:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --subtle: #f4f4f5;
  --text: #18181b;
  --muted: #71717a;
  --border: #e4e4e7;
  --border-strong: #d4d4d8;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-soft: #eef2ff;
  --on-accent: #ffffff;
  --ok: #15803d;
  --warn: #b45309;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(24, 24, 27, .04), 0 1px 3px rgba(24, 24, 27, .06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0d;
    --surface: #151518;
    --subtle: #1c1c20;
    --text: #f4f4f5;
    --muted: #a1a1aa;
    --border: #27272a;
    --border-strong: #3f3f46;
    --accent: #818cf8;
    --accent-hover: #a5b4fc;
    --accent-soft: #1e1b4b;
    --on-accent: #0b0b0d;
    --ok: #4ade80;
    --warn: #fbbf24;
    --shadow: none;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
svg { flex: none; }

/* header */
.site-header { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: saturate(180%) blur(12px); -webkit-backdrop-filter: saturate(180%) blur(12px); border-bottom: 1px solid var(--border); }
.site-header .inner { max-width: 1040px; margin: 0 auto; padding: 0 16px; height: 56px; display: flex; align-items: center; gap: 24px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 650; letter-spacing: -0.01em; text-decoration: none; white-space: nowrap; }
.brand .mark { display: block; }
.nav { display: flex; gap: 2px; flex: 1; }
.nav-group { position: relative; }
.nav-btn { color: var(--muted); padding: 6px 10px; border-radius: 8px; font-size: 14px; font-weight: 550; display: inline-flex; align-items: center; gap: 4px; text-decoration: none; white-space: nowrap; }
.nav-btn:hover, .nav-group.open .nav-btn { background: var(--subtle); color: var(--text); }
.nav-btn.active { color: var(--accent); }
.nav-btn svg { transition: transform .15s; }
.nav-group.open .nav-btn svg { transform: rotate(180deg); }
.nav-menu { position: absolute; top: 100%; left: 0; z-index: 20; min-width: 220px; padding: 6px; margin-top: 6px; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; box-shadow: 0 12px 32px rgba(24, 24, 27, .12); }
.nav-menu::before { content: ""; position: absolute; left: 0; right: 0; top: -8px; height: 8px; } /* keeps hover alive across the gap */
.nav-menu[hidden] { display: none; }
.nav-menu a { display: flex; gap: 10px; align-items: center; padding: 8px 10px; border-radius: 8px; text-decoration: none; color: var(--text); font-size: 14px; font-weight: 500; white-space: nowrap; }
.nav-menu a:hover, .nav-menu a:focus-visible, .nav-menu a[aria-current=page] { background: var(--subtle); }
.nav-menu a[aria-current=page] { color: var(--accent); }
.nav-icon { width: 28px; height: 28px; border-radius: 8px; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; flex: none; }
@media (max-width: 640px) {
  .site-header .inner { flex-wrap: wrap; height: auto; padding-top: 10px; padding-bottom: 6px; gap: 6px 12px; }
  .nav { order: 3; flex-basis: 100%; margin: 0 -10px; }
  /* on phones the menus span the screen width under the header */
  .site-header .inner { position: relative; }
  .nav-group { position: static; }
  .nav-menu { left: 16px; right: 16px; width: auto; min-width: 0; top: 100%; }
}

main { max-width: 1040px; margin: 0 auto; padding: 40px 16px 80px; }
main.tool { max-width: 820px; }

/* home */
.hero { padding: 40px 0 36px; }
.hero h1 { margin: 0 0 16px; font-weight: 700; letter-spacing: -0.03em; }
.hero-brand { display: block; font-size: clamp(48px, 10vw, 84px); line-height: 1; letter-spacing: -0.04em; color: var(--accent); margin-bottom: 10px; }
.hero-tagline { display: block; font-size: clamp(24px, 4vw, 36px); line-height: 1.15; color: var(--text); }
.hero p { font-size: 18px; color: var(--muted); margin: 0; max-width: 520px; }
.group { margin-top: 36px; }
.group:first-child { margin-top: 0; }
.group-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; margin-bottom: 14px; }
.group-head h2 { font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--accent); margin: 0; }
.group-head p { margin: 0; color: var(--muted); font-size: 14px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 900px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .cards { grid-template-columns: 1fr; } }
.card {
  display: flex; gap: 14px; padding: 20px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; text-decoration: none; box-shadow: var(--shadow); transition: border-color .15s, transform .15s;
}
.card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.card .icon { width: 42px; height: 42px; border-radius: 11px; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; }
.card h3 { font-size: 16px; margin: 2px 0 4px; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }
.card .go { margin-left: auto; color: var(--muted); align-self: center; transition: transform .15s, color .15s; }
.card:hover .go { color: var(--text); transform: translateX(3px); }
.trust { display: flex; flex-wrap: wrap; gap: 8px 28px; margin-top: 32px; color: var(--muted); font-size: 14px; }
.trust span { display: inline-flex; align-items: center; gap: 8px; }

