/* DESIGN.md — Apple-style tokens, dark-first, unified dropzone flow */

:root {
  --teal:   #4ec4a8;
  --blue:   #5a90d8;
  --green:  #5ab468;
  --amber:  #c89a38;
  --red:    #f07358;
  --purple: #9470d8;

  --bg:  #0c0e11;
  --bg2: #15181d;
  --bg3: #1d2128;
  --bg4: #262b33;

  --txt: #e8ebf0;
  --t2:  rgba(232, 235, 240, 0.62);
  --t3:  rgba(232, 235, 240, 0.38);

  --card-grad-a: rgba(255, 255, 255, 0.04);
  --card-grad-b: rgba(255, 255, 255, 0.01);
  --bd:       rgba(255, 255, 255, 0.08);
  --inset-hi: rgba(255, 255, 255, 0.08);
  --shadow-deep: rgba(0, 0, 0, 0.55);

  --glow-teal: rgba(78, 196, 168, 0.35);
  --glow-blue: rgba(90, 144, 216, 0.35);
  --glow-amber: rgba(200, 154, 56, 0.35);

  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(ellipse at top left, #16202b 0%, var(--bg) 60%);
  color: var(--txt);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
  font-size: 15px;
  line-height: 1.5;
  min-height: 100vh;
  font-variant-numeric: tabular-nums;
}

/* --- hero -------------------------------------------------------------- */
.hero {
  padding: 48px 36px 24px;
  text-align: center;
}
.hero-inner {
  max-width: 960px;
  margin: 0 auto;
}
.hero h1 {
  margin: 0 0 8px;
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.8px;
  background: linear-gradient(135deg, var(--teal) 0%, var(--blue) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .sub {
  margin: 0 0 8px;
  color: var(--t2);
  font-size: 15px;
  font-weight: 500;
}
.hero .rule-hint {
  margin: 0 0 18px;
  color: var(--t3);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.2px;
}
.hero .rule-hint b { color: var(--t2); font-weight: 700; }

/* --- library card ------------------------------------------------------ */
.library-card {
  max-width: 960px;
  margin: 0 auto;
  padding: 18px 22px;
  display: grid;
  gap: 14px;
  border-left: 3px solid var(--bd);
  transition: border-color 220ms;
}
.library-card.ok   { border-left-color: var(--green); }
.library-card.warn { border-left-color: var(--amber); }

.library-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}
.library-title { font-size: 15px; font-weight: 700; }
.library-count {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 9px;
  background: var(--bg3);
  border: 1px solid var(--bd);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--t2);
}
.library-card.ok .library-count { color: var(--green); border-color: rgba(90,180,104,0.35); }
.library-card.warn .library-count { color: var(--amber); border-color: rgba(200,154,56,0.35); }
.library-sub {
  margin-top: 2px;
  font-size: 12px;
  color: var(--t3);
  font-weight: 500;
}
.mini-btn {
  padding: 6px 14px;
  background: var(--bg3);
  border: 1px solid var(--bd);
  border-radius: 8px;
  color: var(--t2);
  font-size: 12.5px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 180ms, color 180ms;
}
.mini-btn:hover { color: var(--txt); border-color: rgba(255,255,255,0.2); }

.library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 12px;
}
.slot {
  position: relative;
  background: var(--bg2);
  border: 1px solid var(--bd);
  border-radius: 12px;
  padding: 10px 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 220ms, box-shadow 220ms;
}
.slot.present  { border-color: rgba(90,180,104,0.28); }
.slot.missing  { border-color: rgba(240,115,88,0.45); box-shadow: 0 0 18px -8px rgba(240,115,88,0.3); }
.slot.fresh    { border-color: rgba(78,196,168,0.45); }
.slot-thumb {
  width: 100%;
  height: 72px;
  object-fit: contain;
  background: #fafaf6;
  border-radius: 8px;
  padding: 4px;
}
.slot-thumb.empty {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--t3);
  font-size: 11.5px;
  font-weight: 600;
  background: var(--bg3);
  border: 1px dashed rgba(255,255,255,0.08);
}
.slot-meta { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.slot-name {
  font-size: 12.5px; font-weight: 600;
  color: var(--t2);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.slot .tag {
  align-self: flex-start;
  padding: 2px 7px;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.3px;
  border-radius: 5px;
  text-transform: uppercase;
}
.slot .tag.kept    { background: rgba(90,180,104,0.15); color: var(--green); }
.slot .tag.fresh   { background: rgba(78,196,168,0.18); color: var(--teal); }
.slot .tag.missing { background: rgba(240,115,88,0.18); color: var(--red); }
.slot .tag.idle    { background: rgba(255,255,255,0.05); color: var(--t3); }

