/* ============================================================
   PyPDF Studio — Stylesheet
   Light + Dark theme via [data-theme] on <html>
   ============================================================ */

/* ---------- LIGHT (default) ---------- */
:root,
[data-theme="light"] {
  --navy:        #1e3a5f;
  --navy-dark:   #15294a;
  --navy-soft:   #2c5282;
  --blue:        #3182ce;
  --blue-hover:  #2b6cb0;

  --bg:          #f5f7fa;
  --surface:     #ffffff;
  --surface-2:   #f9fafb;
  --border:      #e2e8f0;
  --border-2:    #cbd5e0;

  --text:        #2d3748;
  --text-soft:   #4a5568;
  --muted:       #718096;
  --dim:         #a0aec0;

  --topbar-bg:   #1e3a5f;
  --topbar-text: #ffffff;
  --topbar-sub:  rgba(255,255,255,0.62);
  --topbar-input-bg:     rgba(255,255,255,0.08);
  --topbar-input-border: rgba(255,255,255,0.12);

  --success:     #38a169;
  --error:       #e53e3e;
  --warning:     #d69e2e;
  --teal:        #319795;

  --radius:      14px;
  --radius-sm:   10px;
  --shadow-sm:   0 1px 2px rgba(30, 58, 95, 0.06);
  --shadow-md:   0 6px 18px rgba(30, 58, 95, 0.08);
  --shadow-lg:   0 14px 32px rgba(30, 58, 95, 0.12);
  --transition:  0.18s ease;
}

/* ---------- DARK ---------- */
[data-theme="dark"] {
  --navy:        #58a6ff;
  --navy-dark:   #1f6feb;
  --navy-soft:   #79c0ff;
  --blue:        #58a6ff;
  --blue-hover:  #79c0ff;

  --bg:          #0d1117;
  --surface:     #161b22;
  --surface-2:   #1c2128;
  --border:      #30363d;
  --border-2:    #3d444d;

  --text:        #e6edf3;
  --text-soft:   #c9d1d9;
  --muted:       #8b949e;
  --dim:         #6e7681;

  --topbar-bg:   #161b22;
  --topbar-text: #e6edf3;
  --topbar-sub:  rgba(230,237,243,0.55);
  --topbar-input-bg:     rgba(255,255,255,0.06);
  --topbar-input-border: rgba(255,255,255,0.12);

  --success:     #3fb950;
  --error:       #f85149;
  --warning:     #d29922;
  --teal:        #56d4dd;

  --shadow-sm:   0 1px 2px rgba(0,0,0,0.4);
  --shadow-md:   0 6px 18px rgba(0,0,0,0.5);
  --shadow-lg:   0 14px 32px rgba(0,0,0,0.6);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
               Inter, system-ui, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background 0.25s ease, color 0.25s ease;
}

a { color: inherit; text-decoration: none; }

/* ============================================================
   TOPBAR
   ============================================================ */
.topbar {
  background: var(--topbar-bg);
  color: var(--topbar-text);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 20;
  transition: background 0.25s ease;
}

.topbar-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }

.brand-mark {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, #56d4dd, #3182ce);
  display: grid; place-items: center;
  font-weight: 800; color: #fff; font-size: 18px;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font-size: 15px; font-weight: 600; color: var(--topbar-text); }
.brand-sub  { font-size: 11.5px; color: var(--topbar-sub); margin-top: 2px; }

.search-wrap { flex: 1; max-width: 480px; }

.search {
  width: 100%;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--topbar-input-border);
  background: var(--topbar-input-bg);
  color: var(--topbar-text);
  font-size: 13.5px;
  font-family: inherit;
  transition: var(--transition);
  outline: none;
}
.search::placeholder { color: var(--topbar-sub); }
.search:focus {
  background: rgba(255,255,255,0.14);
  border-color: rgba(86, 212, 221, 0.5);
}

.topbar-right { display: flex; align-items: center; gap: 12px; margin-left: auto; }

.badge {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.85);
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}

