@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');
:root {
  --bg: #f5f6fa; --panel: #ffffff; --ink: #0f172a; --ink-2: #334155; --muted: #64748b; --line: #e6e8ef; --line-2: #d5d9e3;
  --accent: #4f46e5; --accent-2: #6366f1; --accent-soft: #eef2ff; --accent-ink: #fff;
  --danger: #e11d48; --danger-soft: #fff1f2; --ok: #059669; --ok-soft: #ecfdf5; --warn: #d97706; --warn-soft: #fffbeb;
  --radius: 12px; --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(15,23,42,.05); --shadow: 0 1px 2px rgba(15,23,42,.05), 0 8px 24px -8px rgba(15,23,42,.12); --shadow-lg: 0 24px 64px -12px rgba(15,23,42,.28);
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body { font: 14px/1.5 Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif; color: var(--ink); background: var(--bg); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3 { letter-spacing: -.01em; }
svg.i { width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 7px; padding: 9px 15px; border-radius: 10px; border: 1px solid var(--line-2); background: #fff; color: var(--ink); font-weight: 500; cursor: pointer; white-space: nowrap; transition: background .15s, box-shadow .15s, transform .05s; box-shadow: var(--shadow-sm); }
.btn:hover { background: #f8fafc; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; }
.btn.primary { background: linear-gradient(180deg, var(--accent-2), var(--accent)); color: var(--accent-ink); border-color: var(--accent); box-shadow: 0 1px 2px rgba(79,70,229,.3), inset 0 1px 0 rgba(255,255,255,.15); }
.btn.primary:hover { filter: brightness(1.06); }
.btn.ok { background: linear-gradient(180deg, #10b981, var(--ok)); color: #fff; border-color: var(--ok); }
.btn.danger { color: var(--danger); }
.btn.danger:hover { background: var(--danger-soft); }
.btn.ghost { border-color: transparent; box-shadow: none; background: transparent; }
.btn.ghost:hover { background: #eef0f6; }
.btn.sm { padding: 6px 11px; font-size: 13px; border-radius: 8px; }
.btn.lg { padding: 12px 22px; font-size: 15px; border-radius: 12px; }

/* inputs */
input[type=text], input[type=email], input[type=password], textarea, select { width: 100%; padding: 9px 12px; border: 1px solid var(--line-2); border-radius: 10px; background: #fff; transition: border-color .15s, box-shadow .15s; }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(79,70,229,.15); }
label.lbl { display: block; font-size: 11.5px; color: var(--muted); margin: 12px 0 5px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; }
.check { display: flex; align-items: flex-start; gap: 10px; margin: 10px 0; }
.check input { margin-top: 2px; width: 17px; height: 17px; accent-color: var(--accent); flex-shrink: 0; }

/* layout */
.topbar { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 14px; padding: 12px 22px; background: rgba(255,255,255,.85); backdrop-filter: saturate(180%) blur(12px); border-bottom: 1px solid var(--line); }
.topbar h1 { font-size: 15px; font-weight: 600; margin: 0; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 700; color: var(--ink); letter-spacing: -.02em; }
.brand .mark { width: 28px; height: 28px; border-radius: 8px; background: linear-gradient(135deg, var(--accent-2), #7c3aed); color: #fff; display: inline-flex; align-items: center; justify-content: center; box-shadow: 0 2px 6px rgba(79,70,229,.35); }
.brand .mark svg { width: 15px; height: 15px; }
.brand small { display: block; font-size: 11px; font-weight: 500; color: var(--muted); letter-spacing: 0; margin-top: -2px; }
.container { max-width: 1080px; margin: 0 auto; padding: 28px 22px 60px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); padding: 20px; }
.muted { color: var(--muted); }
.row { display: flex; align-items: center; gap: 10px; }
.grow { flex: 1; }

