@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');

:root {
  color-scheme: dark;
  --bg: #0A0D12;
  --panel: #11161D;
  --panel-2: #0C1116;
  --line: #1A2129;
  --line-2: #232C36;
  --text: #E6EBF1;
  --muted: #A3ACB8;
  --muted-2: #8b95a1;
  --muted-3: #7C8794;
  --dim: #6b7682;
  --teal: #22D3C5;
  --teal-bg: #0E1B1A;
  --teal-line: #1d4d47;
  --green: #2FBF71;
  --yellow: #E8B73A;
  --red: #E5564E;
  --blue: #6EA8FE;
  --purple: #B98AFF;
  --selection-text: #06231f;
  --button-primary-text: #06231f;
  --shadow-lg: rgba(0,0,0,0.7);
  --input-line: #313B46;
  --disabled-bg: #161C24;
  --disabled-fg: #4d5762;
  --chart-grid: #171E25;
  --chart-grid-strong: #2b343d;
  --chart-axis: #aab4c0;
  --chart-muted: #8A95A3;
  --chart-dim: #5b6672;
  --chart-ref-fill: rgba(34,211,197,0.12);
  --chart-hover: rgba(34,211,197,0.07);
  --tooltip-bg: rgba(13,18,24,0.97);
  --tooltip-border: #2b3742;
  --tooltip-shadow: rgba(0,0,0,0.7);
  --ref-line: #94A3B8;
  --current-marker: #fff;
  --current-marker-shadow: rgba(255,255,255,0.5);
  --meter-target-line: rgba(8,12,16,0.85);
  --meter-gradient: linear-gradient(to bottom,#E5564E 0%,#E8B73A 35%,#2FBF71 43%,#2FBF71 62%,#E8B73A 80%,#E5564E 100%);
  --diagram-bg: #0A0E13;
  --desc-strong: #cdd5de;
  --connector-line: #2A343E;
  --nested-tick: #3f4a56;
  --chip-text: #cdd5de;
  --error-bg: rgba(229,86,78,0.08);
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #F6F8FB;
  --panel: #FFFFFF;
  --panel-2: #FDFEFF;
  --line: #DDE5ED;
  --line-2: #C9D5E0;
  --text: #162231;
  --muted: #4F6072;
  --muted-2: #647386;
  --muted-3: #728297;
  --dim: #8795A7;
  --teal: #008F86;
  --teal-bg: #E7F8F5;
  --teal-line: #99DCD5;
  --green: #16885A;
  --yellow: #B77905;
  --red: #C43B36;
  --blue: #2563EB;
  --purple: #7C3AED;
  --selection-text: #F7FFFD;
  --button-primary-text: #F7FFFD;
  --shadow-lg: rgba(23,37,56,0.16);
  --input-line: #B7C4D2;
  --disabled-bg: #E8EDF3;
  --disabled-fg: #93A0B0;
  --chart-grid: #E8EEF5;
  --chart-grid-strong: #C5D1DE;
  --chart-axis: #415167;
  --chart-muted: #66768B;
  --chart-dim: #8390A1;
  --chart-ref-fill: rgba(0,143,134,0.12);
  --chart-hover: rgba(0,143,134,0.08);
  --tooltip-bg: rgba(255,255,255,0.98);
  --tooltip-border: #D3DDE8;
  --tooltip-shadow: rgba(23,37,56,0.18);
  --ref-line: #64748B;
  --current-marker: #111827;
  --current-marker-shadow: rgba(17,24,39,0.28);
  --meter-target-line: rgba(17,24,39,0.75);
  --diagram-bg: #F1F6FA;
  --desc-strong: #26384B;
  --connector-line: #B7C5D3;
  --nested-tick: #97A4B3;
  --chip-text: #2E3F52;
  --error-bg: rgba(196,59,54,0.08);
}

html { scroll-behavior: smooth; }
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.55;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  transition: background-color .2s ease, color .2s ease;
}

::selection { background: var(--teal); color: var(--selection-text); }

a { color: inherit; }
.hidden { display: none !important; }
:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