.btn-ghost {
  background: transparent;
  color: var(--topbar-text);
  border: 1px solid rgba(255,255,255,0.25);
  padding: 8px 14px;
  font-size: 13px;
  border-radius: 8px;
  transition: var(--transition);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.5);
}

/* ---- Theme toggle ---- */
.theme-toggle {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.18);
  color: var(--topbar-text);
  width: 38px; height: 38px;
  border-radius: 10px;
  display: grid; place-items: center;
  cursor: pointer;
  font-size: 17px;
  transition: var(--transition);
  padding: 0;
}
.theme-toggle:hover {
  background: rgba(255,255,255,0.16);
  transform: translateY(-1px);
}

/* ============================================================
   HERO
   ============================================================ */
.hero { text-align: center; padding: 48px 24px 24px; }
.hero h1 {
  font-size: 26px; font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.01em;
}
.hero p { margin-top: 8px; font-size: 14.5px; color: var(--muted); }

/* ============================================================
   FILTER CHIPS
   ============================================================ */
.filters {
  display: flex; flex-wrap: wrap; gap: 8px;
  justify-content: center;
  padding: 8px 24px 28px;
  max-width: 1240px;
  margin: 0 auto;
}
.filter-chip {
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-soft);
  font-size: 12.5px;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}
.filter-chip:hover { border-color: var(--blue); color: var(--blue); }
.filter-chip.active {
  background: var(--navy);
  color: #fff;
  border-color: var(--navy);
}

/* ============================================================
   TOOL GRID
   ============================================================ */
.grid-wrap { max-width: 1240px; margin: 0 auto; padding: 0 24px 48px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.tool-card {
  position: relative;
  display: flex; align-items: flex-start; gap: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  transition: var(--transition);
  overflow: hidden;
}
.tool-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--blue);
  opacity: 0;
  transition: var(--transition);
}
.tool-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-2);
  box-shadow: var(--shadow-md);
}
.tool-card:hover::before { opacity: 1; }

.tool-icon {
  flex-shrink: 0;
  width: 42px; height: 42px;
  border-radius: 10px;
  display: grid; place-items: center;
  background: #ebf4ff; color: var(--blue);
}
.tool-icon svg { width: 22px; height: 22px; }

[data-theme="dark"] .tool-icon { background: rgba(88,166,255,0.12); }

.tool-icon.cat-organize        { background: #ebf4ff; color: #3182ce; }
.tool-icon.cat-optimize        { background: #e6fffa; color: #319795; }
.tool-icon.cat-converttopdf    { background: #fffaf0; color: #dd6b20; }
.tool-icon.cat-convertfrompdf  { background: #faf5ff; color: #805ad5; }
.tool-icon.cat-edit            { background: #e6fffa; color: #2c7a7b; }
.tool-icon.cat-security        { background: #fff5f5; color: #c53030; }
.tool-icon.cat-watermark       { background: #fffbea; color: #b7791f; }
.tool-icon.cat-ocr             { background: #fff5f7; color: #b83280; }
.tool-icon.cat-compare         { background: #ebf4ff; color: #5a67d8; }
.tool-icon.cat-universal       { background: #e8f0fa; color: #1e3a5f; }

[data-theme="dark"] .tool-icon[class*="cat-"] {
  background: rgba(88,166,255,0.1);
  color: var(--blue);
}

.tool-body { flex: 1; min-width: 0; }
.tool-name { font-size: 14.5px; font-weight: 600; color: var(--navy); margin-bottom: 3px; }
.tool-desc { font-size: 12.5px; color: var(--muted); line-height: 1.45; }

.tool-cat {
  position: absolute;
  top: 12px; right: 12px;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--dim);
  font-weight: 600;
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 48px 0;
  font-size: 14px;
}

/* ============================================================
   TOOL PAGE
   ============================================================ */
.tool-main { max-width: 680px; margin: 0 auto; padding: 40px 24px 60px; }

