/*
  HardePDF styles
  - Modern, minimal UI
  - Responsive layout (sidebar + stage on desktop, stacked on mobile)
  - Uses CSS variables for easy theme switching (dark/light)
*/

:root{
  /* Theme tokens (default: dark) */
  --bg: #0b1020;
  --panel: rgba(255,255,255,0.06);
  --panel2: rgba(255,255,255,0.08);
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.68);
  --border: rgba(255,255,255,0.14);
  --shadow: 0 18px 45px rgba(0,0,0,0.35);
  --accent: #8b5cf6;
  --accent2: #22c55e;
  --danger: #ef4444;
  --focus: rgba(139,92,246,0.55);
  --radius: 16px;
  --radius2: 12px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

[data-theme="light"]{
  /* Theme tokens (light mode) */
  --bg: #f5f7ff;
  --panel: rgba(17,24,39,0.04);
  --panel2: rgba(17,24,39,0.06);
  --text: rgba(17,24,39,0.92);
  --muted: rgba(17,24,39,0.64);
  --border: rgba(17,24,39,0.14);
  --shadow: 0 18px 45px rgba(17,24,39,0.12);
  --accent: #6d28d9;
  --accent2: #16a34a;
  --danger: #dc2626;
  --focus: rgba(109,40,217,0.35);
}

/* Base resets */
*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  /* Soft gradients for a modern “glass” look */
  background:
    radial-gradient(1200px 700px at 15% 15%, rgba(139,92,246,0.26), transparent 60%),
    radial-gradient(1000px 600px at 85% 30%, rgba(34,197,94,0.14), transparent 60%),
    radial-gradient(800px 500px at 55% 95%, rgba(56,189,248,0.12), transparent 60%),
    var(--bg);
}

.app{
  min-height: 100%;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

/* Top bar (sticky toolbar) */
.topbar{
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: rgba(0,0,0,0.18);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

[data-theme="light"] .topbar{
  background: rgba(255,255,255,0.72);
}

/* Brand area */
.brand{ display: flex; gap: 12px; align-items: center; }
.brand__mark{
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), rgba(34,197,94,0.75));
  color: white;
  font-weight: 800;
  box-shadow: var(--shadow);
}
.brand__title{ font-weight: 800; letter-spacing: 0.2px; }
.brand__tagline{ font-size: 12px; color: var(--muted); margin-top: 2px; }

/* Toolbar row */
.toolbar{
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.sep{
  width: 1px;
  height: 26px;
  background: var(--border);
}

/* Buttons */
.btn{
  appearance: none;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.08);
  color: var(--text);
  border-radius: 999px;
  padding: 9px 12px;
  font-weight: 650;
  letter-spacing: 0.2px;
  cursor: pointer;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease, opacity 140ms ease;
}
.btn:hover{ transform: translateY(-1px); background: rgba(255,255,255,0.12); }
.btn:active{ transform: translateY(0px); }
.btn:disabled{
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}
.btn:focus-visible{
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}
.btn--ghost{ background: transparent; }
.btn--danger{
  border-color: rgba(239,68,68,0.35);
  background: rgba(239,68,68,0.12);
}

/* Small badges (page number and zoom) */
.pageBadge, .zoomBadge{
  font-family: var(--mono);
  font-size: 12px;
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.06);
  color: var(--muted);
}

.main{
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 14px;
  padding: 14px;
}

/* Sidebar (tabs + panel content) */
.side{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(0,0,0,0.14);
  box-shadow: var(--shadow);
  overflow: hidden;
}

[data-theme="light"] .side{
  background: rgba(255,255,255,0.70);
}

.tabs{
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}

/* Tab buttons */
.tab{
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 12px 10px;
  cursor: pointer;
  font-weight: 700;
  transition: background 160ms ease, color 160ms ease;
}
.tab:hover{ background: rgba(255,255,255,0.06); color: var(--text); }
.tab--active{
  color: var(--text);
  background: rgba(255,255,255,0.08);
}

/* Panels are swapped by JS (only one visible at a time) */
.panel{
  display: none;
  padding: 14px;
}
.panel--active{ display: block; }
.panel__title{ font-weight: 800; margin-bottom: 6px; }
.panel__hint{ margin: 0 0 12px 0; color: var(--muted); font-size: 13px; line-height: 1.45; }
.panel__divider{ height: 1px; background: var(--border); margin: 14px 0; }

/* Drag & drop area */
.dropzone{
  border: 1px dashed rgba(255,255,255,0.28);
  border-radius: var(--radius2);
  background: rgba(255,255,255,0.04);
  padding: 18px;
  cursor: pointer;
  transition: border-color 140ms ease, background 140ms ease, transform 140ms ease;
}
[data-theme="light"] .dropzone{
  border-color: rgba(17,24,39,0.25);
}
.dropzone:hover{ transform: translateY(-1px); background: rgba(255,255,255,0.06); }
.dropzone:focus-visible{ outline: 2px solid var(--focus); outline-offset: 2px; }
.dropzone--active{
  border-color: rgba(139,92,246,0.75);
  background: rgba(139,92,246,0.08);
}
.dropzone__title{ font-weight: 900; }
.dropzone__subtitle{ margin-top: 4px; color: var(--muted); font-size: 12px; }

