: 1px solid var(--hair-soft);
}
.rail-head .mono { font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--slate); }
.rail-head .spacer { flex: 1; }
.chip {
  border: 1px solid var(--hair); background: var(--paper-alt); border-radius: 7px;
  padding: 5px 9px; font-size: 12px; color: var(--slate);
}
.chip:hover { border-color: var(--teal-light); color: var(--teal); }
.chip.primary { background: var(--teal); color: #fff; border-color: var(--teal); }
.chip.primary:hover { background: var(--teal-light); }

.group { border-bottom: 1px solid var(--hair-soft); }
.group-head {
  display: flex; align-items: center; gap: 8px; padding: 10px 12px;
  user-select: none; cursor: pointer;
}
.group-head.dragover { background: rgba(63, 157, 146, 0.12); }
.group-caret { width: 14px; color: var(--slate); font-size: 11px; transition: transform 0.15s; }
.group-caret.open { transform: rotate(90deg); }
.group-name { font-family: var(--serif); font-size: 15.5px; flex: 1; }
.group-count { font-family: var(--mono); font-size: 10.5px; color: var(--teal); }
.group-menu { opacity: 0; font-size: 12px; color: var(--slate); border: none; background: none; padding: 2px 4px; }
.group-head:hover .group-menu { opacity: 1; }

.thumbs { padding: 6px 10px 12px; display: flex; flex-direction: column; gap: 10px; }
.thumb {
  display: flex; flex-direction: column; gap: 6px; padding: 6px; border-radius: 10px;
  cursor: pointer; border: 1px solid transparent;
}
.thumb:hover { background: rgba(20, 24, 31, 0.035); }
.thumb.selected { background: rgba(15, 118, 110, 0.09); border-color: rgba(15, 118, 110, 0.28); }
.thumb.dragging { opacity: 0.4; }
.thumb-imgwrap { position: relative; width: 100%; }
.thumb-img {
  width: 100%; aspect-ratio: 16 / 9; display: block; border-radius: 6px; object-fit: cover;
  border: 1px solid var(--hair); background: var(--paper-alt);
}
.thumb-foot { display: flex; align-items: baseline; gap: 8px; padding: 0 2px; }
.thumb-title { font-size: 13.5px; color: var(--ink); flex: 1; min-width: 0;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.thumb-sub { font-family: var(--mono); font-size: 10px; color: var(--teal); flex: none; }
.thumb-del {
  position: absolute; top: 5px; right: 5px; opacity: 0; border: none; line-height: 1;
  background: rgba(240, 241, 243, 0.85); color: #a12b1e; font-size: 15px; padding: 3px 8px;
  border-radius: 6px; backdrop-filter: blur(2px);
}
.thumb:hover .thumb-del { opacity: 0.9; }
.thumb-del:hover { opacity: 1; }
.group-empty { font-family: var(--mono); font-size: 11px; color: var(--slate); opacity: 0.6; padding: 8px 12px; }

/* -------------------------------------------------------------- Stage */
.stage { flex: 1; min-width: 0; display: flex; flex-direction: column; overflow: hidden; }
.stage-empty {
  flex: 1; display: grid; place-items: center; color: var(--slate); text-align: center; padding: 24px;
}
.stage-empty .serif { font-family: var(--serif); font-size: 22px; margin-bottom: 6px; }
.stage-empty .mono { font-size: 12px; opacity: 0.7; }

.stage-head { display: flex; align-items: baseline; gap: 12px; padding: 14px 20px 8px; flex: none; }
.stage-title { font-family: var(--serif); font-size: 21px; }
.stage-head .mono { font-size: 11px; color: var(--teal); }
.stage-head .spacer { flex: 1; }
.used-in { font-family: var(--mono); font-size: 10.5px; color: var(--slate); }