/* Preview stage gets a wider canvas than the upload stage.
   tool.js toggles body.preview-active when the preview stage is shown. */
body.preview-active .tool-main {
  max-width: 1180px;
}
body.preview-active .tool-panel {
  padding: 32px 36px;
}

.tool-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.tool-panel::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--navy), var(--blue), var(--teal));
}

.tool-panel-head {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.tool-panel-head h1 {
  font-size: 22px;
  color: var(--navy);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.tool-panel-head p { margin-top: 6px; font-size: 13.5px; color: var(--muted); }

.stage { animation: fade .22s ease; }
.stage[hidden] { display: none; }

@keyframes fade {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.dropzone {
  border: 2px dashed var(--border-2);
  border-radius: var(--radius);
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: var(--surface-2);
  outline: none;
}
.dropzone:hover, .dropzone:focus-visible {
  border-color: var(--blue);
  background: #ebf4ff;
}
[data-theme="dark"] .dropzone:hover,
[data-theme="dark"] .dropzone:focus-visible {
  background: rgba(88,166,255,0.08);
}
.dropzone.dragging {
  border-color: var(--teal);
  background: #e6fffa;
  transform: scale(1.005);
}
[data-theme="dark"] .dropzone.dragging {
  background: rgba(86,212,221,0.1);
}

.dz-icon { color: var(--blue); margin-bottom: 12px; display: inline-block; }
.dz-title { font-size: 15px; font-weight: 600; color: var(--navy); margin-bottom: 4px; }
.dz-sub {
  font-size: 12px; color: var(--dim);
  text-transform: uppercase; letter-spacing: 0.08em;
  margin: 10px 0;
}
.dz-hint { margin-top: 16px; font-size: 12px; color: var(--muted); }

.url-box { margin-top: 20px; }
.url-box[hidden] { display: none; }

.file-summary {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-bottom: 22px;
  font-size: 13px;
  color: var(--text-soft);
}
.file-summary .fs-name { font-weight: 600; color: var(--navy); display: block; margin-bottom: 2px; }
.file-summary .fs-meta { font-size: 11.5px; color: var(--muted); }

.section-title {
  font-size: 13px; font-weight: 600;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.field { margin-bottom: 16px; }
.field-label {
  display: block;
  font-size: 12.5px; font-weight: 500;
  color: var(--text-soft);
  margin-bottom: 6px;
}

.input {
  width: 100%;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  transition: var(--transition);
  outline: none;
}
.input:hover { border-color: var(--border-2); }
.input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.12);
}

select.input {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23718096' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'/></svg>");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500;
  font-family: inherit;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-primary {
  background: var(--navy);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(30, 58, 95, 0.2);
}
.btn-primary:hover:not(:disabled) {
  background: var(--navy-dark);
  box-shadow: 0 8px 18px rgba(30, 58, 95, 0.28);
  transform: translateY(-1px);
}

.btn-outline {
  background: var(--surface);
  color: var(--navy);
  border-color: var(--border-2);
  padding: 10px 20px;
  font-size: 13px;
}
.btn-outline:hover { border-color: var(--blue); color: var(--blue); background: #ebf4ff; }
[data-theme="dark"] .btn-outline:hover { background: rgba(88,166,255,0.1); }

.btn-block { width: 100%; margin-top: 20px; }

.row-actions { display: flex; gap: 10px; margin-top: 24px; justify-content: space-between; }
.row-actions.center { justify-content: center; }

/* ---- Progress ---- */
.progress { padding: 20px 0; text-align: center; }
.progress-bar {
  width: 100%; height: 8px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--blue), var(--teal));
  border-radius: 999px;
  transition: width 0.3s ease;
}
.progress-text { margin-top: 14px; font-size: 13px; color: var(--muted); }

