/* ============================================================
   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;
  --on-accent: #ffffff;
  --code-bg: #1f1f1d;
  --code-ink: #f4f4f2;
  --logo-invert: 0;
  --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;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ---------- Global navbar ---------- */
.lll-nav {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px; padding-top: max(10px, env(safe-area-inset-top));
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.lll-nav .nav-logo { flex: none; line-height: 0; }
.lll-nav .nav-logo img { height: 26px; width: auto; display: block; }
.nav-links {
  display: flex; gap: 4px; flex: 1;
  overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none;
}
.nav-links::-webkit-scrollbar { display: none; }
.nav-links a {
  font-size: 14px; font-weight: 600; color: var(--muted); text-decoration: none;
  padding: 6px 12px; border-radius: 8px; white-space: nowrap;
}
.nav-links a:hover { background: var(--bg); color: var(--ink); }
.nav-links a.active { background: var(--accent-tint); color: var(--ink); }
.nav-lang { flex: none; }

/* ---------- 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: var(--on-accent);
  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;
  flex: 1;
  min-height: 0;
  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; } }


/* ============================================================
   Dark theme
   Applied when <html data-theme="dark">. Set by shared/theme.js,
   which honours the OS setting and remembers a manual override.
   ============================================================ */
:root[data-theme="dark"] {
  --bg: #17171a;
  --surface: #202024;
  --ink: #ececea;
  --muted: #9a9a95;
  --border: #34343a;
  --accent: #ececea;
  --accent-tint: #2b2b31;
  --on-accent: #17171a;
  --code-bg: #101012;
  --code-ink: #ececea;
  --logo-invert: 1;
}

/* Logo is dark ink artwork; invert it on dark backgrounds. */
.brand-logo img,
.lll-nav .nav-logo img,
.hero-logo img { filter: invert(var(--logo-invert)); }

/* Buttons use --on-accent so text stays readable in both themes. */
.btn { color: var(--on-accent); }
.btn:hover { filter: brightness(1.15); }

/* Theme toggle button in the navbar */
.theme-btn {
  flex: none;
  width: 34px; height: 34px; padding: 0;
  display: inline-flex; align-items: center; justify-content: center;
  background: transparent; color: var(--muted);
  border: 1px solid var(--border); border-radius: 9px; cursor: pointer;
}
.theme-btn:hover { color: var(--ink); background: var(--bg); }
.theme-btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.theme-btn .moon { display: none; }
:root[data-theme="dark"] .theme-btn .sun { display: none; }
:root[data-theme="dark"] .theme-btn .moon { display: block; }

/* ---------- Shared loading state ---------- */
.lll-loading {
  flex: 1;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px; padding: 48px 20px; color: var(--muted); font-size: 14px;
}
.lll-spinner {
  width: 26px; height: 26px; border-radius: 50%;
  border: 2.5px solid var(--border); border-top-color: var(--ink);
  animation: lll-spin .7s linear infinite;
}
@keyframes lll-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .lll-spinner { animation-duration: 2s; }
}

/* ---------- Drag & drop hint (desktop only) ---------- */
.drop-hint { display: none; font-size: 13px; color: var(--muted); margin: 14px 0 0; }
@media (hover: hover) and (pointer: fine) {
  .drop-hint { display: block; }
}

/* ---------- Error state ---------- */
.error { display: flex; align-items: center; gap: 9px; justify-content: center; }
:root[data-theme="dark"] .error {
  color: #ffb4ab; background: #3a1d1a; border-color: #6b2f28;
}