/* ============================================
   PDF Tools — Corporate Theme
   ============================================ */

:root {
  --blue: #3B82F6;
  --blue-light: #DBEAFE;
  --blue-dark: #2563EB;
  --pink: #EC4899;
  --pink-light: #FCE7F3;
  --pink-dark: #DB2777;
  --gradient: linear-gradient(135deg, #3B82F6, #EC4899);

  --bg: #F8FAFC;
  --surface: #FFFFFF;
  --text: #0F172A;
  --text-2: #475569;
  --text-3: #94A3B8;
  --border: #E2E8F0;
  --border-light: #F1F5F9;

  --shadow-xs: 0 1px 2px rgba(0,0,0,.04);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.08), 0 2px 4px -2px rgba(0,0,0,.05);
  --shadow-lg: 0 10px 20px -4px rgba(0,0,0,.1), 0 4px 8px -4px rgba(0,0,0,.06);

  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --ease: cubic-bezier(.4,0,.2,1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font: inherit; }
img { display: block; max-width: 100%; }

/* ---------- Layout ---------- */
#app { display: flex; flex-direction: column; min-height: 100vh; }
#main { flex: 1; max-width: 960px; width: 100%; margin: 0 auto; padding: 2rem 1.5rem 4rem; }

/* ---------- Footer ---------- */
.site-footer {
  text-align: center;
  padding: 1.25rem 1rem;
  font-size: .78rem;
  color: var(--text-3);
  border-top: 1px solid var(--border);
}
.site-footer a {
  color: var(--text-2);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color .15s;
}
.site-footer a:hover { color: var(--blue); }
.footer-sep { margin: 0 .35rem; }

/* ---------- Header ---------- */
#header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(255,255,255,.88);
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -.01em;
  color: var(--text);
  flex-shrink: 0;
}

.logo-icon { width: 28px; height: 28px; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: .35rem;
  font-size: .875rem;
  color: var(--text-3);
}
.breadcrumb a { color: var(--text-3); transition: color .15s; }
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb svg { width: 14px; height: 14px; }
.breadcrumb-current { color: var(--text); font-weight: 500; }

.header-tagline {
  margin-left: auto;
  font-size: .75rem;
  color: var(--text-3);
  letter-spacing: .01em;
}

/* ---------- Hero ---------- */
.hero {
  text-align: center;
  padding: 2.5rem 0 2rem;
}
.hero h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -.025em;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  color: var(--text-2);
  margin-top: .5rem;
  font-size: 1.05rem;
}

/* ---------- Tool Grid ---------- */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.25rem 1.5rem;
  text-align: center;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
  position: relative;
}

.tool-card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  padding: 1.5px;
  background: var(--gradient);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity .25s var(--ease);
  pointer-events: none;
}

.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.tool-card:hover::after { opacity: 1; }
.tool-card:active { transform: translateY(-1px); }

.tool-card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto .85rem;
}
.tool-card-icon svg { width: 24px; height: 24px; }

.tool-card[data-accent="blue"] .tool-card-icon { background: var(--blue-light); color: var(--blue); }
.tool-card[data-accent="pink"] .tool-card-icon { background: var(--pink-light); color: var(--pink); }

.tool-card h3 {
  font-size: .925rem;
  font-weight: 600;
  margin-bottom: .25rem;
}
.tool-card p {
  font-size: .8rem;
  color: var(--text-3);
  line-height: 1.4;
}

/* ---------- Tool View ---------- */
.tool-view {
  animation: fadeUp .3s var(--ease);
}

.tool-head { margin-bottom: 1.5rem; }
.tool-head h2 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -.02em;
}
.tool-head p { color: var(--text-2); margin-top: .25rem; font-size: .95rem; }

.tool-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

/* ---------- Drop Zone ---------- */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  background: var(--surface);
}
.drop-zone:hover { border-color: var(--blue); background: var(--blue-light); }
.drop-zone.drag-over { border-color: var(--pink); background: var(--pink-light); animation: pulse-border .8s infinite; }

.drop-zone-icon { color: var(--text-3); margin-bottom: .5rem; }
.drop-zone-icon svg { width: 36px; height: 36px; margin: 0 auto; }
.drop-zone-label { font-weight: 500; color: var(--text-2); }
.drop-zone-hint { font-size: .8rem; color: var(--text-3); margin-top: .25rem; }
.drop-zone input[type="file"] { display: none; }