.theme-toggle {
  width: 34px;
  height: 34px;
  flex: none;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line-2);
  border-radius: 7px;
  background: var(--panel);
  color: var(--text);
  padding: 0;
  cursor: pointer;
  transition: background .18s ease, border-color .18s ease, color .18s ease, transform .18s ease;
}
.theme-toggle:hover { border-color: var(--teal-line); color: var(--teal); transform: translateY(-1px); }
.theme-icon {
  display: none;
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.theme-icon-dark { fill: currentColor; stroke: none; }
html[data-theme-mode="system"] .theme-icon-system,
html[data-theme-mode="light"] .theme-icon-light,
html[data-theme-mode="dark"] .theme-icon-dark { display: block; }

.wrap { max-width: 1140px; margin: 0 auto; padding-left: 28px; padding-right: 28px; }

.site-header {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1140px; margin: 0 auto; padding: 22px 28px;
  border-bottom: 1px solid var(--line);
}
.brand { min-width: 0; display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 6px; background: var(--panel);
  border: 1px solid var(--line-2); display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-weight: 600; font-size: 14px; color: var(--teal);
}
.brand-name { min-width: 0; font-family: var(--mono); font-size: 12px; letter-spacing: 0; color: var(--muted-3); }
.nav { display: flex; align-items: center; gap: 14px; font-size: 13.5px; color: var(--muted-3); }
.nav a { text-decoration: none; font-weight: 500; color: var(--text); }
.nav .source-link {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--teal); border: 1px solid var(--teal-line); background: var(--teal-bg);
  border-radius: 6px; padding: 7px 10px; line-height: 1;
}
.nav .source-link:hover { border-color: var(--teal); }
.github-icon { width: 16px; height: 16px; fill: currentColor; flex: none; }
.status-dot { display: flex; align-items: center; gap: 7px; }
.status-dot i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); }

.hero {
  max-width: 1140px; margin: 0 auto; padding: 64px 28px 36px;
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 52px; align-items: start;
}
.hero > * { min-width: 0; }
.eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: 0; color: var(--teal); text-transform: uppercase; margin-bottom: 20px; }
h1 { font-size: 48px; line-height: 1.08; font-weight: 600; letter-spacing: 0; margin-bottom: 22px; }
.lede { font-size: 18px; color: var(--muted); margin-bottom: 30px; max-width: 32em; overflow-wrap: break-word; text-wrap: pretty; }

.bullets { display: flex; flex-direction: column; gap: 14px; margin-bottom: 30px; }
.bullet { display: flex; gap: 13px; align-items: flex-start; }
.bullet > div { min-width: 0; }
.bullet .ck {
  width: 28px; height: 24px; flex: none; border-radius: 5px; background: var(--teal-bg);
  border: 1px solid var(--teal-line); color: var(--teal); display: flex; align-items: center;
  justify-content: center; font-family: var(--mono); font-size: 11px; margin-top: 2px;
}
.bullet b { color: var(--text); font-weight: 600; }
.bullet span.t { color: var(--muted-2); }

.pills { display: flex; gap: 8px; font-family: var(--mono); font-size: 12px; color: var(--muted-3); flex-wrap: wrap; }
.pill { background: var(--panel); border: 1px solid var(--line-2); border-radius: 4px; padding: 6px 11px; }

.card {
  min-width: 0; background: var(--panel); border: 1px solid var(--line-2); border-radius: 8px; padding: 24px;
  box-shadow: 0 24px 60px -30px var(--shadow-lg);
}
.card-head { min-width: 0; display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.card-head .title { font-size: 14px; font-weight: 600; }
.card-head .meta { min-width: 0; font-family: var(--mono); font-size: 11px; color: var(--dim); text-align: right; }

.dropzone {
  border: 1.5px dashed var(--input-line); border-radius: 8px; padding: 32px 20px; text-align: center;
  cursor: pointer; transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.drag { border-color: var(--teal); background: var(--teal-bg); }
.dropzone .ic {
  width: 44px; height: 44px; border-radius: 8px; background: var(--teal-bg); border: 1px solid var(--teal-line);
  display: flex; align-items: center; justify-content: center; margin: 0 auto 14px; color: var(--teal); font-size: 20px;
}
.dropzone .main { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.dropzone .main, .dropzone .sub { overflow-wrap: break-word; }
.dropzone .sub { font-family: var(--mono); font-size: 11.5px; color: var(--dim); }