/* tool pages */
.page-head { margin-bottom: 24px; }
.page-head h1 { font-size: 28px; letter-spacing: -0.02em; margin: 0 0 4px; }
.page-head p { color: var(--muted); margin: 0; }

.drop {
  display: flex; flex-direction: column; align-items: center; gap: 6px; text-align: center; cursor: pointer;
  padding: 44px 16px; border: 1.5px dashed var(--border-strong); border-radius: 16px; background: var(--surface);
  transition: border-color .15s, background .15s;
}
.drop:hover, .drop.over { border-color: var(--accent); background: var(--accent-soft); }
.drop .icon { color: var(--accent); margin-bottom: 4px; }
.drop strong { font-size: 16px; font-weight: 600; }
.drop span { color: var(--muted); font-size: 14px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; opacity: 0; overflow: hidden; }

.toggles { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 24px; }
.toggle { position: relative; display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); font-size: 13.5px; color: var(--muted); cursor: pointer; user-select: none; -webkit-user-select: none; }
.toggle input { position: absolute; opacity: 0; pointer-events: none; }
.toggle::before { content: ""; width: 14px; height: 14px; border-radius: 4px; border: 1.5px solid var(--border-strong); background: var(--surface); }
.toggle:has(input:checked) { color: var(--text); border-color: var(--accent); background: var(--accent-soft); }
.toggle:has(input:checked)::before { background: var(--accent) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='white' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3.5 8.5l3 3 6-7'/%3E%3C/svg%3E") center/11px no-repeat; border-color: var(--accent); }
.toggle:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: 2px; }
.field-inline { display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--muted); }

button, .button {
  font: inherit; font-size: 14px; font-weight: 550; border-radius: 9px; padding: 8px 14px; cursor: pointer; text-decoration: none;
  border: 1px solid var(--border); background: var(--surface); color: var(--text); display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  transition: background .15s, border-color .15s;
}
button:hover, .button:hover { background: var(--subtle); }
button.primary, .button.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
button.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
button:disabled { opacity: .5; cursor: default; }
button:focus-visible, .button:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

input[type=text], input[type=url], input[type=password], select {
  font: inherit; font-size: 15px; padding: 9px 12px; border-radius: 9px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); width: 100%; min-width: 0;
}
select { width: auto; padding: 7px 10px; font-size: 14px; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.row > input { flex: 1 1 240px; }

textarea {
  display: block; width: 100%; min-height: 220px; max-height: 65vh; resize: vertical;
  border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; background: var(--surface); color: var(--text);
  font: 13px/1.6 ui-monospace, SFMono-Regular, Menlo, monospace;
}

.panel { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; margin-bottom: 16px; box-shadow: var(--shadow); }
.panel-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; padding: 12px 14px 12px 18px; border-bottom: 1px solid var(--border); }
.panel textarea { border: 0; border-radius: 0; background: var(--subtle); box-shadow: none; }
.name { font-weight: 600; flex: 1 1 180px; min-width: 0; overflow-wrap: anywhere; }
.meta { color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.actions { display: flex; gap: 8px; }
.alert { padding: 10px 18px; font-size: 14px; color: var(--warn); border-bottom: 1px solid var(--border); }
.status { color: var(--warn); font-size: 14px; min-height: 1em; }
.status a { color: var(--accent); }

