:root {
    --navy-950: #031329;
    --navy-900: #061a35;
    --navy-850: #092345;
    --navy-800: #0b2d58;
    --blue-700: #0d4f93;
    --blue-600: #156ec3;
    --blue-500: #2d8be0;
    --blue-300: #84c6ff;
    --blue-150: #d8edff;
    --blue-075: #edf7ff;
    --white: #ffffff;
    --ink: #10213a;
    --muted: #5b6d84;
    --line: #cbd9e8;
    --line-dark: rgba(255,255,255,.18);
    --gold: #eab54d;
    --gold-strong: #f3c863;
    --cyan: #61e8ff;
    --violet: #b29aff;
    --rose: #ff7d9b;
    --green: #0f9f74;
    --amber: #c67f0a;
    --red: #c64052;
    --shadow: 0 18px 50px rgba(3, 19, 41, .12);
    --radius: 20px;
    --radius-sm: 12px;
    --max: 1600px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background:
        radial-gradient(circle at 14% 4%, rgba(45,139,224,.12), transparent 28rem),
        linear-gradient(180deg, #f7fbff 0%, #edf5fc 100%);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.55;
}
body.modal-open { overflow: hidden; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
img, canvas { max-width: 100%; display: block; }
sub, sup { line-height: 0; }

.page-shell { min-height: 100vh; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 28px;
    min-height: 82px;
    padding: 14px clamp(22px, 4vw, 72px);
    color: var(--white);
    background: rgba(3, 19, 41, .96);
    border-bottom: 1px solid rgba(132,198,255,.24);
    box-shadow: 0 12px 30px rgba(0,0,0,.18);
    backdrop-filter: blur(18px);
}
.brand-lockup { display: flex; align-items: center; gap: 14px; min-width: max-content; }
.brand-mark {
    position: relative;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid rgba(132,198,255,.7);
    box-shadow: inset 0 0 18px rgba(97,232,255,.18), 0 0 20px rgba(45,139,224,.18);
}
.brand-mark::before {
    content: "";
    position: absolute;
    inset: 12px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--white) 0 12%, var(--cyan) 13% 34%, var(--blue-600) 35% 100%);
    box-shadow: 0 0 16px var(--cyan);
}
.brand-mark span { position: absolute; inset: 8px 2px; border: 1px solid rgba(132,198,255,.82); border-radius: 50%; }
.brand-mark span:nth-child(2) { transform: rotate(60deg); }
.brand-mark span:nth-child(3) { transform: rotate(-60deg); }
.eyebrow { margin: 0; font-size: 11px; font-weight: 800; letter-spacing: .2em; color: var(--white); }
.brand-subtitle { margin: 2px 0 0; font-size: 12px; color: var(--blue-300); }
.site-nav { display: flex; justify-content: center; gap: clamp(12px, 2vw, 32px); }
.site-nav a { text-decoration: none; font-size: 13px; font-weight: 650; color: #cfe7ff; transition: color .2s ease; }
.site-nav a:hover { color: var(--white); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 44px;
    padding: 0 19px;
    border: 1px solid transparent;
    border-radius: 9px;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .02em;
    text-decoration: none;
    cursor: pointer;
    transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
    color: var(--white);
    background: linear-gradient(135deg, var(--blue-600), var(--blue-700));
    box-shadow: 0 10px 24px rgba(13,79,147,.24);
}
.btn-primary:hover { box-shadow: 0 14px 28px rgba(13,79,147,.32); }
.btn-secondary { color: var(--blue-700); background: var(--white); border-color: #b8d2e9; }
.btn-small { min-height: 38px; padding: 0 14px; font-size: 12px; }
.btn-report { background: linear-gradient(135deg, #d99621, #f0bb50); color: #17233a; box-shadow: 0 10px 24px rgba(234,181,77,.22); }
.btn-icon { display: inline-flex; align-items: center; justify-content: center; min-width: 29px; height: 23px; border: 1px solid rgba(23,35,58,.35); border-radius: 4px; font-size: 9px; font-weight: 900; }

