/*
 * Sift — retro-modern search engine styling.
 * System fonts, 2000s DNA, lightweight. Pure CSS, no preprocessor.
 * Light + dark themes via semantic CSS variables.
 */

* { box-sizing: border-box; }

/* --- Semantic Sift tokens (light defaults) --- */
:root {
  --sift-bg: #ffffff;
  --sift-fg: #1a1a1a;
  --sift-muted-fg: #5a5a5a;
  --sift-stat-fg: #70757a;
  --sift-snippet-fg: #4d5156;
  --sift-border: #e8e8e8;
  --sift-border-strong: #d0d0d0;
  --sift-input-bg: #ffffff;
  --sift-input-fg: #1a1a1a;
  --sift-input-placeholder: #909090;
  --sift-input-focus: #4d90fe;
  --sift-btn-bg: #f5f5f5;
  --sift-btn-fg: #444;
  --sift-btn-bg-hover: #f0f0f0;
  --sift-btn-bg-active: #e8e8e8;
  --sift-btn-border: #d0d0d0;
  --sift-tab-fg: #5a5a5a;
  --sift-tab-active-fg: #1a1a1a;
  --sift-link: #1a0dab;
  --sift-link-visited: #6b3fa0;
  --sift-url: #006621;
  --sift-image-bg: #f5f5f5;
  --sift-image-border: #e0e0e0;
  --sift-image-border-hover: #b0b0b0;
  --sift-footer-bg: #f7f7f7;
  --sift-footer-border: #e8e8e8;
  --sift-footer-fg: #70757a;
  --sift-panel-bg: #fafafa;
  --sift-skeleton-bg: #f0f0f0;
  --sift-modal-bg: rgba(0, 0, 0, 0.78);
  --sift-modal-caption: #fff;
  --sift-modal-source: #88c0ff;
  --sift-empty-fg: #5a5a5a;
  --sift-error-fg: #c0392b;
}

/* --- Semantic Sift tokens (dark overrides) --- */
.dark {
  --sift-bg: #1a1a1a;
  --sift-fg: #f5f5f5;
  --sift-muted-fg: #b0b0b0;
  --sift-stat-fg: #9aa0a6;
  --sift-snippet-fg: #c8cdd2;
  --sift-border: #2e2e2e;
  --sift-border-strong: #444;
  --sift-input-bg: #2a2a2a;
  --sift-input-fg: #f5f5f5;
  --sift-input-placeholder: #888;
  --sift-input-focus: #4d90fe;
  --sift-btn-bg: #2a2a2a;
  --sift-btn-fg: #d0d0d0;
  --sift-btn-bg-hover: #333;
  --sift-btn-bg-active: #3a3a3a;
  --sift-btn-border: #444;
  --sift-tab-fg: #b0b0b0;
  --sift-tab-active-fg: #f5f5f5;
  --sift-link: #8ab4f8;
  --sift-link-visited: #c58af9;
  --sift-url: #5fbc6b;
  --sift-image-bg: #2a2a2a;
  --sift-image-border: #3a3a3a;
  --sift-image-border-hover: #555;
  --sift-footer-bg: #222;
  --sift-footer-border: #2e2e2e;
  --sift-footer-fg: #9aa0a6;
  --sift-panel-bg: #222;
  --sift-skeleton-bg: #2e2e2e;
  --sift-modal-bg: rgba(0, 0, 0, 0.85);
  --sift-modal-caption: #fff;
  --sift-modal-source: #8ab4f8;
  --sift-empty-fg: #b0b0b0;
  --sift-error-fg: #ef9a9a;
}

body.sift-body {
  background: var(--sift-bg);
  color: var(--sift-fg);
  font-family: Verdana, Geneva, "DejaVu Sans", Arial, sans-serif;
  font-size: 13px;
  line-height: 1.4;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.15s ease, color 0.15s ease;
}

a { color: var(--sift-link); text-decoration: none; }
a:visited { color: var(--sift-link-visited); }
a:hover { text-decoration: underline; }

/* ---------- Home view ---------- */

.sift-home {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  gap: 28px;
  position: relative;
}

.sift-home-theme-toggle {
  position: absolute;
  top: 20px;
  right: 20px;
}

.sift-home-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--sift-fg);
}

.sift-logo-large {
  height: 56px;
  width: auto;
}

.sift-tagline {
  color: var(--sift-stat-fg);
  font-size: 11px;
  margin: 0;
}

.sift-home-search {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  width: 100%;
}

