.ff-page {
    --ff-bg: var(--bg, #1b1a18);
    --ff-surface: var(--bg-secondary, #23231f);
    --ff-surface-strong: #2b2c26;
    --ff-border: var(--border, #373630);
    --ff-text: var(--text, #eeeae3);
    --ff-muted: var(--text-secondary, #aaa69d);
    --ff-dim: var(--text-tertiary, #969289);
    --ff-green: var(--accent, #c5cbb1);
    --ff-green-dark: #8c9479;
    --ff-amber: #c4b38b;
    --ff-red: #c4877d;
    background: var(--ff-bg);
    color: var(--ff-text);
}
.ff-page .site-header { background: var(--ff-bg); }
.ff-page .site-footer { background: var(--ff-bg); }
.ff-shell { width: min(1040px, calc(100% - 80px)); margin: 0 auto; padding: 28px 0 52px; }
.ff-breadcrumb { display: flex; gap: 9px; color: var(--ff-muted); font: 11px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; margin-bottom: 24px; }
.ff-breadcrumb a { color: var(--ff-muted); text-decoration: none; }
.ff-breadcrumb a:hover { color: var(--ff-text); }
.ff-eyebrow { color: var(--ff-green); font: 600 0.72rem/1.3 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0.12em; margin: 0 0 15px; }
.ff-intro { display: flex; align-items: end; justify-content: space-between; gap: 35px; margin-bottom: 30px; }
.ff-intro h1 { font-size: clamp(2.5rem, 6vw, 5.8rem); font-weight: 600; letter-spacing: -0.065em; line-height: 0.98; margin: 0; max-width: 850px; }
.ff-intro h1 em { color: var(--ff-green); font-style: normal; }
.ff-lede { color: var(--ff-muted); font-size: 1.08rem; line-height: 1.65; max-width: 690px; margin: 27px 0 0; }
.ff-snapshot { color: var(--ff-dim); font: 0.72rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .06em; margin: 13px 0 0; text-transform: uppercase; }
.ff-mode { border: 1px solid var(--ff-border); background: var(--ff-surface); color: var(--ff-green); display: grid; grid-template-columns: auto 1fr; gap: 3px 9px; align-items: center; padding: 13px 15px; min-width: 220px; max-width: 280px; font: 600 0.72rem/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0.08em; }
.ff-mode-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ff-amber); box-shadow: 0 0 0 3px rgba(196,179,139,.14); }
.ff-mode small { grid-column: 2; color: var(--ff-dim); font: 400 0.72rem/1.35 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; letter-spacing: 0; }
.ff-mode a { color: var(--ff-text); text-decoration: underline; text-underline-offset: 2px; }
.ff-lede a { color: var(--ff-text); text-decoration: underline; text-underline-offset: 3px; }
.ff-alert { display: flex; align-items: flex-start; gap: 15px; border: 1px solid rgba(196,179,139,.36); background: rgba(196,179,139,.08); padding: 16px 18px; margin-bottom: 18px; }
.ff-alert-mark { display: grid; place-items: center; flex: 0 0 22px; width: 22px; height: 22px; border: 1px solid var(--ff-amber); color: var(--ff-amber); font: 700 0.8rem/1 ui-monospace, monospace; }
.ff-alert p { color: #d2c7ae; font-size: 0.9rem; line-height: 1.55; margin: 0; }
.ff-alert strong { color: var(--ff-amber); }
.ff-goal-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 1px; border: 1px solid var(--ff-border); background: var(--ff-border); margin-bottom: 28px; }
.ff-goal-card { background: var(--ff-surface); min-height: 134px; padding: 20px; display: flex; flex-direction: column; justify-content: space-between; }
.ff-goal-card span, .ff-goal-card small { color: var(--ff-muted); font-size: 0.8rem; }
.ff-goal-card strong { color: var(--ff-text); font: 600 clamp(1.35rem, 2.6vw, 2rem)/1 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: -0.06em; }
.ff-goal-card small { color: var(--ff-dim); }
.ff-goal-primary { background: var(--ff-green); color: var(--ff-bg); }
.ff-goal-primary span, .ff-goal-primary small, .ff-goal-primary strong { color: var(--ff-bg); }
.ff-panel { border: 1px solid var(--ff-border); background: var(--ff-surface); padding: clamp(22px, 4vw, 40px); }
.ff-calculator { margin-bottom: 28px; }
.ff-section-heading { display: flex; justify-content: space-between; align-items: flex-start; gap: 30px; margin-bottom: 28px; }
