/* ═══════════════════════════════════════════
   SIGN PDF — FUTURISTIC GLASS UI
   ═══════════════════════════════════════════ */

/* ── Status Strip ── */
.snp-status-strip { }
.snp-error-bar,
.snp-processing-bar,
.snp-success-bar {
  display: none;
  align-items: center;
  gap: 0.65rem;
  padding: 0.75rem 1.1rem;
  border-radius: var(--t-radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.snp-error-bar.show,
.snp-processing-bar.show,
.snp-success-bar.show {
  display: flex;
  margin-bottom: 1rem;
  animation: snpSlideIn 0.3s cubic-bezier(0.16,1,0.3,1);
}
@keyframes snpSlideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}
.snp-bar-icon {
  flex-shrink: 0;
  font-size: 1.15rem;
  line-height: 1;
}
.snp-bar-dismiss {
  margin-left: auto;
  width: 26px; height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 50%;
  background: rgba(0,0,0,0.08);
  color: inherit;
  font-size: 0.7rem;
  cursor: pointer;
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity 0.2s, background 0.2s;
}
.snp-bar-dismiss:hover { opacity: 1; background: rgba(0,0,0,0.14); }
.snp-error-bar {
  background: var(--t-red-light);
  border: 1px solid rgba(239,68,68,0.2);
  color: var(--t-red);
}
.snp-processing-bar {
  background: var(--t-accent-light);
  border: 1px solid rgba(255,107,74,0.15);
  color: var(--text);
}
.snp-success-bar {
  background: var(--t-green-light);
  border: 1px solid rgba(16,185,129,0.2);
  color: var(--t-green);
}

/* ── Spinner ── */
.snp-spinner {
  width: 22px; height: 22px;
  border: 2.5px solid var(--t-border);
  border-top-color: var(--t-accent);
  border-right-color: var(--t-accent);
  border-radius: 50%;
  animation: snpSpin 0.7s linear infinite;
  flex-shrink: 0;
}
@keyframes snpSpin { to { transform: rotate(360deg); } }

/* ═══════════════════════════════════════════
   WORKSPACE — single-column → 2-col on file
   ═══════════════════════════════════════════ */
.snp-workspace {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
  align-items: start;
  transition: grid-template-columns 0.4s cubic-bezier(0.16,1,0.3,1);
}
.snp-workspace.split-mode {
  grid-template-columns: 1fr 1fr;
}
@media (max-width: 768px) {
  .snp-workspace { grid-template-columns: 1fr; gap: 1rem; }
}

/* ── LEFT: Upload Column ── */
.snp-upload-col {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ── Dropzone ── */
.snp-dropzone {
  position: relative;
  border: 2px dashed var(--t-border);
  border-radius: var(--t-radius);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.16,1,0.3,1);
  background: var(--t-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  outline: none;
  overflow: hidden;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 260px;
}
.snp-dropzone::before {
  content: '';
  position: absolute;
  inset: -50%;
  background: radial-gradient(circle at 50% 50%, var(--t-accent-light) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.5s;
  pointer-events: none;
}
.snp-dropzone:hover,
.snp-dropzone:focus-visible {
  border-color: var(--t-accent);
  background: var(--t-accent-light);
  box-shadow: 0 0 0 3px var(--t-accent-glow), 0 8px 32px rgba(0,0,0,0.04);
}
.snp-dropzone:hover::before,
.snp-dropzone:focus-visible::before { opacity: 1; }
.snp-dropzone.dragover {
  border-color: var(--t-accent);
  background: var(--t-accent-light);
  box-shadow: 0 0 0 4px var(--t-accent-glow), 0 12px 48px rgba(255,107,74,0.12);
  transform: scale(1.015);
}
.snp-dropzone.dragover .snp-drop-ring {
  animation: snpRingPulse 0.8s ease-out infinite;
}
.snp-dropzone.has-file {
  border-style: solid;
  border-color: var(--t-green);
  background: var(--t-green-light);
  box-shadow: 0 0 0 3px var(--t-green-glow);
  padding: 1.5rem;
  min-height: auto;
}
.snp-dropzone-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  position: relative;
  z-index: 1;
}
.snp-drop-icon-wrap {
  position: relative;
  width: 80px; height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.5rem;
}
.snp-drop-icon {
  font-size: 3rem;
  line-height: 1;
  position: relative;
  z-index: 1;
  transition: transform 0.3s cubic-bezier(0.16,1,0.3,1);
}
.snp-dropzone:hover .snp-drop-icon,
.snp-dropzone.dragover .snp-drop-icon { transform: translateY(-4px); }
.snp-drop-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid transparent;
  border-top-color: var(--t-accent);
  border-right-color: var(--t-accent);
  opacity: 0;
  transition: opacity 0.35s;
}
.snp-dropzone:hover .snp-drop-ring,
.snp-dropzone:focus-visible .snp-drop-ring { opacity: 0.6; }
.snp-dropzone.dragover .snp-drop-ring {
  opacity: 1;
  border-top-color: var(--t-green);
  border-right-color: var(--t-green);
}
@keyframes snpRingPulse {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(1.45); opacity: 0; }
}
.snp-drop-title {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  margin: 0;
}
.snp-drop-sub {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin: 0;
}
.snp-file-hidden {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

