:root {
  --accent:      #3b82f6;
  --accent-dim:  rgba(59, 130, 246, 0.18);
  --accent-glow: rgba(59, 130, 246, 0.30);
  --bg:          #0c1220;
  --surface:     #111827;
  --panel:       rgba(17, 24, 39, 0.88);
  --border:      rgba(255, 255, 255, 0.09);
  --text:        #e2e8f0;
  --muted:       #64748b;
  --success:     #22c55e;
  --warning:     #f59e0b;
  --danger:      #ef4444;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: radial-gradient(ellipse 120% 60% at 70% -10%, rgba(59,130,246,0.14), transparent 65%),
              radial-gradient(ellipse 80% 50% at 10% 110%,  rgba(99,102,241,0.10), transparent 60%),
              linear-gradient(160deg, #0d1525 0%, #0c1220 100%);
  color: var(--text);
  font-family: "Segoe UI", ui-sans-serif, system-ui, sans-serif;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

/* ── layout ────────────────────────────────────────────────────────────── */

.app-shell {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 16px;
  height: 100%;
  padding: 16px;
}

.left-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
}

/* ── brand ─────────────────────────────────────────────────────────────── */

.brand-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 2px;
}

.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
  flex-shrink: 0;
  animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.55; transform: scale(0.85); }
}

.brand-name {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand-sub {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 1px;
}

/* ── drop zone ─────────────────────────────────────────────────────────── */

.drop-zone {
  border: 2px dashed rgba(255,255,255,0.15);
  border-radius: 12px;
  background: rgba(255,255,255,0.03);
  padding: 22px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  position: relative;
}

.drop-zone input[type="file"] { display: none; }

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-dim);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.drop-icon {
  font-size: 1.4rem;
  color: var(--muted);
  margin-bottom: 6px;
  transition: color 0.2s;
}

.drop-zone:hover .drop-icon,
.drop-zone.drag-over .drop-icon { color: var(--accent); }

.drop-label {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.4;
  transition: color 0.2s;
}

.drop-zone:hover .drop-label,
.drop-zone.drag-over .drop-label { color: var(--text); }

/* ── panel (inputs wrapper) ────────────────────────────────────────────── */

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  backdrop-filter: blur(6px);
}

/* ── rate grid ─────────────────────────────────────────────────────────── */

.rate-grid {
  display: grid;
  gap: 9px;
}

.rate-grid label {
  display: grid;
  gap: 4px;
}

.label-text {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.rate-grid input[type="number"],
.rate-grid select {
  width: 100%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  color: var(--text);
  padding: 7px 10px;
  font-size: 0.88rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.rate-grid input[type="number"]:focus,
.rate-grid select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.rate-grid select option { background: #111827; }

/* ── toggle row ────────────────────────────────────────────────────────── */

.toggle-row {
  display: grid !important;
  grid-template-columns: auto 1fr !important;
  gap: 10px;
  align-items: start;
  border: 1px solid rgba(59,130,246,0.25) !important;
  border-radius: 10px;
  background: rgba(59,130,246,0.07) !important;
  padding: 9px 10px;
  cursor: pointer;
  margin-top: 2px;
}

.toggle-row input[type="checkbox"] {
  accent-color: var(--accent);
  width: 14px;
  height: 14px;
  margin-top: 2px;
  cursor: pointer;
}

.toggle-row strong { font-size: 0.83rem; display: block; }
.toggle-row small  { font-size: 0.75rem; color: var(--muted); display: block; margin-top: 1px; line-height: 1.35; }

/* ── buttons ───────────────────────────────────────────────────────────── */

.btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.btn-row.single {
  grid-template-columns: 1fr;
}

.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  border: none;
  border-radius: 9px;
  padding: 9px 12px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: filter 0.15s, transform 0.1s, opacity 0.15s;
}

.btn:hover:not(:disabled)  { filter: brightness(1.12); transform: translateY(-1px); }
.btn:active:not(:disabled) { transform: translateY(0); }
.btn:disabled              { opacity: 0.38; cursor: not-allowed; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-ghost   {
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-link {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0;
  transition: color 0.12s;
}
.btn-link:hover { color: var(--text); }

/* ── results ───────────────────────────────────────────────────────────── */

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.result-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 10px;
  backdrop-filter: blur(6px);
}

.result-card-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
  margin-bottom: 6px;
}

.result-card-value {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--accent);
  margin-bottom: 4px;
}

.result-card-sub {
  font-size: 0.75rem;
  color: var(--muted);
}

.conf-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 2px 4px;
}

.conf-badge {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid currentColor;
}

.conf-actions {
  display: flex;
  gap: 12px;
}

/* ── details ───────────────────────────────────────────────────────────── */

.detail-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  margin-top: 4px;
}

.detail-table td {
  padding: 5px 4px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.detail-table td:first-child { color: var(--muted); width: 48%; }
.detail-table td:last-child  { text-align: right; }

.mono-sm {
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.75rem;
  color: var(--muted);
}

/* ── warnings ──────────────────────────────────────────────────────────── */

.warn-box {
  margin-top: 8px;
  border: 1px solid rgba(239,68,68,0.3);
  border-radius: 8px;
  background: rgba(239,68,68,0.07);
  padding: 6px 9px;
}

.warn-row {
  font-size: 0.78rem;
  color: var(--danger);
  padding: 2px 0;
  line-height: 1.4;
}

/* ── status ────────────────────────────────────────────────────────────── */

.status-text {
  font-size: 0.78rem;
  color: var(--muted);
  text-align: center;
  padding: 2px 4px;
}

/* ── viewer ────────────────────────────────────────────────────────────── */

.viewer-panel {
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  background: #09111d;
  display: flex;
  flex-direction: column;
}

.viewer-header {
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 9px 14px;
  background: rgba(12, 18, 32, 0.85);
  flex-shrink: 0;
}

#viewerContainer {
  flex: 1;
  min-height: 300px;
}

/* ── utilities ─────────────────────────────────────────────────────────── */

.hidden { display: none !important; }

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.18); }

/* ── responsive ────────────────────────────────────────────────────────── */

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    height: auto;
    min-height: 100%;
  }
  .viewer-panel { min-height: 55vw; }
}