/* ---------- File List ---------- */
.file-list { margin-top: 1rem; display: flex; flex-direction: column; gap: .5rem; }

.file-item {
  display: flex;
  align-items: center;
  gap: .65rem;
  padding: .65rem .85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .875rem;
  transition: box-shadow .15s, border-color .15s;
}
.file-item:hover { box-shadow: var(--shadow-xs); }
.file-item.dragging { opacity: .4; }
.file-item.drag-target { border-color: var(--blue); box-shadow: 0 0 0 2px var(--blue-light); }

.file-grip { color: var(--text-3); cursor: grab; display: flex; touch-action: none; }
.file-grip svg { width: 16px; height: 16px; }
.file-icon { color: var(--blue); display: flex; }
.file-icon svg { width: 18px; height: 18px; }
.file-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 500; }
.file-size { color: var(--text-3); font-size: .8rem; flex-shrink: 0; }
.file-reorder {
  display: flex;
  flex-direction: column;
  gap: 1px;
  flex-shrink: 0;
}
.file-move {
  color: var(--text-3);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  width: 22px;
  height: 16px;
  border-radius: 3px;
  transition: color .15s, background .15s;
}
.file-move:hover:not(:disabled) { color: var(--blue); background: var(--blue-light); }
.file-move:disabled { opacity: .25; cursor: default; }
.file-move svg { width: 14px; height: 14px; }

.file-remove {
  color: var(--text-3);
  display: flex;
  padding: 2px;
  border-radius: 4px;
  transition: color .15s, background .15s;
}
.file-remove:hover { color: #EF4444; background: #FEF2F2; }
.file-remove svg { width: 16px; height: 16px; }

.file-item-ghost {
  position: fixed;
  z-index: 1000;
  opacity: .85;
  pointer-events: none;
  box-shadow: var(--shadow-lg);
  background: var(--surface);
  border: 1px solid var(--blue);
  border-radius: var(--radius);
}

/* ---------- Form Elements ---------- */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: .875rem; font-weight: 500; margin-bottom: .35rem; color: var(--text-2); }

.input {
  width: 100%;
  padding: .55rem .75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-size: .9rem;
  color: var(--text);
  transition: border-color .15s, box-shadow .15s;
  outline: none;
}
.input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-light); }

.select-wrap { position: relative; }
.select-wrap select { appearance: none; padding-right: 2rem; }
.select-wrap::after {
  content: '';
  position: absolute;
  right: .75rem;
  top: 50%;
  transform: translateY(-50%);
  border: 4px solid transparent;
  border-top-color: var(--text-3);
  pointer-events: none;
}

.inline-fields { display: flex; gap: .75rem; flex-wrap: wrap; align-items: end; }
.inline-fields .form-group { flex: 1; min-width: 140px; margin-bottom: 0; }

.info-panel {
  background: var(--border-light);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-top: 1rem;
  font-size: .9rem;
}
.info-row {
  display: flex;
  justify-content: space-between;
  padding: .25rem 0;
}
.info-row span:first-child { color: var(--text-2); }
.info-row span:last-child { font-weight: 500; }
.info-hint { color: var(--text-2); font-size: .85rem; margin-top: .5rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  padding: .55rem 1.25rem;
  border-radius: var(--radius);
  font-weight: 500;
  font-size: .9rem;
  transition: all .15s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .45; pointer-events: none; }

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { box-shadow: var(--shadow-md); filter: brightness(1.05); }

.btn-secondary {
  background: var(--blue-light);
  color: var(--blue-dark);
}
.btn-secondary:hover { background: #BFDBFE; }

.btn-ghost {
  background: transparent;
  color: var(--text-2);
}
.btn-ghost:hover { background: var(--border-light); }

.btn-outline {
  border: 1px solid var(--border);
  color: var(--text-2);
  background: var(--surface);
}
.btn-outline:hover { border-color: var(--blue); color: var(--blue); }

.btn-lg { padding: .7rem 1.75rem; font-size: .95rem; }

.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  color: var(--text-2);
  transition: background .15s, color .15s;
}
.btn-icon:hover { background: var(--border-light); color: var(--text); }
.btn-icon:disabled { opacity: .35; pointer-events: none; }
.btn-icon svg { width: 20px; height: 20px; }

