/**
 * Split PDF — workspace styles
 * ─────────────────────────────────────────────────────────────────────
 * Renders after a file is selected (inside #workspace-page).
 * Scoped under .sp-workspace so it never leaks into other tool pages.
 * Uses the shared design tokens from assets/css/variables.min.css so it
 * automatically follows the site's light/dark theme.
 */

.sp-workspace,
.sp-workspace *,
.sp-workspace *::before,
.sp-workspace *::after { box-sizing: border-box; }
.sp-workspace { font-family: var(--font-base); color: var(--color-text); }
.sp-workspace button,
.sp-workspace input,
.sp-workspace textarea { font-family: inherit; }

.sp-layout {
  display: flex;
  align-items: stretch;
  min-height: calc(100vh - var(--header-height, 68px));
  background: var(--color-bg);
}

.sp-main { flex: 1; padding: 28px 32px; min-width: 0; }
.sp-main-title { font-size: .92rem; font-weight: 700; color: var(--color-text-muted); margin-bottom: 6px; word-break: break-word; }
.sp-main-sub { font-size: .8rem; color: var(--color-text-muted); opacity: .8; margin-bottom: 22px; }

/* ── Page grid ── */
.sp-page-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 14px; }
.sp-page-card {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: 14px;
  padding: 10px 10px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  cursor: pointer;
  transition: var(--transition-fast);
  position: relative;
  user-select: none;
}
.sp-page-card:hover { border-color: var(--color-border-strong, var(--color-border)); box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.sp-page-card.is-in-range,
.sp-page-card.is-selected { border-color: var(--color-primary); background: var(--color-primary-light); }

.sp-page-num-badge { position: absolute; top: 7px; left: 7px; background: var(--color-text); color: var(--color-surface); font-size: 10px; font-weight: 700; padding: 2px 6px; border-radius: 6px; }
.sp-page-check {
  position: absolute; top: 7px; right: 7px;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--color-primary); color: #fff;
  display: none; align-items: center; justify-content: center;
}
.sp-page-check svg { width: 11px; height: 11px; }
.sp-page-card.is-in-range .sp-page-check,
.sp-page-card.is-selected .sp-page-check { display: flex; }

.sp-thumb-wrap {
  width: 90px; height: 118px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.sp-thumb-wrap canvas { width: 100% !important; height: 100% !important; object-fit: contain; display: block; opacity: 0; transition: opacity .3s; }
.sp-thumb-fallback { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; color: var(--color-primary); }
.sp-thumb-fallback svg { width: 20px; height: 20px; }
.sp-thumb-label { font-size: 10px; font-weight: 800; letter-spacing: 1px; }
.sp-page-label { font-size: .7rem; font-weight: 600; color: var(--color-text-muted); }

.sp-error-main { margin-top: 14px; background: var(--color-primary-light); border: 1px solid var(--color-primary); border-radius: 10px; padding: 12px 14px; color: var(--color-primary-dark); font-size: .82rem; display: none; }

/* ── Sidebar ── */
.sp-sidebar {
  width: 420px;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}
.sp-sidebar-top { flex: 1; overflow-y: auto; padding: 26px 22px 20px; }
.sp-sidebar-title { font-size: 1.5rem; font-weight: 900; margin-bottom: 18px; }

/* ── Mode tabs ── */
.sp-mode-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 20px; }
.sp-mode-tab {
  border: 2px solid var(--color-border);
  border-radius: 14px;
  background: var(--color-surface);
  padding: 14px 8px 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  transition: var(--transition-fast);
}
.sp-mode-tab:hover { border-color: var(--color-border-strong, var(--color-border)); }
.sp-mode-tab.is-active { border-color: var(--color-primary); background: var(--color-primary-light); }
.sp-mode-tab .sp-tab-icon { color: var(--color-text-muted); }
.sp-mode-tab .sp-tab-icon svg { width: 20px; height: 20px; }
.sp-mode-tab.is-active .sp-tab-icon { color: var(--color-primary); }
.sp-mode-tab .sp-tab-label { font-size: .75rem; font-weight: 700; color: var(--color-text-muted); }
.sp-mode-tab.is-active .sp-tab-label { color: var(--color-primary); }

/* ── Panels ── */
.sp-panel { display: none; }
.sp-panel.is-active { display: block; }

.sp-setting-label { font-size: .8rem; font-weight: 700; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: .5px; margin-bottom: 10px; }

/* ── Ranges ── */
.sp-ranges-list { margin-bottom: 10px; }
.sp-range-item {
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.sp-range-item-label { font-size: .78rem; font-weight: 700; color: var(--color-text-muted); min-width: 52px; }
.sp-range-from-to { display: flex; align-items: center; gap: 6px; flex: 1; }
.sp-range-word { font-size: .72rem; color: var(--color-text-muted); font-weight: 600; }
.sp-range-num-input {
  width: 64px;
  border: 1.5px solid var(--color-border);
  border-radius: 10px;
  padding: 7px 8px;
  font-size: .85rem;
  font-weight: 700;
  text-align: center;
  outline: none;
  transition: var(--transition-fast);
  background: var(--color-surface);
  color: var(--color-text);
}
.sp-range-num-input:focus { border-color: var(--color-primary); }
.sp-range-delete {
  width: 28px; height: 28px;
  border: none;
  border-radius: 8px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition-fast);
  flex-shrink: 0;
}
.sp-range-delete svg { width: 14px; height: 14px; }
.sp-range-delete:hover { background: var(--color-primary); color: #fff; }

