/* ============================================
   Pixia - Lock PDF studio (lock.html)
   Complements css/ai-tool.css (.at-* primitives)
   Scope: body.at-lock
   ============================================ */

body.at-lock {
  --lk-accent: var(--accent-primary);
  --lk-accent-2: var(--accent-primary);
  --lk-ink: var(--text-primary);
  --lk-line: var(--glass-border);
}

/* The app toggles visibility via the hidden attribute on elements that also
   set display explicitly, so make hidden authoritative inside the tool. */
body.at-lock [hidden] { display: none !important; }

/* ---------- Layout ---------- */
.lk-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 22px;
  align-items: start;
}

.lk-main {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.lk-side {
  min-width: 0;
  position: sticky;
  inset-block-start: 84px;
  display: grid;
  gap: 16px;
}

@media (max-width: 1060px) {
  .lk-layout { grid-template-columns: 1fr; }
  .lk-side { position: static; }
}

body.at-lock .lk-side .at-panel + .at-panel { margin-block-start: 0; }
body.at-lock .at-panel { min-height: 0; min-width: 0; }

.lk-panel h2 {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-block-end: 2px;
}

.lk-panel h2 .lk-count {
  margin-inline-start: auto;
  font-family: var(--font-primary);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-tertiary);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 3px 10px;
}

.lk-panel-hint {
  margin: 0 0 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-tertiary);
}

/* ---------- Source files ---------- */
.lk-source { display: grid; gap: 12px; }

.lk-drop {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  padding: 34px 20px;
  border: 1.6px dashed var(--glass-border-hover);
  border-radius: var(--at-radius-lg);
  background: var(--glass-bg);
  cursor: pointer;
  transition: border-color .2s var(--at-ease), background .2s var(--at-ease), transform .2s var(--at-ease);
}
.lk-drop:hover { border-color: var(--lk-accent); }
.lk-drop.drag {
  border-color: var(--lk-accent);
  background: color-mix(in srgb, var(--lk-accent) 10%, var(--glass-bg));
  transform: scale(1.006);
}
.lk-drop input { display: none; }
.lk-drop-icon {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border-radius: 16px;
  background: color-mix(in srgb, var(--lk-accent) 16%, transparent);
  color: var(--lk-accent);
  margin-block-end: 2px;
}
.lk-drop-icon svg { width: 26px; height: 26px; }
.lk-drop-title { font-family: var(--font-display); font-size: 1.02rem; font-weight: 600; color: var(--text-primary); }
.lk-drop-sub { font-size: 13px; color: var(--text-tertiary); }
.lk-drop-meta { display: flex; gap: 8px; margin-block-start: 4px; }
.lk-drop-meta span {
  font-size: 11px; font-weight: 600;
  color: var(--text-tertiary);
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 3px 10px;
}

.lk-files { display: none; gap: 8px; }
.lk-files[data-has="1"] { display: grid; }

.lk-file-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--glass-border);
  border-radius: var(--at-radius-md);
  background: var(--glass-bg);
  margin-top: 10px;
}
.lk-file-thumb {
  width: 40px; height: 52px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--glass-border);
  background: var(--bg-secondary);
  display: grid; place-items: center;
  color: var(--text-tertiary);
}
.lk-file-thumb img { width: 100%; height: 100%; object-fit: cover; }
.lk-file-thumb svg { width: 18px; height: 18px; }
.lk-file-info { min-width: 0; display: grid; gap: 3px; }
.lk-file-name {
  font-size: 13.5px; font-weight: 600; color: var(--text-primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.lk-file-meta {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--text-tertiary);
}
.lk-file-status { font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 999px; }
.lk-file-status.is-error { color: #dc2626; background: color-mix(in srgb, #ef4444 14%, transparent); }
.lk-file-status.is-ready { color: #16a34a; background: color-mix(in srgb, #22c55e 16%, transparent); }
.lk-file-status.is-reading { color: var(--text-tertiary); background: var(--bg-secondary); }
.lk-icon-btn {
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  background: var(--glass-bg);
  color: var(--text-tertiary);
  cursor: pointer;
  transition: color .2s var(--at-ease), border-color .2s var(--at-ease), background .2s var(--at-ease);
}
.lk-icon-btn:hover { color: #dc2626; border-color: color-mix(in srgb, #ef4444 45%, var(--glass-border)); background: color-mix(in srgb, #ef4444 8%, transparent); }
.lk-icon-btn svg { width: 16px; height: 16px; }