/* ---------- Output selector ---------- */
.output-sel {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .85rem;
  color: var(--text-3);
}

/* ---------- Output name ---------- */
.output-name {
  background: var(--border-light);
  border-radius: var(--radius);
  padding: .75rem 1rem;
  display: flex;
  align-items: center;
  gap: .75rem;
}
.output-name label {
  display: flex;
  align-items: center;
  gap: .35rem;
  font-size: .85rem;
  font-weight: 500;
  color: var(--text-2);
  white-space: nowrap;
  cursor: default;
}
.output-name label svg { width: 16px; height: 16px; }
.output-name .input {
  flex: 1;
  font-size: .875rem;
  padding: .45rem .65rem;
}

/* ---------- Overlay / Modal ---------- */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15,23,42,.35);
  backdrop-filter: blur(4px);
  animation: fadeIn .2s var(--ease);
}

.overlay-box {
  text-align: center;
  background: var(--surface);
  border-radius: var(--radius-xl);
  padding: 2.5rem 3rem;
  box-shadow: var(--shadow-lg);
}

.modal {
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 92%;
  max-width: 620px;
  animation: scaleIn .25s var(--ease);
  overflow: hidden;
}
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.modal-head h3 { font-size: 1rem; font-weight: 600; }
.modal-foot {
  display: flex;
  justify-content: flex-end;
  gap: .5rem;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
}

/* Signature pad */
.sig-pad-wrap { padding: 1.25rem; }
.sig-pad-wrap canvas {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: crosshair;
  touch-action: none;
  display: block;
}
.sig-hint { font-size: .8rem; color: var(--text-3); margin-top: .5rem; text-align: center; }

/* ---------- Spinner ---------- */
.spinner {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--blue);
  border-right-color: var(--pink);
  animation: spin .7s linear infinite;
  margin: 0 auto 1rem;
}

/* ---------- Toast ---------- */
#toast-container {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  align-items: center;
  pointer-events: none;
}
.toast {
  padding: .65rem 1.25rem;
  border-radius: var(--radius);
  font-size: .875rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  transform: translateY(16px);
  opacity: 0;
  transition: transform .25s var(--ease), opacity .25s var(--ease);
  pointer-events: auto;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { background: #059669; color: #fff; }
.toast.error { background: #DC2626; color: #fff; }
.toast.info { background: var(--text); color: #fff; }

/* ---------- Sign Workspace ---------- */
.sign-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.page-nav {
  display: flex;
  align-items: center;
  gap: .35rem;
  font-size: .875rem;
  font-weight: 500;
  color: var(--text-2);
}

.pdf-preview-wrap {
  position: relative;
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: visible;
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.pdf-preview-wrap canvas { display: block; max-width: 100%; height: auto; border-radius: var(--radius); }

.sig-overlay {
  position: absolute;
  cursor: move;
  border: 2px dashed var(--blue);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  touch-action: none;
  background: rgba(59,130,246,.04);
}
.sig-overlay img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
}
.sig-overlay .resize-h {
  position: absolute;
  bottom: -8px;
  right: -8px;
  width: 18px;
  height: 18px;
  background: var(--blue);
  border: 2px solid #fff;
  border-radius: 50%;
  cursor: nwse-resize;
  box-shadow: var(--shadow-xs);
}

/* ---------- Draw Rectangle (temporary) ---------- */
.draw-rect {
  position: absolute;
  border: 2px dashed var(--blue);
  background: rgba(59,130,246,.06);
  pointer-events: none;
  border-radius: 3px;
}

/* ---------- Text Overlay ---------- */
.text-overlay {
  position: absolute;
  border: 1.5px dashed rgba(59,130,246,.55);
  border-radius: 3px;
  background: transparent;
  display: flex;
  flex-direction: column;
  touch-action: auto;
}

.text-ov-grip {
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(59,130,246,.45);
  cursor: move;
  touch-action: none;
  flex-shrink: 0;
  border-bottom: 1px solid rgba(59,130,246,.2);
}
.text-ov-grip svg { width: 14px; height: 14px; pointer-events: none; }

