/* BuildForm overlay — desktop modal / mobile bottom sheet (spec §6).
   Palette rides css/brand-tokens.css (tokens-1); fallbacks mirror tokens. */

.build-form-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(4, 5, 10, 0.72);
  backdrop-filter: blur(3px);
  padding: 24px 16px;
}
.build-form-overlay.open { display: flex; }

.build-form-dialog {
  position: relative;
  width: min(560px, 100%);
  max-height: min(86vh, 720px);
  overflow-y: auto;
  background: var(--tfl-bg-2, #141826);
  border: 1px solid var(--tfl-line-2, rgba(255, 255, 255, 0.12));
  border-radius: 14px;
  padding: 28px 28px 24px;
  color: var(--tfl-text-1, #d6dae6);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.55);
  animation: bf-enter 180ms cubic-bezier(0.16, 1, 0.3, 1);
}
.build-form-dialog,
.build-form-dialog *,
.build-form-dialog *::before,
.build-form-dialog *::after { box-sizing: border-box; }
@keyframes bf-enter {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  .build-form-dialog { animation: none; }
}

#build-form-title {
  padding-right: 36px;
  margin: 0 0 4px;
  font-family: 'Barlow Condensed', 'Bebas Neue', Inter, sans-serif;
  font-size: 1.7rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--tfl-text-0, #f5f7fb);
}
.bf-sub { margin: 0 0 18px; font-size: 0.92rem; color: var(--tfl-text-2, #8c92a8); }

.bf-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--tfl-text-2, #8c92a8);
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
}
.bf-close:hover, .bf-close:focus-visible { color: var(--tfl-text-0, #f5f7fb); background: var(--tfl-surface-2, rgba(255, 255, 255, 0.05)); }

.bf-form { display: grid; gap: 16px; }
.bf-field { display: grid; gap: 6px; font-size: 0.85rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--tfl-text-2, #8c92a8); }
.bf-optional { font-weight: 400; text-transform: none; letter-spacing: 0; }

.bf-field input,
.bf-field select {
  min-height: 56px;
  padding: 14px 16px;
  font: 500 1.05rem/1.3 Inter, system-ui, sans-serif;
  color: var(--tfl-text-0, #f5f7fb);
  background: var(--tfl-bg-1, #0d0f1a);
  border: 1px solid var(--tfl-line-2, rgba(255, 255, 255, 0.12));
  border-radius: 10px;
}
.bf-field select {
  height: 56px;
  padding: 0 44px 0 16px;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%238C92A8' stroke-width='1.75' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 12px 8px;
  cursor: pointer;
}
.bf-field input:focus-visible,
.bf-field select:focus-visible,
.bf-class-chip input:focus-visible {
  outline: 2px solid var(--tfl-indigo, #818cf8);
  outline-offset: 1px;
}

.bf-classes { display: flex; gap: 10px; border: 0; margin: 0; padding: 0; }
.bf-classes legend { font-size: 0.85rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--tfl-text-2, #8c92a8); margin-bottom: 6px; }
.bf-class-chip {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  border: 1px solid var(--tfl-line-2, rgba(255, 255, 255, 0.12));
  border-radius: 10px;
  font-weight: 700;
  cursor: pointer;
  color: var(--tfl-text-1, #d6dae6);
  background: var(--tfl-bg-1, #0d0f1a);
}
.bf-class-chip input { position: absolute; opacity: 0; pointer-events: none; }
.bf-class-chip.on {
  border-color: var(--tfl-indigo, #818cf8);
  color: var(--tfl-text-0, #f5f7fb);
  background: color-mix(in srgb, var(--tfl-indigo, #818cf8) 16%, var(--tfl-bg-1, #0d0f1a));
}
.bf-locked-class { margin: 0; font-size: 0.95rem; color: var(--tfl-text-1, #d6dae6); }

.bf-gadgets { display: grid; gap: 16px; }

.bf-error { margin: 0; padding: 10px 12px; border-radius: 10px; background: rgba(228, 3, 46, 0.12); border: 1px solid rgba(228, 3, 46, 0.4); color: #ffb4be; font-size: 0.92rem; }
.build-form-live { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }

.bf-actions { display: flex; gap: 12px; align-items: center; margin-top: 4px; }
.bf-submit, .bf-done {
  min-height: 54px;
  padding: 0 26px;
  border: 0;
  border-radius: 10px;
  font: 700 1rem/1 Inter, system-ui, sans-serif;
  letter-spacing: 0.03em;
  cursor: pointer;
  color: #0a0c14;
  background: linear-gradient(135deg, var(--tfl-indigo, #818cf8), var(--tfl-cyan, #22d3ee));
}
.bf-submit:disabled { opacity: 0.6; cursor: default; }
.bf-submit:hover:not(:disabled), .bf-done:hover { filter: brightness(1.1); }
.bf-view-link { color: var(--tfl-cyan, #22d3ee); font-weight: 600; min-height: 44px; display: inline-flex; align-items: center; }

.bf-success-headline { margin: 8px 0 4px; font-size: 1.15rem; font-weight: 700; color: var(--tfl-text-0, #f5f7fb); }
.bf-success-detail { margin: 0 0 14px; color: var(--tfl-text-2, #8c92a8); }
.bf-loading { margin: 20px 0; color: var(--tfl-text-2, #8c92a8); }

/* Mobile: bottom sheet */
@media (max-width: 767px) {
  .build-form-overlay { align-items: flex-end; padding: 0; }
  .build-form-dialog {
    width: 100%;
    max-height: 92vh;
    border-radius: 16px 16px 0 0;
    padding: 24px 18px calc(20px + env(safe-area-inset-bottom));
  }
  .bf-classes { flex-direction: row; }
}

.bf-extra summary { min-height:44px; cursor:pointer; padding:12px 0; color:#bbc0ce; font-size:14px; }
.bf-extra .bf-field { margin-top:14px; }