:root {
    --ink: #18406b;
    --ink-2: #0d2a4d;
    --ink-3: #061a33;
    --paper: #fbf6ec;
    --paper-2: #f1e9d6;
    --paper-3: #e6dcc2;
    --rule: #d6c89e;
    --accent: #f47c2c;
    --accent-2: #c45816;
    --accent-3: #4794d6;
    --muted: #5a6878;
    --body: #1a2330;
    --link: #18406b;
}
* { box-sizing: border-box; }
html, body {
    margin: 0; padding: 0;
    background: var(--paper);
    color: var(--body);
    font-family: 'Lora', Georgia, 'Times New Roman', serif;
    font-size: 19px;
    line-height: 1.62;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    max-width: 100vw;
}
img, svg, video, iframe { max-width: 100%; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--link); text-decoration: none; border-bottom: 1px solid rgba(24,64,107,0.25); }
a:hover { color: var(--accent-2); border-bottom-color: var(--accent); }

h1, h2, h3, h4 {
    font-family: 'Bebas Neue', 'Helvetica Neue', sans-serif;
    font-weight: 400;
    line-height: 1.05;
    letter-spacing: 0.005em;
    color: var(--ink);
    margin: 0 0 0.5em;
}
h1 { font-size: clamp(2.4rem, 6vw, 3.8rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-top: 1.4em; }
h3 { font-size: 1.3rem; }
p { margin: 0 0 1em; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 28px; }

/* ---- top bar ---- */
header.top {
    border-bottom: 2px solid var(--ink);
    background: var(--paper);
    position: sticky; top: 0; z-index: 50;
}
.top-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px 16px;
    padding: 14px 0;
}
.brand {
    display: inline-flex;
    align-items: center;
    border: none;
    line-height: 0;
}
.brand img {
    height: clamp(58px, 7.5vw, 90px);
    width: auto;
    max-width: 100%;
    display: block;
}
nav.main { min-width: 0; }
nav.main ul {
    list-style: none; margin: 0; padding: 0;
    display: flex;
    gap: clamp(8px, 2.4vw, 26px);
    align-items: center;
    justify-content: flex-end;
}
nav.main a {
    color: var(--ink);
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    padding: 6px 4px;
}
nav.main a:hover { color: var(--accent-2); }
nav.main a.cta {
    background: var(--accent);
    color: #fff;
    padding: 11px 24px;
    border-radius: 4px;
    font-weight: 700;
    box-shadow: 0 2px 0 var(--accent-2);
}
nav.main a.cta:hover { background: var(--accent-2); color: #fff; }

@media (max-width: 700px) {
    .top-inner { justify-content: center; padding: 12px 0 16px; }
    .brand { flex: 1 1 100%; justify-content: center; }
    .brand img { height: 64px; }
    nav.main { flex: 1 1 100%; }
    nav.main ul { justify-content: center; gap: 14px; flex-wrap: wrap; }
    nav.main a { font-size: 0.86rem; padding: 5px 4px; }
    nav.main a.cta { padding: 8px 16px; font-size: 0.82rem; }
    nav.main a.cta .full { display: none; }
}
@media (min-width: 701px) { nav.main a.cta .short { display: none; } }
@media (max-width: 420px) {
    .brand img { height: 56px; }
    nav.main ul { gap: 12px; }
}

