/* ============================================================
   LLL Tools — shared brand styles
   Edit palette / logo here once; every tool inherits it.
   ============================================================ */
:root {
  --bg: #f3f3f2;
  --surface: #ffffff;
  --ink: #222220;
  --muted: #6f6f6a;
  --border: #e3e3e0;
  --accent: #222220;
  --accent-tint: #ececea;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
          "Hiragino Sans", "Noto Sans CJK JP", "Noto Sans KR", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

/* ---------- Language switcher ---------- */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 6px 8px 6px 10px;
}
.lang-switch svg { color: var(--muted); flex: none; }
.lang-switch select {
  border: none;
  background: transparent;
  font-family: var(--sans);
  font-size: 14px;
  color: var(--ink);
  cursor: pointer;
}
.lang-switch:focus-within { outline: 3px solid var(--accent); outline-offset: 2px; }

/* fixed position variant used on tool upload screens */
.lang-switch.fixed {
  position: absolute;
  top: max(16px, env(safe-area-inset-top));
  right: 16px;
}

/* ---------- Brand lockup ---------- */
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo { flex: none; line-height: 0; }
.brand-logo img { display: block; height: 36px; width: auto; }
.brand-name {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  padding-left: 12px;
  border-left: 1px solid var(--border);
}

/* ---------- Buttons ---------- */
.btn {
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 10px;
  padding: 12px 22px;
  min-height: 46px;
  cursor: pointer;
  transition: filter .15s ease;
}
.btn:hover { filter: brightness(1.35); }
.btn:active { filter: brightness(0.9); }

/* ---------- Upload screen (shared by tools) ---------- */
.uploader {
  position: relative;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  gap: 28px;
}
.dropzone {
  width: 100%;
  max-width: 440px;
  background: var(--surface);
  border: 2px dashed var(--border);
  border-radius: 16px;
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s ease, background .15s ease;
}
.dropzone:hover { border-color: var(--accent); }
.dropzone:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.dropzone.dragging { border-color: var(--accent); background: var(--accent-tint); }
.dz-icon {
  width: 52px; height: 52px; margin: 0 auto 18px;
  border-radius: 12px; background: var(--accent-tint);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
}
.dz-title { font-size: 17px; font-weight: 600; margin: 0 0 4px; letter-spacing: -0.01em; }
.dz-sub { font-size: 14px; color: var(--muted); margin: 0 0 22px; }
.privacy {
  font-size: 13px; color: var(--muted); max-width: 440px;
  text-align: center; line-height: 1.6;
}
.error {
  color: #b42318; background: #fef3f2; border: 1px solid #fda29b;
  border-radius: 8px; padding: 10px 14px; font-size: 13px;
  max-width: 440px; text-align: center;
}

/* ---------- Viewer screen (shared by tools) ---------- */
.viewer { position: fixed; inset: 0; display: flex; flex-direction: column; background: var(--surface); }
.toolbar {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; padding-top: max(10px, env(safe-area-inset-top));
  border-bottom: 1px solid var(--border); background: var(--surface);
}
.tool-btn {
  font-family: var(--sans); font-size: 14px; font-weight: 600; color: var(--ink);
  background: transparent; border: 1px solid var(--border); border-radius: 9px;
  padding: 8px 12px; min-height: 40px;
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer; white-space: nowrap;
}
.tool-btn:hover { background: var(--bg); }
.tool-btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.filename {
  flex: 1; min-width: 0; font-family: var(--mono); font-size: 13px; color: var(--muted);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; text-align: center;
}
.frame { flex: 1; width: 100%; border: none; background: #fff; }

.hidden { display: none !important; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }