/*
 * Shared image-picker modal styles. Scoped under .sei-picker so they
 * don't bleed into host pages. Tokens fall back to literals when the
 * host page doesn't define the seminar-engine palette.
 */

/* ---------- Dialog container ---------------------------------------------------------------- */

dialog.sei-picker {
  padding: 0;
  border: none;
  border-radius: 12px;
  width: min(900px, calc(100vw - 32px));
  max-height: calc(100vh - 64px);
  background: var(--surface, #ffffff);
  color: var(--ink, #172033);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.25);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 14px;
  line-height: 1.4;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

dialog.sei-picker::backdrop {
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(2px);
}

/* Old-browser polyfill mode (no <dialog> support). */
.sei-picker.sei-picker--no-native {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 9999;
}

/* ---------- Header ------------------------------------------------------------------------- */

.sei-picker__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line, #e2e8f0);
  background: var(--bg, #f8fafc);
}

.sei-picker__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink, #172033);
  letter-spacing: -0.01em;
}

.sei-picker__close {
  background: transparent;
  border: none;
  font-size: 22px;
  line-height: 1;
  color: var(--ink-soft, #94a3b8);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  font-family: inherit;
}
.sei-picker__close:hover {
  color: var(--ink, #172033);
  background: var(--line-soft, #f1f5f9);
}

/* ---------- Tabs --------------------------------------------------------------------------- */

.sei-picker__tabs {
  display: flex;
  gap: 0;
  padding: 0 12px;
  border-bottom: 1px solid var(--line, #e2e8f0);
  background: var(--surface, #ffffff);
  flex-shrink: 0;
}

.sei-picker__tab {
  background: transparent;
  border: none;
  padding: 12px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-soft, #64748b);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  font-family: inherit;
  transition: color 120ms, border-color 120ms;
}
.sei-picker__tab:hover {
  color: var(--ink, #172033);
}
.sei-picker__tab.is-active {
  color: var(--acc, #2563eb);
  border-bottom-color: var(--acc, #2563eb);
}

/* ---------- Body --------------------------------------------------------------------------- */

.sei-picker__body {
  flex: 1;
  overflow-y: auto;
  padding: 18px;
  min-height: 240px;
  background: var(--surface, #ffffff);
}

/* ---------- Loading / empty / error ------------------------------------------------------- */

.sei-picker__loading,
.sei-picker__empty {
  text-align: center;
  padding: 48px 16px;
  color: var(--ink-soft, #64748b);
}
.sei-picker__empty h3 {
  margin: 0 0 6px 0;
  font-size: 15px;
  color: var(--ink, #172033);
}
.sei-picker__empty p {
  margin: 0;
  font-size: 13px;
}

.sei-picker__error {
  background: var(--negative-soft, #fef2f2);
  color: var(--negative, #b42318);
  border: 1px solid var(--negative, #b42318);
  border-radius: 6px;
  padding: 12px 14px;
  font-size: 13px;
}

/* ---------- Library grid ------------------------------------------------------------------ */

.sei-picker__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
@media (min-width: 600px) { .sei-picker__grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
@media (min-width: 800px) { .sei-picker__grid { grid-template-columns: repeat(5, minmax(0, 1fr)); } }
@media (min-width: 1024px) { .sei-picker__grid { grid-template-columns: repeat(6, minmax(0, 1fr)); } }

.sei-picker__thumb {
  position: relative;
  background: var(--bg, #f8fafc);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: 6px;
  padding: 0;
  cursor: pointer;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  font-family: inherit;
  text-align: left;
  transition: border-color 120ms, transform 80ms;
}
.sei-picker__thumb:hover {
  border-color: var(--ink-soft, #94a3b8);
}
.sei-picker__thumb:focus-visible {
  outline: 2px solid var(--acc, #2563eb);
  outline-offset: 2px;
}
.sei-picker__thumb.is-selected {
  outline: 3px solid var(--acc, #2563eb);
  outline-offset: -3px;
}
.sei-picker__thumb.is-current {
  outline: 3px solid var(--acc-deep, #1d4ed8);
  outline-offset: -3px;
}

.sei-picker__thumb img {
  width: 100%;
  height: 100px;
  object-fit: cover;
  display: block;
  background: var(--line-soft, #f1f5f9);
}

