:root {
  --bg:        #f0f2f5;
  --surface:   #ffffff;
  --surface-2: #f8f9fb;
  --line:      #e5e7eb;
  --line-2:    #f0f1f3;
  --line-strong: #d1d5db;

  --ink:       #111827;
  --ink-2:     #374151;
  --ink-3:     #6b7280;
  --ink-4:     #9ca3af;

  --navy:      #1a56db;
  --navy-2:    #1648b8;
  --navy-soft: #eff4ff;

  --st-pending:    #d97706;
  --st-pending-bg: #fef3c7;
  --st-signed:     #059669;
  --st-signed-bg:  #d1fae5;
  --st-rejected:   #dc2626;
  --st-rejected-bg:#fee2e2;
  --st-expired:    #6b7280;
  --st-expired-bg: #f3f4f6;

  --accent:    #dc2626;
  --focus:     #1a56db;

  --font-sans: "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Source Serif 4", "Iowan Old Style", Georgia, serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,.06);
  --shadow-lg: 0 20px 50px rgba(0,0,0,.12);
}

.firma-root {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

.f-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  white-space: nowrap;
}
.f-pill::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: currentColor;
  opacity: .7;
}
.f-pill.pendiente { color: var(--st-pending); background: var(--st-pending-bg); }
.f-pill.firmado  { color: var(--st-signed);  background: var(--st-signed-bg); }
.f-pill.rechazado { color: var(--st-rejected); background: var(--st-rejected-bg); }
.f-pill.cancelado { color: var(--st-rejected); background: var(--st-rejected-bg); }
.f-pill.expirado { color: var(--st-expired); background: var(--st-expired-bg); }

.f-btn {
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  height: 36px;
  padding: 0 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  cursor: pointer;
  transition: background .12s, border-color .12s, box-shadow .12s;
}
.f-btn:hover { background: var(--surface-2); border-color: var(--line-strong); }
.f-btn.primary { background: var(--navy); color: #fff; border-color: var(--navy); }
.f-btn.primary:hover { background: var(--navy-2); }
.f-btn.ghost { border-color: transparent; background: transparent; }
.f-btn.ghost:hover { background: var(--navy-soft); }

.f-input {
  font-family: inherit;
  font-size: 14px;
  height: 40px;
  padding: 0 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.f-input:focus { border-color: var(--focus); box-shadow: 0 0 0 3px rgba(26,86,219,.1); }

@keyframes f-dl-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(5,150,105,.3); }
  100% { box-shadow: 0 0 0 10px rgba(5,150,105,0); }
}
.f-dl-pulse { animation: f-dl-pulse .6s ease-out; }

@keyframes f-dl-bar {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}
.f-dl-bar { position: relative; overflow: hidden; }
.f-dl-bar::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 20%, rgba(255,255,255,.4) 50%, transparent 80%);
  animation: f-dl-bar 1s ease-in-out;
}

.f-scroll::-webkit-scrollbar { width: 8px; height: 8px; }
.f-scroll::-webkit-scrollbar-thumb { background: rgba(0,0,0,.1); border-radius: 8px; border: 2px solid transparent; background-clip: padding-box; }
.f-scroll::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,.2); border: 2px solid transparent; background-clip: padding-box; }
.f-scroll::-webkit-scrollbar-track { background: transparent; }

/* ── Combobox ─────────────────────────────────────────────── */
.cb-wrap { position: relative; width: 100%; }

.cb-trigger {
  font-family: inherit;
  font-size: 14px;
  height: 40px;
  width: 100%;
  padding: 0 36px 0 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  transition: border-color .15s, box-shadow .15s;
  position: relative;
}
.cb-trigger:hover { border-color: var(--line-strong); }
.cb-trigger.open { border-color: var(--focus); box-shadow: 0 0 0 3px rgba(26,86,219,.1); }

.cb-trigger-text {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.cb-placeholder { color: var(--ink-4); }

.cb-chevron {
  position: absolute;
  right: 10px;
  color: var(--ink-3);
  transition: transform .15s ease;
  flex-shrink: 0;
}
.cb-chevron.up { transform: rotate(180deg); }

.cb-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  box-shadow: var(--shadow-md);
  z-index: 50;
  overflow: hidden;
  animation: cb-open .12s ease-out;
}
@keyframes cb-open {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: none; }
}

.cb-search-wrap {
  padding: 8px 8px 4px;
  border-bottom: 1px solid var(--line-2);
}
.cb-search {
  font-family: inherit;
  font-size: 13px;
  width: 100%;
  height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-2);
  color: var(--ink);
  outline: none;
  box-sizing: border-box;
}
.cb-search:focus { border-color: var(--focus); background: var(--surface); }
.cb-search::placeholder { color: var(--ink-4); }

.cb-list {
  max-height: 240px;
  overflow-y: auto;
  padding: 4px;
}
.cb-list::-webkit-scrollbar { width: 6px; }
.cb-list::-webkit-scrollbar-thumb { background: rgba(0,0,0,.12); border-radius: 6px; }
.cb-list::-webkit-scrollbar-track { background: transparent; }

.cb-option {
  font-family: inherit;
  font-size: 14px;
  width: 100%;
  padding: 9px 12px;
  border: none;
  background: transparent;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  border-radius: 6px;
  transition: background .08s;
  display: block;
}
.cb-option:hover { background: var(--surface-2); }
.cb-option.selected {
  background: var(--navy-soft);
  color: var(--navy);
  font-weight: 500;
}

.cb-empty {
  padding: 16px 12px;
  font-size: 13px;
  color: var(--ink-4);
  text-align: center;
}