/* ---- Result / Error ---- */
.result-icon {
  width: 56px; height: 56px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 26px; font-weight: 700;
  margin: 4px auto 18px;
}
.result-icon.success {
  background: rgba(56,161,105,0.12);
  color: var(--success);
  border: 1px solid rgba(56,161,105,0.3);
}
.result-icon.error {
  background: rgba(229,62,62,0.12);
  color: var(--error);
  border: 1px solid rgba(229,62,62,0.3);
}
.result-title {
  text-align: center;
  font-size: 18px; font-weight: 600;
  color: var(--navy);
  margin-bottom: 8px;
}
.result-text {
  text-align: center;
  font-size: 13px; color: var(--muted);
  margin-bottom: 20px;
  word-break: break-word;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--border);
  padding: 22px;
  text-align: center;
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.footer strong { color: var(--navy); font-weight: 600; }

/* ---- About Developer button ---- */
.about-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-soft);
  font-size: 12.5px;
  font-weight: 600;
  transition: var(--transition);
  text-decoration: none;
}
.about-btn:hover {
  border-color: var(--blue);
  color: var(--blue);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.about-btn-avatar {
  width: 22px; height: 22px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border);
}
.about-btn-avatar-placeholder {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent, #56d4dd), var(--blue));
  display: grid; place-items: center;
  color: #fff; font-size: 11px; font-weight: 700;
}

/* ============================================================
   PREVIEW (Split / Reorder / etc.)
   ============================================================ */
.preview-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; margin-bottom: 10px; flex-wrap: wrap;
}
.preview-info { min-width: 0; }
.preview-filename {
  font-size: 13.5px; font-weight: 600; color: var(--navy);
  display: block; overflow: hidden; text-overflow: ellipsis;
  white-space: nowrap; max-width: 340px;
}
.preview-pagecount { font-size: 11.5px; color: var(--muted); }
.preview-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.btn-sm { padding: 6px 12px !important; font-size: 12px !important; }

.preview-hint {
  font-size: 12.5px; color: var(--text-soft);
  background: #ebf4ff;
  border: 1px solid #bee3f8;
  border-radius: 8px;
  padding: 9px 12px;
  margin-bottom: 14px;
  line-height: 1.5;
}
[data-theme="dark"] .preview-hint {
  background: rgba(88,166,255,0.08);
  border-color: rgba(88,166,255,0.2);
}

#preview-strip-wrap {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px 18px;
  overflow-x: auto;
  margin-bottom: 18px;
  min-height: 300px;
}

.preview-loading {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 12px; padding: 40px 0;
  color: var(--muted); font-size: 13px;
}
.spinner {
  width: 34px; height: 34px;
  border: 3px solid var(--border);
  border-top-color: var(--blue);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.preview-strip {
  display: flex; align-items: center; gap: 0;
  padding-bottom: 8px; min-height: 260px;
}

.preview-card {
  position: relative; flex: 0 0 auto;
  width: 190px; height: 258px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 10px;
  cursor: pointer; overflow: hidden;
  transition: var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.preview-card:hover {
  border-color: var(--blue);
  box-shadow: 0 6px 18px rgba(49, 130, 206, 0.22);
  transform: translateY(-2px);
}
.preview-thumb {
  max-width: 100%; max-height: 100%;
  object-fit: contain; transition: transform 0.25s ease;
  user-select: none; pointer-events: none;
}
.preview-page-num {
  position: absolute; top: 6px; right: 8px;
  font-size: 12px; font-weight: 600;
  color: var(--muted);
  background: var(--surface-2);
  padding: 2px 8px; border-radius: 5px;
  border: 1px solid var(--border);
}
.preview-zoom {
  position: absolute; bottom: 6px; right: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 28px; height: 28px;
  display: grid; place-items: center;
  font-size: 13px; cursor: pointer;
  opacity: 0; transition: var(--transition);
  padding: 0; line-height: 1;
}
.preview-card:hover .preview-zoom { opacity: 1; }
.preview-zoom:hover { background: #ebf4ff; }