.ff-section-heading h2, .ff-section h2, .ff-next h2 { color: var(--ff-text); font-size: clamp(1.45rem, 2.8vw, 2.2rem); letter-spacing: -0.05em; line-height: 1.05; margin: 0; }
.ff-section-heading > p { color: var(--ff-muted); font-size: 0.9rem; line-height: 1.55; max-width: 390px; margin: 0; }
.ff-input-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 20px; }
.ff-input-grid label { color: var(--ff-muted); display: grid; gap: 8px; font-size: 0.8rem; }
.ff-input-grid input { width: 100%; border: 1px solid var(--ff-border); background: var(--ff-bg); color: var(--ff-text); font: 500 1rem ui-monospace, SFMono-Regular, Menlo, monospace; padding: 12px; border-radius: 0; }
.ff-input-grid input:focus { outline: 2px solid var(--ff-green); outline-offset: 1px; }
.ff-math-output { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--ff-border); border-bottom: 1px solid var(--ff-border); margin-bottom: 25px; }
.ff-math-output div { padding: 18px 15px; border-right: 1px solid var(--ff-border); }
.ff-math-output div:last-child { border-right: 0; }
.ff-math-output span { display: block; color: var(--ff-muted); font-size: 0.75rem; margin-bottom: 8px; }
.ff-math-output strong { color: var(--ff-green); font: 600 clamp(1.25rem, 3vw, 2rem) ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: -0.06em; }
.ff-progress-label { display: flex; justify-content: space-between; color: var(--ff-muted); font: 0.75rem ui-monospace, SFMono-Regular, Menlo, monospace; margin-bottom: 8px; }
.ff-progress { height: 8px; background: var(--ff-bg); overflow: hidden; }
.ff-progress span { display: block; height: 100%; width: 0%; min-width: 3px; background: var(--ff-green); transition: width .2s ease; }
.ff-calculator-note { color: var(--ff-dim); font-size: 0.8rem; line-height: 1.5; margin: 18px 0 24px; }
.ff-milestones { display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; }
.ff-milestone { border-left: 2px solid var(--ff-green-dark); background: var(--ff-surface-strong); padding: 12px 10px; min-height: 82px; }
.ff-milestone span { color: var(--ff-muted); display: block; font: 0.7rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.ff-milestone strong { color: var(--ff-text); display: block; font: 600 1.03rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: -0.05em; margin-top: 10px; }
.ff-two-column { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-bottom: 80px; }
.ff-number-list, .ff-gates { list-style: none; padding: 0; margin: 28px 0 0; }
.ff-number-list li { display: grid; grid-template-columns: 1fr; gap: 4px; border-top: 1px solid var(--ff-border); padding: 17px 0; }
.ff-number-list strong, .ff-gates strong { color: var(--ff-text); font-size: 0.95rem; }
.ff-number-list span, .ff-gates small { color: var(--ff-muted); font-size: 0.85rem; line-height: 1.5; }
.ff-gates li { display: flex; align-items: flex-start; gap: 12px; border-top: 1px solid var(--ff-border); padding: 16px 0; }
.ff-gates li > div { display: grid; gap: 4px; }
.ff-status { flex: 0 0 8px; width: 8px; height: 8px; margin-top: 5px; border-radius: 50%; }
.ff-status-amber { background: var(--ff-amber); box-shadow: 0 0 0 4px rgba(196,179,139,.13); }
.ff-research-summary { margin-bottom: 80px; }
.ff-finding-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--ff-border); border: 1px solid var(--ff-border); }
.ff-finding-card { background: var(--ff-surface-strong); min-height: 230px; padding: 22px; }
.ff-finding-grade { color: var(--ff-green); font: 0.67rem/1.3 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .07em; }
.ff-finding-card h3 { color: var(--ff-text); font-size: 1.16rem; letter-spacing: -0.035em; line-height: 1.15; margin: 36px 0 12px; }
.ff-finding-card p { color: var(--ff-muted); font-size: 0.9rem; line-height: 1.55; margin: 0; }
.ff-finding-card a, .ff-source-note a { color: var(--ff-text); text-decoration: underline; text-underline-offset: 3px; }
.ff-architecture { margin-bottom: 80px; }
