/* === reset + tokens =================================================== */
*,
*::before,
*::after { box-sizing: border-box; }

:root {
  /* Surfaces — slightly warm, near-black, with a touch of blue at depth. */
  --bg:        #08080b;
  --bg-1:      #0e0e12;
  --bg-2:      #15151b;
  --bg-3:      #1d1d25;
  --bg-4:      #25252e;
  --line:      #232330;
  --line-2:    #303042;
  --line-3:    #424258;

  /* Text */
  --fg:        #f5f5f7;
  --fg-2:      #d8d8e0;
  --fg-dim:    #9a9aa8;
  --fg-mute:   #5f5f6e;

  /* Brand accent — a soft electric violet */
  --accent:    #8b5cf6;
  --accent-2:  #a78bfa;
  --accent-3:  #c4b5fd;
  --accent-glow: 139, 92, 246;

  --danger:    #ef4444;
  --danger-2:  #f87171;
  --success:   #10b981;

  /* Tier palette — modern jewel tones. Each tier gets a base + lighter
     gradient stop + RGB triple for glow. Hues step distinctly so adjacent
     tiers never read as "same color, slightly different". */
  --tier-s:    #ef4365;   --tier-s-2:  #ff7a92;   --tier-s-glow: 239, 67, 101;
  --tier-a:    #fb923c;   --tier-a-2:  #ffb874;   --tier-a-glow: 251, 146, 60;
  --tier-b:    #eab308;   --tier-b-2:  #facc15;   --tier-b-glow: 234, 179, 8;
  --tier-c:    #10b981;   --tier-c-2:  #34d399;   --tier-c-glow: 16, 185, 129;
  --tier-d:    #0ea5e9;   --tier-d-2:  #38bdf8;   --tier-d-glow: 14, 165, 233;
  --tier-f:    #8b5cf6;   --tier-f-2:  #a78bfa;   --tier-f-glow: 139, 92, 246;

  /* Geometry */
  --radius-sm: 10px;
  --radius:    14px;
  --radius-lg: 20px;

  /* Shadows */
  --shadow-1:  0 1px 2px rgba(0,0,0,.35);
  --shadow-2:  0 6px 18px rgba(0,0,0,.45), 0 1px 2px rgba(0,0,0,.4);
  --shadow-3:  0 18px 50px rgba(0,0,0,.55), 0 2px 6px rgba(0,0,0,.4);

  --ease:      cubic-bezier(.2,.7,.2,1);
  --dur:       .18s;

  font-feature-settings: "cv02","cv03","cv04","cv11","ss01";
  color-scheme: dark;
}

html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  letter-spacing: -0.005em;
  overflow-x: hidden;
  position: relative;
}

/* Ambient glow behind the content — gives depth without using a visible image. */
body::before {
  content: '';
  position: fixed;
  inset: -10vmin;
  background:
    radial-gradient(60vmin 40vmin at 18% 0%,  rgba(139,92,246,.18), transparent 60%),
    radial-gradient(60vmin 40vmin at 90% 5%,  rgba(244,63,94,.10), transparent 60%),
    radial-gradient(80vmin 50vmin at 50% 110%, rgba(14,165,233,.10), transparent 60%);
  filter: blur(20px);
  z-index: -1;
  pointer-events: none;
}

@supports (font-variation-settings: normal) {
  body { font-family: 'InterVariable', 'Inter', sans-serif; }
}

button { font: inherit; color: inherit; }
input  { font: inherit; color: inherit; }

::selection { background: rgba(var(--accent-glow), .35); color: var(--fg); }

/* === topbar =========================================================== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 24px;
  background: linear-gradient(180deg, rgba(8,8,11,.85), rgba(8,8,11,.55));
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 14px; min-width: 0; }
.brand-mark {
  position: relative;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 12px;
  background:
    radial-gradient(120% 120% at 0% 0%, var(--tier-s) 0%, transparent 50%),
    radial-gradient(120% 120% at 100% 100%, var(--tier-f) 0%, transparent 50%),
    linear-gradient(135deg, var(--tier-a), var(--tier-d));
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  letter-spacing: -0.04em;
  box-shadow:
    var(--shadow-1),
    inset 0 1px 0 rgba(255,255,255,.35),
    inset 0 -1px 0 rgba(0,0,0,.25),
    0 0 30px rgba(var(--tier-f-glow), .25);
  text-shadow: 0 1px 2px rgba(0,0,0,.35);
}
.brand-text { display: flex; flex-direction: column; min-width: 0; }
.brand-title {
  font-weight: 600;
  letter-spacing: -.01em;
  font-size: 12px;
  color: var(--fg-dim);
  text-transform: uppercase;
}
.brand-subtitle {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.025em;
  background: transparent;
  border: 0;
  outline: 0;
  padding: 2px 0;
  min-width: 0;
  width: min(48ch, 60vw);
  border-radius: 6px;
  transition: background var(--dur) var(--ease), padding var(--dur) var(--ease);
  color: var(--fg);
}
.brand-subtitle:hover,
.brand-subtitle:focus {
  background: rgba(255,255,255,.04);
  padding-left: 8px;
  padding-right: 8px;
}

