/* TFoB editorial revision — frequency, paper surfaces, compact sections */
:root {
    --paper: #efede4;
    --paper-ink: #17171a;
    --paper-muted: #55545c;
    --paper-rule: rgba(23, 23, 26, 0.16);
    --arch-ha: #f2efe6;
    --arch-aos: #c8ff00;
    --arch-ia: #7fa3a8;
}

/* Type floor */
.nav-links a, .nav-cta { font-size: 0.875rem; }
.btn-primary, .btn-secondary { font-size: 1rem; }
.section-subtitle { font-size: 1.0625rem; }
.section-eyebrow { font-size: 0.875rem; letter-spacing: 0.16em; }
.architecture-layer-intro, .architecture-layer li { font-size: 1rem !important; line-height: 1.6; }
.architecture-layer-number, .architecture-bridge { font-size: 0.875rem !important; }
.architecture-layer h4 { font-size: 1.35rem !important; }
.architecture-system-rule span, .architecture-system-rule strong { font-size: 1rem !important; }
.advisor-bio { font-size: 1rem !important; line-height: 1.65 !important; }
.advisor-role, .advisor-strengths-label, .advisor-experience-label, .cs-name, .company-tag { font-size: 0.875rem !important; }
.form-group label, .form-note, .opt { font-size: 0.9375rem; }
.form-group input, .form-group select, .form-group textarea { font-size: 1rem; }
.rv-body { font-size: 1.0625rem; line-height: 1.75; color: var(--text-secondary); margin-bottom: var(--space-5); max-width: 40rem; }
.rv-muted { color: var(--text-muted); }
.rv-accent { color: var(--accent); }

/* Override older, more-specific compact text rules retained in the base page. */
.join-text .rv-body, .rv-build-note, .form-note, .footer-founder,
.footer-copy, .footer-desc { font-size: 1rem !important; }
.hero-eyebrow, .signal-label, .signal-label-link, .signal-detail,
.signals-status, .signals-subtitle, .signals-updated, .signals-meta,
.signals-title, .signals-week, .signals-auto-tag,
.ticker-label, .rv-paper-tag, .footer-links a {
    font-size: 0.875rem !important;
}

/* Hero: note now lives in the left column; signals shell only when valid */
.rv-build-note { font-size: 0.9375rem; max-width: 36rem; margin-top: var(--space-10); }
.hero:not(.hero--signals) .hero-body { grid-template-columns: minmax(0, 1fr); }
.hero:not(.hero--signals) .hero-left { max-width: 900px; }
.hero-right[hidden] { display: none !important; }
@media (max-width: 1024px) {
    .hero.hero--signals .hero-right { display: block; }
}
.signals-status:empty { display: none; }

/* ============ THE SHIFT / FREQUENCY ============ */
.rv-shift {
    position: relative;
    padding: var(--space-24) var(--space-8);
    background:
        radial-gradient(ellipse 60% 50% at 85% 10%, rgba(200,255,0,0.05), transparent 70%),
        #070708;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    overflow: hidden;
}
.rv-shift-inner { max-width: 1200px; margin: 0 auto; }
.rv-shift-head {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: var(--space-16);
    align-items: end;
    margin-bottom: var(--space-16);
}
.rv-display {
    font-family: var(--font-heading);
    font-size: clamp(2.4rem, 5.4vw, 4.4rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.02;
}
.rv-shift-lede p { font-size: 1.0625rem; line-height: 1.75; color: var(--text-secondary); margin-bottom: var(--space-4); }
.rv-shift-lede .rv-kicker-line {
    font-family: var(--font-heading);
    font-size: 1.6rem; font-weight: 700; color: var(--accent);
    letter-spacing: -0.02em; margin-bottom: var(--space-5);
}

.freq { margin: 0; }
.freq-scope {
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: var(--space-6) 0;
    background-image: linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: calc(100% / 12) 100%;
}
.freq-row {
    display: grid;
    grid-template-columns: 15rem minmax(0, 1fr);
    align-items: center;
    gap: var(--space-6);
    min-height: 84px;
}
.freq-label {
    font-size: 0.875rem; color: var(--text-muted); letter-spacing: 0.04em;
    display: flex; flex-direction: column; line-height: 1.3;
}
.freq-label b { color: var(--text-primary); font-weight: 600; font-family: var(--font-heading); font-size: 1rem; }
.freq-svg { width: 100%; height: 100%; overflow: hidden; display: block; }
.freq-wave { fill: none; stroke-width: 2; vector-effect: non-scaling-stroke; }
.freq-wave--ext { stroke: var(--accent); }
.freq-wave--org { stroke: rgba(250,250,250,0.45); stroke-dasharray: 1 0; }
.freq-wave--fit { stroke: var(--arch-ha); stroke-dasharray: 6 6; opacity: 0.85; }
.freq-wave-move { animation: freq-slide 6s linear infinite; }
@keyframes freq-slide { from { transform: translateX(0); } to { transform: translateX(-1200px); } }

.freq-loop {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    position: relative;
    margin-top: var(--space-12);
}
.freq-loop::before {
    content: '';
    position: absolute; left: 0; right: 0; top: 11px; height: 1px;
    background: linear-gradient(90deg, var(--accent), rgba(200,255,0,0.25) 50%, var(--accent));
}
.freq-loop li { position: relative; padding: var(--space-10) var(--space-3) 0 0; }
.freq-loop li::before {
    content: ''; position: absolute; top: 5px; left: 0;
    width: 13px; height: 13px; border-radius: 50%;
    background: #070708; border: 2px solid var(--arch-color, var(--text-muted));
}
.freq-loop li[data-arch="ha"] { --arch-color: var(--arch-ha); }
.freq-loop li[data-arch="aos"] { --arch-color: var(--arch-aos); }
.freq-loop li[data-arch="ia"] { --arch-color: var(--arch-ia); }
.freq-loop li.freq-end::before { background: var(--accent); border-color: var(--accent); }
.freq-n { display: block; font-size: 0.875rem; color: var(--arch-color, var(--accent)); font-weight: 600; letter-spacing: 0.08em; margin-bottom: var(--space-2); }
.freq-loop strong { display: block; font-family: var(--font-heading); font-size: 1.15rem; font-weight: 700; letter-spacing: -0.01em; margin-bottom: var(--space-1); }
.freq-loop em { display: block; font-style: normal; font-size: 0.9375rem; color: var(--text-muted); line-height: 1.45; }
.freq-loop li.freq-end--out { padding-right: 0; }

.freq-map {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: var(--space-12);
    border-top: 1px solid var(--border);
}
.freq-map-item { padding: var(--space-6) var(--space-6) 0 0; }
.freq-map-item + .freq-map-item { padding-left: var(--space-6); border-left: 1px solid var(--border-subtle); }
.freq-map-item[data-arch="ha"] { --arch-color: var(--arch-ha); }
.freq-map-item[data-arch="aos"] { --arch-color: var(--arch-aos); }
.freq-map-item[data-arch="ia"] { --arch-color: var(--arch-ia); }
.freq-swatch { display: inline-block; width: 28px; height: 3px; background: var(--arch-color); margin-bottom: var(--space-3); }
.freq-map-item strong { display: block; font-family: var(--font-heading); font-size: 1.1rem; margin-bottom: var(--space-2); }
.freq-map-item p { font-size: 1rem; color: var(--text-secondary); line-height: 1.6; }
.freq-caption { margin-top: var(--space-8); font-size: 0.9375rem; color: var(--text-muted); }

.rv-gap {
    margin-top: var(--space-16);
    padding-top: var(--space-8);
    border-top: 1px solid var(--accent-border);
    display: grid;
    grid-template-columns: 12rem minmax(0, 1fr);
    gap: var(--space-8);
}
.rv-gap-k { font-size: 0.875rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--accent); font-weight: 700; padding-top: 0.5rem; }
.rv-gap p { font-family: var(--font-heading); font-size: clamp(1.35rem, 2.4vw, 1.9rem); line-height: 1.3; letter-spacing: -0.02em; max-width: 46rem; }

/* Architecture: connected mechanism and mobile spine */
.rv-arch { margin-top: var(--space-6); }
@media (max-width: 900px) {
    .rv-arch .architecture-grid { padding-left: var(--space-6); border-left: 2px solid var(--accent-border); }
    .rv-arch .architecture-layer { position: relative; }
    .rv-arch .architecture-layer::after {
        content: ''; position: absolute; left: calc(-1 * var(--space-6) - 7px); top: 6px;
        width: 12px; height: 12px; border-radius: 50%; background: var(--accent);
    }
    .rv-arch .architecture-layer--operating::before,
    .rv-arch .architecture-layer--operating::after { display: none; }
    .rv-arch .architecture-layer--operating { margin-left: 0; }
}