main { overflow: hidden; }
.hero-section {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, .92fr) minmax(520px, 1.08fr);
    align-items: stretch;
    min-height: 690px;
    color: var(--white);
    background:
        linear-gradient(115deg, rgba(3,19,41,.99) 0%, rgba(6,26,53,.98) 45%, rgba(7,39,78,.94) 100%),
        radial-gradient(circle at 76% 40%, rgba(45,139,224,.3), transparent 40rem);
    border-bottom: 1px solid rgba(132,198,255,.28);
}
.hero-section::after {
    content: "";
    position: absolute;
    inset: auto 0 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--cyan), transparent);
    opacity: .5;
}
.hero-copy { position: relative; z-index: 2; padding: clamp(70px, 8vw, 120px) 48px clamp(70px, 7vw, 100px) max(34px, calc((100vw - var(--max)) / 2 + 24px)); }
.status-row { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 30px; }
.status-pill { padding: 6px 10px; border: 1px solid rgba(132,198,255,.3); border-radius: 999px; font-size: 10px; font-weight: 800; letter-spacing: .08em; color: #cde9ff; background: rgba(255,255,255,.055); text-transform: uppercase; }
.status-verified { border-color: rgba(97,232,255,.52); color: var(--cyan); }
.status-preprint { border-color: rgba(234,181,77,.6); color: var(--gold-strong); }
.section-kicker { margin: 0 0 10px; font-size: 11px; font-weight: 850; letter-spacing: .22em; color: var(--blue-600); }
.hero-copy .section-kicker { color: var(--gold-strong); }
h1 { margin: 0; max-width: 760px; font-family: Georgia, "Times New Roman", serif; font-size: clamp(54px, 6.2vw, 96px); line-height: .95; letter-spacing: -.055em; }
.hero-deck { max-width: 730px; margin: 28px 0 0; font-size: clamp(17px, 1.5vw, 22px); line-height: 1.55; color: #d7eaff; }
.research-question { max-width: 760px; margin-top: 34px; padding: 20px 22px; background: rgba(255,255,255,.055); border: 1px solid rgba(132,198,255,.25); border-left: 3px solid var(--gold); border-radius: 0 12px 12px 0; }
.rq-label { display: block; margin-bottom: 5px; font-size: 10px; font-weight: 850; letter-spacing: .18em; color: var(--gold-strong); text-transform: uppercase; }
.research-question p { margin: 0; font-size: 15px; color: #e9f5ff; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-visual { position: relative; min-height: 620px; overflow: hidden; background: radial-gradient(circle at 54% 48%, rgba(45,139,224,.26), transparent 36%), linear-gradient(180deg, rgba(7,39,78,.45), rgba(3,19,41,.82)); border-left: 1px solid rgba(132,198,255,.14); }
.hero-visual::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(132,198,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(132,198,255,.05) 1px, transparent 1px); background-size: 42px 42px; mask-image: linear-gradient(to bottom, black, transparent 90%); }
#heroCanvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-legend { position: absolute; left: 30px; bottom: 30px; display: flex; flex-wrap: wrap; gap: 18px; font-size: 11px; color: #d7eaff; }
.hero-legend span { display: flex; align-items: center; gap: 7px; }
.legend-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; box-shadow: 0 0 12px currentColor; }
.legend-dot.beta { color: var(--cyan); background: var(--cyan); }
.legend-dot.gamma { color: var(--violet); background: var(--violet); }
.legend-dot.residual { color: var(--gold); background: var(--gold); }
.legend-line { width: 20px; height: 2px; background: var(--gold); box-shadow: 0 0 9px var(--gold); }
.hero-data-card { position: absolute; top: 34px; right: 34px; display: grid; gap: 2px; min-width: 190px; padding: 16px 18px; background: rgba(3,19,41,.74); border: 1px solid rgba(132,198,255,.28); border-radius: 10px; backdrop-filter: blur(14px); }
.hero-data-card span, .hero-data-card small { color: var(--blue-300); font-size: 11px; }
.hero-data-card strong { color: var(--white); font-size: 19px; }

.scope-strip { display: grid; grid-template-columns: 44px 1fr; gap: 18px; width: min(calc(100% - 48px), var(--max)); margin: -22px auto 0; position: relative; z-index: 3; padding: 22px 26px; background: var(--white); border: 1px solid #b9d2e8; border-radius: 12px; box-shadow: var(--shadow); }
.scope-icon { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; background: var(--blue-075); border: 1px solid var(--blue-300); color: var(--blue-700); font-family: Georgia, serif; font-size: 24px; font-style: italic; }
.scope-strip h2 { margin: 0 0 4px; font-size: 15px; color: var(--navy-900); }
.scope-strip p { margin: 0; font-size: 13px; color: var(--muted); }