.actions { display: flex; align-items: center; gap: 8px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 14px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  font-weight: 500;
  font-size: 13.5px;
  letter-spacing: -.005em;
  transition:
    background var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform .08s var(--ease),
    color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
  white-space: nowrap;
  position: relative;
}
.btn:active { transform: translateY(1px); }
.btn-icon {
  font-size: 14px;
  line-height: 1;
  display: inline-grid;
  place-items: center;
  width: 14px;
  height: 14px;
}

.btn-primary {
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  color: #fff;
  border-color: transparent;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.25),
    inset 0 -1px 0 rgba(0,0,0,.15),
    0 6px 18px rgba(var(--accent-glow), .35);
}
.btn-primary:hover {
  filter: brightness(1.08);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.3),
    inset 0 -1px 0 rgba(0,0,0,.15),
    0 8px 22px rgba(var(--accent-glow), .45);
}

.btn-ghost {
  background: rgba(255,255,255,.03);
  border-color: var(--line-2);
  color: var(--fg);
}
.btn-ghost:hover {
  background: rgba(255,255,255,.06);
  border-color: var(--line-3);
}

.btn-quiet {
  background: transparent;
  color: var(--fg-dim);
  border-color: transparent;
}
.btn-quiet:hover { color: var(--fg); background: rgba(255,255,255,.04); }

/* === stage / layout =================================================== */
.stage {
  max-width: 1320px;
  margin: 0 auto;
  padding: 28px 24px 80px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

/* === tiers ============================================================ */
.tiers {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: linear-gradient(180deg, rgba(255,255,255,.025), rgba(255,255,255,.01));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 10px;
  box-shadow: var(--shadow-2);
}

.tier-row {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 10px;
  align-items: stretch;
  min-height: 64px;
}

.tier-label {
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  font-weight: 800;
  font-size: 32px;
  letter-spacing: -.05em;
  color: #fff;
  user-select: none;
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, var(--tier-2) 0%, var(--tier) 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.35),
    inset 0 -1px 0 rgba(0,0,0,.25),
    0 0 28px -6px rgba(var(--tier-glow), .55);
  text-shadow: 0 1px 2px rgba(0,0,0,.25);
}
/* Subtle inner sheen */
.tier-label::before {
  content: '';
  position: absolute;
  inset: 1px;
  border-radius: calc(var(--radius) - 1px);
  background:
    radial-gradient(120% 80% at 50% 0%, rgba(255,255,255,.18) 0%, transparent 55%),
    linear-gradient(180deg, transparent 60%, rgba(0,0,0,.12) 100%);
  pointer-events: none;
}

.tier-row[data-tier="S"] .tier-label { --tier: var(--tier-s); --tier-2: var(--tier-s-2); --tier-glow: var(--tier-s-glow); }
.tier-row[data-tier="A"] .tier-label { --tier: var(--tier-a); --tier-2: var(--tier-a-2); --tier-glow: var(--tier-a-glow); }
.tier-row[data-tier="B"] .tier-label { --tier: var(--tier-b); --tier-2: var(--tier-b-2); --tier-glow: var(--tier-b-glow); }
.tier-row[data-tier="C"] .tier-label { --tier: var(--tier-c); --tier-2: var(--tier-c-2); --tier-glow: var(--tier-c-glow); }
.tier-row[data-tier="D"] .tier-label { --tier: var(--tier-d); --tier-2: var(--tier-d-2); --tier-glow: var(--tier-d-glow); }
.tier-row[data-tier="F"] .tier-label { --tier: var(--tier-f); --tier-2: var(--tier-f-2); --tier-glow: var(--tier-f-glow); }