.sei-picker__thumb-broken {
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--negative, #b42318);
  background: var(--negative-soft, #fef2f2);
}

.sei-picker__thumb-meta {
  display: flex;
  gap: 6px;
  padding: 6px 8px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-soft, #64748b);
  background: var(--surface, #ffffff);
  border-top: 1px solid var(--line, #e2e8f0);
}
.sei-picker__thumb-kind {
  font-weight: 600;
}
.sei-picker__thumb-source {
  opacity: 0.7;
}

/* ---------- Upload tab -------------------------------------------------------------------- */

.sei-picker__dropzone {
  border: 2px dashed var(--line, #cbd5e1);
  border-radius: 10px;
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  background: var(--bg, #f8fafc);
  transition: border-color 120ms, background 120ms;
}
.sei-picker__dropzone:hover,
.sei-picker__dropzone:focus-visible {
  border-color: var(--acc, #2563eb);
  background: var(--acc-soft, #eff6ff);
  outline: none;
}
.sei-picker__dropzone.is-dragover {
  border-color: var(--acc, #2563eb);
  background: var(--acc-soft, #eff6ff);
}

.sei-picker__dropzone-icon {
  font-size: 32px;
  color: var(--ink-soft, #94a3b8);
  margin-bottom: 8px;
}
.sei-picker__dropzone-primary {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink, #172033);
  margin-bottom: 4px;
}
.sei-picker__dropzone-secondary {
  font-size: 12px;
  color: var(--ink-soft, #64748b);
}

.sei-picker__file-input {
  display: none;
}

.sei-picker__upload-status {
  margin-top: 14px;
  min-height: 24px;
}
.sei-picker__upload-progress {
  font-size: 13px;
  color: var(--ink-soft, #64748b);
}
.sei-picker__upload-ok {
  font-size: 13px;
  color: var(--positive, #0f766e);
  background: var(--positive-soft, #ecfdf5);
  border: 1px solid var(--positive, #0f766e);
  border-radius: 6px;
  padding: 10px 12px;
}
.sei-picker__upload-err {
  font-size: 13px;
  color: var(--negative, #b42318);
  background: var(--negative-soft, #fef2f2);
  border: 1px solid var(--negative, #b42318);
  border-radius: 6px;
  padding: 10px 12px;
}

/* ---------- Generate tab (M5 stub) -------------------------------------------------------- */

.sei-picker__generate {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 540px;
  margin: 0 auto;
}
.sei-picker__generate-prompt {
  width: 100%;
  font-family: inherit;
  font-size: 13px;
  padding: 10px;
  border-radius: 6px;
  border: 1px solid var(--line, #e2e8f0);
  background: var(--bg, #f8fafc);
  color: var(--ink, #172033);
  resize: vertical;
}
.sei-picker__generate-prompt:disabled {
  cursor: not-allowed;
  opacity: 0.75;
}
.sei-picker__generate-help {
  margin: 0;
  font-size: 12px;
  color: var(--ink-soft, #64748b);
  line-height: 1.5;
}

/* ---------- Buttons + selection bar ------------------------------------------------------- */

.sei-picker__btn {
  background: var(--surface, #ffffff);
  color: var(--ink, #172033);
  border: 1px solid var(--line, #cbd5e1);
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  transition: background 120ms, border-color 120ms;
}
.sei-picker__btn:hover:not(:disabled) {
  border-color: var(--ink-soft, #94a3b8);
}
.sei-picker__btn:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}
.sei-picker__btn.primary {
  background: var(--acc, #2563eb);
  color: #ffffff;
  border-color: var(--acc, #2563eb);
}
.sei-picker__btn.primary:hover:not(:disabled) {
  background: var(--acc-deep, #1d4ed8);
  border-color: var(--acc-deep, #1d4ed8);
}

.sei-picker__selection-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  border-top: 1px solid var(--line, #e2e8f0);
  background: var(--bg, #f8fafc);
  flex-shrink: 0;
}
.sei-picker__selection-bar[hidden] {
  display: none;
}
.sei-picker__selection-count {
  font-size: 13px;
  color: var(--ink-soft, #64748b);
  font-weight: 500;
}