/* ── File Badge ── */
.snp-file-badge {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--t-bg);
  border: 1px solid var(--t-border-glass);
  border-radius: var(--t-radius);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: border-color 0.3s, box-shadow 0.3s;
  animation: snpSlideIn 0.3s cubic-bezier(0.16,1,0.3,1);
}
.snp-file-badge:hover {
  border-color: var(--t-accent);
  box-shadow: 0 4px 20px var(--t-accent-glow);
}
.snp-file-badge-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}
.snp-file-badge-icon {
  font-size: 1.6rem;
  flex-shrink: 0;
  line-height: 1;
}
.snp-file-badge-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.snp-file-badge-name {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.snp-file-badge-meta {
  font-size: 0.72rem;
  color: var(--text-tertiary);
  font-family: var(--t-mono);
}
.snp-file-badge-clear {
  width: 34px; height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 50%;
  background: transparent;
  color: var(--text-tertiary);
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
}
.snp-file-badge-clear:hover {
  border-color: var(--t-red);
  color: var(--t-red);
  background: var(--t-red-light);
  box-shadow: 0 2px 8px rgba(239,68,68,0.15);
}

/* ── Config Column ── */
.snp-config-col {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding: 1.5rem;
  background: var(--t-bg);
  border: 1px solid var(--t-border-glass);
  border-radius: var(--t-radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: snpSlideIn 0.35s cubic-bezier(0.16,1,0.3,1);
}

/* ── Input Group ── */
.snp-input-group { margin-bottom: 0.25rem; }
.snp-input-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  margin-bottom: 0.4rem;
}
.snp-input {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1.5px solid var(--t-border);
  border-radius: var(--t-radius-sm);
  background: var(--bg, #fff);
  color: var(--text);
  font-family: var(--t-font);
  font-size: 0.9rem;
  outline: none;
  transition: all 0.25s;
  cursor: pointer;
}
.snp-input:focus {
  border-color: var(--t-accent);
  box-shadow: 0 0 0 3px var(--t-accent-glow);
}
select.snp-input {
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%23666'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  padding-right: 2rem;
}

/* ── Action Buttons ── */
.snp-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.6rem;
  border: 1.5px solid var(--t-border);
  border-radius: 100px;
  background: var(--t-bg);
  color: var(--text-secondary);
  font-family: var(--t-font);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16,1,0.3,1);
  white-space: nowrap;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.snp-action-btn:hover:not(:disabled) {
  border-color: var(--t-accent);
  color: var(--t-accent);
  background: var(--t-accent-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 18px var(--t-accent-glow);
}
.snp-action-btn:active:not(:disabled) { transform: translateY(0); }
.snp-action-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.snp-action-btn.primary {
  width: 100%;
  background: linear-gradient(135deg, var(--t-accent), var(--t-accent-2));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 24px var(--t-accent-glow);
  font-size: 0.95rem;
  padding: 0.85rem 1.5rem;
}
.snp-action-btn.primary:hover:not(:disabled) {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--t-accent-glow);
}
.snp-action-btn.primary:active:not(:disabled) { transform: translateY(0); }
.snp-action-btn.download-all {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 24px rgba(16,185,129,0.3);
}
.snp-action-btn.download-all:hover:not(:disabled) {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(16,185,129,0.4);
}