.tier-drop {
  background: rgba(255,255,255,.015);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-content: flex-start;
  transition:
    background var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
  position: relative;
}
.tier-drop.is-over,
.tier-row:has(.tier-drop:hover) .tier-drop {
  background: rgba(255,255,255,.04);
  border-color: var(--line-3);
}
body.is-dragging .tier-drop {
  background: rgba(255,255,255,.025);
  border-style: dashed;
}
.tier-drop:empty::before {
  content: 'Drop here';
  color: var(--fg-mute);
  font-size: 12.5px;
  align-self: center;
  margin: 0 auto;
  letter-spacing: .03em;
  text-transform: uppercase;
  font-weight: 500;
}

/* === pool ============================================================= */
.pool-wrap {
  background:
    linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.005));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-2);
}
.pool-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 14px;
  gap: 12px;
}
.pool-title {
  margin: 0;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--fg-dim);
  text-transform: uppercase;
}
.pool-meta {
  font-size: 12.5px;
  color: var(--fg-mute);
}
.pool-meta b { color: var(--fg-2); font-weight: 600; }
.pool {
  min-height: 130px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(0,0,0,.2);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.pool.is-over { background: rgba(255,255,255,.03); border-color: var(--line-3); }
body.is-dragging .pool { border-style: dashed; }
.pool:empty::before {
  content: 'Add items manually or generate with AI';
  color: var(--fg-mute);
  margin: auto;
  font-size: 13px;
  letter-spacing: -.005em;
}

/* === item card ======================================================== */
.card {
  --card-w: 132px;
  width: var(--card-w);
  background: linear-gradient(180deg, var(--bg-3), var(--bg-2));
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: grab;
  display: flex;
  flex-direction: column;
  position: relative;
  transition:
    transform .14s var(--ease),
    border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
  box-shadow: var(--shadow-1);
}
.card:hover {
  border-color: var(--line-3);
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}
.card:active { cursor: grabbing; }

.card-thumb {
  width: 100%;
  aspect-ratio: 1 / 1;
  background:
    radial-gradient(80% 60% at 50% 30%, rgba(255,255,255,.05), transparent 70%),
    linear-gradient(160deg, var(--bg-4), var(--bg-3));
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}
.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.card-thumb-fallback {
  font-weight: 700;
  font-size: 26px;
  letter-spacing: -.04em;
  color: var(--fg-2);
  text-align: center;
  padding: 8px;
  word-break: break-word;
  line-height: 1;
  background:
    radial-gradient(60% 60% at 50% 50%, rgba(255,255,255,.05), transparent 80%);
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
}

.card-body {
  padding: 9px 11px 11px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 46px;
}
.card-title {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: -.005em;
  line-height: 1.25;
  color: var(--fg);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-subtitle {
  font-size: 11px;
  color: var(--fg-mute);
  line-height: 1.25;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-actions {
  position: absolute;
  top: 6px;
  right: 6px;
  display: flex;
  gap: 4px;
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.card:hover .card-actions,
.card:focus-within .card-actions {
  opacity: 1;
  transform: translateY(0);
}

.card-action {
  width: 26px; height: 26px;
  display: grid; place-items: center;
  border-radius: 7px;
  background: rgba(0,0,0,.55);
  border: 1px solid rgba(255,255,255,.1);
  color: #fff;
  cursor: pointer;
  font-size: 13px;
  line-height: 1;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: background .12s var(--ease), color .12s var(--ease), border-color .12s var(--ease);
}
.card-action:hover { background: rgba(0,0,0,.78); border-color: rgba(255,255,255,.18); }
.card-action.is-danger:hover { background: var(--danger); color: #fff; border-color: var(--danger-2); }

/* SortableJS classes */
.sortable-ghost { opacity: .25; }
.sortable-chosen {
  box-shadow:
    var(--shadow-3),
    0 0 0 1px var(--accent-2),
    0 0 36px -6px rgba(var(--accent-glow), .5);
  border-color: var(--accent-2);
}
.sortable-drag { cursor: grabbing; }

/* === modal ============================================================ */
.modal {
  border: 0;
  padding: 0;
  background: transparent;
  color: inherit;
  max-width: 540px;
  width: calc(100% - 32px);
}
.modal-wide { max-width: 880px; }
.modal::backdrop {
  background: rgba(2,2,4,.65);
}

body.has-modal-open::before {
  filter: none;
}

body.has-modal-open .topbar {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: rgba(8,8,11,.95);
}
.modal-form,
.modal > .modal-head {
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  border: 1px solid var(--line-2);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-3);
  padding: 22px;
}
.modal:not(.modal-wide) .modal-form { padding: 22px; }
.modal-wide .modal-head {
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  margin-bottom: 0;
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.modal-head h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.018em;
}
.icon-btn {
  width: 32px; height: 32px;
  border-radius: 8px;
  border: 0;
  background: transparent;
  color: var(--fg-dim);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
}
.icon-btn:hover { background: rgba(255,255,255,.05); color: var(--fg); }