.lk-add-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: auto;
  height: auto;
  min-height: 34px;
  padding: 0 14px;
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  background: var(--glass-bg);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: color .2s var(--at-ease), border-color .2s var(--at-ease), background .2s var(--at-ease);
  margin-top: 20px;
}
.lk-add-btn:hover { color: var(--text-primary); border-color: var(--lk-accent); }
.lk-add-btn svg { width: 16px; height: 16px; flex: 0 0 auto; }
.lk-add-btn span { white-space: nowrap; }

/* ---------- Page-grid preview ---------- */
.lk-page-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(104px, 1fr));
  gap: 10px;
  max-height: 430px;
  overflow: auto;
  padding-block-end: 4px;
}
.lk-page {
  position: relative;
  width: auto;
  aspect-ratio: 3 / 4;
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  background: var(--bg-secondary);
  overflow: hidden;
}
.lk-page canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #fff;
}
.lk-page-num {
  position: absolute;
  inset-block-start: 4px;
  inset-inline-start: 4px;
  min-width: 18px;
  height: 18px;
  display: grid;
  place-items: center;
  padding: 0 4px;
  font-size: 10.5px;
  font-weight: 700;
  color: var(--text-primary);
  background: rgba(255, 255, 255, .92);
  border-radius: 6px;
}

/* ---------- Fields & inputs ---------- */
.lk-field { margin-block-end: 16px; }
.lk-field:last-child { margin-block-end: 2px; }
.lk-field > label {
  display: block;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: .01em;
  color: var(--text-secondary);
  margin-block-end: 8px;
}

.lk-input, .lk-select {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--at-radius-md);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  transition: border-color .2s var(--at-ease), box-shadow .2s var(--at-ease);
  box-sizing: border-box;
}
.lk-input:focus, .lk-select:focus {
  outline: none;
  border-color: var(--lk-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--lk-accent) 20%, transparent);
}
.lk-input::placeholder { color: var(--text-tertiary); }

.lk-row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* password input with reveal toggle */
.lk-pw-wrap { position: relative; }
.lk-pw-wrap .lk-input { padding-inline-end: 44px; }
.lk-pw-toggle {
  position: absolute;
  inset-inline-end: 6px;
  inset-block-start: 50%;
  transform: translateY(-50%);
  width: 32px; height: 32px;
  display: grid; place-items: center;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: color .18s var(--at-ease), background .18s var(--at-ease);
}
.lk-pw-toggle:hover { color: var(--text-primary); background: color-mix(in srgb, var(--lk-accent) 12%, transparent); }
.lk-pw-toggle svg { width: 17px; height: 17px; }
.lk-pw-toggle .lk-eye-off { display: none; }
.lk-pw-toggle.is-on .lk-eye-on { display: none; }
.lk-pw-toggle.is-on .lk-eye-off { display: block; }

/* password strength meter */
.lk-pw-meter { margin-block-start: 8px; display: grid; gap: 6px; }
.lk-pw-meter-track {
  height: 6px;
  border-radius: 999px;
  background: var(--bg-secondary);
  overflow: hidden;
}
.lk-pw-meter-fill {
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: var(--text-tertiary);
  transition: width .25s var(--at-ease), background .25s var(--at-ease);
}
.lk-pw-meter[data-tier="weak"] .lk-pw-meter-fill { width: 25%; background: #ef4444; }
.lk-pw-meter[data-tier="fair"] .lk-pw-meter-fill { width: 50%; background: #f59e0b; }
.lk-pw-meter[data-tier="good"] .lk-pw-meter-fill { width: 75%; background: #22c55e; }
.lk-pw-meter[data-tier="strong"] .lk-pw-meter-fill { width: 100%; background: #16a34a; }
.lk-pw-meter-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 11.5px;
  color: var(--text-tertiary);
}
.lk-pw-meter-label { font-weight: 650; }
.lk-pw-meter[data-tier="weak"] .lk-pw-meter-label { color: #ef4444; }
.lk-pw-meter[data-tier="fair"] .lk-pw-meter-label { color: #f59e0b; }
.lk-pw-meter[data-tier="good"] .lk-pw-meter-label { color: #22c55e; }
.lk-pw-meter[data-tier="strong"] .lk-pw-meter-label { color: #16a34a; }