.section-block { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; padding: 86px 0 0; }
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 28px; margin-bottom: 28px; }
.section-heading h2 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(34px, 3.6vw, 54px); line-height: 1.05; color: var(--navy-900); letter-spacing: -.035em; }
.section-heading > div > p:last-child { max-width: 820px; margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.heading-actions { display: flex; gap: 10px; flex-shrink: 0; }
.panel { background: rgba(255,255,255,.96); border: 1px solid #c7d8e8; border-radius: var(--radius); box-shadow: 0 14px 38px rgba(3,19,41,.08); }
.panel-header, .chart-header { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 19px 20px; border-bottom: 1px solid #d6e3ef; }
.panel-header > div, .chart-header > div { display: flex; align-items: center; gap: 10px; }
.panel-header h3, .chart-header h3 { margin: 0; color: var(--navy-900); font-size: 15px; }
.panel-index { display: inline-grid; place-items: center; min-width: 28px; height: 28px; padding: 0 7px; border-radius: 7px; background: var(--navy-900); color: var(--white); font-size: 10px; font-weight: 900; letter-spacing: .08em; }
.live-badge, .model-confidence, .chart-tag { font-size: 9px; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.live-badge { color: var(--green); }
.live-badge::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 6px; border-radius: 50%; background: var(--green); box-shadow: 0 0 9px rgba(15,159,116,.5); }
.model-confidence { padding: 5px 7px; border-radius: 4px; color: var(--blue-700); background: var(--blue-075); }

.workbench-grid { display: grid; grid-template-columns: 320px minmax(540px, 1fr) 330px; gap: 18px; align-items: stretch; }
.controls-panel, .diagnostics-panel { overflow: hidden; }
.controls-panel { padding-bottom: 18px; }
.field-group, .range-field { display: block; margin: 16px 18px 0; }
.field-label, .field-topline { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 7px; color: #425974; font-size: 11px; font-weight: 750; }
.field-topline output { color: var(--blue-700); font-size: 10px; font-weight: 850; }
select, input[type="number"], input[type="text"], textarea {
    width: 100%;
    border: 1px solid #bfd1e3;
    border-radius: 8px;
    color: var(--navy-900);
    background: #fbfdff;
    outline: none;
    transition: border .18s ease, box-shadow .18s ease;
}
select, input[type="number"], input[type="text"] { height: 42px; padding: 0 11px; }
textarea { padding: 12px; resize: vertical; }
select:focus, input:focus, textarea:focus { border-color: var(--blue-500); box-shadow: 0 0 0 3px rgba(45,139,224,.12); }
input[type="range"] { width: 100%; accent-color: var(--blue-600); }
.range-scale { display: flex; justify-content: space-between; margin-top: 3px; font-size: 8px; color: #8292a5; }
.critical-mark { color: var(--amber); font-weight: 800; }
.control-two-up { display: grid; grid-template-columns: 1fr 1fr; gap: 0; }
.control-two-up .field-group, .control-two-up .range-field { margin-right: 8px; }
.control-two-up .field-group:nth-child(2), .control-two-up .range-field:nth-child(2) { margin-left: 8px; margin-right: 18px; }
.range-field.compact .field-topline { font-size: 10px; }
.toggle-row { display: flex; align-items: center; gap: 9px; margin: 14px 18px 0; color: #52677e; font-size: 11px; cursor: pointer; }
.toggle-row input { position: absolute; opacity: 0; }
.toggle-ui { position: relative; width: 36px; height: 20px; border-radius: 999px; background: #bfd0df; transition: background .2s ease; }
.toggle-ui::after { content: ""; position: absolute; top: 3px; left: 3px; width: 14px; height: 14px; border-radius: 50%; background: var(--white); transition: transform .2s ease; box-shadow: 0 1px 4px rgba(0,0,0,.2); }
.toggle-row input:checked + .toggle-ui { background: var(--blue-600); }
.toggle-row input:checked + .toggle-ui::after { transform: translateX(16px); }

