#aipara-root, #aipara-seo-intro {
  --aip-green: #23c45e;
  --aip-green-dk: #18a84f;
  --aip-green-lt: #e8faf0;
  --aip-green-mid: #b8f0d0;
  --aip-blue: #5b6ee8;
  --aip-purple: #8b5cf6;
  --aip-orange: #f59e0b;
  --aip-navy: #1e293b;
  --aip-academic: #0369a1;
  --aip-teal: #06b6d4;
  --aip-red: #ef4444;
  --aip-text: #1e293b;
  --aip-text2: #64748b;
  --aip-text3: #94a3b8;
  --aip-border: #e2e8f0;
  --aip-border2: #cbd5e1;
  --aip-bg: #f1f5f9;
  --aip-white: #ffffff;
  --aip-surface: #f8fafc;
  --aip-sh: 0 1px 4px rgba(0,0,0,.06);
  --aip-sh2: 0 4px 24px rgba(0,0,0,.10);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--aip-text);
  max-width: 1120px;
  margin: 0 auto;
  -webkit-font-smoothing: antialiased;
}
#aipara-root *, #aipara-root *::before, #aipara-root *::after,
#aipara-seo-intro *, #aipara-seo-intro *::before, #aipara-seo-intro *::after {
  box-sizing: border-box;
}

#aipara-seo-intro { max-width: 860px; margin: 0 auto 24px; padding: 0 16px; }
#aipara-seo-intro p { font-size: 14px; color: var(--aip-text2); line-height: 1.8; margin: 0; }

.aip-page-head { margin-bottom: 18px; padding: 0 4px; }
.aip-page-head h1 { font-size: 24px; font-weight: 800; color: var(--aip-navy); letter-spacing: -.025em; margin: 0 0 4px; }
.aip-page-head p { font-size: 13.5px; color: var(--aip-text2); margin: 0; }

.aip-tool-card {
  background: var(--aip-white);
  border-radius: 16px;
  border: 1px solid var(--aip-border);
  box-shadow: var(--aip-sh2);
  overflow: hidden;
}

/* ── MODE STRIP ── */
.aip-mode-strip { padding: 10px 16px; border-bottom: 1px solid var(--aip-border); background: var(--aip-white); }
.aip-mode-row1 {
  display: flex; align-items: center; gap: 6px;
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  scrollbar-width: none; -ms-overflow-style: none;
  padding-bottom: 8px;
}
.aip-mode-row1::-webkit-scrollbar { display: none; }
.aip-mode-row2 { display: flex; justify-content: flex-end; }
.aip-mode-lbl { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--aip-text3); margin-right: 4px; flex-shrink: 0; }
.aip-mchip {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 99px;
  font-size: 12.5px; font-weight: 600; cursor: pointer;
  border: 1.5px solid var(--aip-border); background: var(--aip-white); color: var(--aip-text2);
  font-family: inherit; transition: all .18s; white-space: nowrap; flex-shrink: 0;
}
.aip-mchip:hover { border-color: var(--aip-border2); color: var(--aip-text); }
.aip-mchip .aip-dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; opacity: .5; }
.aip-mchip.on { border-color: transparent; color: #fff; }
.aip-mchip.on .aip-dot { opacity: 1; background: rgba(255,255,255,.7); }
.aip-mchip[data-m="standard"].on { background: var(--aip-green); }
.aip-mchip[data-m="fluency"].on { background: var(--aip-blue); }
.aip-mchip[data-m="formal"].on { background: var(--aip-navy); }
.aip-mchip[data-m="academic"].on { background: var(--aip-academic); }
.aip-mchip[data-m="creative"].on { background: var(--aip-purple); }
.aip-mchip[data-m="shorten"].on { background: var(--aip-teal); }
.aip-mchip[data-m="expand"].on { background: var(--aip-orange); }

/* ── PANELS ── */
.aip-panels { display: grid; grid-template-columns: 1fr 1fr; min-height: 420px; overflow-x: hidden; }
.aip-panel { display: flex; flex-direction: column; }
.aip-panel + .aip-panel { border-left: 1px solid var(--aip-border); }

.aip-p-top { padding: 12px 16px 10px; border-bottom: 1px solid var(--aip-border); display: flex; align-items: center; gap: 8px; min-height: 44px; }
.aip-p-top-label { font-size: 12px; font-weight: 700; color: var(--aip-text2); text-transform: uppercase; letter-spacing: .06em; }
.aip-wc-tag { margin-left: auto; font-size: 11.5px; font-weight: 600; color: var(--aip-text3); background: var(--aip-bg); border: 1px solid var(--aip-border); padding: 2px 9px; border-radius: 99px; }
.aip-wc-tag.live { color: var(--aip-green-dk); background: var(--aip-green-lt); border-color: var(--aip-green-mid); }