/* ============ WORKING PAPER ============ */
.rv-paper {
    background: var(--paper);
    color: var(--paper-ink);
    padding: var(--space-20) var(--space-8);
    position: relative;
}
.rv-paper::before {
    content: ''; position: absolute; inset: 0; pointer-events: none;
    background-image: repeating-linear-gradient(0deg, transparent 0 31px, rgba(23,23,26,0.05) 31px 32px);
}
.rv-paper-inner { max-width: 1200px; margin: 0 auto; position: relative;
    display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: var(--space-16); }
.rv-paper-tag {
    display: inline-block; font-size: 0.875rem; letter-spacing: 0.08em; text-transform: uppercase;
    color: var(--paper-muted); border: 1px dashed var(--paper-rule); padding: 0.2rem 0.6rem; margin-bottom: var(--space-5);
}
.rv-paper-head h2 { font-family: var(--font-heading); font-size: clamp(1.9rem, 3.6vw, 2.6rem); letter-spacing: -0.03em; line-height: 1.1; margin-bottom: var(--space-5); }
.rv-paper-head p { font-size: 1.0625rem; line-height: 1.7; color: var(--paper-muted); max-width: 30rem; font-style: italic; }
.rv-lens-list { border-top: 1px solid var(--paper-ink); }
.rv-lens-list > div { display: grid; grid-template-columns: 4.5rem minmax(0,1fr); gap: var(--space-4); padding: var(--space-4) 0; border-bottom: 1px solid var(--paper-rule); align-items: baseline; }
.rv-lens-list dt { font-family: var(--font-heading); font-weight: 700; font-size: 1.35rem; letter-spacing: -0.01em; }
.rv-lens-list dd { font-size: 1.0625rem; color: var(--paper-ink); }

/* ============ PROVING GROUND ============ */
.rv-proving-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-16); align-items: start; }
.rv-tests { list-style: none; border-left: 1px solid var(--border-hover); }
.rv-tests li { padding: var(--space-5) 0 var(--space-5) var(--space-8); position: relative; border-bottom: 1px solid var(--border-subtle); }
.rv-tests li::before { content: ''; position: absolute; left: -5px; top: calc(var(--space-5) + 0.5rem); width: 9px; height: 9px; background: var(--accent); border-radius: 50%; }
.rv-tests span { font-size: 0.875rem; color: var(--text-muted); letter-spacing: 0.08em; text-transform: uppercase; }
.rv-tests strong { display: block; font-family: var(--font-heading); font-size: 1.5rem; margin: 0.15rem 0 0.35rem; letter-spacing: -0.02em; }
.rv-tests p { font-size: 1rem; color: var(--text-secondary); line-height: 1.6; }

/* ============ METHOD ============ */
.rv-method { background: var(--bg-secondary); }
.rv-motions { list-style: none; display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); border-top: 1px solid var(--border-hover); margin-top: var(--space-8); }
.rv-motions li { padding: var(--space-6) var(--space-6) 0 0; position: relative; }
.rv-motions li + li { padding-left: var(--space-6); }
.rv-motions li::before { content: ''; position: absolute; top: -4px; left: 0; width: 7px; height: 7px; border-radius: 50%; background: var(--text-muted); }
.rv-motions li + li::before { left: var(--space-6); }
.rv-motions li.is-final::before { background: var(--accent); }
.rv-motion-n { font-size: 0.875rem; color: var(--text-muted); letter-spacing: 0.08em; }
.rv-motions strong { display: block; font-family: var(--font-heading); font-size: 1.5rem; margin: var(--space-2) 0; letter-spacing: -0.02em; }
.rv-motions li.is-final strong { color: var(--accent); }
.rv-motions p { font-size: 1rem; color: var(--text-secondary); line-height: 1.6; }

/* ============ TRUST ============ */
.rv-trust-grid { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: var(--space-16); }
.rv-h3 { font-family: var(--font-heading); font-size: clamp(1.7rem, 3vw, 2.3rem); letter-spacing: -0.03em; line-height: 1.15; margin-bottom: var(--space-5); }
.rv-trust-rows > div { display: grid; grid-template-columns: 11rem minmax(0,1fr); gap: var(--space-6); padding: var(--space-5) 0; border-bottom: 1px solid var(--border); }
.rv-trust-rows > div:first-child { border-top: 1px solid var(--border); }
.rv-trust-rows small { font-size: 0.875rem; color: var(--accent); letter-spacing: 0.06em; text-transform: uppercase; font-weight: 600; padding-top: 0.2rem; }
.rv-trust-rows strong { font-size: 1.0625rem; font-weight: 500; line-height: 1.55; }