.slot-del {
  position: absolute;
  top: 6px; right: 6px;
  width: 22px; height: 22px;
  border: 1px solid var(--bd);
  background: var(--bg3);
  color: var(--t2);
  border-radius: 50%;
  cursor: pointer;
  font-size: 13px; line-height: 1;
  opacity: 0; pointer-events: none;
  transition: opacity 180ms, color 180ms, background 180ms;
}
.slot:hover .slot-del { opacity: 1; pointer-events: auto; }
.slot-del:hover { color: var(--red); background: rgba(240,115,88,0.14); }

/* --- asset strip (legacy, kept for fallback) --------------------------- */
.asset-strip {
  display: inline-flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 8px 10px;
  background: var(--bg2);
  border: 1px solid var(--bd);
  border-radius: 12px;
  backdrop-filter: blur(14px) saturate(160%);
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 700;
  border-radius: 8px;
  background: var(--bg3);
  border: 1px solid var(--bd);
  transition: border-color 220ms;
}
.chip .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--t3);
  box-shadow: 0 0 8px currentColor;
}
.chip.ok       { color: var(--green); border-color: rgba(90,180,104,0.3); }
.chip.ok  .dot { background: var(--green); }
.chip.missing      { color: var(--amber); border-color: rgba(200,154,56,0.3); }
.chip.missing .dot { background: var(--amber); }
.chip.idle { color: var(--t3); opacity: 0.75; }
.chip .tag {
  margin-left: 4px;
  padding: 2px 6px;
  background: rgba(255,255,255,0.06);
  border-radius: 5px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.4px;
  opacity: 0.85;
}

/* --- main -------------------------------------------------------------- */
.app {
  max-width: 960px;
  margin: 0 auto;
  padding: 12px 36px 80px;
  display: grid;
  gap: 28px;
}

.card {
  position: relative;
  background: linear-gradient(145deg, var(--card-grad-a), var(--card-grad-b));
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  border: 1px solid var(--bd);
  border-radius: 18px;
  padding: 24px 26px 26px;
  box-shadow:
    0 1px 0 var(--inset-hi) inset,
    0 10px 28px -14px var(--shadow-deep);
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 22px; right: 22px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.18), transparent);
  pointer-events: none;
}
.t2 { color: var(--t2); }
.t3 { color: var(--t3); }
.small { font-size: 12px; }

/* --- drop zone --------------------------------------------------------- */
.drop-zone {
  border: 2px dashed var(--bd);
  border-radius: 14px;
  padding: 44px 24px;
  background: rgba(255,255,255,0.015);
  cursor: pointer;
  transition: border-color 220ms cubic-bezier(.2,.88,.25,1),
              background 220ms,
              transform 220ms;
}
.drop-zone:hover {
  border-color: rgba(78, 196, 168, 0.5);
  background: rgba(78, 196, 168, 0.04);
}
.drop-zone.dragover {
  border-color: var(--teal);
  background: rgba(78, 196, 168, 0.1);
  transform: scale(1.005);
  box-shadow: 0 0 50px -20px var(--glow-teal) inset;
}
.drop-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}
.drop-icon { font-size: 40px; opacity: 0.85; }
.drop-text strong { font-size: 16px; font-weight: 700; }
.drop-text { font-size: 14px; color: var(--t2); font-weight: 500; }
.hint { font-size: 12px; margin-top: 4px; font-weight: 500; }

/* --- queue ------------------------------------------------------------- */
.queue {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.q-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 10px 14px;
  background: var(--bg2);
  border: 1px solid var(--bd);
  border-radius: 12px;
  transition: border-color 220ms, box-shadow 220ms;
}
.q-row.uncertain {
  border-color: rgba(200, 154, 56, 0.4);
  box-shadow: 0 0 30px -16px var(--glow-amber);
}
.q-name {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.q-icon { font-size: 18px; flex-shrink: 0; }
.q-name .nm {
  font-size: 14px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.q-name .sz {
  font-size: 12px;
  font-family: var(--mono);
  color: var(--t2);
  flex-shrink: 0;
}
.q-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.q-controls select {
  appearance: none;
  background: var(--bg3);
  color: var(--txt);
  border: 1px solid var(--bd);
  border-radius: 8px;
  padding: 7px 28px 7px 12px;
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6' fill='none'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23888' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  transition: border-color 180ms;
}
.q-controls select:hover { border-color: rgba(255,255,255,0.18); }
.q-controls select:focus { outline: none; border-color: var(--teal); }
.q-controls .q-type { min-width: 80px; }
.q-x {
  width: 24px; height: 24px;
  background: var(--bg4);
  border: 1px solid var(--bd);
  border-radius: 50%;
  color: var(--t2);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; line-height: 1;
  transition: color 180ms, background 180ms;
}
.q-x:hover { color: var(--red); background: rgba(240,115,88,0.15); }
.badge {
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.3px;
  border-radius: 7px;
  text-transform: uppercase;
}
.badge.warn { background: rgba(200, 154, 56, 0.18); color: var(--amber); }