/* pills */
.pill { display: inline-flex; align-items: center; gap: 5px; padding: 2px 9px; border-radius: 999px; font-size: 11.5px; font-weight: 600; letter-spacing: .01em; background: #eef0f6; color: var(--ink-2); text-transform: capitalize; }
.pill::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; opacity: .7; }
.pill.draft, .pill.pending { background: #f1f5f9; color: #475569; }
.pill.sent, .pill.viewed { background: var(--warn-soft); color: #b45309; }
.pill.completed, .pill.signed { background: var(--ok-soft); color: #047857; }
.pill.voided { background: var(--danger-soft); color: #be123c; }
.avatar { width: 26px; height: 26px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 700; color: #fff; flex-shrink: 0; }

/* toast */
.toast { position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%) translateY(8px); background: var(--ink); color: #fff; padding: 11px 18px; border-radius: 12px; box-shadow: var(--shadow-lg); z-index: 100; opacity: 0; transition: opacity .2s, transform .2s; pointer-events: none; font-weight: 500; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.err { background: var(--danger); }

/* PDF viewer */
.pages { padding: 24px; display: flex; flex-direction: column; align-items: center; gap: 22px; }
.page { position: relative; background: #fff; border-radius: 4px; box-shadow: 0 0 0 1px rgba(15,23,42,.06), 0 12px 32px -8px rgba(15,23,42,.18); }
.page canvas { display: block; border-radius: 4px; }
.page .overlay { position: absolute; inset: 0; }
.field { position: absolute; border: 1.5px solid var(--fc, var(--accent)); background: color-mix(in srgb, var(--fc, var(--accent)) 10%, #fff 40%); border-radius: 4px; display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 600; color: var(--fc, var(--accent)); overflow: visible; user-select: none; }
.field > span:first-child { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; padding: 0 4px; }
.field img { max-width: 100%; max-height: 100%; object-fit: contain; }
.field .txt { width: 100%; padding: 0 3px; color: #000; font-weight: 400; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; text-align: left; font-family: Helvetica, Arial, sans-serif; }

/* modal */
.modal-bg { position: fixed; inset: 0; background: rgba(15,23,42,.5); backdrop-filter: blur(3px); display: none; align-items: center; justify-content: center; z-index: 50; padding: 16px; }
.modal-bg.show { display: flex; animation: fade .15s ease-out; }
.modal { background: #fff; border-radius: 18px; box-shadow: var(--shadow-lg); width: 100%; max-width: 640px; padding: 24px; animation: pop .18s ease-out; }
.modal h2 { margin: 0 0 4px; font-size: 19px; font-weight: 700; }
@keyframes fade { from { opacity: 0 } to { opacity: 1 } }
@keyframes pop { from { transform: translateY(8px) scale(.98); opacity: 0 } to { transform: none; opacity: 1 } }

/* signature pad */
.pad-wrap { position: relative; border: 1.5px dashed var(--line-2); border-radius: 14px; background: linear-gradient(180deg, #fff, #fafbff); margin: 14px 0 10px; overflow: hidden; }
.pad-wrap.inked { border-style: solid; border-color: var(--accent); }
.pad-wrap canvas { display: block; width: 100%; height: 230px; touch-action: none; cursor: crosshair; }
.pad-wrap .baseline { position: absolute; left: 28px; right: 28px; bottom: 48px; border-top: 1px solid #cbd5e1; pointer-events: none; }
.pad-wrap .x { position: absolute; left: 12px; bottom: 40px; color: #94a3b8; font-size: 20px; pointer-events: none; }
.pad-wrap .hint { position: absolute; left: 0; right: 0; bottom: 14px; text-align: center; color: #94a3b8; font-size: 13px; pointer-events: none; display: flex; align-items: center; justify-content: center; gap: 6px; }
.note { font-size: 12.5px; color: var(--muted); display: flex; gap: 6px; align-items: flex-start; }

@media (max-width: 720px) { .pages { padding: 10px; gap: 12px; } .container { padding: 16px 14px 40px; } .topbar { padding: 10px 14px; } .modal { padding: 18px; } }