.aip-left-panel { position: relative; }
.aip-txt-ph { position: absolute; top: 44px; left: 0; right: 0; bottom: 64px; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 24px; pointer-events: none; transition: opacity .2s; text-align: center; }
.aip-txt-ph.gone { opacity: 0; }
.aip-ph-icon { font-size: 32px; opacity: .2; margin-bottom: 10px; }
.aip-ph-t { font-size: 13.5px; font-weight: 600; color: var(--aip-text3); margin-bottom: 5px; }
.aip-ph-s { font-size: 12px; color: var(--aip-text3); line-height: 1.5; opacity: .75; max-width: 280px; }

#aipara-root textarea {
  flex: 1; width: 100%; border: none; outline: none; resize: none;
  padding: 14px 16px; font-size: 14px; line-height: 1.8; color: var(--aip-text);
  font-family: inherit; background: transparent; caret-color: var(--aip-green); min-height: 300px;
}

.aip-p-bottom { padding: 10px 14px; border-top: 1px solid var(--aip-border); display: flex; align-items: center; justify-content: space-between; gap: 8px; background: var(--aip-surface); flex-wrap: wrap; }
.aip-pb-left { display: flex; align-items: center; gap: 7px; }
.aip-pb-wc { font-size: 12px; color: var(--aip-text3); }
.aip-pb-wc b { color: var(--aip-text2); }
.aip-btn-sm { padding: 6px 12px; border-radius: 7px; font-size: 12px; font-weight: 600; cursor: pointer; font-family: inherit; border: 1.5px solid var(--aip-border); background: var(--aip-white); color: var(--aip-text2); transition: all .17s; }
.aip-btn-sm:hover { border-color: var(--aip-border2); color: var(--aip-text); }

.aip-btn-go, .aip-btn-go-full {
  display: flex; align-items: center; justify-content: center; gap: 7px;
  padding: 9px 22px; background: var(--aip-green); border: none; border-radius: 8px;
  color: #fff; font-size: 13.5px; font-weight: 700; cursor: pointer; font-family: inherit;
  transition: all .2s; box-shadow: 0 2px 10px rgba(35,196,94,.35); letter-spacing: .01em;
}
.aip-btn-go-full { width: 100%; }
.aip-btn-go:hover:not(:disabled), .aip-btn-go-full:hover:not(:disabled) { background: var(--aip-green-dk); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(35,196,94,.45); }
.aip-btn-go:disabled, .aip-btn-go-full:disabled { opacity: .4; cursor: not-allowed; transform: none; box-shadow: none; }

.aip-err-bar { display: none; padding: 9px 14px; background: #fef2f2; border-top: 1px solid #fecaca; font-size: 12.5px; color: var(--aip-red); font-weight: 500; }
.aip-err-bar.on { display: block; }

.aip-right-panel { display: flex; flex-direction: column; }
.aip-r-idle { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 32px 24px; text-align: center; gap: 10px; }
.aip-r-idle-ico { font-size: 38px; opacity: .18; }
.aip-r-idle-t { font-size: 14px; font-weight: 600; color: var(--aip-text3); }
.aip-r-idle-s { font-size: 12.5px; color: var(--aip-text3); line-height: 1.6; max-width: 200px; opacity: .8; }

.aip-r-load { flex: 1; display: none; flex-direction: column; align-items: center; justify-content: center; padding: 32px; gap: 14px; text-align: center; }
.aip-r-load.on { display: flex; }
.aip-spin-ring { width: 44px; height: 44px; border-radius: 50%; border: 3px solid var(--aip-border); border-top-color: var(--aip-green); animation: aipSpin .9s linear infinite; }
@keyframes aipSpin { to { transform: rotate(360deg); } }
.aip-spin-t { font-size: 13.5px; font-weight: 600; color: var(--aip-text2); }
.aip-spin-s { font-size: 12px; color: var(--aip-text3); }
.aip-spin-badge { padding: 5px 14px; border-radius: 99px; font-size: 12px; font-weight: 700; color: #fff; background: var(--aip-green); }

.aip-r-result { display: none; flex-direction: column; flex: 1; }
.aip-r-result.on { display: flex; }
.aip-r-result-body { flex: 1; padding: 14px 16px; font-size: 14px; line-height: 1.85; color: var(--aip-text); overflow-y: auto; cursor: text; user-select: text; }
.aip-r-result-body p { margin: 0 0 10px; }
.aip-r-result-body p:last-child { margin-bottom: 0; }

