:root {
  --bg: #f4f6fb;
  --bg-elevated: #fff;
  --card: #fff;
  --ink: #0b1328;
  --ink-soft: #334155;
  --muted: #64748b;
  --primary: #1e40af;
  --primary-dark: #152b7a;
  --primary-light: #3b82f6;
  --primary-50: #eef2ff;
  --primary-100: #e0e7ff;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --ok: #047857;
  --ok-bg: #d1fae5;
  --err: #b91c1c;
  --err-bg: #fee2e2;
  --wait: #b45309;
  --wait-bg: #fef3c7;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --shadow: 0 4px 12px rgba(15, 23, 42, .08);
  --shadow-lg: 0 8px 32px rgba(15, 23, 42, .12);
  --radius: 10px;
  --radius-lg: 14px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

/* ============ HEADER ============ */
header {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
  color: #fff;
  padding: 14px 0;
  margin-bottom: 28px;
  box-shadow: 0 2px 12px rgba(30, 64, 175, .18);
}
header .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.brand {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -.01em;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.brand-logo {
  width: 32px; height: 32px;
  background: rgba(255,255,255,.14);
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
}
nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}
nav a {
  color: rgba(255,255,255,.86);
  text-decoration: none;
  font-weight: 500;
  font-size: .92rem;
  padding: 7px 14px;
  border-radius: 7px;
  transition: all .15s;
}
nav a:hover { color: #fff; background: rgba(255,255,255,.1); }
.navuser {
  color: rgba(255,255,255,.88);
  margin-left: 10px;
  font-size: .9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.navtag {
  display: inline-block;
  background: rgba(255,255,255,.18);
  color: #fff;
  padding: 1px 8px;
  border-radius: 10px;
  font-size: .68rem;
  font-weight: 700;
  margin-left: 4px;
  letter-spacing: .02em;
}

/* ============ LAYOUT ============ */
main { padding-bottom: 80px; }
footer {
  color: var(--muted);
  padding: 28px 0;
  font-size: .85rem;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

/* ============ CARDS ============ */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}
.card.narrow { max-width: 480px; margin-left: auto; margin-right: auto; }

h1 { margin-top: 0; color: var(--ink); font-weight: 700; font-size: 1.6rem; letter-spacing: -.02em; }
h2 { margin-top: 0; color: var(--ink); font-size: 1.1rem; font-weight: 700; letter-spacing: -.01em; }
h3 { color: var(--ink-soft); font-size: .96rem; margin-top: 20px; margin-bottom: 8px; font-weight: 600; }

.muted { color: var(--muted); }
.row-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* ============ FORMS ============ */
.form label {
  display: block;
  margin-bottom: 16px;
  font-weight: 600;
  color: var(--ink);
  font-size: .9rem;
}
.form label input,
.form label textarea,
.form label select {
  font-weight: 400;
  margin-top: 6px;
}

input[type=text], input[type=email], input[type=password],
input[type=date], input[type=datetime-local], input[type=number],
textarea, select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  background: #fff;
  font: inherit;
  color: var(--ink);
  transition: all .15s;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, .14);
}
input:disabled, textarea:disabled, select:disabled {
  background: #f8fafc; color: var(--muted); cursor: not-allowed;
}

small.muted { display: block; font-weight: 400; color: var(--muted); margin-top: 4px; font-size: .82em; }

/* ============ BUTTONS ============ */
button, .btn, .primary {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 10px 18px;
  border-radius: 7px;
  cursor: pointer;
  font-weight: 600;
  font-size: .92rem;
  transition: all .15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
button:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
button:active { transform: translateY(0); }
button.secondary, .btn-secondary {
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--primary);
}
button.secondary:hover, .btn-secondary:hover { background: var(--primary-50); color: var(--primary-dark); }
button.ghost { background: transparent; color: var(--ink-soft); }
button.ghost:hover { background: var(--primary-50); color: var(--primary); }
.btn-link {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 7px;
  font-weight: 600;
  font-size: .9rem;
  transition: all .15s;
}
.btn-link:hover { background: var(--primary-dark); transform: translateY(-1px); }
.link-danger {
  background: transparent;
  color: var(--err);
  border: none;
  cursor: pointer;
  font-weight: 500;
  padding: 0;
  margin-left: 10px;
  font-size: .9rem;
  text-decoration: underline;
}
.link-danger:hover { color: #7f1d1d; background: transparent; }