.lk-pw-hint { font-size: 11.5px; line-height: 1.5; margin-block-start: 6px; color: var(--text-tertiary); }
.lk-pw-hint.is-ok { color: #16a34a; }
.lk-pw-hint.is-bad { color: #dc2626; }

/* ---------- Security / encryption badge ---------- */
.lk-sec {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--at-radius-md);
  border: 1px solid color-mix(in srgb, var(--lk-accent) 34%, var(--glass-border));
  background: color-mix(in srgb, var(--lk-accent) 8%, var(--glass-bg));
  margin-block-end: 16px;
}
.lk-sec-icon {
  width: 38px; height: 38px;
  flex: 0 0 auto;
  display: grid; place-items: center;
  border-radius: 11px;
  background: color-mix(in srgb, var(--lk-accent) 16%, transparent);
  color: var(--lk-accent);
}
.lk-sec-icon svg { width: 20px; height: 20px; }
.lk-sec-body { min-width: 0; display: grid; gap: 2px; }
.lk-sec-title { font-size: 13px; font-weight: 700; color: var(--text-primary); }
.lk-sec-desc { font-size: 11.5px; line-height: 1.5; color: var(--text-tertiary); }

/* ---------- Segmented controls ---------- */
.lk-seg {
  display: inline-flex;
  gap: 4px;
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--at-radius-md);
  padding: 3px;
}
.lk-seg button {
  border: 0;
  background: transparent;
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-tertiary);
  padding: 6px 13px;
  border-radius: 9px;
  cursor: pointer;
  transition: all .2s var(--at-ease);
  white-space: nowrap;
}
.lk-seg button:hover { color: var(--text-primary); }
.lk-seg button.active { background: var(--lk-accent); color: #1b1408; }

.lk-seg-block { display: grid; grid-template-columns: 1fr 1fr; width: 100%; margin-block-start: 10px; }
.lk-seg-block button { text-align: center; }
.lk-seg-3 { grid-template-columns: repeat(3, 1fr); display: grid; width: 100%; margin-block-start: 10px; }
.lk-seg-3 button { text-align: center; }

/* ---------- Checkbox rows ---------- */
.lk-group { display: grid; gap: 12px; }
.lk-group[hidden] { display: none !important; }
.lk-group-title {
  display: block;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: .01em;
  color: var(--text-secondary);
}

.lk-check, .lk-check-inline {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--glass-border);
  border-radius: var(--at-radius-md);
  background: var(--glass-bg);
  cursor: pointer;
  user-select: none;
  transition: border-color .18s var(--at-ease), background .18s var(--at-ease);
}
.lk-check:hover, .lk-check-inline:hover { border-color: var(--lk-accent); }
.lk-check input, .lk-check-inline input {
  width: 17px; height: 17px;
  flex: 0 0 auto;
  accent-color: var(--lk-accent);
  cursor: pointer;
}
.lk-check-text { display: grid; gap: 2px; min-width: 0; }
.lk-check-title { font-size: 13px; font-weight: 600; color: var(--text-primary); }
.lk-check-desc { font-size: 11.5px; line-height: 1.45; color: var(--text-tertiary); }

/* switch variants */
.lk-switch input {
  position: absolute;
  width: 1px; height: 1px;
  opacity: 0;
  pointer-events: none;
}
.lk-switch i {
  position: relative;
  width: 38px;
  height: 22px;
  flex: 0 0 auto;
  border-radius: 999px;
  background: var(--glass-border);
  transition: background .18s var(--at-ease);
}
.lk-switch i::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,.3);
  transition: transform .18s var(--at-ease);
}
.lk-switch input:checked + i { background: var(--lk-accent); }
.lk-switch input:checked + i::after { transform: translateX(16px); }
[dir="rtl"] .lk-switch input:checked + i::after { transform: translateX(-16px); }
.lk-switch input:focus-visible + i { outline: 2px solid var(--lk-accent); outline-offset: 2px; }
.lk-switch input:disabled + i { opacity: .45; }
.lk-switch input:disabled ~ span { opacity: .6; }