.viewport-panel { overflow: hidden; display: flex; flex-direction: column; min-width: 0; }
.viewport-header { background: linear-gradient(180deg, #fff, #f8fbfe); }
.viewport-tools { display: flex; gap: 6px; }
.icon-btn { min-height: 31px; padding: 0 10px; border: 1px solid #c6d7e6; border-radius: 7px; background: var(--white); color: #50657b; font-size: 9px; font-weight: 800; cursor: pointer; }
.icon-btn.active { color: var(--white); background: var(--blue-700); border-color: var(--blue-700); }
.viewport-wrap { position: relative; flex: 1; min-height: 620px; background: linear-gradient(160deg, #031329, #071f3e 60%, #0a315a); overflow: hidden; }
.viewport-wrap::after { content: ""; position: absolute; inset: 0; pointer-events: none; border: 1px solid rgba(132,198,255,.08); box-shadow: inset 0 0 70px rgba(0,0,0,.25); }
#latticeCanvas { width: 100%; height: 100%; }
.viewport-overlay { position: absolute; z-index: 3; display: grid; gap: 2px; padding: 10px 12px; border: 1px solid rgba(132,198,255,.18); background: rgba(3,19,41,.64); backdrop-filter: blur(8px); border-radius: 7px; }
.viewport-overlay span { color: #93badf; font-size: 8px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.viewport-overlay strong { color: var(--white); font-size: 11px; }
.viewport-overlay.top-left { top: 18px; left: 18px; }
.viewport-overlay.bottom-left { bottom: 18px; left: 18px; }
.viewport-overlay.bottom-right { bottom: 18px; right: 18px; text-align: right; }
.viewport-caption { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; padding: 13px 17px; border-top: 1px solid #d6e3ef; font-size: 9px; color: #61758c; }
.viewport-caption span { display: flex; align-items: center; gap: 6px; }
.viewport-caption em { margin-left: auto; color: #7f8fa0; }

.diagnostics-panel { padding-bottom: 18px; }
.mode-card { margin: 16px; padding: 17px; border-radius: 12px; color: var(--white); background: linear-gradient(145deg, var(--navy-900), var(--blue-800)); box-shadow: inset 0 0 30px rgba(97,232,255,.08); }
.mode-label { display: block; color: var(--blue-300); font-size: 9px; font-weight: 850; letter-spacing: .14em; text-transform: uppercase; }
.mode-card strong { display: block; margin-top: 6px; font-family: Georgia, serif; font-size: 23px; line-height: 1.05; }
.mode-card p { margin: 10px 0 0; font-size: 10px; color: #d3e8fa; }
.meter-card { margin: 0 16px 16px; padding: 13px; background: #f7fbff; border: 1px solid #d2e1ed; border-radius: 10px; }
.meter-topline { display: flex; justify-content: space-between; gap: 12px; font-size: 10px; color: #536a82; }
.meter-topline strong { color: var(--blue-700); font-size: 12px; }
.meter-track { height: 7px; margin-top: 9px; overflow: hidden; border-radius: 999px; background: #dce7f0; }
.meter-track span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--blue-500), var(--cyan)); box-shadow: 0 0 10px rgba(97,232,255,.45); }
.meter-card small { display: block; margin-top: 6px; color: #76889b; font-size: 9px; }
.metric-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 0 16px; }
.metric-grid article { min-height: 82px; padding: 11px; border: 1px solid #d5e2ed; border-radius: 9px; background: #fff; }
.metric-grid span, .metric-grid small { display: block; color: #78899a; font-size: 8px; }
.metric-grid strong { display: block; margin: 4px 0 2px; color: var(--navy-900); font-size: 15px; }
.regime-panel { margin: 14px 16px 0; padding: 12px 13px; border-top: 1px solid #d6e3ef; border-bottom: 1px solid #d6e3ef; }
.regime-panel h4 { margin: 0 0 8px; font-size: 10px; text-transform: uppercase; letter-spacing: .11em; color: var(--blue-700); }
.regime-row { display: flex; justify-content: space-between; gap: 10px; padding: 5px 0; font-size: 9px; color: #667a90; }
.regime-row strong { color: var(--navy-900); font-size: 8px; }
.diagnostic-note { margin: 14px 16px 0; padding: 12px 13px; border-left: 3px solid var(--gold); background: #fff9ec; border-radius: 0 8px 8px 0; }
.diagnostic-note span { font-size: 8px; font-weight: 900; letter-spacing: .14em; color: #98631a; text-transform: uppercase; }
.diagnostic-note p { margin: 4px 0 0; font-size: 9px; color: #6e5a39; }