.aip-w { display: inline; border-radius: 3px; padding: 0 1px; cursor: pointer; transition: background .13s; }
.aip-w:hover { background: var(--aip-green-lt); }
.aip-w.sel { background: var(--aip-green-lt); outline: 2px solid var(--aip-green-mid); border-radius: 3px; }
.aip-w.swapped { background: #fef3c7; border-bottom: 2px solid var(--aip-orange); border-radius: 3px 3px 0 0; }

.aip-r-result-foot { padding: 10px 14px; border-top: 1px solid var(--aip-border); display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; background: var(--aip-surface); }
.aip-rrf-left { font-size: 11.5px; color: var(--aip-text3); }
.aip-btn-copy { padding: 7px 16px; background: var(--aip-green); border: none; border-radius: 7px; color: #fff; font-size: 12.5px; font-weight: 700; cursor: pointer; font-family: inherit; transition: all .17s; }
.aip-btn-copy:hover { background: var(--aip-green-dk); }
.aip-btn-ghost { display: inline-flex; align-items: center; gap: 4px; padding: 7px 12px; background: transparent; border: 1.5px solid var(--aip-border); border-radius: 7px; color: var(--aip-text2); font-size: 12.5px; font-weight: 600; cursor: pointer; font-family: inherit; transition: all .17s; }
.aip-btn-ghost:hover { border-color: var(--aip-border2); color: var(--aip-text); }

.aip-mode-result-badge { padding: 3px 10px; border-radius: 99px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; }
.aip-mode-result-badge.standard { background: var(--aip-green-lt); color: var(--aip-green-dk); }
.aip-mode-result-badge.fluency { background: #eff2ff; color: var(--aip-blue); }
.aip-mode-result-badge.formal { background: #f1f5f9; color: var(--aip-navy); }
.aip-mode-result-badge.academic { background: #e0f2fe; color: var(--aip-academic); }
.aip-mode-result-badge.creative { background: #f5f3ff; color: var(--aip-purple); }
.aip-mode-result-badge.shorten { background: #ecfeff; color: var(--aip-teal); }
.aip-mode-result-badge.expand { background: #fffbeb; color: #b45309; }
.aip-wc-compare { margin-left: 8px; font-size: 12px; color: var(--aip-text3); }
.aip-result-actions { margin-left: auto; display: flex; gap: 6px; }

.aip-syn-pop { position: fixed; z-index: 999; background: var(--aip-white); border: 1px solid var(--aip-border2); border-radius: 12px; box-shadow: 0 8px 40px rgba(0,0,0,.14); padding: 10px 8px 8px; min-width: 180px; max-width: 280px; display: none; }
.aip-syn-pop.on { display: block; }
.aip-syn-hd { font-size: 10.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--aip-text3); padding: 0 6px 8px; border-bottom: 1px solid var(--aip-border); }
.aip-syn-items { display: flex; flex-wrap: wrap; gap: 5px; padding: 8px 4px 2px; }
.aip-syn-chip { padding: 4px 11px; border-radius: 99px; font-size: 12.5px; font-weight: 600; cursor: pointer; background: var(--aip-surface); border: 1.5px solid var(--aip-border); color: var(--aip-text2); font-family: inherit; transition: all .15s; }
.aip-syn-chip:hover { background: var(--aip-green-lt); border-color: var(--aip-green-mid); color: var(--aip-green-dk); }
.aip-syn-empty { font-size: 12.5px; color: var(--aip-text3); padding: 4px 6px; }

/* ── BELOW ── */
.aip-below { max-width: 1120px; margin: 0 auto; padding: 24px 4px 0; }
.aip-how-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(200px,1fr)); gap: 12px; margin-bottom: 28px; }
.aip-how-c { background: var(--aip-white); border: 1px solid var(--aip-border); border-radius: 12px; padding: 18px 16px; }
.aip-how-n { width: 28px; height: 28px; background: var(--aip-green); border-radius: 8px; color: #fff; font-size: 13px; font-weight: 800; display: flex; align-items: center; justify-content: center; margin-bottom: 10px; }
.aip-how-h { font-size: 13.5px; font-weight: 700; color: var(--aip-text); margin-bottom: 5px; }
.aip-how-p { font-size: 12.5px; color: var(--aip-text2); line-height: 1.55; }