.sp-btn-add-range {
  width: 100%;
  border: 2px dashed var(--color-primary);
  border-radius: 12px;
  background: transparent;
  color: var(--color-primary);
  padding: 10px 0;
  font-size: .82rem;
  font-weight: 800;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: var(--transition-fast);
  margin-bottom: 14px;
}
.sp-btn-add-range svg { width: 14px; height: 14px; }
.sp-btn-add-range:hover { background: var(--color-primary-light); }

/* ── Pages panel ── */
.sp-info-box { background: var(--blue-light); border: 1px solid var(--blue); border-radius: 12px; padding: 14px; display: flex; gap: 10px; margin-bottom: 14px; }
.sp-info-box svg { width: 16px; height: 16px; color: var(--blue); flex-shrink: 0; margin-top: 2px; }
.sp-info-text { font-size: .82rem; line-height: 1.6; color: var(--blue); }
.sp-pages-textarea {
  width: 100%;
  border: 1.5px solid var(--color-border);
  border-radius: 12px;
  padding: 10px 14px;
  font-size: .88rem;
  resize: vertical;
  min-height: 80px;
  outline: none;
  transition: var(--transition-fast);
  background: var(--color-surface);
  color: var(--color-text);
}
.sp-pages-textarea:focus { border-color: var(--color-primary); }

/* ── Merge option ── */
.sp-merge-option { display: flex; align-items: center; gap: 10px; padding: 10px 0; }
.sp-merge-option input[type=checkbox] { width: 17px; height: 17px; accent-color: var(--color-primary); cursor: pointer; flex-shrink: 0; }
.sp-merge-option label { font-size: .82rem; color: var(--color-text-muted); cursor: pointer; }

/* ── Progress / success / error ── */
.sp-progress { margin-top: 18px; display: none; }
.sp-progress-bar-wrap { width: 100%; height: 8px; border-radius: 999px; background: var(--color-border); overflow: hidden; margin-bottom: 8px; }
.sp-progress-bar { height: 100%; width: 0; background: var(--color-primary); border-radius: 999px; transition: width .3s; }
.sp-progress-text { font-size: .8rem; color: var(--color-text-muted); }

.sp-success { margin-top: 18px; background: var(--color-surface); border: 1px solid var(--green); border-radius: 14px; padding: 18px; text-align: center; display: none; }
.sp-success h3 { font-size: 1.05rem; }
.sp-success-icon { width: 48px; height: 48px; border-radius: 50%; background: var(--green-light); display: flex; align-items: center; justify-content: center; margin: 0 auto 12px; color: var(--green); }
.sp-success-icon svg { width: 22px; height: 22px; }
.sp-success-desc { font-size: .85rem; color: var(--color-text-muted); margin-top: 6px; }
.sp-btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  background: var(--green);
  color: #fff;
  padding: 11px 24px;
  border-radius: 999px;
  font-weight: 700;
  font-size: .9rem;
  border: none;
  cursor: pointer;
}
.sp-btn-download svg { width: 16px; height: 16px; }
.sp-btn-again { margin-top: 12px; background: none; border: none; color: var(--color-primary); cursor: pointer; font-weight: 700; display: block; width: 100%; padding: 6px; font-size: .9rem; }

.sp-error {
  margin-top: 14px;
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary);
  border-radius: 10px;
  padding: 12px 14px;
  color: var(--color-primary-dark);
  font-size: .82rem;
  display: none;
}

/* ── Sidebar bottom ── */
.sp-sidebar-bottom { position: sticky; bottom: 0; background: var(--color-surface); border-top: 1px solid var(--color-border); padding: 18px; }
.sp-btn-split {
  width: 100%;
  height: 64px;
  border: none;
  border-radius: 18px;
  background: var(--color-primary);
  color: #fff;
  font-size: 1.15rem;
  font-weight: 900;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  transition: var(--transition-fast);
  box-shadow: 0 10px 25px rgba(229, 50, 45, .25);
}
.sp-btn-split:hover:not(:disabled) { background: var(--color-primary-dark); }
.sp-btn-split:disabled { opacity: .5; cursor: not-allowed; }
.sp-btn-split.is-download { background: var(--green); box-shadow: 0 10px 25px rgba(46, 125, 50, .25); }
.sp-btn-split.is-download:hover:not(:disabled) { filter: brightness(0.92); }
.sp-btn-icon { width: 34px; height: 34px; border-radius: 50%; background: rgba(255,255,255,.2); display: flex; align-items: center; justify-content: center; }
.sp-btn-icon svg { width: 18px; height: 18px; }
.sp-privacy-note { margin-top: 10px; text-align: center; font-size: .7rem; color: var(--color-text-muted); }
.sp-privacy-note svg { width: 12px; height: 12px; vertical-align: -2px; margin-right: 3px; }

/* ── Responsive ── */
@media (max-width: 1100px) {
  .sp-sidebar { width: 360px; }
  .sp-main { padding: 24px; }
}
@media (max-width: 768px) {
  .sp-layout { flex-direction: column; min-height: 0; }
  .sp-main { width: 100%; padding: 16px 14px 130px; }
  .sp-page-grid { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .sp-sidebar {
    position: fixed; left: 0; bottom: 0; top: auto; width: 100%; height: auto;
    border-left: none; border-top: 1px solid var(--color-border);
    z-index: 999; box-shadow: 0 -5px 20px rgba(0,0,0,.08);
  }
  .sp-sidebar-top { display: none; }
  .sp-sidebar-bottom { padding: 12px 14px calc(12px + env(safe-area-inset-bottom)); border-top: none; }
  .sp-btn-split { height: 58px; border-radius: 16px; font-size: 1rem; }
  .sp-privacy-note { display: none; }
}
@media (max-width: 480px) {
  .sp-page-grid { grid-template-columns: repeat(2, 1fr); }
  .sp-thumb-wrap { width: 80px; height: 105px; }
}