/* ============ tokens ============ */
:root {
  --bg: #f7f6fb;
  --bg-card: #ffffff;
  --bg-header: rgba(247, 246, 251, 0.85);
  --text: #1c1830;
  --text-soft: #605a78;
  --line: #e5e2ef;
  --accent: #7c3aed;
  --accent-soft: #ede9fe;
  --accent-ink: #ffffff;
  --ok: #15803d;
  --ok-bg: #eaf7ef;
  --warn: #b45309;
  --warn-bg: #fdf3e3;
  --bad: #b91c1c;
  --bad-bg: #fdeaea;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(28, 24, 48, 0.06), 0 8px 24px rgba(28, 24, 48, 0.07);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14101f;
    --bg-card: #1e1930;
    --bg-header: rgba(20, 16, 31, 0.85);
    --text: #efecf7;
    --text-soft: #a49dbd;
    --line: #322a4d;
    --accent: #a78bfa;
    --accent-soft: #2c2350;
    --accent-ink: #17121f;
    --ok: #34d399;
    --ok-bg: #10281f;
    --warn: #fbbf24;
    --warn-bg: #2c2312;
    --bad: #f87171;
    --bad-bg: #321a1c;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

/* ============ base ============ */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.container { max-width: 1020px; margin: 0 auto; padding: 0 20px; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 0.5em; }
a { color: var(--accent); }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ============ header ============ */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: var(--bg-header);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding-block: 12px; gap: 10px; }
.logo { font-weight: 800; font-size: 1.05rem; text-decoration: none; color: var(--text); white-space: nowrap; }
.site-nav { display: flex; flex-wrap: wrap; justify-content: flex-end; }
.site-nav a { margin-left: 16px; text-decoration: none; color: var(--text-soft); font-weight: 600; font-size: 0.92rem; }
.site-nav a:hover { color: var(--accent); }
@media (max-width: 560px) {
  .logo { font-size: 0.92rem; }
  .site-nav a { margin-left: 9px; font-size: 0.8rem; }
}

/* ============ hero ============ */
.hero { padding: 46px 0 10px; text-align: center; }
.hero h1 { font-size: clamp(1.7rem, 4.5vw, 2.6rem); letter-spacing: -0.02em; }
.hero-sub { max-width: 640px; margin: 0 auto 8px; color: var(--text-soft); font-size: 1.03rem; }
.privacy-line { color: var(--ok); font-weight: 600; font-size: 0.9rem; margin: 0 0 22px; }

/* ============ tool UI ============ */
.tool { padding: 8px 0 24px; }
.dropzone {
  border: 2px dashed var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 44px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.dropzone:hover, .dropzone.drag { border-color: var(--accent); background: var(--accent-soft); }
.dropzone .dz-icon { font-size: 2.2rem; display: block; margin-bottom: 8px; }
.dropzone strong { font-size: 1.05rem; }
.dropzone p { margin: 6px 0 0; color: var(--text-soft); font-size: 0.88rem; }

.settings {
  display: flex; flex-wrap: wrap; gap: 14px 22px; align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 18px;
  margin-top: 14px;
  font-size: 0.92rem;
}
.settings label { display: flex; align-items: center; gap: 8px; font-weight: 600; color: var(--text-soft); }
.settings select, .settings input[type="number"] {
  background: var(--bg); color: var(--text);
  border: 1px solid var(--line); border-radius: 8px;
  padding: 6px 8px; font-size: 0.92rem; font-family: inherit;
}
.settings input[type="range"] { accent-color: var(--accent); width: 140px; }
.settings input[type="number"] { width: 84px; }
.settings .qv { min-width: 34px; text-align: right; font-variant-numeric: tabular-nums; color: var(--text); }
.settings .modes { display: flex; gap: 12px; }
.settings .modes label { font-weight: 600; cursor: pointer; }

.results { margin-top: 16px; display: grid; gap: 12px; }
.result-row {
  display: flex; align-items: center; gap: 14px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 12px 16px;
}
.result-thumb {
  width: 56px; height: 56px; border-radius: 8px; object-fit: cover; flex-shrink: 0;
  background:
    linear-gradient(45deg, rgba(128,128,128,.25) 25%, transparent 25%, transparent 75%, rgba(128,128,128,.25) 75%),
    linear-gradient(45deg, rgba(128,128,128,.25) 25%, transparent 25%, transparent 75%, rgba(128,128,128,.25) 75%);
  background-size: 12px 12px; background-position: 0 0, 6px 6px;
}
.result-info { flex: 1; min-width: 0; }
.result-name { font-weight: 700; font-size: 0.92rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.result-meta { color: var(--text-soft); font-size: 0.84rem; }
.result-meta .saved { color: var(--ok); font-weight: 700; }
.result-meta .grew { color: var(--warn); font-weight: 700; }
.result-meta .err { color: var(--bad); font-weight: 700; }
.result-row .btn { flex-shrink: 0; }
@media (max-width: 520px) {
  .result-row { flex-wrap: wrap; }
}

.toolbar { margin-top: 14px; display: flex; gap: 10px; flex-wrap: wrap; }

/* progress (bg remover) */
.progress-wrap { margin-top: 14px; display: none; }
.progress-wrap.show { display: block; }
.progress-label { font-size: 0.88rem; color: var(--text-soft); margin-bottom: 6px; }
.progress-bar { height: 8px; background: var(--line); border-radius: 999px; overflow: hidden; }
.progress-bar > div { height: 100%; width: 0%; background: var(--accent); border-radius: 999px; transition: width 0.2s ease; }

/* before/after (bg remover) */
.ba { display: flex; gap: 10px; flex-wrap: wrap; }
.ba figure { margin: 0; }
.ba img, .ba canvas { max-width: 160px; max-height: 120px; border-radius: 8px; display: block; }
.ba figcaption { font-size: 0.75rem; color: var(--text-soft); text-align: center; margin-top: 2px; }

/* ============ buttons ============ */
.btn {
  display: inline-block;
  border-radius: 10px;
  padding: 9px 15px;
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid var(--line);
  background: var(--bg-card);
  color: var(--text);
  white-space: nowrap;
  transition: transform 0.1s ease, box-shadow 0.15s ease;
  font-family: inherit;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn--cta { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn--ghost { background: transparent; }
.btn[disabled] { opacity: 0.55; cursor: default; transform: none; }

/* ============ tool grid (hub) ============ */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
  padding: 10px 0 30px;
}
.tool-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.12s ease, border-color 0.12s ease;
}
.tool-card:hover { transform: translateY(-2px); border-color: var(--accent); }
.tool-card .tc-icon { font-size: 1.8rem; }
.tool-card h3 { margin: 8px 0 4px; font-size: 1.05rem; }
.tool-card p { margin: 0; color: var(--text-soft); font-size: 0.88rem; }

/* ============ content sections ============ */
.content { padding: 26px 0 8px; }
.content h2 { font-size: 1.35rem; }
.content p, .content li { color: var(--text-soft); font-size: 0.96rem; max-width: 760px; }
.content strong { color: var(--text); }

.faq { padding: 26px 0 34px; }
.faq h2 { font-size: 1.35rem; }
.faq details {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 13px 17px;
  margin-bottom: 10px;
}
.faq summary { font-weight: 700; cursor: pointer; }
.faq details p { color: var(--text-soft); margin: 10px 0 2px; font-size: 0.94rem; }

/* ============ footer ============ */
.site-footer { border-top: 1px solid var(--line); padding: 26px 0 38px; color: var(--text-soft); font-size: 0.87rem; }
.footnote { margin-top: 8px; font-size: 0.8rem; }