/* ============ FIRM ============ */
.rv-human-note {
    background: var(--paper); color: var(--paper-ink);
    padding: var(--space-6) var(--space-8); margin: var(--space-10) 0 var(--space-12);
    display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--space-8); align-items: baseline;
}
.rv-human-note .rv-paper-tag { margin-bottom: 0; }
.rv-human-note p { font-size: 1.0625rem; line-height: 1.65; }
.advisor-role .lens-k { display: block; color: var(--text-muted); font-weight: 500; letter-spacing: 0.04em; margin-bottom: 0.2rem; }

/* ============ CLOSE / FORM ============ */
.rv-paths { margin: var(--space-6) 0; border-top: 1px solid var(--border); }
.rv-paths > div { padding: var(--space-5) 0; border-bottom: 1px solid var(--border); }
.rv-paths span { font-size: 0.875rem; color: var(--accent); letter-spacing: 0.08em; text-transform: uppercase; }
.rv-paths strong { display: block; font-family: var(--font-heading); font-size: 1.3rem; margin: 0.2rem 0; }
.rv-paths p { font-size: 1rem; color: var(--text-secondary); }
.rv-choice { border: 0; margin-bottom: var(--space-5); display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.rv-choice legend { font-size: 0.9375rem; color: var(--text-secondary); margin-bottom: var(--space-3); font-weight: 500; }
.rv-choice-opt { position: relative; cursor: pointer; }
.rv-choice-opt input { position: absolute; opacity: 0; inset: 0; cursor: pointer; }
.rv-choice-opt span {
    display: block; padding: var(--space-4); border: 1px solid var(--border-hover); border-radius: var(--radius-md);
    font-size: 1rem; transition: border-color var(--duration-fast), background var(--duration-fast); height: 100%;
}
.rv-choice-opt input:checked + span { border-color: var(--accent); background: var(--accent-dim); }
.rv-choice-opt input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.rv-form-error {
    margin: var(--space-4) 0; padding: 14px 18px; background: rgba(239,68,68,0.08);
    border: 1px solid rgba(239,68,68,0.3); border-radius: 10px; color: #f87171; font-size: 0.9375rem; line-height: 1.5;
}
.rv-form-error a { color: #fecaca; text-decoration: underline; }
.form-group input[aria-invalid="true"] { border-color: rgba(239,68,68,0.6); }
.form-submit[disabled] { opacity: 0.7; cursor: progress; transform: none !important; }
.form-note a, .footer-founder a { text-decoration: underline; text-underline-offset: 3px; }

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
    .freq-loop { grid-template-columns: repeat(3, minmax(0,1fr)); row-gap: var(--space-8); }
    .freq-loop::before { display: none; }
}
@media (max-width: 900px) {
    .rv-shift-head, .rv-paper-inner, .rv-proving-grid, .rv-trust-grid { grid-template-columns: 1fr; gap: var(--space-8); }
    .rv-motions { grid-template-columns: 1fr 1fr; row-gap: var(--space-8); }
    .rv-motions li + li { padding-left: 0; }
    .rv-motions li + li::before { left: 0; }
    .freq-map { grid-template-columns: 1fr; }
    .freq-map-item + .freq-map-item { padding-left: 0; border-left: 0; }
}
@media (max-width: 768px) {
    .rv-shift { padding: var(--space-16) var(--space-6); }
    .rv-paper { padding: var(--space-16) var(--space-6); }
    .freq-row { grid-template-columns: 1fr; gap: var(--space-1); height: auto; padding: var(--space-2) 0; } .freq-svg { height: 44px; }
    .freq-loop { grid-template-columns: 1fr; row-gap: 0; padding-left: var(--space-6); border-left: 1px solid var(--accent-border); margin-left: 6px; }
    .freq-loop li { padding: 0 0 var(--space-5) 0; }
    .freq-loop li::before { left: calc(-1 * var(--space-6) - 7px); top: 4px; }
    .rv-gap { grid-template-columns: 1fr; gap: var(--space-3); }
    .rv-trust-rows > div { grid-template-columns: 1fr; gap: var(--space-2); }
    .rv-human-note { grid-template-columns: 1fr; gap: var(--space-3); padding: var(--space-6); }
    .rv-choice { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .rv-motions { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
    .freq-wave-move { animation: none; }
}
button.nav-mobile-toggle { background: none; border: 0; }

