*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --black: #050504;
    --black-soft: #0d0b0a;
    --paper: #f3eadc;
    --paper-dim: #cbbdab;
    --ash: #8c8175;
    --ember: #d34b2f;
    --ember-deep: #8f2b1f;
    --line: rgba(243, 234, 220, 0.18);
    --line-strong: rgba(211, 75, 47, 0.58);
    --radius: 0;
    --serif: "Playfair Display", Georgia, serif;
    --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --mono: "DM Mono", "Courier New", monospace;
}

html { scroll-behavior: smooth; background: var(--black); max-width: 100%; overflow-x: hidden; }

body {
    min-height: 100vh;
    background: linear-gradient(rgba(243, 234, 220, 0.025) 1px, transparent 1px), var(--black);
    background-size: 100% 18px;
    color: var(--paper);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
    max-width: 100%;
    overflow-x: hidden;
}

a { color: var(--paper); text-decoration: underline; text-decoration-color: rgba(211, 75, 47, 0.64); text-underline-offset: 0.22em; }
a:hover { color: var(--ember); }
h1, h2, h3, h4 { color: var(--paper); font-family: var(--serif); line-height: 1.04; font-weight: 700; }
p { color: var(--paper-dim); }

.eyebrow, .section-label, .nav-links a, .stat-label, .project-meta, .microcopy, .cover-kicker, .cover-footer {
    font-family: var(--mono);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.container { width: min(1060px, calc(100% - 44px)); margin: 0 auto; }

nav {
    position: sticky; top: 0; z-index: 50;
    background: rgba(5, 5, 4, 0.94);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(12px);
}

.nav-inner {
    width: min(1060px, calc(100% - 44px));
    min-height: 64px; margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between; gap: 24px;
}

.logo {
    display: inline-flex; align-items: center; justify-content: center;
    width: 44px; height: 44px;
    border: 1px solid var(--line-strong);
    color: var(--paper); font-family: var(--mono);
    font-size: 0.78rem; letter-spacing: 0.08em; text-decoration: none;
}
.logo:hover { color: var(--ember); }

.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-links a {
    min-height: 34px; display: inline-flex; align-items: center;
    padding: 8px 10px; font-size: 0.72rem; color: var(--ash);
    text-decoration: none; transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--ember); }

.hero { padding: 100px 0 80px; }
.hero h1 { font-size: clamp(40px, 6vw, 72px); margin-bottom: 20px; }
.hero .tagline { font-size: 18px; max-width: 540px; margin-bottom: 32px; }
.hero .eyebrow { color: var(--ash); font-size: 0.72rem; margin-bottom: 16px; }
.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 56px;
    align-items: center;
}

.signal-panel {
    border: 1px solid var(--line);
    padding: 28px;
    background: rgba(243, 234, 220, 0.025);
}

.signal-row {
    display: grid;
    grid-template-columns: 42px 1fr;
    gap: 14px;
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
}

.signal-row span {
    color: var(--ember);
    font-family: var(--mono);
    font-size: 0.72rem;
}

.signal-row strong {
    color: var(--paper);
    font-size: 15px;
    font-weight: 600;
}

.microcopy {
    color: var(--ash);
    font-size: 0.68rem;
    line-height: 1.7;
    margin-top: 18px;
}

.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 12px 24px; font-family: var(--mono);
    font-size: 0.78rem; letter-spacing: 0.06em;
    text-transform: uppercase; text-decoration: none;
    transition: all 0.2s; cursor: pointer; border: none;
}
.btn-primary {
    background: var(--ember); color: var(--paper);
}
.btn-primary:hover { background: var(--ember-deep); color: var(--paper); }
.btn-secondary {
    background: transparent; color: var(--paper);
    border: 1px solid var(--line);
}
.btn-secondary:hover { border-color: var(--ember); color: var(--ember); }
.btn-group { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }

.section-divider {
    border: none; border-top: 1px solid var(--line);
    margin: 0;
}

.grid { display: grid; gap: 24px; margin-top: 40px; }
.grid.three-col { grid-template-columns: repeat(3, 1fr); }
.grid.two-col { grid-template-columns: repeat(2, 1fr); }
.project-grid { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 720px) {
    .grid.three-col, .grid.two-col, .project-grid { grid-template-columns: 1fr; }
}

.card {
    padding: 28px; border: 1px solid var(--line);
    transition: border-color 0.2s;
}
.card:hover { border-color: var(--line-strong); }
.card h3 { font-size: 20px; margin-bottom: 12px; }
.card p { font-size: 15px; }
.card .link-arrow {
    display: inline-block; margin-top: 16px;
    font-family: var(--mono); font-size: 0.72rem;
    letter-spacing: 0.06em; text-transform: uppercase;
}

.link-arrow::after { content: " →"; }

.project-card {
    min-height: 290px;
    display: flex;
    flex-direction: column;
}

.project-card .link-arrow { margin-top: auto; }

.project-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
    color: var(--ash);
    font-size: 0.66rem;
}

.project-meta span {
    border: 1px solid var(--line);
    padding: 4px 8px;
}

.stat-card {
    padding: 28px; border: 1px solid var(--line); text-align: center;
}
.stat-number {
    display: block; font-family: var(--serif);
    font-size: 48px; font-weight: 700; color: var(--paper);
    line-height: 1.1;
}
.stat-label {
    display: block; margin-top: 8px;
    font-size: 0.72rem; color: var(--ash);
}

.book-cta { padding: 60px 0; }
.book-cta-card {
    padding: 40px; border: 1px solid var(--line-strong);
    display: flex; justify-content: space-between; align-items: center; gap: 40px;
}
.book-cta-card h2 { font-size: 28px; margin-bottom: 12px; }
.book-cta-card p { font-size: 15px; max-width: 480px; }
.book-cta-actions { display: flex; gap: 12px; flex-shrink: 0; flex-direction: column; }

@media (max-width: 720px) {
    .book-cta-card { flex-direction: column; align-items: flex-start; }
    .book-cta-actions { flex-direction: row; flex-wrap: wrap; }
}

section { padding: 60px 0; }
section .section-head h2 { font-size: 28px; margin-bottom: 16px; }
section .section-head p { max-width: 680px; }

.content-narrow {
    max-width: 680px;
    margin-top: 18px;
}

.content-narrow p + p { margin-top: 16px; }
.content-narrow strong { color: var(--paper); }

.price-tag {
    font-family: var(--serif); font-size: 48px; font-weight: 700;
    color: var(--paper); line-height: 1.1;
}
.price-note {
    font-family: var(--mono); font-size: 0.72rem;
    color: var(--ash); letter-spacing: 0.06em;
}

.price-block { margin: 24px 0; }

.book-cover {
    width: 100%;
    min-height: 430px;
    border: 1px solid var(--line-strong);
    padding: 30px;
    background:
        linear-gradient(135deg, rgba(211, 75, 47, 0.2), transparent 38%),
        linear-gradient(rgba(243, 234, 220, 0.035) 1px, transparent 1px),
        var(--black-soft);
    background-size: auto, 100% 18px, auto;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: 18px 18px 0 rgba(211, 75, 47, 0.1);
}

.cover-kicker, .cover-footer {
    color: var(--ash);
    font-size: 0.68rem;
}

.cover-title {
    font-family: var(--serif);
    font-size: 45px;
    line-height: 0.98;
    max-width: 240px;
}

.cover-subtitle {
    color: var(--paper-dim);
    max-width: 240px;
    line-height: 1.5;
}

.cover-mark {
    align-self: flex-end;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 62px;
    height: 62px;
    border: 1px solid var(--line-strong);
    color: var(--ember);
    font-family: var(--mono);
}

.strike {
    color: var(--ash);
    text-decoration: line-through;
}

.value-card {
    text-align: center;
    margin-top: 40px;
    padding: 28px;
    border: 1px solid var(--line-strong);
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    margin-top: 36px;
}

.status-card {
    min-height: 220px;
    border: 1px solid var(--line);
    padding: 24px;
    background: rgba(243, 234, 220, 0.025);
}

.status-card span,
.process-step > span,
.timeline-row > span {
    display: block;
    color: var(--ember);
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.status-card strong {
    display: block;
    color: var(--paper);
    font-family: var(--serif);
    font-size: 22px;
    line-height: 1.08;
    margin: 18px 0 12px;
}

.status-card p,
.process-step p,
.timeline-row p,
.boundary-list p,
.faq-item p {
    font-size: 15px;
}

.process-list,
.timeline-list,
.boundary-list,
.faq-list {
    max-width: 860px;
    margin-top: 36px;
}

.process-step,
.timeline-row {
    display: grid;
    grid-template-columns: 74px minmax(0, 1fr);
    gap: 24px;
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
}

.process-step:first-child,
.timeline-row:first-child {
    border-top: 1px solid var(--line);
}

.process-step h3,
.timeline-row h3,
.faq-item h3 {
    font-family: var(--sans);
    font-size: 17px;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 6px;
}