.aip-modes-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(150px,1fr)); gap: 10px; margin-bottom: 24px; }
.aip-mc { background: var(--aip-white); border: 1px solid var(--aip-border); border-radius: 10px; padding: 14px 13px; }
.aip-mc-bar { height: 4px; border-radius: 99px; margin-bottom: 10px; }
.aip-mc-bar[data-color="standard"] { background: var(--aip-green); }
.aip-mc-bar[data-color="fluency"] { background: var(--aip-blue); }
.aip-mc-bar[data-color="formal"] { background: var(--aip-navy); }
.aip-mc-bar[data-color="academic"] { background: var(--aip-academic); }
.aip-mc-bar[data-color="creative"] { background: var(--aip-purple); }
.aip-mc-bar[data-color="shorten"] { background: var(--aip-teal); }
.aip-mc-bar[data-color="expand"] { background: var(--aip-orange); }
.aip-mc-t { font-size: 13px; font-weight: 700; color: var(--aip-text); margin-bottom: 3px; }
.aip-mc-d { font-size: 12px; color: var(--aip-text3); line-height: 1.5; }

.aip-disc { text-align: center; font-size: 12px; color: var(--aip-text3); line-height: 1.7; margin-bottom: 8px; }

/* ── FAQ ── */
.aip-faq-section { max-width: 860px; margin: 32px auto 0; padding: 0 4px; }
.aip-faq-section h2 { font-size: 20px; font-weight: 800; color: var(--aip-navy); margin: 0 0 20px; letter-spacing: -.02em; }
.aip-faq-item { border: 1px solid var(--aip-border); border-radius: 12px; margin-bottom: 10px; overflow: hidden; background: var(--aip-white); }
.aip-faq-q { width: 100%; text-align: left; padding: 16px 20px; background: var(--aip-white); border: none; font-size: 14px; font-weight: 600; color: var(--aip-text); cursor: pointer; font-family: inherit; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.aip-faq-icon { font-size: 20px; font-weight: 300; color: var(--aip-text3); flex-shrink: 0; transition: transform .2s ease; line-height: 1; }
.aip-faq-item.open .aip-faq-icon { transform: rotate(45deg); }
.aip-faq-item.open .aip-faq-q { background: var(--aip-surface); }
.aip-faq-a { display: none; padding: 0 20px 16px; font-size: 13.5px; color: var(--aip-text2); line-height: 1.7; background: var(--aip-white); }
.aip-faq-item.open .aip-faq-a { display: block; }

/* ── RESPONSIVE ── */
@media(max-width:700px) {
  .aip-panels { grid-template-columns: 1fr; }
  .aip-tool-card { border-radius: 12px; }
  .aip-mode-row1 { gap: 6px; }
  .aip-mchip { font-size: 12px; padding: 5px 12px; }
  .aip-btn-go-full { font-size: 13.5px; padding: 10px; }
  .aip-p-bottom { flex-wrap: wrap; gap: 8px; }
  .aip-btn-go { width: 100%; justify-content: center; padding: 11px; font-size: 14px; }
  .aip-pb-left { width: 100%; justify-content: space-between; }
  #aipara-root textarea { min-height: 200px; font-size: 14px; }
  .aip-panel + .aip-panel { border-left: none; border-top: 1px solid var(--aip-border); }
  .aip-how-grid, .aip-modes-grid { grid-template-columns: 1fr 1fr; }
  .aip-panels { min-height: unset; }
  .aip-tool-card { overflow-x: hidden; }
}
@media(max-width:480px) {
  .aip-page-head h1 { font-size: 18px; }
  .aip-page-head p { font-size: 12px; }
  .aip-mchip { font-size: 11.5px; padding: 5px 10px; }
  .aip-p-top { padding: 10px 12px; min-height: 40px; }
  #aipara-root textarea { font-size: 13.5px; min-height: 160px; padding: 10px 12px; }
  .aip-p-bottom { padding: 8px 10px; }
  .aip-btn-go { font-size: 13.5px; padding: 10px; border-radius: 8px; }
  .aip-btn-sm { font-size: 11.5px; padding: 5px 10px; }
  .aip-r-idle { padding: 20px 16px; min-height: 140px; }
  .aip-r-idle-ico { font-size: 30px; }
  .aip-r-load { min-height: 140px; }
  .aip-r-result-body { font-size: 13.5px; padding: 12px; min-height: 140px; }
  .aip-r-result-foot { padding: 8px 10px; flex-wrap: wrap; }
  .aip-btn-copy { font-size: 12px; padding: 6px 14px; }
  .aip-btn-ghost { font-size: 12px; padding: 6px 10px; }
  .aip-how-grid, .aip-modes-grid { grid-template-columns: 1fr; gap: 8px; }
  .aip-syn-pop { min-width: 160px; max-width: 92vw; }
}