/* ---- hero ---- */
.hero {
    padding: 90px 0 80px;
    background:
        radial-gradient(circle at 78% 28%, rgba(244,124,44,0.22) 0%, transparent 55%),
        linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
    color: var(--paper);
    border-bottom: 4px solid var(--accent);
}
.hero .eyebrow {
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.22em;
    margin-bottom: 16px;
}
.hero h1 { color: #fff; font-size: clamp(2.6rem, 6.5vw, 4.4rem); line-height: 1; margin-bottom: 0.3em; letter-spacing: 0.01em; }
.hero p.lede {
    font-size: 1.18rem;
    color: #e0ebf7;
    max-width: 60ch;
    margin: 0 0 30px;
    line-height: 1.55;
}
.hero-cta {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    padding: 16px 36px;
    font-family: 'Inter', system-ui, sans-serif;
    font-weight: 800;
    font-size: 1rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border: none;
    border-radius: 4px;
    box-shadow: 0 4px 0 var(--accent-2), 0 8px 18px -8px rgba(0,0,0,0.4);
}
.hero-cta:hover { background: #ff9347; color: #fff; }
.hero-cta.secondary {
    background: transparent;
    color: #fff;
    border: 2px solid var(--accent-3);
    box-shadow: none;
    padding: 14px 30px;
    margin-left: 10px;
}
.hero-cta.secondary:hover { background: var(--accent-3); color: var(--ink-3); }

/* ---- sections ---- */
.section { padding: 70px 0; }
.section + .section { border-top: 1px solid var(--rule); }
.section-intro { max-width: 760px; margin: 0 auto 40px; text-align: center; }
.section-intro .eyebrow {
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--accent-2);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: 12px;
}
.section-intro p { font-size: 1.1rem; color: var(--muted); }

/* ---- topics grid (link cards) ---- */
.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
    margin-top: 30px;
}
.topic-card {
    display: block;
    background: #fff;
    border: 1px solid var(--rule);
    border-left: 4px solid var(--accent);
    padding: 22px 22px;
    border-radius: 4px;
    color: var(--ink);
    border-bottom: 1px solid var(--rule);
    transition: transform 0.15s, box-shadow 0.15s;
}
.topic-card:hover {
    transform: translateY(-2px);
    border-left-color: var(--accent-2);
    box-shadow: 0 10px 22px -10px rgba(24,64,107,0.25);
}
.topic-card .label {
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.74rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--accent-2);
    font-weight: 700;
}
.topic-card .name {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.4rem;
    color: var(--ink);
    margin-top: 6px;
    letter-spacing: 0.01em;
}

/* ---- book grid ---- */
.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 220px));
    gap: 32px 22px;
    justify-content: start;
}
.book-card {
    border: none;
    background: transparent;
    padding: 0;
    color: var(--ink);
    transition: transform 0.15s;
    border-bottom: none;
}
.book-card:hover { transform: translateY(-4px); }
.book-card .cover-wrap {
    aspect-ratio: 2 / 3;
    background: var(--paper-2);
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 10px 24px -10px rgba(24,64,107,0.4), 0 2px 6px -2px rgba(0,0,0,0.15);
    margin-bottom: 14px;
    transition: box-shadow 0.15s;
}
.book-card:hover .cover-wrap {
    box-shadow: 0 18px 34px -14px rgba(24,64,107,0.5), 0 4px 10px -4px rgba(0,0,0,0.25);
}
.book-card .cover-wrap img {
    width: 100%; height: 100%;
    object-fit: contain;
    display: block;
}
.book-card .t {
    font-family: 'Lora', Georgia, serif;
    font-weight: 600;
    font-size: 0.94rem;
    line-height: 1.32;
    color: var(--ink);
    margin: 0;
}