.boundary-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.boundary-list > div {
    border: 1px solid var(--line);
    padding: 24px;
    background: rgba(243, 234, 220, 0.02);
}

.boundary-list strong {
    display: block;
    color: var(--paper);
    margin-bottom: 8px;
}

.faq-item {
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
}

.faq-item:first-child {
    border-top: 1px solid var(--line);
}

.chapter-preview .section-head p:not(.section-label) {
    color: var(--ash);
}

.chapter-flip-grid { align-items: stretch; }

.flip-card {
    min-height: 270px;
    perspective: 1200px;
    cursor: pointer;
    outline: none;
}

.flip-card-inner {
    position: relative;
    min-height: 100%;
    transform-style: preserve-3d;
    transition: transform 0.55s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.flip-card.is-flipped .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-face {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line);
    padding: 28px;
    background:
        linear-gradient(rgba(243, 234, 220, 0.018) 1px, transparent 1px),
        var(--black);
    background-size: 100% 18px;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transition: border-color 0.2s, background-color 0.2s;
}

.flip-face h3 {
    font-size: 22px;
    margin: 12px 0;
}

.flip-face p:not(.section-label) {
    font-size: 15px;
}

.flip-card:hover .flip-front,
.flip-card:focus-visible .flip-front,
.flip-card.is-flipped .flip-back {
    border-color: var(--line-strong);
}

.flip-back {
    transform: rotateY(180deg);
    border-color: var(--line-strong);
    background:
        linear-gradient(135deg, rgba(211, 75, 47, 0.12), transparent 42%),
        linear-gradient(rgba(243, 234, 220, 0.022) 1px, transparent 1px),
        var(--black-soft);
    background-size: auto, 100% 18px, auto;
}

.flip-hint {
    margin-top: auto;
    padding-top: 18px;
    color: var(--ember);
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.disclosure-card, .contact-strip {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1fr);
    gap: 42px;
    align-items: center;
    border: 1px solid var(--line);
    padding: 34px;
    background: rgba(243, 234, 220, 0.025);
}

.disclosure-card h2, .contact-strip h2 {
    font-size: 28px;
    margin-top: 8px;
}

.contact-strip {
    grid-template-columns: minmax(0, 1fr) auto;
    border-color: var(--line-strong);
}

.contact-strip p { max-width: 640px; }

footer {
    padding: 40px 0; border-top: 1px solid var(--line);
    font-family: var(--mono); font-size: 0.72rem; color: var(--ash);
}
footer a { color: var(--ash); }
footer a:hover { color: var(--ember); }
.footer-grid {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

@media (max-width: 860px) {
    .hero-grid, .disclosure-card, .contact-strip {
        grid-template-columns: 1fr;
    }

    .status-grid,
    .boundary-list {
        grid-template-columns: repeat(2, 1fr);
    }

    .book-cover {
        max-width: 360px;
        min-height: 390px;
    }
}

@media (max-width: 720px) {
    .hero { padding: 84px 0 64px; }
    .hero h1 { font-size: clamp(38px, 13vw, 54px); }
    .hero .tagline { font-size: 17px; }
    .book-cta-card { flex-direction: column; align-items: flex-start; }
    .book-cta-actions { flex-direction: row; flex-wrap: wrap; }
    .disclosure-card, .contact-strip, .book-cta-card { padding: 28px; }
    .status-grid,
    .boundary-list {
        grid-template-columns: 1fr;
    }
    .process-step,
    .timeline-row {
        grid-template-columns: 1fr;
        gap: 10px;
    }
}

@media (max-width: 560px) {
    .container, .nav-inner { width: min(100% - 32px, 1060px); }
    .nav-inner { gap: 12px; }
    .nav-links { gap: 2px; }
    .nav-links a { padding: 8px 6px; font-size: 0.66rem; }
    .nav-links .nav-optional { display: none; }
    .logo { width: 40px; height: 40px; flex: 0 0 40px; }
    .btn { width: 100%; justify-content: center; }
    .book-cta-actions, .btn-group { width: 100%; }
    .book-cover { min-height: 360px; box-shadow: 10px 10px 0 rgba(211, 75, 47, 0.1); }
    .cover-title { font-size: 38px; }
}

@media (max-width: 340px) {
    .nav-links a { font-size: 0.62rem; padding-inline: 4px; }
    .nav-links a[href="#projects"], .nav-links a[href="/#projects"] { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .flip-card-inner, .btn, .card, .nav-links a {
        transition: none;
    }
}