.sift-home-tabs {
  justify-content: center;
}

.sift-manifesto {
  color: var(--sift-stat-fg);
  font-size: 11px;
  text-align: center;
  line-height: 1.6;
  max-width: 380px;
  margin: 0;
}

/* ---------- Search box (with optional camera icon) ---------- */

.sift-search-form {
  display: flex;
  gap: 8px;
  width: 100%;
  max-width: 560px;
}

.sift-search-wrap {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 0;
}

.sift-search-box {
  width: 100%;
  background: var(--sift-input-bg);
  border: 1px solid var(--sift-border-strong);
  border-radius: 2px;
  padding: 8px 12px;
  font-size: 14px;
  font-family: inherit;
  color: var(--sift-input-fg);
  outline: none;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
  box-sizing: border-box;
}
.sift-search-box.has-leading-icon {
  padding-left: 36px;
}
.sift-search-box:focus {
  border-color: var(--sift-input-focus);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.18);
}
.sift-search-box::placeholder { color: var(--sift-input-placeholder); }

.sift-search-icon-btn {
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--sift-muted-fg);
  padding: 0;
  border-radius: 2px;
  transition: color 0.12s ease, background 0.12s ease;
}
.sift-search-icon-btn:hover {
  color: var(--sift-input-focus);
  background: rgba(77, 144, 254, 0.08);
}
.sift-search-icon-btn:focus {
  outline: 1px solid var(--sift-input-focus);
  outline-offset: 1px;
}
.sift-search-icon-btn svg {
  width: 18px;
  height: 18px;
}
.sift-file-input-hidden {
  position: absolute;
  width: 1px; height: 1px;
  opacity: 0;
  overflow: hidden;
}

/* ---------- Buttons ---------- */

.sift-btn {
  background: var(--sift-btn-bg);
  border: 1px solid var(--sift-btn-border);
  border-radius: 2px;
  padding: 8px 14px;
  font-size: 13px;
  font-family: inherit;
  color: var(--sift-btn-fg);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: background 0.12s ease, border-color 0.12s ease, color 0.12s ease;
}
.sift-btn:hover {
  background: var(--sift-btn-bg-hover);
  border-color: var(--sift-image-border-hover);
  color: var(--sift-fg);
  text-decoration: none;
}
.sift-btn:active { background: var(--sift-btn-bg-active); }
.sift-btn:focus {
  outline: 1px solid var(--sift-input-focus);
  outline-offset: 1px;
}
.sift-btn-link {
  background: none;
  border: none;
  color: var(--sift-link);
}
.sift-btn-link:hover {
  background: none;
  border: none;
  text-decoration: underline;
  color: var(--sift-link);
}

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

.sift-tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--sift-border);
  margin-bottom: 18px;
  max-width: 600px;
  flex-wrap: wrap;
}

.sift-tab {
  background: none;
  padding: 6px 12px;
  font-size: 13px;
  font-family: inherit;
  color: var(--sift-tab-fg);
  border-bottom: 3px solid transparent;
  margin-bottom: -1px;
  text-decoration: none;
  display: inline-block;
}
.sift-tab:hover {
  color: var(--sift-tab-active-fg);
  text-decoration: none;
}
.sift-tab[data-active="true"] {
  color: var(--sift-tab-active-fg);
  font-weight: bold;
  border-bottom-color: var(--sift-tab-active-fg);
}

/* ---------- Page wrapper + header ---------- */

.sift-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.sift-header {
  border-bottom: 1px solid var(--sift-border);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.sift-header .sift-logo-link {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  color: var(--sift-fg);
}

.sift-header .sift-logo-img {
  height: 26px;
  width: auto;
}

.sift-header .sift-search-form {
  flex: 1;
  min-width: 260px;
  max-width: 560px;
}

.sift-header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  margin-left: auto;
}

/* ---------- Tab bar (below header, its own row) ---------- */

.sift-tabbar {
  border-bottom: 1px solid var(--sift-border);
  background: var(--sift-bg);
}

.sift-tabbar-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  gap: 4px;
}

.sift-tabbar .sift-tab {
  border-bottom: 3px solid transparent;
  margin-bottom: -1px;
}