/* advanced section divider */
.lk-advanced {
  margin-block-start: 16px;
  padding-block-start: 15px;
  border-block-start: 1px solid var(--glass-border);
}
.lk-advanced-label {
  display: block;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: .01em;
  color: var(--text-secondary);
  margin-block-end: 10px;
}

/* ---------- Run / progress ---------- */
.lk-run-panel .lk-run-btn { width: 100%; }
.lk-run-actions { display: grid; gap: 9px; }
.lk-progress {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--glass-border);
  border-radius: var(--at-radius-md);
  background: var(--glass-bg);
}
.lk-progress.show { display: flex; }
.lk-progress-track {
  position: relative;
  flex: 1 1 auto;
  height: 8px;
  border-radius: 999px;
  background: var(--bg-secondary);
  overflow: hidden;
}
.lk-progress-fill {
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: var(--lk-accent);
  transition: width .25s var(--at-ease);
}
.lk-progress-msg {
  flex: 0 0 auto;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}
.lk-cancel {
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: var(--at-radius-md);
  cursor: pointer;
  transition: all .2s var(--at-ease);
}
.lk-cancel:hover:not([disabled]) { color: var(--text-primary); border-color: var(--lk-accent); }

.lk-reset-btn { width: 100%; }
.lk-caption { font-size: 11.5px; color: var(--text-tertiary); line-height: 1.6; margin-block-start: 10px; }

/* ---------- Result ---------- */
.lk-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  padding: 16px;
  border-radius: var(--at-radius-lg);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  margin-block-end: 12px;
}
.lk-summary-main { display: flex; align-items: baseline; gap: 8px; }
.lk-summary-pct {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: #16a34a;
  font-variant-numeric: tabular-nums;
}
.lk-summary-label { font-size: 13px; font-weight: 600; color: var(--text-tertiary); }
.lk-summary-meta { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600; }

.lk-result-list { display: grid; gap: 8px; }
.lk-result-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 11px 12px;
  border: 1px solid var(--glass-border);
  border-radius: var(--at-radius-md);
  background: var(--glass-bg);
}
.lk-result-info { min-width: 0; display: grid; gap: 5px; }
.lk-result-name {
  font-size: 13px; font-weight: 600; color: var(--text-primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.lk-result-sizes { display: flex; align-items: center; gap: 7px; font-size: 12px; color: var(--text-tertiary); flex-wrap: wrap; }
.lk-size-new { color: var(--text-primary); font-weight: 650; }
.lk-arrow { color: var(--text-tertiary); }
.lk-badge { font-size: 10.5px; font-weight: 700; padding: 2px 8px; border-radius: 999px; white-space: nowrap; }
.lk-badge-ok { color: #16a34a; background: color-mix(in srgb, #22c55e 16%, transparent); }
.lk-badge-info { color: var(--lk-accent); background: color-mix(in srgb, var(--lk-accent) 14%, transparent); }
.lk-icon-btn-dl { text-decoration: none; color: var(--lk-accent); }
.lk-icon-btn-dl:hover { color: var(--lk-accent); border-color: var(--lk-accent); background: color-mix(in srgb, var(--lk-accent) 10%, transparent); }
.lk-result-actions { margin-block-start: 14px; display: grid; gap: 9px; }

/* ---------- misc ---------- */
.lk-muted { color: var(--text-tertiary); }
.lk-inline-flex { display: inline-flex; align-items: center; gap: 6px; }

@keyframes lk-spin { to { transform: rotate(360deg); } }
.lk-spinner {
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 3px solid var(--glass-border);
  border-block-start-color: var(--lk-accent);
  animation: lk-spin .8s linear infinite;
}

@media (max-width: 620px) {
  .lk-row2 { grid-template-columns: 1fr; }
  .lk-seg-block, .lk-seg-3 { grid-template-columns: 1fr; }
}