.preview-card.marked-remove {
  border-color: var(--error);
  box-shadow: 0 0 0 2px rgba(229, 62, 62, 0.2);
}
.preview-card.marked-remove::after {
  content: "✕";
  position: absolute; inset: 0;
  background: rgba(229, 62, 62, 0.35);
  color: #fff; display: grid; place-items: center;
  font-size: 56px; font-weight: 300;
}
.preview-card.marked-extract {
  border-color: var(--success);
  box-shadow: 0 0 0 2px rgba(56, 161, 105, 0.2);
}
.preview-card.marked-extract::after {
  content: "✓";
  position: absolute; inset: 0;
  background: rgba(56, 161, 105, 0.3);
  color: #fff; display: grid; place-items: center;
  font-size: 56px; font-weight: 600;
}
.preview-card.swap-active {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(49, 151, 149, 0.25);
}

.preview-scissors {
  flex: 0 0 auto;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  width: 56px; gap: 6px; align-self: stretch;
}
.preview-scissors-line {
  flex: 1; width: 0;
  border-left: 2px dotted var(--border-2);
  min-height: 30px;
}
.preview-scissors-btn {
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: 50%;
  width: 36px; height: 36px;
  font-size: 17px; color: var(--muted);
  cursor: pointer; transition: var(--transition);
  display: grid; place-items: center;
  padding: 0; line-height: 1;
}
.preview-scissors-btn:hover {
  color: var(--blue);
  border-color: var(--blue);
  background: #ebf4ff;
  transform: scale(1.08);
}
.preview-scissors.active .preview-scissors-btn {
  background: var(--navy); color: #fff; border-color: var(--navy);
}
.preview-scissors.active .preview-scissors-line {
  border-left-color: var(--navy);
  border-left-style: solid;
}

.preview-options {
  margin-top: 12px; margin-bottom: 4px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  background: var(--surface-2);
  font-size: 12.5px;
}
.preview-options summary {
  cursor: pointer; user-select: none;
  font-weight: 600; color: var(--text-soft);
  font-size: 12px; text-transform: uppercase;
  letter-spacing: 0.04em;
}
.preview-options summary:hover { color: var(--blue); }
.preview-options .field { margin-top: 10px; }

/* Lightbox */
.lightbox {
  position: fixed; inset: 0;
  background: rgba(13, 25, 45, 0.85);
  display: grid; place-items: center;
  z-index: 100; padding: 24px;
  animation: fade 0.2s ease;
}
.lightbox[hidden] { display: none; }
.lightbox-inner { position: relative; max-width: 90vw; max-height: 90vh; }
.lightbox img {
  max-width: 90vw; max-height: 90vh;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  border-radius: 6px;
  background: #fff;
}
.lightbox-close {
  position: absolute; top: -14px; right: -14px;
  width: 34px; height: 34px;
  border-radius: 50%; background: #fff; border: none;
  font-size: 20px; cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
  display: grid; place-items: center;
  line-height: 1; color: var(--navy);
}
.lightbox-close:hover { background: #f5f7fa; }

/* Sign arrow pad */
.arrow-pad {
  display: grid;
  grid-template-columns: repeat(3, 40px);
  grid-template-rows: repeat(3, 40px);
  gap: 4px;
}
.arrow-btn {
  display: grid; place-items: center;
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: 8px;
  color: var(--navy);
  font-size: 14px; font-weight: 700;
  cursor: pointer; transition: var(--transition);
  padding: 0; line-height: 1; user-select: none;
}
.arrow-btn:hover {
  background: #ebf4ff;
  border-color: var(--blue);
  color: var(--blue);
  transform: scale(1.06);
}
.arrow-btn:active { transform: scale(0.94); }
.arrow-up     { grid-column: 2; grid-row: 1; }
.arrow-left   { grid-column: 1; grid-row: 2; }
.arrow-center { grid-column: 2; grid-row: 2; font-size: 10px; color: var(--muted); }
.arrow-right  { grid-column: 3; grid-row: 2; }
.arrow-down   { grid-column: 2; grid-row: 3; }