/* ---------- Content ---------- */

.sift-content {
  padding: 20px;
  flex: 1;
  max-width: 700px;
  width: 100%;
  margin: 0 auto;
  box-sizing: border-box;
}

.sift-content-wide {
  max-width: 980px;
}

/* ---------- Stat line ---------- */

.sift-stat {
  color: var(--sift-stat-fg);
  font-size: 12px;
  margin: 16px 0 18px 0;
  max-width: 600px;
}

/* ---------- Text results ---------- */

.sift-results { margin-top: 6px; }

.sift-result {
  margin-bottom: 18px;
  max-width: 600px;
}

.sift-result-favicon-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 1px;
}

.sift-favicon {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--sift-image-bg);
  object-fit: cover;
  flex-shrink: 0;
}

.sift-result-url {
  color: var(--sift-url);
  font-size: 13px;
  line-height: 1.4;
  word-break: break-all;
}

.sift-result-title {
  font-size: 16px;
  line-height: 1.3;
  font-weight: normal;
  margin: 0;
}
.sift-result-title a { color: var(--sift-link); text-decoration: none; }
.sift-result-title a:visited { color: var(--sift-link-visited); }
.sift-result-title a:hover { text-decoration: underline; }

.sift-result-snippet {
  color: var(--sift-snippet-fg);
  font-size: 13px;
  line-height: 1.4;
  margin-top: 2px;
  word-wrap: break-word;
}

/* ---------- Image grid ---------- */

.sift-image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
  margin-top: 6px;
}

.sift-image-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.sift-image-thumb {
  width: 100%;
  height: 150px;
  background: var(--sift-image-bg);
  border: 1px solid var(--sift-image-border);
  object-fit: cover;
  display: block;
}
.sift-image-thumb:hover { border-color: var(--sift-image-border-hover); }

.sift-image-caption {
  font-size: 11px;
  color: var(--sift-snippet-fg);
  margin-top: 4px;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sift-image-source {
  font-size: 11px;
  color: var(--sift-url);
  margin-top: 2px;
  word-break: break-all;
}

/* ---------- Video grid ---------- */

.sift-video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 6px;
}

.sift-video-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.sift-video-thumb-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--sift-image-bg);
  border: 1px solid var(--sift-image-border);
  overflow: hidden;
}
.sift-video-thumb-wrap:hover { border-color: var(--sift-image-border-hover); }

.sift-video-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.sift-video-play-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  background: rgba(0, 0, 0, 0.65);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}
.sift-video-play-overlay svg {
  width: 20px;
  height: 20px;
  fill: #fff;
  margin-left: 3px;
}

.sift-video-duration {
  position: absolute;
  bottom: 6px;
  right: 6px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  font-size: 11px;
  padding: 1px 5px;
  border-radius: 2px;
  font-family: Arial, sans-serif;
}

.sift-video-title {
  font-size: 14px;
  line-height: 1.3;
  margin: 6px 0 2px 0;
  font-weight: normal;
  color: var(--sift-link);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.sift-video-card:hover .sift-video-title { text-decoration: underline; }

.sift-video-meta {
  font-size: 11px;
  color: var(--sift-url);
  margin-top: 2px;
}

.sift-video-snippet {
  font-size: 12px;
  color: var(--sift-snippet-fg);
  margin-top: 3px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- Reverse image search panel ---------- */

.sift-reverse-panel {
  border: 1px solid var(--sift-border);
  background: var(--sift-panel-bg);
  padding: 16px;
  margin-bottom: 22px;
  border-radius: 2px;
}

.sift-reverse-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 8px;
}

.sift-reverse-help {
  color: var(--sift-stat-fg);
  font-size: 11px;
}

.sift-reverse-form {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: flex-start;
}

.sift-reverse-dropzone {
  border: 1px dashed var(--sift-border-strong);
  background: var(--sift-input-bg);
  width: 160px;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--sift-stat-fg);
  font-size: 12px;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}
.sift-reverse-dropzone.dragover {
  border-color: var(--sift-input-focus);
  background: rgba(77, 144, 254, 0.08);
}

.sift-dropzone-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  min-height: 120px;
  cursor: pointer;
}

.sift-preview-img {
  max-width: 100%;
  max-height: 140px;
  object-fit: contain;
}