/* ============ TABLE ============ */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th {
  color: var(--muted);
  font-size: .74rem;
  text-transform: uppercase;
  letter-spacing: .07em;
  font-weight: 700;
  background: #f8fafc;
}
tbody tr:hover { background: #fafbfe; }

code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: .82em;
  background: var(--primary-50);
  color: var(--primary-dark);
  padding: 2px 6px;
  border-radius: 4px;
}

/* ============ BADGES ============ */
.badge {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .02em;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.badge.ok   { background: var(--ok-bg);   color: var(--ok); }
.badge.err  { background: var(--err-bg);  color: var(--err); }
.badge.wait { background: var(--wait-bg); color: var(--wait); }
.badge.primary { background: var(--primary-50); color: var(--primary); }

/* ============ GRIDS ============ */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 1000px) { .grid-2 { grid-template-columns: 1fr; } }

.sign-grid {
  display: grid;
  grid-template-columns: minmax(320px, 380px) 1fr;
  gap: 24px;
}
@media (max-width: 1000px) { .sign-grid { grid-template-columns: 1fr; } }
.sign-grid .form-side { font-size: .9rem; }
.sign-grid .pdf-side .card { padding: 16px; }

/* ============ DASHBOARD ============ */
.dashboard-hero {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  padding: 30px 32px;
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}
.dashboard-hero h1 { color: #fff; margin: 0 0 6px; font-size: 1.5rem; }
.dashboard-hero p { color: rgba(255,255,255,.9); margin: 0; }

.action-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin-bottom: 28px;
}
.action-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: all .18s;
  display: block;
  position: relative;
  overflow: hidden;
}
.action-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.action-card .icon {
  width: 44px; height: 44px;
  background: var(--primary-50);
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 14px;
  color: var(--primary);
}
.action-card h3 {
  margin: 0 0 6px;
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 700;
}
.action-card p { margin: 0; color: var(--muted); font-size: .88rem; }
.action-card .arrow {
  position: absolute;
  top: 24px; right: 24px;
  color: var(--border-strong);
  transition: all .18s;
}
.action-card:hover .arrow { color: var(--primary); transform: translateX(3px); }

.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}
.stat-tile {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.stat-tile .label {
  color: var(--muted);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  font-weight: 600;
  margin-bottom: 4px;
}
.stat-tile .value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.1;
}
.stat-tile .sub { color: var(--muted); font-size: .82rem; margin-top: 2px; }

/* ============ KV / INFO BOX ============ */
.kv { display: grid; grid-template-columns: 180px 1fr; gap: 10px 20px; }
.kv dt { color: var(--muted); font-weight: 500; font-size: .88rem; }
.kv dd { margin: 0; word-break: break-all; font-size: .9rem; }

.checks { list-style: none; padding-left: 0; }
.checks li {
  padding: 11px 14px;
  border-radius: 7px;
  margin-bottom: 8px;
  background: var(--primary-50);
  font-size: .9rem;
}
.checks li.ok  { background: var(--ok-bg); color: var(--ok); }
.checks li.err { background: var(--err-bg); color: var(--err); }

.flashes { margin-bottom: 20px; }
.flash {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 10px;
  font-size: .92rem;
  display: flex;
  align-items: center;
  gap: 10px;
}
.flash.error { background: var(--err-bg); color: var(--err); border-left: 3px solid var(--err); }
.flash.message { background: var(--primary-50); color: var(--primary-dark); border-left: 3px solid var(--primary); }

.info-box {
  background: var(--primary-50);
  border-left: 4px solid var(--primary);
  padding: 14px 18px;
  border-radius: 6px;
  margin-top: 12px;
  font-size: .92rem;
}

/* ============ SIGNERS ============ */
.signer-line { line-height: 1.4; font-size: .9em; }
.signer-line .dot { color: var(--primary); }
.signers { list-style: none; padding: 0; }
.signers li { padding: 10px 0; border-bottom: 1px solid var(--border); font-size: .92rem; }
.signers li:last-child { border-bottom: none; }
.files { list-style: none; padding-left: 0; }
.files li { padding: 6px 0; font-size: .9rem; }