.ff-flow { display: flex; align-items: stretch; gap: 8px; margin-bottom: 28px; }
.ff-flow-step { flex: 1; background: var(--ff-surface-strong); border-top: 2px solid var(--ff-green-dark); padding: 17px; min-height: 150px; }
.ff-flow-step span { color: var(--ff-green); font: 0.7rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.ff-flow-step strong { display: block; color: var(--ff-text); font-size: 0.98rem; margin: 28px 0 8px; }
.ff-flow-step small { color: var(--ff-muted); display: block; font-size: 0.78rem; line-height: 1.45; }
.ff-flow-arrow { color: var(--ff-green-dark); display: grid; place-items: center; font-size: 1.2rem; }
.ff-evaluation-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--ff-border); border: 1px solid var(--ff-border); }
.ff-evaluation { background: var(--ff-surface); padding: 24px; }
.ff-evaluation h3 { color: var(--ff-text); font-size: 1rem; margin: 0 0 18px; }
.ff-evaluation ul { list-style: none; padding: 0; margin: 0; }
.ff-evaluation li { color: var(--ff-muted); border-top: 1px solid var(--ff-border); font-size: 0.85rem; line-height: 1.45; padding: 10px 0 10px 17px; position: relative; }
.ff-evaluation li::before { color: var(--ff-green); content: "✓"; left: 0; position: absolute; }
.ff-sources { margin-bottom: 80px; }
.ff-source-list { display: grid; grid-template-columns: 1fr 1fr; column-gap: 28px; list-style: none; margin: 0; padding: 0; }
.ff-source-list li { align-items: flex-start; border-top: 1px solid var(--ff-border); display: grid; grid-template-columns: 32px 1fr; gap: 10px; padding: 15px 0; }
.ff-source-list li > span { color: var(--ff-green); font: 0.7rem ui-monospace, SFMono-Regular, Menlo, monospace; padding-top: 2px; }
.ff-source-list li > div { display: grid; gap: 5px; }
.ff-source-list a { color: var(--ff-text); font-size: 0.88rem; line-height: 1.35; text-decoration: underline; text-underline-offset: 3px; }
.ff-source-list small { color: var(--ff-muted); font-size: 0.77rem; line-height: 1.4; }
.ff-source-note { border-top: 1px solid var(--ff-border); color: var(--ff-muted); font-size: 0.83rem; line-height: 1.5; margin: 20px 0 0; padding-top: 18px; }
.ff-section { margin-bottom: 80px; }
.ff-section-heading-wide { align-items: end; }
.ff-strategy-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--ff-border); border: 1px solid var(--ff-border); }
.ff-strategy-card { background: var(--ff-surface); padding: 22px; min-height: 315px; }
.ff-card-top { display: flex; justify-content: space-between; color: var(--ff-dim); font: 0.72rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.ff-tag { color: var(--ff-green); border: 1px solid rgba(197,203,177,.35); padding: 3px 6px; font-size: 0.64rem; }
.ff-strategy-card h3 { font-size: 1.28rem; letter-spacing: -0.04em; margin: 42px 0 10px; }
.ff-strategy-card > p { color: var(--ff-muted); font-size: 0.86rem; line-height: 1.5; min-height: 60px; margin: 0 0 20px; }
.ff-strategy-card dl { border-top: 1px solid var(--ff-border); margin: 0; padding-top: 14px; }
.ff-strategy-card dt { color: var(--ff-dim); font: 0.67rem ui-monospace, SFMono-Regular, Menlo, monospace; text-transform: uppercase; letter-spacing: .06em; }
.ff-strategy-card dd { color: var(--ff-text); font-size: 0.82rem; line-height: 1.4; margin: 4px 0 12px; }
.ff-protocol { margin-bottom: 80px; }
.ff-ladder { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: var(--ff-border); border: 1px solid var(--ff-border); }
.ff-ladder-step { background: var(--ff-surface-strong); padding: 18px; min-height: 180px; }
.ff-ladder-step span { color: var(--ff-green); font: 0.72rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.ff-ladder-step strong { display: block; font-size: 1.05rem; margin: 32px 0 8px; }
.ff-ladder-step p { color: var(--ff-muted); font-size: 0.78rem; line-height: 1.5; margin: 0; }
.ff-evidence-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.ff-evidence-grid a { display: flex; flex-direction: column; min-height: 215px; border-top: 2px solid var(--ff-green-dark); background: var(--ff-surface); padding: 18px; text-decoration: none; transition: transform .18s ease, background .18s ease; }
.ff-evidence-grid a:hover { background: var(--ff-surface-strong); transform: translateY(-3px); }
.ff-evidence-grid span { color: var(--ff-green); font: 0.7rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.ff-evidence-grid strong { color: var(--ff-text); font-size: 0.92rem; line-height: 1.45; margin-top: 25px; }
.ff-evidence-grid small { color: var(--ff-muted); font-size: 0.78rem; margin-top: auto; }
.ff-next { display: flex; justify-content: space-between; align-items: end; gap: 40px; border-top: 1px solid var(--ff-border); padding-top: 30px; }
.ff-next > div:first-child { max-width: 620px; }
.ff-next h2 { color: var(--ff-green); }
.ff-next p:not(.ff-eyebrow) { color: var(--ff-muted); font-size: 0.95rem; line-height: 1.6; margin: 18px 0 0; }
.ff-next-list { display: grid; gap: 10px; min-width: 240px; }
.ff-next-list span { color: var(--ff-dim); font: 0.75rem ui-monospace, SFMono-Regular, Menlo, monospace; }
.ff-next-list strong { color: var(--ff-text); font-weight: 500; margin-left: 12px; }

@media (max-width: 900px) {
    .ff-goal-grid { grid-template-columns: repeat(2, 1fr); }
    .ff-finding-grid { grid-template-columns: repeat(2, 1fr); }
    .ff-strategy-grid { grid-template-columns: repeat(2, 1fr); }
    .ff-ladder { grid-template-columns: repeat(3, 1fr); }
    .ff-ladder-step:last-child { grid-column: span 3; min-height: auto; }
    .ff-evidence-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 700px) {
    .ff-shell { padding: 35px 18px 65px; }
    .ff-breadcrumb { margin-bottom: 35px; }
    .ff-intro { display: block; }
    .ff-intro h1 { font-size: clamp(2.55rem, 13vw, 4.8rem); }
    .ff-mode { margin-top: 24px; width: fit-content; }
    .ff-input-grid, .ff-math-output { grid-template-columns: repeat(2, 1fr); }
    .ff-math-output div:nth-child(2) { border-right: 0; }
    .ff-math-output div:nth-child(-n+2) { border-bottom: 1px solid var(--ff-border); }
    .ff-milestones { grid-template-columns: repeat(3, 1fr); }
    .ff-two-column { grid-template-columns: 1fr; gap: 18px; margin-bottom: 60px; }
    .ff-research-summary, .ff-architecture, .ff-sources { margin-bottom: 60px; }
    .ff-section { margin-bottom: 60px; }
    .ff-section-heading, .ff-next { display: block; }
    .ff-section-heading > p { margin-top: 17px; }
    .ff-strategy-grid { grid-template-columns: 1fr; }
    .ff-strategy-card { min-height: auto; }
    .ff-strategy-card > p { min-height: auto; }
    .ff-finding-grid, .ff-evaluation-grid, .ff-source-list { grid-template-columns: 1fr; }
    .ff-finding-card { min-height: auto; }
    .ff-finding-card h3 { margin-top: 28px; }
    .ff-flow { align-items: stretch; flex-direction: column; }
    .ff-flow-step { min-height: auto; }
    .ff-flow-step strong { margin-top: 15px; }
    .ff-flow-arrow { transform: rotate(90deg); min-height: 20px; }
    .ff-ladder { grid-template-columns: 1fr 1fr; }
    .ff-ladder-step:last-child { grid-column: span 2; }
    .ff-evidence-grid { grid-template-columns: 1fr; }
    .ff-evidence-grid a { min-height: 180px; }
    .ff-next-list { margin-top: 28px; }
}

@media (max-width: 430px) {
    .ff-goal-grid { grid-template-columns: 1fr; }
    .ff-goal-card { min-height: 110px; }
    .ff-input-grid, .ff-math-output { grid-template-columns: 1fr; }
    .ff-math-output div, .ff-math-output div:nth-child(2) { border-right: 0; border-bottom: 1px solid var(--ff-border); }
    .ff-math-output div:last-child { border-bottom: 0; }
    .ff-milestones { grid-template-columns: repeat(2, 1fr); }
    .ff-ladder { grid-template-columns: 1fr; }
    .ff-ladder-step:last-child { grid-column: auto; }
}

/* Compact research dashboard: keep the evidence, reduce the scroll. */
.ff-shell { max-width: 1280px; padding: 28px 24px 52px; }
.ff-breadcrumb { margin-bottom: 24px; }
.ff-intro { gap: 24px; margin-bottom: 18px; }
.ff-intro h1 { font-size: clamp(2.35rem, 4.8vw, 4.65rem); }
.ff-lede { font-size: 0.98rem; line-height: 1.45; margin-top: 16px; }
.ff-snapshot { margin-top: 8px; }
.ff-alert { padding: 10px 14px; margin-bottom: 10px; }
.ff-alert p { font-size: 0.82rem; line-height: 1.4; }
.ff-goal-grid { margin-bottom: 14px; }
.ff-goal-card { min-height: 96px; padding: 14px 16px; }
.ff-goal-card strong { font-size: clamp(1.2rem, 2.2vw, 1.75rem); }
.ff-panel { padding: 20px 22px; }
.ff-calculator { margin-bottom: 14px; }
.ff-section-heading { gap: 20px; margin-bottom: 16px; }
.ff-section-heading > p { font-size: 0.86rem; line-height: 1.45; }
.ff-input-grid { gap: 8px; margin-bottom: 12px; }
.ff-input-grid input { padding: 9px 10px; }
.ff-math-output { margin-bottom: 14px; }
.ff-math-output div { padding: 11px 12px; }
.ff-math-output strong { font-size: 1.3rem; }
.ff-calculator-note { margin: 10px 0 13px; }
.ff-milestone { min-height: 60px; padding: 8px; }
.ff-milestone strong { margin-top: 5px; }
.ff-two-column { gap: 14px; margin-bottom: 34px; }
.ff-number-list, .ff-gates { margin-top: 16px; }
.ff-number-list li, .ff-gates li { padding: 9px 0; }
.ff-research-summary, .ff-architecture, .ff-sources, .ff-section, .ff-protocol { margin-bottom: 34px; }
.ff-finding-card { min-height: 150px; padding: 15px; }
.ff-finding-card h3 { margin: 20px 0 8px; }
.ff-finding-card p { font-size: 0.84rem; line-height: 1.45; }
.ff-flow { gap: 4px; margin-bottom: 14px; }
.ff-flow-step { min-height: 94px; padding: 12px; }
.ff-flow-step strong { margin: 15px 0 5px; }
.ff-evaluation { padding: 14px; }
.ff-evaluation li { padding: 6px 0 6px 14px; }
.ff-strategy-card { min-height: 225px; padding: 15px; }
.ff-strategy-card h3 { margin: 22px 0 7px; }
.ff-strategy-card > p { min-height: 44px; line-height: 1.4; margin-bottom: 12px; }
.ff-strategy-card dd { margin: 3px 0 7px; }
.ff-ladder-step { min-height: 130px; padding: 12px; }
.ff-ladder-step strong { margin: 18px 0 5px; }
.ff-evidence-grid { gap: 8px; }
.ff-evidence-grid a { min-height: 135px; padding: 13px; }
.ff-evidence-grid strong { margin-top: 12px; }
.ff-source-list li { padding: 9px 0; }
.ff-source-note { margin-top: 12px; padding-top: 12px; }
.ff-next { padding-top: 18px; }
.ff-next p:not(.ff-eyebrow) { margin-top: 10px; }
.ff-next-list { gap: 6px; }

.ff-collapsible > summary { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; cursor: pointer; list-style: none; }
.ff-collapsible > summary::-webkit-details-marker { display: none; }
.ff-collapsible > summary::marker { display: none; }
.ff-collapsible > summary .ff-section-heading { flex: 1; margin: 0; }
.ff-collapsible > summary .ff-section-heading > p { max-width: 520px; }
.ff-disclosure { flex: 0 0 auto; color: var(--ff-green); font: 0.74rem ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: 0.04em; white-space: nowrap; }
.ff-disclosure span { display: inline-block; margin-left: 5px; font-size: 1rem; transition: transform 0.18s ease; }
.ff-collapsible[open] .ff-disclosure span { transform: rotate(45deg); }
.ff-collapsible-body { border-top: 1px solid var(--ff-border); margin-top: 16px; padding-top: 16px; }

@media (max-width: 700px) {
    .ff-shell { width: calc(100% - 40px); padding: 24px 0 42px; }
    .ff-breadcrumb { margin-bottom: 22px; }
    .ff-mode { margin-top: 16px; }
    .ff-goal-card { min-height: 82px; }
    .ff-panel { padding: 17px 15px; }
    .ff-two-column { gap: 12px; margin-bottom: 30px; }
    .ff-research-summary, .ff-architecture, .ff-sources, .ff-section, .ff-protocol { margin-bottom: 30px; }
    .ff-collapsible > summary { gap: 10px; }
    .ff-collapsible > summary .ff-section-heading { display: block; }
    .ff-collapsible > summary .ff-section-heading > p { margin-top: 10px; }
    .ff-disclosure { font-size: 0.68rem; }
}

@media (max-width: 430px) {
    .ff-goal-card { min-height: 86px; }
    .ff-collapsible > summary { display: block; }
    .ff-disclosure { display: block; margin-top: 12px; }
}