/* ═══════════════════════════════════════════════════
   Image to PDF Gallery — Frontend Styles
   ═══════════════════════════════════════════════════ */

:root {
  --itpg-primary:       #4f46e5;
  --itpg-primary-hover: #4338ca;
  --itpg-secondary:     #6b7280;
  --itpg-success:       #059669;
  --itpg-danger:        #dc2626;
  --itpg-accent:        #0ea5e9;
  --itpg-bg:            #f9fafb;
  --itpg-surface:       #ffffff;
  --itpg-border:        #e5e7eb;
  --itpg-text:          #111827;
  --itpg-text-muted:    #6b7280;
  --itpg-radius:        10px;
  --itpg-shadow:        0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --itpg-shadow-md:     0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --itpg-transition:    .2s ease;
}

/* ── App container ── */
.itpg-app {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--itpg-text);
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 0 3rem;
}

/* ── Toolbar ── */
.itpg-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.25rem 0 1rem;
  border-bottom: 2px solid var(--itpg-border);
  margin-bottom: 1.25rem;
}
.itpg-toolbar__title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--itpg-text);
}
.itpg-toolbar__actions {
  display: flex;
  gap: .625rem;
  align-items: center;
  flex-wrap: wrap;
}

/* ── Buttons ── */
.itpg-btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .55rem 1.1rem;
  border: none;
  border-radius: 8px;
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--itpg-transition), opacity var(--itpg-transition), transform var(--itpg-transition);
  line-height: 1.4;
  white-space: nowrap;
}
.itpg-btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.itpg-btn:focus-visible { outline: 2px solid var(--itpg-primary); outline-offset: 2px; }
.itpg-btn:active { transform: scale(.97); }
.itpg-btn:disabled { opacity: .45; cursor: not-allowed; pointer-events: none; }

.itpg-btn--primary   { background: var(--itpg-primary);   color: #fff; }
.itpg-btn--primary:hover { background: var(--itpg-primary-hover); color: #fff; text-decoration: none; }
.itpg-btn--secondary { background: #e5e7eb; color: var(--itpg-text); }
.itpg-btn--secondary:hover { background: #d1d5db; color: var(--itpg-text); text-decoration: none; }
.itpg-btn--success   { background: var(--itpg-success); color: #fff; }
.itpg-btn--success:hover { background: #047857; color: #fff; text-decoration: none; }
.itpg-btn--accent    { background: var(--itpg-accent); color: #fff; }
.itpg-btn--accent:hover { background: #0284c7; color: #fff; text-decoration: none; }
.itpg-btn--ghost     { background: transparent; color: var(--itpg-primary); border: 1.5px solid var(--itpg-primary); }
.itpg-btn--ghost:hover { background: #ede9fe; color: var(--itpg-primary); text-decoration: none; }
.itpg-btn--danger    { background: var(--itpg-danger); color: #fff; }
.itpg-btn--danger:hover { background: #b91c1c; color: #fff; text-decoration: none; }
.itpg-btn--sm  { font-size: .8rem; padding: .35rem .75rem; }
.itpg-btn--lg  { font-size: 1rem; padding: .75rem 1.75rem; }

/* ── File input (hidden, label is the button) ── */
.itpg-file-input { display: none !important; }

/* ── Progress bar ── */
.itpg-progress-bar {
  position: relative;
  height: 6px;
  background: var(--itpg-border);
  border-radius: 99px;
  margin-bottom: 1rem;
  overflow: hidden;
  display: none;
}
.itpg-progress-bar.is-active { display: block; }
.itpg-progress-bar__fill {
  height: 100%;
  background: var(--itpg-primary);
  width: 0%;
  transition: width .3s ease;
  border-radius: 99px;
}
.itpg-progress-bar__label {
  position: absolute;
  right: 0;
  top: 9px;
  font-size: .72rem;
  color: var(--itpg-text-muted);
}

/* ── Export bar ── */
.itpg-export-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .75rem;
  padding: .75rem 1rem;
  background: var(--itpg-bg);
  border: 1px solid var(--itpg-border);
  border-radius: var(--itpg-radius);
  margin-bottom: 1.5rem;
}
.itpg-export-bar__selection { display: flex; align-items: center; gap: .75rem; }
.itpg-selected-count { font-size: .875rem; color: var(--itpg-text-muted); font-weight: 500; }

/* ── Notifications ── */
.itpg-notifications {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  max-width: 340px;
}
.itpg-notification {
  display: flex;
  align-items: flex-start;
  gap: .625rem;
  padding: .875rem 1rem;
  background: var(--itpg-surface);
  border-left: 4px solid var(--itpg-primary);
  border-radius: 8px;
  box-shadow: var(--itpg-shadow-md);
  font-size: .875rem;
  animation: itpgSlideIn .25s ease;
  transition: opacity .3s ease;
}
.itpg-notification--success { border-color: var(--itpg-success); }
.itpg-notification--error   { border-color: var(--itpg-danger); }
.itpg-notification--warn    { border-color: #f59e0b; }
@keyframes itpgSlideIn {
  from { transform: translateX(20px); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}

/* ── Gallery grid ── */
.itpg-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 1rem;
}

/* ── Empty state ── */
.itpg-gallery__empty {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  color: var(--itpg-text-muted);
  text-align: center;
  border: 2px dashed var(--itpg-border);
  border-radius: var(--itpg-radius);
}
.itpg-gallery__empty svg { width: 56px; height: 56px; opacity: .35; margin-bottom: 1rem; }
.itpg-gallery__empty p { margin: 0; font-size: .95rem; }

