:root {
  --bg: #f4f6fb;
  --panel: #ffffff;
  --ink: #14181f;
  --ink-soft: #5b6472;
  --line: #e3e8f0;
  --brand: #2f6bff;
  --brand-dark: #1f4fd6;
  --brand-soft: #eaf0ff;
  --ok: #128a4a;
  --ok-soft: #e4f6ec;
  --warn: #b25e00;
  --danger: #c0392b;
  --chip: #eef1f7;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(20, 30, 60, .08), 0 6px 20px rgba(20, 30, 60, .05);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.45;
}

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  background: linear-gradient(120deg, var(--brand) 0%, var(--brand-dark) 100%);
  border-bottom: 1px solid var(--brand-dark);
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; }
.logo { display: inline-flex; color: #fff; }
.logo svg { width: 30px; height: 30px; display: block; }
.brand-name { font-weight: 800; font-size: 20px; letter-spacing: -.02em; color: #fff; }
.privacy-badge {
  background: rgba(255, 255, 255, .16);
  color: #fff;
  font-weight: 600;
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 999px;
}

/* ---------- Layout ---------- */
.layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 18px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px;
}

/* ---------- Sidebar ---------- */
.sidebar {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 10px;
  box-shadow: var(--shadow);
  position: sticky;
  top: 18px;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 36px);
}
.sidebar-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--ink-soft);
  padding: 0 8px 8px;
}

/* Search box pinned at top of the nav */
.tool-search {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 14px;
  background: #fff;
  color: var(--ink);
  margin-bottom: 8px;
  flex: 0 0 auto;
}
.tool-search:focus { outline: none; border-color: var(--brand); }

/* Scrollable grouped list below the search box */
.tool-list {
  overflow-y: auto;
  min-height: 0;
  flex: 1;
}
.tool-cat {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--ink-soft);
  font-weight: 700;
  padding: 10px 8px 4px;
}
.tool-cat:first-child { padding-top: 2px; }
.tool-noresults { color: var(--ink-soft); font-size: 13px; padding: 8px; }
.tool-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  border: none;
  background: transparent;
  color: var(--ink);
  padding: 10px 10px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  text-align: left;
}
.tool-btn:hover { background: var(--chip); }
.tool-btn.active { background: var(--brand-soft); color: var(--brand-dark); }
.tool-btn .t-icon { font-size: 18px; }

/* ---------- Workspace ---------- */
.workspace { min-width: 0; }

.dropzone {
  border: 2px dashed #c3ccdd;
  border-radius: var(--radius);
  background: var(--panel);
  padding: 26px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  outline: none;
}
.dropzone:hover, .dropzone:focus { border-color: var(--brand); background: #fbfcff; }
.dropzone.dragging { border-color: var(--brand); background: var(--brand-soft); }
.dropzone-icon { font-size: 30px; }
.dropzone-title { font-weight: 700; font-size: 18px; margin-top: 4px; }
.dropzone-sub { color: var(--ink-soft); font-size: 14px; margin-top: 2px; }
.dropzone .link { color: var(--brand); font-weight: 600; }

.workspace-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 18px;
}

.store-panel, .tool-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px;
  min-width: 0;
}
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  margin-bottom: 12px;
}
.panel-head .count { color: var(--ink-soft); font-weight: 500; }

/* ---------- Store / image cards ---------- */
.store-empty { color: var(--ink-soft); font-size: 14px; padding: 8px 2px; }
.store-list { display: flex; flex-direction: column; gap: 12px; }

.img-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  display: flex;
  gap: 12px;
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s;
}
.img-card:hover { border-color: #c3ccdd; }
.img-card.selected { border-color: var(--brand); box-shadow: 0 0 0 1px var(--brand); }
.img-thumb {
  width: 68px; height: 68px;
  border-radius: 8px;
  object-fit: cover;
  background: #eef1f7;
  flex: 0 0 auto;
}
.img-meta { min-width: 0; flex: 1; }
.img-name {
  font-weight: 600;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.img-size { font-size: 13px; color: var(--ink-soft); margin-top: 2px; }
.img-size .delta-down { color: var(--ok); font-weight: 600; }
.img-size .delta-up { color: var(--warn); font-weight: 600; }