/* Human observations stay within the ideas they inform, not standalone panels. */
.workshop-voices {
    margin-top: var(--space-8); padding: var(--space-5) 0;
    border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.workshop-voices h4, .helm-principle h3 {
    color: var(--accent); font-size: 0.875rem; font-weight: 600;
    letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: var(--space-4);
}
.workshop-voice-lines { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-6); }
.workshop-voice-lines blockquote { margin: 0; font-size: 1rem; line-height: 1.6; color: var(--text-secondary); }
.helm-principle {
    display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-8);
    border-top: 1px solid var(--accent-border); margin-top: var(--space-8); padding-top: var(--space-6);
}
.helm-principle p, .motion-continuity { font-size: 1rem; line-height: 1.65; color: var(--text-secondary); }
.helm-progression { display: flex; flex-wrap: wrap; gap: 0.5rem 0.75rem; list-style: none; padding: 0; margin: 0 0 var(--space-4); }
.helm-progression li { font-size: 1rem; line-height: 1.6; }
.helm-progression li:not(:last-child)::after { content: ' →'; color: var(--accent); margin-left: 0.75rem; }
.helm-principle .helm-maxim { color: var(--accent); }
.motion-continuity { margin-top: var(--space-6); max-width: 48rem; }
@media (max-width: 768px) {
    .workshop-voice-lines, .helm-principle { grid-template-columns: 1fr; gap: var(--space-4); }
}

/* ============ FREQUENCY GAP: definition + five rhythms ============ */
.freq-label { text-transform: uppercase; font-size: 0.875rem; letter-spacing: 0.12em; }
.freq-label b { text-transform: none; letter-spacing: -0.01em; color: var(--accent); }
.freq-def { margin: 0 0 var(--space-10); padding: var(--space-6) 0 var(--space-6) var(--space-8); border-left: 3px solid var(--accent); }
.freq-def-k, .rhythm-k { display: block; font-size: 0.875rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--accent); font-weight: 700; margin-bottom: var(--space-3); }
.freq-def p { font-family: var(--font-heading); font-size: clamp(1.5rem, 3vw, 2.35rem); line-height: 1.22; letter-spacing: -0.025em; max-width: 52rem; }
.freq-def strong { color: var(--accent); }
.freq-clarify { margin-top: var(--space-10); font-size: 1.125rem; line-height: 1.7; color: var(--text-secondary); max-width: 46rem; }
.freq-close { margin-top: var(--space-10); font-family: var(--font-heading); font-size: 1.25rem; line-height: 1.45; max-width: 44rem; }
.rhythms { position: relative; margin-top: var(--space-12); padding-top: var(--space-12); }
.rhythms::before { content: ''; position: absolute; top: 0; left: 6px; width: 1px; height: var(--space-10); background: linear-gradient(var(--accent), transparent); }
.rhythms-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-10); align-items: end; margin-bottom: var(--space-8); }
.rhythms-title { font-family: var(--font-heading); font-size: clamp(1.9rem, 3.6vw, 2.8rem); letter-spacing: -0.03em; line-height: 1.08; }
.rhythms-head p { font-size: 1.0625rem; line-height: 1.7; color: var(--text-secondary); }
.rhythms-list { list-style: none; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: var(--space-3); }
.rhythms-list li { position: relative; padding: var(--space-6) var(--space-5); border: 1px solid var(--accent-border); border-radius: var(--radius-md); background: linear-gradient(180deg, rgba(200,255,0,0.05), transparent 70%); overflow: hidden; }
.rhythms-list li::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: var(--accent); }
.rhythms-list p { font-size: 1rem; line-height: 1.55; color: var(--text-primary); }
.rhythms-close { margin-top: var(--space-8); font-family: var(--font-heading); font-size: 1.25rem; line-height: 1.45; max-width: 44rem; }
@media (max-width: 1024px) { .rhythms-list { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 768px) {
    .rhythms-head { grid-template-columns: 1fr; gap: var(--space-4); }
    .rhythms-list { grid-template-columns: 1fr; }
    .freq-def { padding-left: var(--space-5); }
}