/* ── Gallery card ── */
.itpg-card {
  position: relative;
  background: var(--itpg-surface);
  border-radius: var(--itpg-radius);
  border: 2px solid var(--itpg-border);
  overflow: hidden;
  box-shadow: var(--itpg-shadow);
  transition: border-color var(--itpg-transition), box-shadow var(--itpg-transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  user-select: none;
}
.itpg-card:hover   { border-color: var(--itpg-primary); box-shadow: var(--itpg-shadow-md); }
.itpg-card.selected { border-color: var(--itpg-primary); box-shadow: 0 0 0 3px rgba(79,70,229,.25); }

/* Checkbox overlay */
.itpg-card__checkbox {
  position: absolute;
  top: .5rem;
  left: .5rem;
  width: 22px;
  height: 22px;
  border: 2px solid #fff;
  border-radius: 6px;
  background: rgba(0,0,0,.35);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  transition: background var(--itpg-transition), border-color var(--itpg-transition);
}
.itpg-card.selected .itpg-card__checkbox {
  background: var(--itpg-primary);
  border-color: var(--itpg-primary);
}
.itpg-card__checkbox svg { width: 13px; height: 13px; stroke: #fff; display: none; }
.itpg-card.selected .itpg-card__checkbox svg { display: block; }

/* Method badge */
.itpg-card__method {
  position: absolute;
  top: .5rem;
  right: .5rem;
  background: rgba(0,0,0,.55);
  color: #fff;
  font-size: .65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  padding: 2px 7px;
  border-radius: 99px;
  z-index: 2;
}

/* Delete button */
.itpg-card__delete {
  position: absolute;
  bottom: .5rem;
  right: .5rem;
  background: rgba(220,38,38,.85);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 3px 7px;
  font-size: .7rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--itpg-transition);
  z-index: 3;
}
.itpg-card:hover .itpg-card__delete { opacity: 1; }

/* Image thumbnail */
.itpg-card__thumb {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}

/* Card footer */
.itpg-card__footer {
  padding: .5rem .625rem;
  background: var(--itpg-bg);
  border-top: 1px solid var(--itpg-border);
  flex: 1;
}
.itpg-card__name {
  font-size: .72rem;
  font-weight: 600;
  color: var(--itpg-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin: 0 0 2px;
}
.itpg-card__date {
  font-size: .68rem;
  color: var(--itpg-text-muted);
  margin: 0;
}

/* ── Modal ── */
.itpg-modal {
  position: fixed;
  inset: 0;
  z-index: 100000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.itpg-modal[hidden] { display: none; }
.itpg-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.6);
  backdrop-filter: blur(4px);
}
.itpg-modal__box {
  position: relative;
  background: var(--itpg-surface);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,.25);
  width: 100%;
  max-width: 680px;
  display: flex;
  flex-direction: column;
  max-height: 90vh;
  overflow: hidden;
  animation: itpgModalIn .25s ease;
}
.itpg-modal__box--sm { max-width: 420px; }
@keyframes itpgModalIn {
  from { transform: scale(.94); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}
.itpg-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem 1rem;
  border-bottom: 1px solid var(--itpg-border);
}
.itpg-modal__header h3 { margin: 0; font-size: 1.1rem; font-weight: 700; }
.itpg-modal__close {
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: var(--itpg-text-muted);
  padding: 0 .25rem;
  transition: color var(--itpg-transition);
}
.itpg-modal__close:hover { color: var(--itpg-danger); }
.itpg-modal__body {
  padding: 1.25rem 1.5rem;
  overflow-y: auto;
  flex: 1;
}
.itpg-modal__body--center {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.25rem;
}
.itpg-modal__footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--itpg-border);
  display: flex;
  gap: .75rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Camera UI ── */
.itpg-camera-wrap, .itpg-camera-preview-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
}
#itpg-video {
  width: 100%;
  max-height: 400px;
  border-radius: 10px;
  background: #000;
  display: block;
}
#itpg-camera-preview {
  width: 100%;
  max-height: 400px;
  border-radius: 10px;
  object-fit: contain;
  background: #f3f4f6;
}

/* ── PDF success icon ── */
.itpg-success-icon {
  width: 72px;
  height: 72px;
  color: var(--itpg-success);
}

/* ── Notice (login prompt) ── */
.itpg-notice {
  padding: 1.25rem 1.5rem;
  border-radius: var(--itpg-radius);
  border-left: 4px solid var(--itpg-secondary);
  background: var(--itpg-bg);
}
.itpg-notice--warn { border-color: #f59e0b; }
.itpg-notice p { margin: 0 0 .75rem; }
.itpg-notice p:last-child { margin-bottom: 0; }

/* ── Loading spinner overlay on card ── */
.itpg-card.is-uploading::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,.7);
  z-index: 10;
}
.itpg-card.is-uploading::before {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  width: 32px; height: 32px;
  margin: -16px 0 0 -16px;
  border: 3px solid var(--itpg-border);
  border-top-color: var(--itpg-primary);
  border-radius: 50%;
  animation: itpgSpin .7s linear infinite;
  z-index: 11;
}
@keyframes itpgSpin { to { transform: rotate(360deg); } }

/* ── Drag-over visual ── */
.itpg-app.drag-over .itpg-gallery {
  outline: 3px dashed var(--itpg-primary);
  outline-offset: 6px;
  border-radius: var(--itpg-radius);
}

/* ── Responsive ── */
@media (max-width: 480px) {
  .itpg-gallery { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
  .itpg-toolbar { flex-direction: column; align-items: flex-start; }
  .itpg-toolbar__actions { width: 100%; }
  .itpg-btn { flex: 1; justify-content: center; }
}