.text-ov-input {
  display: block;
  flex: 1;
  min-height: 0;
  width: 100%;
  border: none;
  outline: none;
  background: transparent;
  resize: none;
  padding: 2px 4px;
  font-family: Helvetica, Arial, sans-serif;
  overflow: hidden;
  cursor: text;
  touch-action: auto;
  user-select: text;
}

.text-ov-del {
  position: absolute;
  top: -9px;
  right: -9px;
  width: 20px;
  height: 20px;
  background: #EF4444;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  z-index: 2;
}
.text-ov-del svg { width: 12px; height: 12px; }

.text-overlay .resize-h {
  position: absolute;
  bottom: -8px;
  right: -8px;
  width: 16px;
  height: 16px;
  background: var(--blue);
  border: 2px solid #fff;
  border-radius: 50%;
  cursor: nwse-resize;
  box-shadow: var(--shadow-xs);
  z-index: 2;
  touch-action: none;
}

@media (pointer: coarse) {
  .text-ov-grip { height: 28px; }
  .text-ov-del { width: 28px; height: 28px; top: -14px; right: -14px; }
  .text-ov-del svg { width: 14px; height: 14px; }
  .text-overlay .resize-h { width: 28px; height: 28px; bottom: -14px; right: -14px; }
}

/* ---------- Textbox Toolbar Controls ---------- */
.tb-controls {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
}

.form-group-inline {
  display: flex;
  align-items: center;
  gap: .35rem;
}
.form-group-inline label {
  font-size: .8rem;
  font-weight: 500;
  color: var(--text-2);
  white-space: nowrap;
}

.input-sm {
  width: 64px;
  padding: .35rem .5rem;
  font-size: .85rem;
}

.input-color {
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2px;
  cursor: pointer;
  background: var(--surface);
}

@media (pointer: coarse) {
  .sig-overlay .resize-h,
  .text-overlay .resize-h {
    width: 28px;
    height: 28px;
    bottom: -14px;
    right: -14px;
  }
}

/* ---------- Color Picker ---------- */
.picker-wrap {
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.picker-wrap canvas { display: block; max-width: 100%; height: auto; cursor: crosshair; }
.picker-wrap canvas.pick-locked { cursor: pointer; }

.picker-info {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-wrap: wrap;
}

.pick-swatch {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  background: var(--border-light);
  flex-shrink: 0;
}
.pick-hex {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  min-width: 80px;
}

.btn-sm { padding: .4rem .85rem; font-size: .825rem; }

.palette-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: .5rem;
}
.palette-title { font-size: .875rem; font-weight: 600; color: var(--text-2); }

.color-palette {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.color-swatch {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .4rem .65rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: box-shadow .15s;
}
.color-swatch:hover { box-shadow: var(--shadow-sm); }

.color-swatch-dot {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,.1);
  flex-shrink: 0;
}
.color-swatch-hex {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: .8rem;
  font-weight: 500;
  color: var(--text);
}
.color-swatch-copy, .color-swatch-del {
  color: var(--text-3);
  display: flex;
  padding: 2px;
  border-radius: 3px;
  transition: color .15s, background .15s;
}
.color-swatch-copy:hover { color: var(--blue); background: var(--blue-light); }
.color-swatch-del:hover { color: #EF4444; background: #FEF2F2; }
.color-swatch-copy svg, .color-swatch-del svg { width: 14px; height: 14px; }

/* ---------- Animations ---------- */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
@keyframes scaleIn { from { opacity: 0; transform: scale(.95); } to { opacity: 1; transform: scale(1); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse-border { 0%, 100% { border-color: var(--pink); } 50% { border-color: var(--blue); } }

/* ---------- Utility ---------- */
.hidden { display: none !important; }
.mt-1 { margin-top: 1rem; }
.mt-half { margin-top: .5rem; }

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .tool-grid { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 1.6rem; }
  #main { padding: 1.5rem 1rem 3rem; }
  .tb-controls { gap: .35rem; }
}

@media (max-width: 480px) {
  .header-tagline { display: none; }
  .tool-grid { grid-template-columns: 1fr; }
  .tool-actions { flex-direction: column; align-items: stretch; }
  .tool-actions .btn { width: 100%; }
  .tool-actions .output-sel { justify-content: center; }
  .inline-fields { flex-direction: column; }
  .inline-fields .form-group { min-width: 0; }
}