/* ============================================================
   /projects/pdf-tools — shared tool shell
   Extends design tokens from /styles.css
   ============================================================ */

/* ---------- layout ---------- */
.tools-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: clamp(32px, 5vw, 64px);
  padding-top: clamp(110px, 12vw, 160px);
  padding-bottom: clamp(80px, 10vw, 140px);
  min-height: 100vh;
}
@media (max-width: 900px) { .tools-shell { grid-template-columns: 1fr; gap: 32px; } }

/* ---------- sidebar nav ---------- */
.tools-nav {
  position: sticky;
  top: 100px;
  align-self: start;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-muted);
}
.tools-nav__title {
  font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--text-secondary);
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.tools-nav__group { margin-top: 18px; }
.tools-nav__group-label {
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 8px;
}
.tools-nav a {
  display: block;
  padding: 5px 0 5px 12px;
  border-left: 1px solid var(--border);
  color: var(--text-muted);
  transition: color 0.25s ease, border-color 0.25s ease;
}
.tools-nav a:hover { color: var(--text); border-color: var(--text-muted); }
.tools-nav a.is-active { color: var(--accent); border-color: var(--accent); }
@media (max-width: 900px) { .tools-nav { position: static; } }

/* ---------- tool main ---------- */
.tool-main { min-width: 0; }

.tool-head {
  margin-bottom: clamp(36px, 5vw, 56px);
  padding-bottom: clamp(24px, 3vw, 32px);
  border-bottom: 1px solid var(--border);
}
.tool-head .crumb {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 18px;
}
.tool-head .crumb a { color: var(--text-muted); transition: color 0.25s ease; }
.tool-head .crumb a:hover { color: var(--accent); }
.tool-head h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.0;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 16px;
}
.tool-head h1 em { font-style: italic; color: var(--accent); }
.tool-head .desc {
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.5;
  color: var(--text-secondary);
  max-width: 64ch;
}

/* ---------- drop zone ---------- */
.drop-zone {
  border: 1.5px dashed var(--border-strong);
  border-radius: 16px;
  padding: clamp(40px, 6vw, 72px) 32px;
  text-align: center;
  background: linear-gradient(180deg, rgba(255,255,255,0.012), rgba(255,255,255,0.003));
  transition: border-color 0.3s ease, background 0.3s ease;
  cursor: pointer;
  position: relative;
}
.drop-zone:hover, .drop-zone.is-dragging {
  border-color: var(--accent);
  background: linear-gradient(180deg, var(--accent-soft), rgba(255,255,255,0.005));
}
.drop-zone__icon {
  display: inline-grid; place-items: center;
  width: 54px; height: 54px;
  border-radius: 12px;
  border: 1px solid var(--border-strong);
  background: var(--bg-elevated);
  margin: 0 auto 18px;
  color: var(--accent);
}
.drop-zone__icon svg { width: 26px; height: 26px; stroke: currentColor; stroke-width: 1.5; fill: none; }
.drop-zone__title {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.2vw, 28px);
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 8px;
}
.drop-zone__hint {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}
.drop-zone__hint .accent { color: var(--accent); }
.drop-zone input[type="file"] { display: none; }

/* ---------- panel / section ---------- */
.tool-panel {
  margin-top: clamp(32px, 4vw, 48px);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: clamp(24px, 3vw, 36px);
  background: linear-gradient(180deg, rgba(255,255,255,0.012), rgba(255,255,255,0.003));
}
.tool-panel__head {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
  gap: 16px;
  flex-wrap: wrap;
}
.tool-panel__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-secondary);
}
.tool-panel__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

/* ---------- file list ---------- */
.file-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.file-list li {
  display: grid;
  grid-template-columns: 24px 1fr auto auto;
  gap: 14px;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255,255,255,0.012);
  font-size: 14px;
}
.file-list .ix { font-family: var(--font-mono); font-size: 11px; color: var(--text-muted); letter-spacing: 0.06em; }
.file-list .name { color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-list .size { font-family: var(--font-mono); font-size: 11px; color: var(--text-muted); }
.file-list .remove {
  background: none; border: 0; cursor: pointer;
  color: var(--text-muted); font-size: 18px; line-height: 1;
  padding: 4px 6px; border-radius: 4px;
  transition: color 0.2s ease;
}
.file-list .remove:hover { color: #F87171; }

/* ---------- form controls ---------- */
.field { display: grid; gap: 8px; margin-bottom: 18px; }
.field__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.field__hint { font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); margin-top: 4px; }

.input, .textarea, .select {
  background: rgba(0,0,0,0.25);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 10px 14px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 13px;
  outline: none;
  transition: border-color 0.25s ease, background 0.25s ease;
  width: 100%;
}
.input:focus, .textarea:focus, .select:focus {
  border-color: var(--accent);
  background: rgba(37, 99, 235, 0.08);
}
.textarea { min-height: 240px; font-family: var(--font-mono); font-size: 13px; line-height: 1.55; resize: vertical; }

/* Force dark-mode dropdown options (native OS theme inherits otherwise → white-on-white) */
.select option,
select option {
  background-color: #14171C;
  color: #EAECEF;
}
.select option:checked,
select option:checked {
  background-color: #2563EB;
  color: #FFFFFF;
}

.row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 600px) { .row { grid-template-columns: 1fr; } }

.toggle-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.toggle-pills button {
  padding: 8px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}
.toggle-pills button.is-active {
  background: var(--accent-soft);
  border-color: var(--accent-soft);
  color: var(--accent);
}

/* ---------- actions ---------- */
.tool-actions {
  display: flex; flex-wrap: wrap; gap: 12px;
  margin-top: 24px;
}
.tool-actions .btn { padding: 12px 22px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; }

/* ---------- progress / status ---------- */
.tool-status {
  margin-top: 24px;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  display: none;
}
.tool-status.is-visible { display: block; }
.tool-status.is-error { border-color: rgba(248, 113, 113, 0.4); color: #FCA5A5; background: rgba(248, 113, 113, 0.05); }
.tool-status.is-success { border-color: var(--accent-soft); color: var(--accent); background: var(--accent-soft); }

.progress {
  width: 100%; height: 4px;
  background: rgba(255,255,255,0.04);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 12px;
  display: none;
}
.progress.is-active { display: block; }
.progress__bar {
  height: 100%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
  transition: width 0.2s ease;
  width: 0%;
}

/* ---------- result panel ---------- */
.result {
  margin-top: 24px;
  padding: 20px;
  border: 1px solid var(--accent-soft);
  border-radius: 12px;
  background: var(--accent-soft);
  display: none;
}
.result.is-visible { display: block; }
.result__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.result__grid {
  display: grid; grid-template-columns: 1fr auto; gap: 16px; align-items: center;
}

/* ---------- preview canvases ---------- */
.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
  margin-top: 18px;
}
.preview-grid img,
.preview-grid canvas {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  display: block;
}

/* ---------- signature pad ---------- */
.sig-pad-wrap {
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  background: #FFFFFF;
  padding: 8px;
  position: relative;
}
.sig-pad-wrap canvas { display: block; width: 100%; height: 200px; cursor: crosshair; }
.sig-pad-actions {
  display: flex; gap: 8px;
  margin-top: 10px;
}

/* ---------- key-value output rows (QR data, etc.) ---------- */
.kv-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  padding: 10px 0;
  border-top: 1px solid var(--border);
  font-size: 13px;
}
.kv-row:first-of-type { border-top: 0; }
.kv-row .k {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.kv-row .v { color: var(--text); word-break: break-word; }