.sift-reverse-url {
  flex: 1;
  min-width: 240px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sift-reverse-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.sift-reverse-privacy {
  color: var(--sift-stat-fg);
  font-size: 11px;
  margin: 4px 0 0 0;
  line-height: 1.5;
}

/* ---------- Empty / error states ---------- */

.sift-empty {
  color: var(--sift-empty-fg);
  font-size: 13px;
  text-align: center;
  padding: 40px 20px;
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.6;
}

.sift-error { color: var(--sift-error-fg); }

/* ---------- Footer ---------- */

.sift-footer {
  border-top: 1px solid var(--sift-footer-border);
  background: var(--sift-footer-bg);
  color: var(--sift-footer-fg);
  font-size: 12px;
  padding: 14px 20px;
  text-align: center;
  margin-top: auto;
}
.sift-footer a {
  color: var(--sift-link);
  margin: 0 8px;
}

/* ---------- Theme toggle button ---------- */

.sift-theme-toggle {
  background: none;
  border: 1px solid var(--sift-border-strong);
  border-radius: 2px;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--sift-muted-fg);
  padding: 0;
  flex-shrink: 0;
  transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease;
}
.sift-theme-toggle:hover {
  background: var(--sift-btn-bg-hover);
  color: var(--sift-fg);
  border-color: var(--sift-image-border-hover);
}
.sift-theme-toggle:focus {
  outline: 1px solid var(--sift-input-focus);
  outline-offset: 1px;
}
.sift-theme-toggle svg {
  width: 16px;
  height: 16px;
}
.sift-theme-toggle .sift-icon-moon { display: none; }
.sift-theme-toggle .sift-icon-sun { display: block; }
.dark .sift-theme-toggle .sift-icon-moon { display: block; }
.dark .sift-theme-toggle .sift-icon-sun { display: none; }

/* ---------- Pagination ---------- */

.sift-pagination {
  margin: 30px 0 20px 0;
  padding: 14px 0;
  border-top: 1px solid var(--sift-border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
}

.sift-page-nav {
  padding: 6px 14px;
  font-size: 13px;
  color: var(--sift-link);
  text-decoration: none;
  border: 1px solid var(--sift-border-strong);
  border-radius: 2px;
  background: var(--sift-btn-bg);
  font-family: inherit;
  cursor: pointer;
}
.sift-page-nav:hover {
  background: var(--sift-btn-bg-hover);
  text-decoration: none;
  color: var(--sift-link);
}

.sift-page-nav-disabled {
  padding: 6px 14px;
  font-size: 13px;
  color: var(--sift-stat-fg);
  border: 1px solid var(--sift-border);
  border-radius: 2px;
  background: transparent;
  cursor: default;
  opacity: 0.5;
}

.sift-page-nums {
  display: flex;
  align-items: center;
  gap: 4px;
}

.sift-page-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 30px;
  height: 30px;
  padding: 0 8px;
  font-size: 13px;
  color: var(--sift-link);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: inherit;
  cursor: pointer;
}
.sift-page-num:hover {
  background: var(--sift-btn-bg-hover);
  text-decoration: none;
  color: var(--sift-link);
}

.sift-page-num-active {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 30px;
  height: 30px;
  padding: 0 8px;
  font-size: 13px;
  font-weight: bold;
  color: var(--sift-fg);
  border: 1px solid var(--sift-border-strong);
  border-radius: 2px;
  background: var(--sift-btn-bg);
  cursor: default;
}

.sift-page-ellipsis {
  padding: 0 4px;
  color: var(--sift-stat-fg);
  font-size: 13px;
}

/* ---------- Mobile ---------- */

@media (max-width: 640px) {
  body.sift-body { font-size: 13px; }
  .sift-result, .sift-stat { max-width: 100%; }
  .sift-image-thumb { height: 120px; }
  .sift-image-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 12px;
  }
  .sift-video-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .sift-header {
    padding: 12px;
    gap: 10px;
  }
  .sift-header .sift-search-form {
    order: 3;
    width: 100%;
    max-width: none;
    flex-basis: 100%;
  }
  .sift-logo-img { height: 22px; }
  .sift-reverse-dropzone { width: 100%; }
  .sift-tabbar-inner { padding: 0 12px; }
  .sift-pagination { gap: 4px; }
  .sift-page-nav, .sift-page-nav-disabled { padding: 6px 10px; font-size: 12px; }
}