.upload-constraints {
  margin-top: 12px; display: flex; flex-direction: column; gap: 7px;
  color: var(--muted-2); font-size: 12.5px; line-height: 1.4;
}
.upload-constraints p { margin: 0; }
.upload-constraints b { color: var(--text); font-weight: 600; }

.filechip {
  display: flex; align-items: center; gap: 13px; border: 1px solid var(--teal-line);
  border-radius: 8px; padding: 15px 17px; background: var(--teal-bg);
}
.filechip .badge {
  width: 38px; height: 38px; border-radius: 6px; background: var(--teal); display: flex; align-items: center;
  justify-content: center; color: var(--button-primary-text); font-family: var(--mono); font-size: 11px; font-weight: 600; flex: none;
}
.filechip-main { flex: 1; min-width: 0; }
.filechip .fname { font-size: 14px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.filechip .fmeta { font-family: var(--mono); font-size: 11px; color: var(--muted-3); }
.filechip .x { background: none; border: none; color: var(--muted-3); cursor: pointer; font-size: 18px; line-height: 1; padding: 4px; }
.filechip .x:hover { color: var(--red); }

.field-label { display: block; font-size: 12.5px; font-weight: 500; color: var(--muted-2); margin: 16px 0 8px; }
select.genre {
  width: 100%; appearance: none;
  background: var(--panel-2) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'><path d='M2 4l4 4 4-4' fill='none' stroke='%237C8794' stroke-width='1.5'/></svg>") no-repeat right 15px center;
  color: var(--text); border: 1px solid var(--input-line); border-radius: 7px; padding: 13px 15px;
  font-family: var(--sans); font-size: 14px; cursor: pointer;
}

.btn {
  width: 100%; margin-top: 16px; border: none; border-radius: 7px; padding: 15px;
  font-family: var(--sans); font-size: 15px; font-weight: 600; cursor: pointer; transition: filter .15s;
}
.btn-primary { background: var(--teal); color: var(--button-primary-text); }
.btn-primary:hover { filter: brightness(1.08); }
.btn-primary:disabled { background: var(--disabled-bg); color: var(--disabled-fg); border: 1px solid var(--line-2); cursor: not-allowed; filter: none; }

.form-error { margin-top: 14px; color: var(--red); font-size: 13px; }

.readout-sec { width: 100%; max-width: 1140px; margin: 0 auto; padding: 34px 28px 68px; }
.readout-sec h2 { font-size: 30px; font-weight: 600; letter-spacing: 0; margin-bottom: 8px; }
.readout-sec .sub { font-size: 16px; color: var(--muted); margin-bottom: 24px; max-width: 48em; text-wrap: pretty; }

.readout-card { min-width: 0; background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; padding: 24px; }
.readout-legend { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; margin-bottom: 16px; }
.legend-items { display: flex; align-items: center; gap: 20px; font-family: var(--mono); font-size: 12px; color: var(--chart-muted); }
.legend-items .li { display: flex; align-items: center; gap: 8px; }
.legend-items .li b { color: var(--text); font-weight: 400; }
.swatch-bar { width: 18px; height: 10px; background: var(--teal); border-radius: 2px; display: inline-block; }
.swatch-line { width: 18px; height: 0; border-top: 2px dashed var(--ref-line); display: inline-block; }
.swatch-current { width: 16px; height: 3px; background: var(--current-marker); display: inline-block; border-radius: 1px; }
.readout-hint { font-family: var(--mono); font-size: 11.5px; color: var(--chart-dim); }

.readout-grid { display: grid; grid-template-columns: minmax(0,1fr) 200px; gap: 24px; align-items: stretch; }
.readout-grid > * { min-width: 0; }
.chart-wrap { min-width: 0; position: relative; }
.chart-wrap svg { display: block; width: 100%; cursor: crosshair; overflow: visible; }
.chart-wrap svg text { font-family: var(--mono); }

.chart-tip {
  position: absolute; top: 4px; transform: translateX(-50%); pointer-events: none;
  background: var(--tooltip-bg); border: 1px solid var(--tooltip-border); border-radius: 6px; padding: 10px 13px;
  width: 188px; box-shadow: 0 8px 22px -10px var(--tooltip-shadow);
}
.chart-tip .h { font-family: var(--mono); font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.chart-tip .row { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; font-family: var(--mono); font-size: 11.5px; margin-bottom: 4px; }
.chart-tip .row.delta { border-top: 1px solid var(--tooltip-border); padding-top: 7px; margin-top: 4px; margin-bottom: 0; }
.tip-track { color: var(--teal); }
.tip-value { color: var(--text); }
.tip-ref { color: var(--ref-line); }
.tip-ref-value { color: var(--chart-axis); }
.tip-muted { color: var(--chart-muted); }
.delta-good, .delta-warn, .delta-bad { font-weight: 600; }
.delta-good { color: var(--green); }
.delta-warn { color: var(--yellow); }
.delta-bad { color: var(--red); }