/* ═══════════════════════════════════════════
   SIGNATURE CANVAS (RIGHT COLUMN)
   ═══════════════════════════════════════════ */
.snp-sig-col {
  display: flex;
  flex-direction: column;
}
.snp-sig-card {
  padding: 1.5rem;
  background: var(--t-bg);
  border: 1px solid var(--t-border-glass);
  border-radius: var(--t-radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: snpSlideIn 0.35s cubic-bezier(0.16,1,0.3,1);
}
.snp-sig-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.snp-sig-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
}
.snp-sig-status {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-tertiary);
  padding: 0.25rem 0.7rem;
  border-radius: 100px;
  background: var(--t-border);
}
.snp-sig-status.ready {
  color: var(--t-green);
  background: var(--t-green-light);
}
.snp-sig-canvas {
  width: 100%;
  height: auto;
  border: 1.5px solid var(--t-border);
  border-radius: var(--t-radius-sm);
  background: #fff;
  cursor: crosshair;
  touch-action: none;
  display: block;
  margin-bottom: 0.85rem;
}
.snp-sig-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* ── Toast ── */
.snp-toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(1rem);
  padding: 0.75rem 1.5rem;
  border-radius: 100px;
  font-family: var(--t-font);
  font-size: 0.85rem;
  font-weight: 600;
  z-index: 9999;
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.16,1,0.3,1);
  pointer-events: none;
  white-space: nowrap;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: var(--t-accent);
  color: #fff;
}
.snp-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.snp-toast.error {
  background: var(--t-red);
  box-shadow: 0 8px 32px rgba(239,68,68,0.3);
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .snp-workspace.split-mode { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .snp-config-col { padding: 1.2rem; }
  .snp-dropzone { padding: 2.5rem 1.5rem; }
  .snp-sig-card { padding: 1.2rem; }
}
@media (max-width: 768px) {
  .snp-workspace,
  .snp-workspace.split-mode { grid-template-columns: 1fr; gap: 1rem; }
  .snp-dropzone { padding: 2rem 1rem; min-height: 200px; }
  .snp-drop-icon { font-size: 2.2rem; }
  .snp-drop-icon-wrap { width: 60px; height: 60px; }
  .snp-drop-title { font-size: 1rem; }
  .snp-drop-sub { font-size: 0.78rem; }
  .snp-config-col { padding: 1.2rem 1rem; gap: 0.75rem; }
  .snp-input { font-size: 0.82rem; padding: 0.55rem 0.7rem; }
  .snp-action-btn { padding: 0.65rem 1.2rem; font-size: 0.8rem; }
  .snp-action-btn.primary { padding: 0.75rem 1.2rem; font-size: 0.88rem; }
  .snp-action-btn.download-all { padding: 0.65rem 1.4rem; font-size: 0.8rem; }
  .snp-sig-card { padding: 1rem 0.85rem; }
  .snp-sig-title { font-size: 0.88rem; }
  .snp-file-badge { padding: 0.6rem 0.8rem; }
  .snp-file-badge-icon { font-size: 1.3rem; }
  .snp-file-badge-name { font-size: 0.78rem; }
  .snp-file-badge-meta { font-size: 0.67rem; }
  .snp-file-badge-clear { width: 30px; height: 30px; font-size: 0.9rem; }
  .snp-error-bar,
  .snp-processing-bar,
  .snp-success-bar { font-size: 0.78rem; padding: 0.6rem 0.9rem; flex-wrap: wrap; }
  .snp-bar-dismiss { width: 24px; height: 24px; font-size: 0.65rem; }
  .snp-spinner { width: 18px; height: 18px; }
}
@media (max-width: 480px) {
  .snp-dropzone { padding: 1.5rem 1rem; min-height: 180px; }
  .snp-drop-icon { font-size: 1.8rem; }
  .snp-drop-icon-wrap { width: 48px; height: 48px; }
  .snp-drop-title { font-size: 0.88rem; }
  .snp-drop-sub { font-size: 0.72rem; }
  .snp-config-col { padding: 1rem 0.85rem; gap: 0.65rem; }
  .snp-input { font-size: 0.78rem; padding: 0.5rem 0.65rem; }
  .snp-action-btn { padding: 0.6rem 1rem; font-size: 0.76rem; }
  .snp-action-btn.primary { padding: 0.7rem 1rem; font-size: 0.82rem; }
  .snp-action-btn.download-all { padding: 0.6rem 1.2rem; font-size: 0.78rem; }
  .snp-toast { bottom: 5rem; font-size: 0.72rem; padding: 0.5rem 1rem; max-width: 85%; white-space: normal; text-align: center; }
  .snp-sig-card { padding: 0.85rem 0.7rem; }
  .snp-sig-title { font-size: 0.82rem; }
  .snp-sig-actions { flex-direction: column; }
  .snp-sig-actions .snp-action-btn { width: 100%; }
  .snp-file-badge { padding: 0.55rem 0.7rem; }
  .snp-file-badge-icon { font-size: 1.1rem; }
  .snp-file-badge-name { font-size: 0.74rem; }
  .snp-file-badge-meta { font-size: 0.63rem; }
  .snp-file-badge-clear { width: 28px; height: 28px; font-size: 0.8rem; }
  .snp-error-bar,
  .snp-processing-bar,
  .snp-success-bar { font-size: 0.74rem; padding: 0.5rem 0.75rem; gap: 0.45rem; }
  .snp-bar-icon { font-size: 1rem; }
  .snp-bar-dismiss { width: 22px; height: 22px; font-size: 0.6rem; }
  .snp-spinner { width: 16px; height: 16px; }
}