.preview-controls {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 12px;
  display: flex; flex-direction: column; gap: 10px;
}
.preview-controls[hidden] { display: none; }
.ctrl-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.ctrl-label {
  font-size: 12.5px; font-weight: 600;
  color: var(--text-soft);
  min-width: 120px;
}
.ctrl-radios {
  display: flex; gap: 14px; flex-wrap: wrap;
  font-size: 13px; color: var(--text);
}
.ctrl-radios label { display: flex; align-items: center; gap: 5px; cursor: pointer; }
.ctrl-row input[type="range"] {
  flex: 1; min-width: 140px; max-width: 260px;
  accent-color: var(--navy);
}
.ctrl-val {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12px; color: var(--muted); min-width: 42px;
}
.chip-row { display: flex; flex-wrap: wrap; gap: 6px; }
.page-chip {
  min-width: 30px; height: 28px;
  border-radius: 6px;
  border: 1px solid var(--border-2);
  background: var(--surface);
  color: var(--text-soft);
  font-size: 12px; font-weight: 600;
  cursor: pointer; padding: 0 8px;
  transition: var(--transition);
}
.page-chip:hover { border-color: var(--blue); color: var(--blue); }
.page-chip.active { background: var(--navy); color: #fff; border-color: var(--navy); }

.preview-thumb-wrap {
  position: relative; width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.signature-marker {
  position: absolute; pointer-events: none;
  transform: translate(-50%, -50%);
  border: 1px dashed rgba(30, 58, 95, 0.5);
  background: rgba(255, 255, 255, 0.55);
  border-radius: 4px; object-fit: contain;
  max-height: 40%; z-index: 5;
}
.wm-overlay {
  position: absolute; top: 50%; left: 50%;
  transform-origin: center center;
  pointer-events: none; z-index: 4;
  white-space: nowrap;
  font-weight: 700; letter-spacing: 0.05em;
  color: #333;
}
.wm-overlay.wm-text {
  font-size: 34px; text-transform: uppercase;
  font-family: Georgia, "Times New Roman", serif;
}
.wm-overlay.wm-image {
  max-width: 80%; max-height: 80%; object-fit: contain;
}

/* ============================================================
   ABOUT / DEVELOPER PROFILE
   ============================================================ */
.about-wrap {
  max-width: 820px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.profile-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}
.profile-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--navy), var(--blue), var(--teal));
}

.profile-head {
  display: flex; align-items: center; gap: 22px;
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.profile-avatar {
  width: 120px; height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border);
  box-shadow: var(--shadow-md);
  flex-shrink: 0;
  background: var(--surface-2);
}
.profile-avatar-placeholder {
  width: 120px; height: 120px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--navy), var(--blue));
  display: grid; place-items: center;
  color: #fff; font-size: 44px; font-weight: 700;
  flex-shrink: 0;
  box-shadow: var(--shadow-md);
}

.profile-head-text { min-width: 0; flex: 1; }
.profile-head-text h1 {
  font-size: 24px;
  color: var(--navy);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}
.profile-head-text .role {
  font-size: 14px;
  color: var(--muted);
  font-weight: 500;
}

.profile-section { margin-top: 32px; }
.profile-section h2 {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}
.profile-section p {
  font-size: 15px;
  color: var(--text);
  line-height: 1.75;
  margin-bottom: 12px;
}

.profession-list {
  list-style: none;
  display: grid;
  gap: 8px;
}
.profession-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text);
  font-weight: 500;
}
.profession-list li::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--teal));
  flex-shrink: 0;
}

/* ---- Contact buttons ---- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin-top: 4px;
}
.contact-btn {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 13.5px;
  font-weight: 600;
  transition: var(--transition);
  text-decoration: none;
  border: 1px solid rgba(0,0,0,0.08);
}
.contact-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  filter: brightness(1.08);
}
.contact-btn svg {
  width: 20px; height: 20px;
  flex-shrink: 0;
}
.contact-btn.telegram  { background: #229ED9; }
.contact-btn.whatsapp  { background: #25D366; }
.contact-btn.instagram { background: linear-gradient(45deg, #F58529, #DD2A7B, #8134AF); }
.contact-btn.youtube   { background: #FF0000; }
.contact-btn.github    { background: #24292F; }
.contact-btn.email     { background: #6B7280; }