/* 16:9 slides read better with the version rail as a strip UNDERNEATH the slide. */
.stage-body { flex: 1; display: flex; flex-direction: column; min-height: 0; gap: 12px; padding: 4px 20px 18px; }
.slide-view {
  flex: 1; min-width: 0; min-height: 0; width: 100%; display: grid; place-items: center;
  background: var(--paper-alt); border: 1px solid var(--hair); border-radius: 12px;
  box-shadow: var(--shadow); overflow: hidden; padding: 10px;
}
.slide-view img { max-width: 100%; max-height: 100%; object-fit: contain; border-radius: 4px; }

.versions { flex: none; width: 100%; }
.versions h4 { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--slate); margin: 0 0 8px; }
.ver-list { display: flex; flex-direction: row; gap: 8px; overflow-x: auto; overflow-y: hidden; padding-bottom: 4px; }
.ver {
  display: flex; align-items: center; gap: 8px; padding: 6px; border: 1px solid var(--hair);
  border-radius: 8px; cursor: pointer; background: var(--paper-alt); flex: none; min-width: 150px;
}
.ver.current { border-color: var(--teal); box-shadow: 0 0 0 1px var(--teal) inset; }
.ver img { width: 60px; height: 34px; object-fit: cover; border-radius: 3px; border: 1px solid var(--hair); }
.ver-meta { flex: 1; min-width: 0; }
.ver-num { font-family: var(--mono); font-size: 11px; color: var(--ink); }
.ver-date { font-family: var(--mono); font-size: 9px; color: var(--slate); opacity: 0.7; }
.ver-del { opacity: 0.5; border: none; background: none; color: #a12b1e; font-size: 13px; padding: 2px; }
.ver-del:hover { opacity: 1; }
.badge-current { font-family: var(--mono); font-size: 8.5px; color: var(--teal); }

.newslide-note {
  font-family: var(--mono); font-size: 10px; color: var(--slate); opacity: 0.7;
  padding: 6px 10px; border: 1px dashed var(--hair); border-radius: 7px; margin-top: 8px;
  text-align: center; white-space: nowrap; display: inline-block;
}

/* -------------------------------------------------------------- Mobile */
.mobile-tabs { display: none; }
@media (max-width: 760px) {
  .cols { flex-direction: column; }
  .rail { width: 100%; border-right: none; border-bottom: 1px solid var(--hair);
    max-height: 45%; }
  .rail.hidden-m { display: none; }
  .stage.hidden-m { display: none; }
  .stage-body { flex-direction: column; padding: 4px 12px 12px; }
  .versions { width: 100%; }
  .ver-list { flex-direction: row; overflow-x: auto; }
  .ver { min-width: 130px; }
  .mobile-tabs { display: flex; gap: 8px; padding: 8px 14px; border-bottom: 1px solid var(--hair); flex: none; }
  .mobile-tabs button {
    flex: 1; padding: 8px; border: 1px solid var(--hair); background: var(--paper-alt);
    border-radius: 8px; font-size: 13px; color: var(--slate);
  }
  .mobile-tabs button.active { background: var(--teal); color: #fff; border-color: var(--teal); }

  /* Touch devices don't hover — keep delete + group controls always tappable. */
  .thumb-del { opacity: 0.65; font-size: 20px; padding: 6px 10px; }
  .group-menu { opacity: 1; font-size: 15px; padding: 4px 7px; }

  /* Size the slide view to its 16:9 image instead of stretching down the page. */
  .slide-view { flex: none; width: 100%; aspect-ratio: 16 / 9; }
}

/* ============================================================ Phase 2/3 UI */

/* ---- topbar: mode nav + gen badge ---- */
.mode-nav { display: flex; gap: 4px; margin-left: 8px; }
.mode-nav button {
  border: 1px solid transparent; background: transparent; border-radius: 7px;
  padding: 5px 12px; font-size: 13px; color: var(--slate); font-family: var(--sans);
}
.mode-nav button:hover { color: var(--teal); }
.mode-nav button.active { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.gen-badge { font-size: 10.5px; color: var(--teal); letter-spacing: 0.04em; align-self: center; }