.meter-col { min-width: 0; border-left: 1px solid var(--line); padding-left: 24px; display: flex; flex-direction: column; }
.meter-col .cap { font-family: var(--mono); font-size: 11px; letter-spacing: 0; text-transform: uppercase; color: var(--chart-muted); margin-bottom: 14px; }
.meter-row { display: flex; gap: 16px; flex: 1; }
.meter-bar { position: relative; width: 34px; border-radius: 5px; overflow: hidden; border: 1px solid var(--tooltip-border); flex: none; }
.meter-bar .target { position: absolute; left: -6px; right: -6px; border-top: 2px dashed var(--meter-target-line); }
.meter-bar .you { position: absolute; left: -4px; right: -4px; height: 3px; background: var(--current-marker); box-shadow: 0 0 0 1px var(--panel-2), 0 0 8px var(--current-marker-shadow); }
.meter-read { min-width: 0; flex: 1; display: flex; flex-direction: column; justify-content: center; gap: 16px; }
.meter-read .big { font-family: var(--mono); font-size: 23px; font-weight: 600; color: var(--text); line-height: 1; }
.meter-read .mid { font-family: var(--mono); font-size: 17px; font-weight: 600; color: var(--text); line-height: 1; }
.meter-read .lab { font-family: var(--mono); font-size: 10.5px; color: var(--chart-muted); margin-top: 3px; }
.meter-read .msg { font-size: 11.5px; margin-top: 6px; line-height: 1.35; }
.meter-read .blk2 { border-top: 1px solid var(--line); padding-top: 14px; }
.meter-foot { display: flex; flex-direction: column; gap: 5px; font-family: var(--mono); font-size: 10px; color: var(--dim); margin-top: 16px; border-top: 1px solid var(--line); padding-top: 12px; }
.meter-foot span { display: flex; align-items: center; gap: 6px; }

.verdict-bar { overflow-wrap: anywhere; background: var(--panel-2); border: 1px solid var(--line); border-left: 3px solid var(--teal); border-radius: 6px; padding: 16px 18px; margin-top: 18px; font-size: 14.5px; color: var(--text); }

.readings { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 18px; }
.reading { border: 1px solid var(--line); border-radius: 8px; padding: 20px; background: var(--panel-2); }
.reading .tag { display: flex; align-items: center; gap: 9px; margin-bottom: 9px; }
.reading .tag i { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.tag-dot-delivery { background: var(--green); }
.tag-dot-balance { background: var(--teal); }
.reading .tag span { font-family: var(--mono); font-size: 11px; letter-spacing: 0; text-transform: uppercase; color: var(--chart-muted); }
.reading h4 { font-size: 16px; font-weight: 600; margin-bottom: 5px; }
.reading p { font-size: 13.5px; color: var(--muted-2); text-wrap: pretty; }
.readout-note { font-family: var(--mono); font-size: 11.5px; color: var(--chart-dim); margin-top: 16px; }

.how { border-top: 1px solid var(--line); background: var(--panel-2); }
.how-inner { max-width: 1140px; margin: 0 auto; padding: 64px 28px; }
.how h2 { font-size: 32px; font-weight: 600; letter-spacing: 0; margin-bottom: 12px; }
.how p.lead { font-size: 16px; color: var(--muted); margin-bottom: 8px; max-width: 48em; text-wrap: pretty; }
.how p.lead b { color: var(--text); }
.how p.sub { font-size: 14px; color: var(--muted-3); margin-bottom: 40px; max-width: 48em; }