.modal-form { display: flex; flex-direction: column; gap: 14px; }
.modal-foot {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 6px;
}
.btn-autofill { margin-right: auto; }

.field { display: flex; flex-direction: column; gap: 6px; }
.field > span {
  font-size: 12.5px;
  font-weight: 500;
  color: var(--fg-dim);
  letter-spacing: -.005em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.field em {
  font-style: normal;
  color: var(--fg-mute);
  font-weight: 400;
  font-size: 11.5px;
}
.field input {
  height: 40px;
  padding: 0 13px;
  background: var(--bg);
  border: 1px solid var(--line-2);
  border-radius: 10px;
  outline: 0;
  transition: border-color .12s var(--ease), background .12s var(--ease), box-shadow .12s var(--ease);
}
.field input:focus {
  border-color: var(--accent-2);
  background: rgba(255,255,255,.025);
  box-shadow: 0 0 0 3px rgba(var(--accent-glow), .15);
}
.field input::placeholder { color: var(--fg-mute); }

.chip-row { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  padding: 7px 13px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  background: rgba(255,255,255,.02);
  color: var(--fg-dim);
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  transition: background .12s var(--ease), border-color .12s var(--ease), color .12s var(--ease), box-shadow .12s var(--ease);
}
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip:hover { border-color: var(--line-3); color: var(--fg-2); }
.chip:has(input:checked) {
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(var(--accent-glow), .35);
}

.ai-status {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border: 1px solid var(--line-2);
  border-radius: 12px;
  background: rgba(255,255,255,.02);
  font-size: 12.5px;
}
.ai-status-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--accent-2);
  position: relative;
  flex-shrink: 0;
}
.ai-status-dot::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--accent-2);
  animation: pulse 1.6s var(--ease) infinite;
}
.ai-status-text {
  flex: 1;
  min-width: 0;
  color: var(--fg-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ai-status-count { color: var(--fg); font-weight: 600; font-variant-numeric: tabular-nums; }

@keyframes pulse {
  0%   { transform: scale(1);   opacity: .6; }
  70%  { transform: scale(2.6); opacity: 0; }
  100% { transform: scale(2.6); opacity: 0; }
}

/* embed iframe */
.embed-frame {
  background: #000;
  border: 1px solid var(--line-2);
  border-top: 0;
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
  overflow: hidden;
}
.embed-frame iframe,
.embed-frame video,
.embed-frame img {
  display: block;
  width: 100%;
  aspect-ratio: 16/9;
  border: 0;
}
.embed-frame img { aspect-ratio: auto; max-height: 80vh; object-fit: contain; }
.embed-frame .embed-empty {
  padding: 36px;
  text-align: center;
  color: var(--fg-mute);
  font-size: 13px;
}
.embed-frame .embed-empty a {
  color: var(--accent-3);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
}

/* === toast ============================================================ */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%) translateY(20px);
  background: linear-gradient(180deg, var(--bg-3), var(--bg-2));
  border: 1px solid var(--line-3);
  color: var(--fg);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13px;
  box-shadow: var(--shadow-2);
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s var(--ease), transform .22s var(--ease);
  z-index: 50;
}
.toast.is-on {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* === responsive ======================================================= */
@media (max-width: 720px) {
  .topbar { padding: 12px 16px; flex-wrap: wrap; }
  .brand-subtitle { width: 100%; font-size: 17px; }
  .actions { width: 100%; }
  .actions .btn { flex: 1; justify-content: center; }
  .stage { padding: 18px 16px 60px; gap: 16px; }
  .tier-row { grid-template-columns: 66px 1fr; min-height: 56px; }
  .tier-label { font-size: 26px; }
  .card { --card-w: 108px; }
  .card-title { font-size: 12px; }
  .card-subtitle { font-size: 10.5px; }
}

@media (max-width: 420px) {
  .card { --card-w: 96px; }
  .tier-row { grid-template-columns: 56px 1fr; }
  .tier-label { font-size: 24px; }
}

/* Reduced motion respect */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}