.tabs { display: inline-flex; padding: 3px; gap: 2px; background: var(--subtle); border-radius: 10px; margin-bottom: 16px; max-width: 100%; overflow-x: auto; }
.tabs button { border: 0; background: none; color: var(--muted); padding: 6px 14px; border-radius: 8px; font-weight: 500; white-space: nowrap; }
.tabs button[aria-selected=true] { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin: 12px 0 0; }
@media (max-width: 560px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat { background: var(--surface); padding: 12px 16px; }
.stat .label { font-size: 12.5px; color: var(--muted); }
.stat .value { font-size: 22px; font-weight: 650; letter-spacing: -0.01em; font-variant-numeric: tabular-nums; }
.good { color: var(--ok); }

h2.section { font-size: 15px; font-weight: 600; margin: 32px 0 10px; }
details.more { margin-top: 32px; border-top: 1px solid var(--border); padding-top: 16px; }
details.more summary { cursor: pointer; font-weight: 600; font-size: 14.5px; list-style: none; display: flex; align-items: center; gap: 8px; }
details.more summary::-webkit-details-marker { display: none; }
details.more summary::before { content: "›"; display: inline-block; transition: transform .15s; color: var(--muted); font-size: 18px; line-height: 1; }
details.more[open] summary::before { transform: rotate(90deg); }
details.more .body { padding-top: 12px; }
.hint { color: var(--muted); font-size: 13.5px; margin: 8px 0 0; }
code { font: 0.92em ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--subtle); padding: 1px 5px; border-radius: 5px; }

.site-footer { max-width: 1040px; margin: 0 auto; padding: 24px 16px 40px; color: var(--muted); font-size: 13px; border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; }
.site-footer a { color: inherit; }

/* savings chart */
:root { --bar-before: #a5b4fc; --bar-after: #4f46e5; }
@media (prefers-color-scheme: dark) { :root { --bar-before: #4338ca; --bar-after: #a5b4fc; } }
.savings { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 18px 20px; margin-bottom: 16px; box-shadow: var(--shadow); }
.savings[hidden] { display: none; }
.savings-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 14px; margin-bottom: 14px; }
.savings-pct { font-size: 40px; font-weight: 700; letter-spacing: -0.03em; line-height: 1; font-variant-numeric: tabular-nums; }
.savings-pct.none { color: var(--muted); font-size: 28px; }
.savings-abs { font-size: 15px; font-weight: 600; }
.savings-note { flex-basis: 100%; color: var(--muted); font-size: 13px; }
.savings-legend { display: flex; gap: 16px; font-size: 12.5px; color: var(--muted); margin-bottom: 10px; }
.savings-legend span { display: inline-flex; align-items: center; gap: 6px; }
.savings-legend i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.srow { display: grid; grid-template-columns: minmax(0, 1fr); gap: 4px; padding: 6px 0; }
.srow + .srow { border-top: 1px solid var(--border); padding-top: 10px; margin-top: 4px; }
.srow-top { display: flex; justify-content: space-between; gap: 12px; font-size: 13px; }
.srow-label { color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.srow-nums { color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.srow-nums b { color: var(--text); font-weight: 600; }
.sbar { position: relative; height: 14px; }
.sbar .before, .sbar .after { position: absolute; left: 0; top: 0; bottom: 0; border-radius: 0 4px 4px 0; transition: width .35s ease; }
.sbar .before { background: var(--bar-before); }
.sbar .after { background: var(--bar-after); box-shadow: 2px 0 0 var(--surface); }
.stip { position: fixed; z-index: 50; pointer-events: none; background: var(--text); color: var(--bg); font-size: 12.5px; line-height: 1.45; padding: 7px 10px; border-radius: 8px; box-shadow: 0 4px 16px rgba(0,0,0,.18); font-variant-numeric: tabular-nums; }
.saved-total { display: inline-flex; align-items: center; gap: 8px; margin-top: 18px; padding: 6px 12px; border-radius: 999px; background: var(--accent-soft); color: var(--text); font-size: 14px; }
.saved-total b { color: var(--accent); }
.panel-chart .savings { border: 0; border-bottom: 1px solid var(--border); border-radius: 0; box-shadow: none; margin: 0; }

/* Claude | ChatGPT switch */
.provider { display: inline-flex; padding: 3px; gap: 2px; background: var(--subtle); border-radius: 10px; margin-left: auto; flex: none; }
.provider button { border: 0; background: none; color: var(--muted); padding: 5px 11px; border-radius: 8px; font-size: 13px; font-weight: 550; }
.provider button:hover { background: none; color: var(--text); }
.provider button[aria-checked=true] { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }
@media (max-width: 640px) { .provider { margin-left: auto; } .nav { order: 3; } }