/* ---- chips: danger / tiny / pinned ---- */
.chip.danger { color: #a12b1e; }
.chip.danger:hover { border-color: #a12b1e; color: #a12b1e; }
.chip.tiny { padding: 3px 7px; font-size: 10.5px; border-radius: 6px; }
.chip.tiny.pinned { border-color: var(--amber); color: var(--amber); background: rgba(176, 117, 26, 0.08); }
.chip[disabled] { opacity: 0.45; cursor: default; }
a.chip { text-decoration: none; display: inline-flex; align-items: center; }

/* ---- stage: slide view + version controls ---- */
.stage-head { flex-wrap: wrap; }
.ver-controls { display: flex; align-items: center; gap: 6px; }
.ver-select {
  border: 1px solid var(--hair); background: var(--paper-alt); border-radius: 7px;
  padding: 5px 8px; font-size: 11.5px; color: var(--slate); max-width: 210px;
}
.ver-select:focus { outline: 2px solid var(--teal-light); border-color: transparent; }
.deck-desc { font-family: var(--sans); font-size: 12.5px; color: var(--slate); opacity: 0.8; }

.slide-view { position: relative; margin: 4px 20px 6px; }
.slide-gen-overlay {
  position: absolute; inset: 0; z-index: 3; display: flex; flex-direction: column; gap: 12px;
  align-items: center; justify-content: center; background: rgba(240, 241, 243, 0.78);
  backdrop-filter: blur(2px); color: var(--slate); font-size: 12px;
}

/* ---- speaker notes ---- */
.notes-pane {
  flex: none; margin: 0 20px 16px; border: 1px solid var(--hair); border-radius: 12px;
  background: var(--paper-alt); display: flex; flex-direction: column; min-height: 150px; max-height: 34%;
}
.notes-head {
  display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-bottom: 1px solid var(--hair-soft);
}
.notes-head .mono { font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--slate); }
.notes-head .spacer { flex: 1; }
.notes-status { font-family: var(--mono); font-size: 10px; color: var(--teal); opacity: 0.8; }
.notes-area {
  flex: 1; width: 100%; resize: none; border: none; background: transparent; padding: 12px 14px;
  font-family: var(--sans); font-size: 14px; line-height: 1.55; color: var(--ink);
}
.notes-area:focus { outline: none; }

/* ---- spinner ---- */
.spin {
  display: inline-block; width: 13px; height: 13px; border: 2px solid var(--hair);
  border-top-color: var(--teal); border-radius: 50%; animation: spin 0.7s linear infinite;
  vertical-align: -2px;
}
.spin.big { width: 26px; height: 26px; border-width: 3px; }
@keyframes spin { to { transform: rotate(360deg); } }
.thumb-gen {
  position: absolute; inset: 0; display: flex; flex-direction: column; gap: 6px;
  align-items: center; justify-content: center; background: rgba(240, 241, 243, 0.72);
  border-radius: 6px; font-size: 10px; color: var(--slate);
}

/* ---- modals / panels ---- */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 50; background: rgba(20, 24, 31, 0.42);
  backdrop-filter: blur(3px); display: grid; place-items: center; padding: 20px;
}
.modal {
  width: 100%; max-width: 440px; background: var(--paper-alt); border: 1px solid var(--hair);
  border-radius: 14px; box-shadow: var(--shadow); padding: 22px 22px 18px; max-height: 90dvh;
  display: flex; flex-direction: column;
}
.modal.wide { max-width: 620px; }
.modal.tall { height: 82dvh; }
.modal h3 { margin: 0 0 4px; font-size: 20px; }
.modal-sub { font-size: 12.5px; color: var(--slate); margin: 0 0 14px; line-height: 1.5; }
.blob-box {
  width: 100%; min-height: 180px; resize: vertical; border: 1px solid var(--hair); border-radius: 9px;
  padding: 12px 13px; font-family: var(--mono); font-size: 12.5px; line-height: 1.5; background: var(--paper);
  color: var(--ink);
}
.blob-box.small { min-height: 96px; }
.blob-box:focus { outline: 2px solid var(--teal-light); border-color: transparent; }
.modal-row { display: flex; gap: 8px; margin-top: 10px; align-items: center; }
.modal-input {
  flex: 1; padding: 9px 11px; border: 1px solid var(--hair); border-radius: 8px; font-size: 13px;
  font-family: var(--sans); background: var(--paper); color: var(--ink);
}
.modal-input:focus { outline: 2px solid var(--teal-light); border-color: transparent; }
.modal-actions { display: flex; align-items: center; gap: 8px; margin-top: 16px; }
.modal-actions .spacer { flex: 1; }
.modal-hint { font-size: 10px; color: var(--slate); opacity: 0.7; }