.output-legend { display: flex; flex-wrap: wrap; gap: 14px; font-size: 10px; color: #667a90; }
.output-legend span { display: flex; align-items: center; gap: 6px; }
.legend-swatch { width: 18px; height: 3px; border-radius: 999px; }
.legend-swatch.published { background: var(--blue-600); }
.legend-swatch.model { background: var(--gold); }
.legend-swatch.boundary { background: repeating-linear-gradient(90deg, var(--red) 0 4px, transparent 4px 7px); }
.chart-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.chart-panel { min-width: 0; overflow: hidden; }
.chart-wide { grid-column: 1 / -1; }
.chart-header { padding: 15px 18px; }
.chart-tag { color: var(--blue-700); }
.chart-panel > canvas { width: 100%; height: 390px; background: linear-gradient(180deg, #ffffff, #f9fcff); }
.chart-wide > canvas { height: 420px; }
.figure-caption { margin: 0; padding: 12px 17px 15px; border-top: 1px solid #e0e9f1; color: #718296; font-size: 9px; }
.comparison-panel { grid-column: 1 / -1; overflow: hidden; }
.comparison-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: #dbe7f0; }
.comparison-grid > div { padding: 15px; background: #fff; }
.comparison-grid canvas { width: 100%; height: 180px; background: linear-gradient(160deg, #04162d, #0a315a); border-radius: 10px; }
.comparison-grid strong, .comparison-grid span { display: block; }
.comparison-grid strong { margin-top: 10px; color: var(--navy-900); font-size: 12px; }
.comparison-grid span { color: #78899a; font-size: 9px; }

.claim-grid { display: grid; grid-template-columns: 350px 1fr; gap: 20px; align-items: start; }
.source-figure { margin: 0; overflow: hidden; background: #061a35; border: 1px solid #c7d8e8; border-radius: var(--radius); box-shadow: var(--shadow); }
.source-figure img { width: 100%; max-height: 610px; object-fit: cover; object-position: top; }
.source-figure figcaption { padding: 14px 15px; color: #cfe7ff; font-size: 9px; }
.evidence-table-wrap { overflow: hidden; background: var(--white); border: 1px solid #c7d8e8; border-radius: var(--radius); box-shadow: var(--shadow); }
.evidence-table { width: 100%; border-collapse: collapse; }
.evidence-table th { padding: 15px 16px; text-align: left; color: var(--white); background: var(--navy-900); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
.evidence-table td { padding: 15px 16px; border-bottom: 1px solid #dfe8f0; vertical-align: middle; font-size: 11px; color: #445a70; }
.evidence-table tr:last-child td { border-bottom: 0; }
.evidence-table td:first-child { color: var(--navy-900); font-weight: 650; }
.evidence { display: inline-flex; align-items: center; min-height: 24px; padding: 0 8px; border-radius: 999px; font-size: 8px; font-weight: 900; letter-spacing: .05em; text-transform: uppercase; white-space: nowrap; }
.evidence.supported { color: #087454; background: #daf6ec; }
.evidence.incorrect, .evidence.unsupported { color: #9c2637; background: #ffe1e6; }
.evidence.qualified { color: #8a5b11; background: #fff0cd; }
.evidence.open { color: #2f5490; background: #e4efff; }

.equation-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.equation-card { position: relative; min-height: 315px; padding: 22px; overflow: hidden; }
.equation-card::after { content: ""; position: absolute; right: -26px; top: -26px; width: 110px; height: 110px; border: 1px solid rgba(45,139,224,.12); border-radius: 50%; box-shadow: 0 0 0 18px rgba(45,139,224,.04), 0 0 0 38px rgba(45,139,224,.025); }
.eq-number { color: var(--gold); font-size: 10px; font-weight: 900; letter-spacing: .14em; }
.equation-card h3 { margin: 7px 0 18px; color: var(--navy-900); font-size: 15px; }
.equation-card math { min-height: 76px; font-size: 22px; color: var(--blue-700); overflow-x: auto; }
.equation-card code { display: block; padding: 10px; border-radius: 7px; background: #f1f6fb; color: #334e69; font-size: 9px; overflow-wrap: anywhere; }
.equation-card p { margin: 13px 0 0; color: #687c91; font-size: 10px; }
.reference-list { overflow: hidden; }
.reference-list article { display: grid; grid-template-columns: 44px 1fr; gap: 15px; padding: 17px 20px; border-bottom: 1px solid #dce6ef; }
.reference-list article:last-child { border-bottom: 0; }
.reference-list article > span { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 8px; color: var(--white); background: var(--navy-900); font-size: 9px; font-weight: 900; }
.reference-list p { margin: 0; color: #4e647a; font-size: 11px; }
.reference-list strong { color: var(--navy-900); }