.chips { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 7px; }
.chip {
  background: var(--chip);
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
}
.chip.op { background: var(--brand-soft); color: var(--brand-dark); }

.card-actions { display: flex; gap: 8px; margin-top: 9px; flex-wrap: wrap; }
.mini-btn {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 7px;
  padding: 4px 9px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  color: var(--ink);
}
.mini-btn:hover { background: var(--chip); }
.mini-btn.danger { color: var(--danger); border-color: #f0c9c4; }
.mini-btn.primary { color: #fff; background: var(--brand); border-color: var(--brand); }
.mini-btn.primary:hover { background: var(--brand-dark); }

/* ---------- Tool controls ---------- */
.tool-hint { color: var(--ink-soft); font-size: 14px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

input[type="range"] { width: 100%; accent-color: var(--brand); }
input[type="number"], input[type="text"], select {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 14px;
  width: 100%;
  background: #fff;
  color: var(--ink);
}
input[type="number"] { width: 100px; }

.seg { display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg button {
  flex: 1; border: none; background: #fff; padding: 8px 10px;
  font-weight: 600; font-size: 13px; cursor: pointer; color: var(--ink-soft);
}
.seg button.active { background: var(--brand); color: #fff; }

.presets { display: flex; gap: 8px; flex-wrap: wrap; }
.preset-btn {
  border: 1px solid var(--line); background: #fff; border-radius: 8px;
  padding: 6px 12px; font-weight: 600; font-size: 13px; cursor: pointer; color: var(--ink);
}
.preset-btn:hover { border-color: var(--brand); color: var(--brand); }

.check { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 14px; cursor: pointer; }
.check input { width: auto; accent-color: var(--brand); }

.value-tag { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--brand-dark); }

.apply-bar { display: flex; gap: 10px; align-items: center; margin-top: 8px; flex-wrap: wrap; }
.btn {
  border: none; border-radius: 9px; padding: 10px 18px;
  font-weight: 700; font-size: 15px; cursor: pointer;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-primary:disabled { background: #9db6ff; cursor: not-allowed; }
.btn-ghost {
  background: transparent; border: 1px solid var(--line);
  border-radius: 8px; padding: 5px 10px; font-weight: 600; font-size: 13px;
  cursor: pointer; color: var(--ink-soft);
}
.btn-ghost:hover { background: var(--chip); }

.result-note {
  font-size: 13px; padding: 8px 10px; border-radius: 8px; margin-top: 4px;
}
.result-note.ok { background: var(--ok-soft); color: var(--ok); }
.result-note.warn { background: #fff3e0; color: var(--warn); }

.scope-note { font-size: 13px; color: var(--ink-soft); margin-bottom: 12px; }
.scope-note b { color: var(--ink); }

/* ---------- Footer ---------- */
.footer {
  text-align: center;
  color: var(--ink-soft);
  font-size: 13px;
  padding: 22px;
}

/* ---------- Responsive / mobile ---------- */
@media (max-width: 820px) {
  .layout { grid-template-columns: 1fr; }
  /* Mobile: not sticky/full-height; search box + capped scrollable list. */
  .sidebar {
    position: static;
    max-height: none;
  }
  .sidebar-title { display: none; }
  /* Same grouped vertical list; cap height so it doesn't push content away. */
  .tool-list {
    max-height: 45vh;
    -webkit-overflow-scrolling: touch;
  }
  .tool-btn {
    width: 100%;
    padding: 12px 12px; /* comfortable tap target */
    font-size: 16px;
  }
  .tool-search { font-size: 16px; padding: 10px 12px; } /* 16px avoids iOS zoom */
  .workspace-cols { grid-template-columns: 1fr; }
  .privacy-badge { font-size: 12px; }
}