/* ---- Tagline ---- */
.tagline {
  text-align: center;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  font-size: 16px;
  font-weight: 600;
  color: var(--navy);
  letter-spacing: 0.01em;
}
.tagline span {
  display: inline-block;
  padding: 6px 18px;
  background: linear-gradient(135deg, rgba(88,166,255,0.1), rgba(86,212,221,0.1));
  border-radius: 999px;
}

/* ---- Avatar upload form (admin) ---- */
.avatar-admin {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px dashed var(--border);
  font-size: 13px;
  color: var(--muted);
}
.avatar-admin summary {
  cursor: pointer; user-select: none;
  font-weight: 600;
  color: var(--text-soft);
  padding: 6px 0;
}
.avatar-admin summary:hover { color: var(--blue); }
.avatar-admin form {
  margin-top: 14px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.avatar-admin input[type="file"] {
  font-size: 13px;
  color: var(--text-soft);
}
.flash {
  padding: 10px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 13px;
  font-weight: 500;
}
.flash.success {
  background: rgba(56,161,105,0.12);
  color: var(--success);
  border: 1px solid rgba(56,161,105,0.3);
}
.flash.error {
  background: rgba(229,62,62,0.12);
  color: var(--error);
  border: 1px solid rgba(229,62,62,0.3);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 720px) {
  .topbar-inner { padding: 12px 16px; gap: 12px; }
  .search-wrap { display: none; }
  .hero { padding: 32px 16px 16px; }
  .hero h1 { font-size: 21px; }
  .filters { padding: 8px 16px 22px; }
  .grid-wrap { padding: 0 16px 40px; }
  .grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .tool-card { padding: 14px; gap: 10px; }
  .tool-icon { width: 36px; height: 36px; }
  .tool-name { font-size: 13px; }
  .tool-desc { font-size: 11.5px; }
  .tool-cat { display: none; }
  .tool-main { padding: 24px 16px 40px; }
  .tool-panel { padding: 22px; }
  .preview-card { width: 132px; height: 180px; }
  .preview-scissors { width: 40px; }
  .preview-filename { max-width: 180px; }
  /* Never let the widened preview canvas overflow a phone */
  body.preview-active .tool-main { max-width: 100%; }
  body.preview-active .tool-panel { padding: 22px; }
  .about-wrap { padding: 32px 16px 60px; }
  .profile-card { padding: 24px; }
  .profile-avatar, .profile-avatar-placeholder { width: 90px; height: 90px; }
  .profile-head-text h1 { font-size: 20px; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 420px) {
  .grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   ADMIN LOGIN PAGE
   ============================================================ */
.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(900px 500px at 15% 10%, rgba(86,212,221,0.10), transparent 60%),
    radial-gradient(700px 400px at 85% 90%, rgba(240,168,104,0.08), transparent 60%),
    var(--bg);
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  animation: loginFade 0.35s ease;
}

@keyframes loginFade {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.login-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--navy), var(--blue), var(--teal));
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
}

.login-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

.login-sub {
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 22px;
}

.login-form {
  display: flex;
  flex-direction: column;
}

.login-form .field { margin-bottom: 14px; }

.login-form .btn-block {
  margin-top: 12px;
  padding: 12px 20px;
  font-size: 15px;
}

.login-footer {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.login-back {
  font-size: 13px;
  color: var(--muted);
  transition: color 0.15s;
  text-decoration: none;
}

.login-back:hover { color: var(--blue); }

.login-disabled {
  text-align: center;
  padding: 12px 0;
}

.login-disabled-icon {
  font-size: 42px;
  margin-bottom: 16px;
  opacity: 0.65;
}

.login-disabled h2 {
  font-size: 17px;
  color: var(--navy);
  margin-bottom: 10px;
}

.login-disabled p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 12px;
}

.login-disabled code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  background: var(--surface-2);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text);
  font-size: 12.5px;
}