/* --- q-caption (confident row summary) -------------------------------- */
.q-caption {
  font-size: 13px;
  font-weight: 600;
  color: var(--t2);
  padding: 6px 10px;
  background: rgba(90, 144, 216, 0.08);
  border: 1px solid rgba(90, 144, 216, 0.2);
  border-radius: 8px;
}
.q-row.uncertain .q-caption { display: none; }

/* --- status bar ------------------------------------------------------- */
.status-bar {
  margin-top: 16px;
  padding: 12px 16px;
  background: var(--bg2);
  border: 1px solid var(--bd);
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--t2);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.status-bar { flex-direction: column; }
.st-line {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  font-size: 13.5px; font-weight: 600;
  line-height: 1.5;
}
.st-line + .st-line { margin-top: 4px; }
.st-hint {
  flex-basis: 100%;
  margin-left: 4px;
  font-size: 12px;
  color: var(--t3);
  font-weight: 500;
}
.st-hint code {
  padding: 1px 6px;
  background: var(--bg3);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--t2);
}
.status-bar .st {
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2px;
}
.status-bar .st.ok   { color: var(--green); background: rgba(90,180,104,0.14); }
.status-bar .st.warn { color: var(--amber); background: rgba(200,154,56,0.15); }
.status-bar .st.err  { color: var(--red);   background: rgba(240,115,88,0.17); }
.status-bar .st.info { color: var(--blue);  background: rgba(90,144,216,0.14); }

/* --- action bar -------------------------------------------------------- */
.actions-bar {
  margin-top: 20px;
  display: flex;
  align-items: center;
  gap: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--bd);
}
.toggle-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--t2);
}
.toggle { display: inline-block; position: relative; width: 44px; height: 24px; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle span {
  position: absolute; inset: 0;
  background: var(--bg3);
  border: 1px solid var(--bd);
  border-radius: 13px;
  cursor: pointer;
  transition: background 220ms cubic-bezier(.2,.88,.25,1);
}
.toggle span::before {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 18px; height: 18px;
  background: var(--txt);
  border-radius: 50%;
  transition: transform 220ms cubic-bezier(.2,.88,.25,1);
  box-shadow: 0 2px 6px rgba(0,0,0,0.4);
}
.toggle input:checked + span { background: var(--teal); }
.toggle input:checked + span::before { transform: translateX(20px); }

/* --- CTA --------------------------------------------------------------- */
.cta {
  flex: 1;
  min-height: 44px;
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 700;
  font-family: inherit;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  color: #0a0f1a;
  transition: transform 220ms cubic-bezier(.2,.88,.25,1),
              box-shadow 220ms, filter 180ms;
  letter-spacing: 0.2px;
}
.cta.teal {
  background: linear-gradient(135deg, #5bd0b2 0%, var(--teal) 100%);
  box-shadow: 0 6px 18px -6px var(--glow-teal);
}
.cta:hover:not(:disabled) { transform: translateY(-1px); filter: brightness(1.05); }
.cta:active:not(:disabled) { transform: translateY(0); }
.cta:disabled { opacity: 0.5; cursor: wait; }
.cta.loading::before {
  content: '';
  display: inline-block;
  width: 14px; height: 14px;
  margin-right: 10px;
  vertical-align: -2px;
  border: 2px solid rgba(0,0,0,0.3);
  border-top-color: #000;
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- toast ------------------------------------------------------------- */
#toast-stack {
  position: fixed;
  top: 24px; right: 24px;
  display: flex; flex-direction: column; gap: 10px;
  z-index: 999; pointer-events: none;
}
.toast {
  pointer-events: auto;
  min-width: 240px; max-width: 360px;
  padding: 12px 16px;
  background: var(--bg2);
  border: 1px solid var(--bd);
  border-radius: 12px;
  backdrop-filter: blur(18px) saturate(160%);
  box-shadow: 0 8px 26px -10px rgba(0,0,0,0.7);
  font-size: 14px; font-weight: 600;
  animation: toast-in 320ms cubic-bezier(.2,.88,.25,1);
}
.toast.ok   { border-color: rgba(90, 180, 104, 0.4); color: var(--green); }
.toast.err  { border-color: rgba(240, 115, 88, 0.4); color: var(--red); }
.toast.info { border-color: rgba(90, 144, 216, 0.4); color: var(--blue); }
@keyframes toast-in {
  from { transform: translateX(20px); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}

/* --- responsive -------------------------------------------------------- */
@media (max-width: 700px) {
  .hero { padding: 32px 20px 16px; }
  .hero h1 { font-size: 26px; }
  .app { padding: 8px 20px 48px; gap: 20px; }
  .card { padding: 18px 18px 20px; }
  .drop-zone { padding: 28px 18px; }
  .q-row { grid-template-columns: 1fr; }
  .q-controls { justify-content: flex-start; }
  .actions-bar { flex-direction: column; align-items: stretch; }
}