/* ---- decks: list + filmstrip ---- */
.deck-row {
  display: flex; align-items: center; gap: 10px; padding: 11px 14px; cursor: pointer;
  border-bottom: 1px solid var(--hair-soft);
}
.deck-row:hover { background: rgba(20, 24, 31, 0.035); }
.deck-row.selected { background: rgba(15, 118, 110, 0.09); }
.deck-name { font-family: var(--serif); font-size: 15px; flex: 1; }
.deck-count { font-size: 10.5px; color: var(--teal); }

.filmstrip {
  flex: 1; overflow-y: auto; display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; padding: 8px 20px 22px; align-content: start;
}
.group-empty.big { grid-column: 1 / -1; font-size: 13px; opacity: 0.7; padding: 30px; text-align: center; }
.film {
  border: 1px solid var(--hair); border-radius: 10px; background: var(--paper-alt); overflow: hidden;
  display: flex; flex-direction: column; position: relative;
}
.film.dragging { opacity: 0.4; }
.film-num {
  position: absolute; top: 6px; left: 6px; z-index: 2; background: rgba(20, 24, 31, 0.82); color: var(--paper);
  font-size: 10.5px; padding: 2px 7px; border-radius: 5px;
}
.film-img { aspect-ratio: 16 / 9; background: var(--paper); border-bottom: 1px solid var(--hair-soft); }
.film-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.film-empty { display: grid; place-items: center; height: 100%; color: var(--slate); opacity: 0.5; font-size: 10px; }
.film-foot { display: flex; align-items: baseline; gap: 8px; padding: 7px 9px 2px; }
.film-title { font-size: 12.5px; flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.film-ver { font-size: 9.5px; color: var(--teal); }
.film-actions { display: flex; gap: 6px; padding: 6px 9px 9px; }
.film-actions .chip { flex: none; }
.film.add {
  border-style: dashed; align-items: center; justify-content: center; min-height: 160px; cursor: pointer;
}
.film-addbtn { border: none; background: none; color: var(--teal); font-family: var(--mono); font-size: 12px; padding: 20px; }

/* ---- slide picker ---- */
.picker-scroll { flex: 1; overflow-y: auto; margin-top: 10px; }
.picker-group { margin-bottom: 16px; }
.picker-group-head { font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--slate); margin-bottom: 8px; }
.picker-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }
.picker-item { border: 1px solid var(--hair); border-radius: 8px; overflow: hidden; cursor: pointer; background: var(--paper); }
.picker-item:hover { border-color: var(--teal-light); }
.picker-item img, .picker-empty { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; display: block; background: var(--paper-alt); }
.picker-foot { display: flex; align-items: baseline; gap: 6px; padding: 5px 7px; }
.picker-title { font-size: 11px; flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.picker-foot .mono { font-size: 9.5px; color: var(--teal); }

@media (max-width: 760px) {
  .notes-pane { margin: 0 12px 12px; max-height: none; }
  .slide-view { margin: 4px 12px 6px; }
  .filmstrip { grid-template-columns: 1fr 1fr; gap: 10px; padding: 8px 12px 18px; }
  .modal.wide, .modal { max-width: 100%; }
  .ver-select { max-width: 150px; }
}