.diagram { border: 1px solid var(--line); border-radius: 8px; background: var(--diagram-bg); padding: 36px 24px 32px; margin-bottom: 44px; }
.diagram-col { display: flex; flex-direction: column; align-items: center; max-width: 680px; margin: 0 auto; }
.node { width: 100%; border: 1px solid var(--line-2); border-radius: 8px; background: var(--panel); padding: 17px 20px; display: flex; gap: 15px; align-items: flex-start; }
.node .accent { width: 5px; align-self: stretch; border-radius: 3px; flex: none; }
.accent-browser, .accent-report { background: var(--teal); }
.accent-api { background: var(--blue); }
.accent-queue { background: var(--yellow); }
.accent-worker { background: var(--purple); }
.accent-storage { background: var(--green); }
.node .body { flex: 1; }
.node .row1 { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 5px; }
.node .name { font-weight: 600; font-size: 16px; color: var(--text); }
.node .badge { font-family: var(--mono); font-size: 10px; letter-spacing: 0; color: var(--muted-3); border: 1px solid var(--line-2); border-radius: 4px; padding: 3px 8px; white-space: nowrap; flex: none; }
.node .desc { font-size: 13.5px; color: var(--muted-2); line-height: 1.45; }
.node .desc b { color: var(--desc-strong); font-weight: 400; }
.connector { display: flex; flex-direction: column; align-items: center; }
.connector .ln { width: 1.5px; height: 12px; background: var(--connector-line); }
.connector .ln-offset { margin-top: 7px; }
.connector .lbl { font-family: var(--mono); font-size: 10.5px; color: var(--chart-muted); background: var(--panel-2); border: 1px solid var(--line-2); border-radius: 6px; padding: 4px 12px; }
.connector .lbl.warn { color: var(--red); border-color: rgba(229,86,78,0.4); background: rgba(229,86,78,0.06); margin-top: 7px; }
.connector .arrow { width: 0; height: 0; border-left: 5px solid transparent; border-right: 5px solid transparent; border-top: 6px solid var(--connector-line); }
.nested { margin-top: 14px; display: flex; gap: 11px; align-items: stretch; }
.nested .tick { font-family: var(--mono); color: var(--nested-tick); font-size: 15px; padding-top: 13px; }
.nested .inner { flex: 1; border: 1px solid var(--teal-line); border-radius: 8px; background: var(--teal-bg); padding: 14px 16px; }
.nested .inner .name { font-size: 14.5px; }
.nested .inner .badge { color: var(--teal); border-color: var(--teal-line); }
.nested .inner .desc { font-size: 13px; }

.node .meta-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 11px; }
.node .meta-chips span { font-family: var(--mono); font-size: 10px; color: var(--muted-3); border: 1px solid var(--line-2); border-radius: 4px; padding: 3px 8px; background: var(--panel-2); }
.node .claim { margin-top: 11px; font-family: var(--mono); font-size: 11.5px; line-height: 1.45; color: var(--teal); border: 1px solid var(--teal-line); background: var(--teal-bg); border-radius: 6px; padding: 9px 12px; }
.node-split .split { margin-top: 13px; display: grid; grid-template-columns: 1fr 1fr; gap: 11px; }
.node-split .split .col { border: 1px solid var(--line-2); border-radius: 7px; background: var(--panel-2); padding: 12px 14px; }
.node-split .split .col .k { font-family: var(--mono); font-size: 11.5px; color: var(--green); margin-bottom: 5px; }
.node-split .split .col .k em { color: var(--muted-3); font-style: normal; font-size: 10px; }
.node-split .split .col .v { font-size: 12.5px; color: var(--muted-2); line-height: 1.4; }

.stack-head { font-family: var(--mono); font-size: 11px; letter-spacing: 0; text-transform: uppercase; color: var(--chart-muted); margin-bottom: 18px; }
.stack { border-top: 1px solid var(--line); padding-top: 32px; }
.stack-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 20px; }
.stack-grp .gl { font-size: 12px; font-weight: 600; color: var(--muted); margin-bottom: 10px; }
.stack-grp .gi { display: flex; flex-wrap: wrap; gap: 8px; }
.stack-grp .gi span { font-family: var(--mono); font-size: 12px; color: var(--chip-text); background: var(--panel); border: 1px solid var(--line-2); border-radius: 4px; padding: 6px 11px; }
.source-map { border-top: 1px solid var(--line); margin-top: 28px; padding-top: 24px; }
.source-map-head { font-family: var(--mono); font-size: 11px; text-transform: uppercase; color: var(--chart-muted); margin-bottom: 12px; }
.source-map-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.source-map-grid a {
  display: block; text-decoration: none; border: 1px solid var(--line-2); border-radius: 6px;
  background: var(--panel); padding: 12px; min-height: 86px;
}
.source-map-grid a:hover { border-color: var(--teal-line); background: var(--teal-bg); }
.src-k { display: block; font-family: var(--mono); font-size: 12px; color: var(--teal); margin-bottom: 7px; }
.src-v { display: block; font-size: 12.5px; line-height: 1.35; color: var(--muted-2); }