.pdf-viewer { overflow: hidden; padding: 8px; background: #dce8f2; }
.pdf-viewer iframe { width: 100%; height: 860px; border: 0; border-radius: 12px; background: #fff; }
.comments-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 18px; }
.comment-form { padding: 22px; }
.comment-form .field-group, .comment-form .control-two-up .field-group { margin-top: 0; margin-left: 0; margin-right: 0; }
.comment-form > .field-group { margin-top: 15px; }
.comment-form .control-two-up { gap: 14px; }
.form-footer { display: flex; justify-content: space-between; align-items: center; gap: 14px; margin-top: 16px; }
.form-footer p { margin: 0; color: var(--muted); font-size: 10px; }
.comments-list-panel { overflow: hidden; }
.comments-list-panel > .panel-header > span { color: var(--muted); font-size: 10px; }
.comments-list { max-height: 520px; overflow: auto; }
.comment-card { padding: 17px 19px; border-bottom: 1px solid #dce6ef; }
.comment-card:last-child { border-bottom: 0; }
.comment-card header { display: flex; justify-content: space-between; gap: 16px; }
.comment-card strong { color: var(--navy-900); font-size: 12px; }
.comment-card small { color: #7b8da0; font-size: 8px; }
.comment-card .affiliation { display: block; color: var(--blue-700); font-size: 9px; }
.comment-card p { margin: 10px 0 0; color: #4e6378; font-size: 10px; white-space: pre-wrap; }
.comment-card a { display: inline-block; margin-top: 9px; color: var(--blue-700); font-size: 9px; word-break: break-all; }
.empty-state { margin: 0; padding: 40px 20px; text-align: center; color: #8191a2; font-size: 11px; }

.site-footer { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 32px; margin-top: 90px; padding: 32px max(24px, calc((100vw - var(--max)) / 2 + 24px)); color: #cfe7ff; background: var(--navy-950); border-top: 1px solid rgba(132,198,255,.2); }
.site-footer p { margin: 0; text-align: center; font-size: 10px; }
.site-footer a { color: var(--blue-300); font-size: 10px; text-decoration: none; }
.footer-brand .brand-mark { width: 36px; height: 36px; }

.modal-backdrop { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; padding: 24px; background: rgba(2, 11, 24, .78); backdrop-filter: blur(10px); }
.modal-backdrop[hidden] { display: none; }
.report-modal { position: relative; width: min(540px, 100%); padding: 34px; color: var(--ink); background: #fff; border: 1px solid #8fb9dc; border-radius: 20px; box-shadow: 0 30px 90px rgba(0,0,0,.34); text-align: center; overflow: hidden; }
.report-modal::before, .report-modal::after { content: ""; position: absolute; pointer-events: none; }
.report-modal::before { inset: 10px; border: 1px solid #c6d9e9; border-radius: 13px; }
.report-modal::after { left: 0; right: 0; top: 0; height: 7px; background: linear-gradient(90deg, var(--navy-900), var(--blue-500), var(--gold)); }
.modal-close { position: absolute; z-index: 3; top: 16px; right: 17px; width: 34px; height: 34px; border: 1px solid #c9d7e4; border-radius: 50%; background: #fff; color: #4e647a; cursor: pointer; }
.report-seal { position: relative; z-index: 2; display: grid; place-items: center; width: 72px; height: 72px; margin: 4px auto 18px; border: 2px solid var(--gold); border-radius: 50%; color: var(--gold); background: var(--navy-900); font-family: Georgia, serif; font-size: 24px; box-shadow: 0 0 0 6px #e9f2fa, 0 10px 25px rgba(3,19,41,.18); }
.report-modal h2 { position: relative; z-index: 2; margin: 0; font-family: Georgia, serif; font-size: 31px; color: var(--navy-900); }
.report-modal > p { position: relative; z-index: 2; color: var(--muted); font-size: 12px; }
.progress-track { position: relative; z-index: 2; height: 12px; margin-top: 24px; overflow: hidden; border-radius: 999px; background: #e3edf5; }
.progress-track span { display: block; height: 100%; width: 0; border-radius: inherit; background: linear-gradient(90deg, var(--blue-700), var(--blue-500), var(--cyan)); transition: width .35s ease; }
.progress-meta { position: relative; z-index: 2; display: flex; justify-content: space-between; margin-top: 8px; color: #63788e; font-size: 10px; }
.progress-meta strong { color: var(--blue-700); }
.report-ready { position: relative; z-index: 2; margin-top: 22px; padding-top: 20px; border-top: 1px solid #dbe6ef; }
.report-ready[hidden] { display: none; }
.ready-check { display: grid; place-items: center; width: 42px; height: 42px; margin: 0 auto 10px; border-radius: 50%; color: #fff; background: var(--green); font-size: 20px; }
.report-ready h3 { margin: 0; color: var(--navy-900); }
.report-ready p { margin: 7px auto 16px; max-width: 420px; color: var(--muted); font-size: 10px; }