/* ============ POSITION PICKER ============ */
.pos-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin: 8px 0 4px;
  max-width: 280px;
}
.pos-grid label {
  margin: 0;
  font-weight: 500;
  background: #fff;
  border: 1.5px solid var(--border-strong);
  border-radius: 7px;
  padding: 10px 0;
  text-align: center;
  cursor: pointer;
  user-select: none;
  font-size: .82em;
  transition: all .12s;
}
.pos-grid input[type=checkbox] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.pos-grid label:has(input:checked) {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.pos-grid label:hover { border-color: var(--primary-light); }

/* ============ CHAIN ============ */
.chain-explainer {
  background: var(--primary-50);
  border-left: 4px solid var(--primary);
  padding: 14px 18px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-size: .92rem;
}
.chain-explainer code { background: rgba(255,255,255,.75); }
.chain-flow { font-family: ui-monospace, Menlo, monospace; font-size: .82em; color: var(--muted); }
.chain-arrow { color: var(--primary); font-weight: 700; }

/* ============ FIELDSETS ============ */
fieldset.perms {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 18px;
}
fieldset.perms legend { color: var(--primary); font-weight: 600; padding: 0 8px; font-size: .9rem; }
label.cb { display: block; margin-bottom: 11px; font-weight: 400; font-size: .9rem; }
label.cb input[type=checkbox] { margin-right: 7px; }

/* ============ DRAG-DROP ============ */
.position-mode-tabs {
  display: flex;
  gap: 2px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.position-mode-tabs button {
  background: transparent;
  color: var(--muted);
  border: none;
  border-bottom: 2px solid transparent;
  padding: 9px 16px;
  font-weight: 600;
  font-size: .88rem;
  cursor: pointer;
  border-radius: 0;
  transition: all .15s;
}
.position-mode-tabs button:hover { background: transparent; color: var(--primary); transform: none; box-shadow: none; }
.position-mode-tabs button.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.pos-section { margin-bottom: 12px; }
.pos-section.hidden { display: none; }

#pdf-canvas-wrap {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: #f5f5f5;
}
#pdf-canvas { display: block; max-width: 100%; height: auto; }
.draggable-stamp {
  position: absolute;
  background: rgba(238, 242, 255, .75);
  border: 1.5px dashed var(--primary);
  border-radius: 5px;
  padding: 6px 8px;
  cursor: grab;
  user-select: none;
  font-size: .68rem;
  color: var(--primary-dark);
  font-family: ui-monospace, Menlo, monospace;
  text-align: center;
  min-width: 110px;
  z-index: 10;
  box-shadow: 0 2px 8px rgba(30, 64, 175, .2);
}
.draggable-stamp:active { cursor: grabbing; }
.draggable-stamp .sig-name {
  font-family: "Brush Script MT", "Caveat", "Snell Roundhand", cursive;
  font-size: 1.1rem;
  font-style: italic;
  color: var(--primary-dark);
  display: block;
  margin-bottom: 2px;
}
.draggable-stamp .sig-divider {
  border-top: 1px solid var(--primary-dark);
  margin: 1px 4px 2px;
}
.draggable-stamp .sig-verified {
  font-weight: 700;
  font-size: .64rem;
  letter-spacing: .03em;
}
.drag-hint {
  background: var(--primary-50);
  color: var(--primary-dark);
  padding: 9px 13px;
  border-radius: 6px;
  font-size: .85rem;
  margin-bottom: 10px;
}
.pdf-nav {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 10px;
  font-size: .9rem;
}
.pdf-nav button {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--border-strong);
  padding: 5px 11px;
  font-size: .85rem;
}
.pdf-nav button:hover { background: var(--primary-50); transform: none; box-shadow: none; }

/* ============ RESPONSIVE ============ */
@media (max-width: 640px) {
  .wrap { padding: 0 14px; }
  header { padding: 12px 0; margin-bottom: 20px; }
  .brand { font-size: 1rem; }
  nav a { padding: 5px 10px; font-size: .85rem; margin-left: 6px; }
  .navuser { display: none; }
  .card { padding: 18px 20px; }
  h1 { font-size: 1.3rem; }
  .dashboard-hero { padding: 22px 20px; }
}