.site-footer { border-top: 1px solid var(--line); }
.site-footer .inner { max-width: 1140px; margin: 0 auto; padding: 32px 28px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px; font-family: var(--mono); font-size: 11.5px; color: var(--dim); }

.result-mode .how,
.result-mode .site-footer { display: none; }
.result-mode .hero { display: none; }
.result-mode .readout-sec {
  min-height: 100dvh;
  padding-top: clamp(34px, 6vh, 54px);
  padding-bottom: 96px;
}
.result-mode .readings { display: none; }
.result-mode .readout-note { display: none !important; }

.result-loading {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 18px; padding: 72px 20px;
}
.rl-spin {
  width: 32px; height: 32px; border-radius: 50%; flex: none;
  border: 2.5px solid var(--line-2); border-top-color: var(--teal);
  animation: spin 0.85s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.rl-status { font-family: var(--mono); font-size: 13px; color: var(--dim); }

.result-error {
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  padding: 64px 20px; text-align: center;
}
.re-ic {
  width: 46px; height: 46px; border-radius: 50%; display: flex; align-items: center;
  justify-content: center; background: var(--error-bg); border: 1px solid var(--red);
  color: var(--red); font-size: 22px;
}
.re-msg { color: var(--muted-2); font-size: 14.5px; max-width: 36em; }
.re-home { color: var(--teal); text-decoration: none; font-size: 13px; }
.re-home:hover { text-decoration: underline; }

.report-stack {
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.result-actions {
  display: flex; gap: 14px; align-items: center; flex-wrap: wrap;
  margin: 0;
}
.btn-pdf {
  display: inline-block; background: var(--teal); color: var(--button-primary-text); text-decoration: none;
  border-radius: 7px; padding: 13px 22px; font-weight: 600; font-size: 14px; transition: filter .15s;
}
.btn-pdf:hover { filter: brightness(1.08); }
.btn-again {
  background: none; border: 1px solid var(--line-2); border-radius: 7px; padding: 13px 22px;
  color: var(--muted); font-size: 14px; cursor: pointer; font-family: var(--sans); transition: border-color .15s, color .15s;
}
.btn-again:hover { border-color: var(--muted-3); color: var(--text); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 36px; padding-top: 44px; }
  h1 { font-size: 38px; }
  .readout-grid { grid-template-columns: 1fr; }
  .meter-col { border-left: none; border-top: 1px solid var(--line); padding-left: 0; padding-top: 20px; }
  .readings { grid-template-columns: 1fr; }
  .source-map-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .wrap, .hero, .readout-sec, .how-inner, .site-header, .site-footer .inner { padding-left: 18px; padding-right: 18px; }
  .site-header { gap: 12px; min-height: 76px; }
  .brand-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .nav { gap: 10px; }
  .nav a:not(.source-link) { display: none; }
  .nav .source-link { display: none; }
  .status-dot { display: none; }
  h1 { max-width: 100%; font-size: clamp(29px, 8vw, 32px); overflow-wrap: break-word; text-wrap: balance; }
  .readout-sec h2, .how h2 { font-size: 24px; }
  .readout-card { padding: 18px; }
  .result-mode .readout-sec { padding: 34px 12px 96px; }
  .result-mode .readout-card { padding: 14px; }
  .legend-items { align-items: flex-start; flex-direction: column; gap: 8px; }
  .readout-hint { display: none; }
  .chart-wrap {
    margin: 0;
    overflow: visible;
    padding: 0 0 8px;
  }
  .chart-wrap svg { min-width: 0; }
  .meter-row { min-height: 210px; }
  .result-actions { align-items: stretch; flex-direction: column; }
  .btn-pdf, .btn-again { text-align: center; width: 100%; }
  .source-map-grid { grid-template-columns: 1fr; }
  .node-split .split { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}