@media (max-width: 1280px) {
    .site-nav { display: none; }
    .site-header { grid-template-columns: 1fr auto; }
    .hero-section { grid-template-columns: 1fr 1fr; }
    .workbench-grid { grid-template-columns: 280px minmax(480px, 1fr); }
    .diagnostics-panel { grid-column: 1 / -1; }
    .diagnostics-panel .metric-grid { grid-template-columns: repeat(6, 1fr); }
    .diagnostics-panel .mode-card, .diagnostics-panel .meter-card, .diagnostics-panel .regime-panel, .diagnostics-panel .diagnostic-note { margin-left: 18px; margin-right: 18px; }
}

@media (max-width: 980px) {
    .hero-section { grid-template-columns: 1fr; }
    .hero-copy { padding-right: 30px; }
    .hero-visual { min-height: 560px; border-left: 0; border-top: 1px solid rgba(132,198,255,.14); }
    .workbench-grid { grid-template-columns: 1fr; }
    .viewport-panel { min-height: 720px; }
    .diagnostics-panel .metric-grid { grid-template-columns: repeat(3, 1fr); }
    .chart-grid { grid-template-columns: 1fr; }
    .chart-wide, .comparison-panel { grid-column: auto; }
    .comparison-grid { grid-template-columns: 1fr 1fr; }
    .claim-grid { grid-template-columns: 280px 1fr; }
    .equation-grid { grid-template-columns: 1fr 1fr; }
    .comments-grid { grid-template-columns: 1fr; }
    .site-footer { grid-template-columns: 1fr; justify-items: center; text-align: center; }
}

@media (max-width: 720px) {
    .site-header { position: relative; padding: 12px 16px; }
    .site-header .btn-report { min-width: 44px; padding: 0 10px; font-size: 0; }
    .site-header .btn-report .btn-icon { font-size: 9px; }
    .brand-subtitle { display: none; }
    .hero-copy { padding: 56px 24px 50px; }
    .hero-visual { min-height: 480px; }
    .hero-data-card { top: 20px; right: 20px; min-width: 160px; }
    .hero-legend { left: 20px; right: 20px; bottom: 20px; }
    .scope-strip, .section-block { width: min(calc(100% - 28px), var(--max)); }
    .scope-strip { grid-template-columns: 1fr; }
    .section-block { padding-top: 66px; }
    .section-heading { align-items: flex-start; flex-direction: column; }
    .heading-actions { width: 100%; }
    .heading-actions .btn { flex: 1; }
    .viewport-wrap { min-height: 500px; }
    .viewport-caption em { width: 100%; margin-left: 0; }
    .diagnostics-panel .metric-grid { grid-template-columns: 1fr 1fr; }
    .comparison-grid { grid-template-columns: 1fr; }
    .claim-grid { grid-template-columns: 1fr; }
    .source-figure img { max-height: 500px; object-fit: contain; }
    .evidence-table-wrap { overflow-x: auto; }
    .evidence-table { min-width: 740px; }
    .equation-grid { grid-template-columns: 1fr; }
    .pdf-viewer iframe { height: 620px; }
    .control-two-up { grid-template-columns: 1fr; gap: 0; }
    .control-two-up .field-group, .control-two-up .range-field, .control-two-up .field-group:nth-child(2), .control-two-up .range-field:nth-child(2) { margin-left: 18px; margin-right: 18px; }
    .comment-form .control-two-up .field-group, .comment-form .control-two-up .field-group:nth-child(2) { margin-left: 0; margin-right: 0; }
    .report-modal { padding: 30px 23px; }
}