/* Form elements */
.formRow{ margin-top: 12px; }
.formRow--2{ display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.label{ display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; font-weight: 700; }
.label--inline{ display: inline-block; margin: 0; }
.input, .textarea{
  width: 100%;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 10px;
  outline: none;
}
.input:focus, .textarea:focus{
  border-color: rgba(139,92,246,0.55);
  box-shadow: 0 0 0 3px rgba(139,92,246,0.15);
}
.textarea{
  resize: vertical;
  min-height: 220px;
  line-height: 1.45;
  font-family: var(--mono);
  font-size: 12.5px;
}
.input--color{ padding: 6px; height: 42px; }

/* Checkbox rows inside forms */
.checkRow{
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: 10px 10px;
}
.checkRow input[type="checkbox"]{
  width: 18px;
  height: 18px;
}

/* Action rows (buttons) */
.actions{
  display: flex;
  gap: 10px;
  margin-top: 12px;
}
.actions--stack{ flex-direction: column; }

/* Stage (right side) */
.stage{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(0,0,0,0.14);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: grid;
  grid-template-rows: auto 1fr;
}
[data-theme="light"] .stage{
  background: rgba(255,255,255,0.70);
}

.stage__header{
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}
.stage__title{ font-weight: 900; letter-spacing: 0.2px; }
.stage__meta{ margin-top: 4px; color: var(--muted); font-size: 13px; }

/* Viewer shell is scrollable; centers the rendered page */
.viewerShell{
  position: relative;
  padding: 16px;
  overflow: auto;
  display: grid;
  place-items: start center;
}

/* Empty state before a PDF is loaded */
.viewerEmpty{
  width: 100%;
  display: grid;
  place-items: center;
  padding: 20px;
}

.viewerEmpty__card{
  max-width: 520px;
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.06);
  padding: 18px;
}
.viewerEmpty__title{ font-weight: 950; font-size: 18px; }
.viewerEmpty__text{ margin-top: 8px; color: var(--muted); line-height: 1.55; }

/* Viewer container toggled by JS */
.viewer{
  display: none;
  width: 100%;
  place-items: start center;
}
.viewer--active{ display: grid; }

/* Canvas + overlay wrapper (so overlays can sit on top of the page) */
.pageWrap{
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.06);
  box-shadow: 0 20px 50px rgba(0,0,0,0.28);
}

/* All-pages (continuous) container */
.pagesContainer{
  width: 100%;
  display: grid;
  gap: 16px;
  justify-items: center;
}

.pagesContainer[hidden]{ display: none; }

.pageWrap--multi{
  width: fit-content;
}

#pdfCanvas{
  display: block;
}

/* Overlay layer sits above the canvas */
.overlayLayer{
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 3;
}

/* Editable text layer (best-effort PDF text editing) */
.textEditLayer{
  position: absolute;
  inset: 0;
  pointer-events: auto;
  z-index: 2;
}

/* Draggable text overlay element */
.overlayText{
  position: absolute;
  pointer-events: auto;
  user-select: none;
  padding: 6px 8px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: rgba(255,255,255,0.0);
  backdrop-filter: blur(3px);
  cursor: grab;
  transition: border-color 120ms ease, background 120ms ease, transform 120ms ease;
  white-space: pre;
}
[data-theme="light"] .overlayText{
  background: rgba(255,255,255,0.18);
}
.overlayText:hover{
  border-color: rgba(139,92,246,0.45);
  background: rgba(139,92,246,0.10);
  transform: translateY(-0.5px);
}
.overlayText:active{ cursor: grabbing; transform: translateY(0); }
.overlayText--selected{
  border-color: rgba(34,197,94,0.55);
  background: rgba(34,197,94,0.10);
}

.pdfTextItem{
  position: absolute;
  pointer-events: auto;
  user-select: text;
  box-sizing: border-box;
  padding: 0;
  border-radius: 6px;
  border: 1px solid transparent;
  background: transparent;
  color: #111827;
  font-family: Helvetica, Arial, sans-serif;
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1;
  white-space: pre;
  outline: none;
}

[data-theme="light"] .pdfTextItem{
  background: rgba(255,255,255,0.92);
}

.pdfTextItem:focus{
  border-color: rgba(139,92,246,0.55);
  box-shadow: 0 0 0 3px rgba(139,92,246,0.18);
}

.pdfTextItem--selected{
  border-color: rgba(34,197,94,0.55);
  box-shadow: 0 0 0 3px rgba(34,197,94,0.16);
}

/* Footer */
.footer{
  display: flex;
  gap: 10px;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  background: rgba(0,0,0,0.18);
  backdrop-filter: blur(12px);
  color: var(--muted);
  font-size: 12px;
}
[data-theme="light"] .footer{
  background: rgba(255,255,255,0.72);
}
.footer__right{ font-family: var(--mono); }

/* Responsive layout: stack sidebar and viewer on smaller screens */
@media (max-width: 980px){
  .main{ grid-template-columns: 1fr; }
  .tabs{ grid-template-columns: 1fr; }
  .toolbar{ justify-content: flex-start; }
}