/* ---- book detail ---- */
.book-detail { padding: 60px 0; }
.book-detail .crumb {
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.85rem;
    color: var(--muted);
    margin-bottom: 18px;
}
.book-detail .detail-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 50px;
    align-items: start;
}
@media (max-width: 700px) {
    .book-detail .detail-grid { grid-template-columns: 1fr; gap: 28px; }
    .book-detail .detail-cover { max-width: 240px; margin: 0 auto; }
}
.book-detail .detail-cover {
    aspect-ratio: 2 / 3;
    background: var(--paper-2);
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 14px 32px -10px rgba(24,64,107,0.45), 0 4px 10px -4px rgba(0,0,0,0.18);
}
.book-detail .detail-cover img { width: 100%; height: 100%; object-fit: contain; }
.book-detail h1 { font-size: clamp(2rem, 4.4vw, 3rem); margin-top: 0; }
.book-detail .by {
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.95rem;
    color: var(--muted);
    margin-bottom: 24px;
}
.book-detail .buy-row { display: flex; gap: 12px; flex-wrap: wrap; margin: 24px 0; }
.buy-btn {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    padding: 14px 28px;
    font-family: 'Inter', system-ui, sans-serif;
    font-weight: 800;
    font-size: 0.9rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border: none;
    border-radius: 4px;
    box-shadow: 0 3px 0 var(--accent-2);
}
.buy-btn:hover { background: #ff9347; color: #fff; }
.buy-btn.secondary {
    background: transparent;
    color: var(--ink);
    border: 2px solid var(--ink);
    box-shadow: none;
    padding: 12px 26px;
}
.buy-btn.secondary:hover { background: var(--ink); color: var(--paper); }

/* ---- SEO landing ---- */
.landing { padding: 50px 0; }
.landing .lead-block { max-width: 800px; margin: 0 auto 50px; }
.landing .lead-block p { font-size: 1.1rem; }
.landing .pick {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 26px;
    align-items: start;
    padding: 26px 0;
    border-bottom: 1px solid var(--rule);
}
.landing .pick:last-child { border-bottom: none; }
.landing .pick .cover {
    aspect-ratio: 2 / 3;
    background: var(--paper-2);
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 10px 24px -10px rgba(24,64,107,0.4);
    border: none;
}
.landing .pick .cover img { width: 100%; height: 100%; object-fit: contain; }
.landing .pick h3 { margin: 0 0 8px; font-size: 1.45rem; }
.landing .pick h3 a { color: var(--ink); border: none; }
.landing .pick .rank {
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--accent-2);
    text-transform: uppercase;
    letter-spacing: 0.18em;
    margin-bottom: 6px;
}
.landing .pick .reason { font-size: 1.02rem; color: var(--muted); margin: 0 0 12px; }
.landing .pick .pick-buys { display: flex; gap: 10px; flex-wrap: wrap; }
.landing .pick .buy-pill {
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.82rem;
    font-weight: 700;
    background: var(--accent);
    color: #fff;
    padding: 8px 18px;
    border-radius: 999px;
    border: none;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}
.landing .pick .buy-pill.secondary {
    background: transparent;
    color: var(--ink);
    border: 1.5px solid var(--ink);
}
@media (max-width: 700px) {
    .landing .pick { grid-template-columns: 100px 1fr; gap: 18px; }
}

/* ---- amazon invite ---- */
.amazon-invite {
    background: linear-gradient(135deg, var(--ink-2), var(--ink));
    color: var(--paper);
    padding: 70px 0;
    text-align: center;
    border-top: 4px solid var(--accent);
}
.amazon-invite h2 { color: #fff; margin: 0 0 14px; }
.amazon-invite p { color: #d8e3ee; max-width: 56ch; margin: 0 auto 26px; font-size: 1.1rem; }
.amazon-invite a.btn {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    padding: 18px 38px;
    font-family: 'Inter', system-ui, sans-serif;
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border: none;
    border-radius: 4px;
    box-shadow: 0 4px 0 var(--accent-2), 0 8px 18px -8px rgba(0,0,0,0.5);
}
.amazon-invite a.btn:hover { background: #ff9347; color: #fff; }

/* ---- footer ---- */
footer.foot {
    background: var(--ink-3);
    color: #a8b8cc;
    padding: 50px 0 30px;
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.92rem;
    border-top: 4px solid var(--accent);
}
footer.foot a { color: var(--accent-3); border: none; }
footer.foot a:hover { color: #fff; }
footer.foot h4 {
    font-family: 'Bebas Neue', sans-serif;
    color: #fff;
    font-size: 1.15rem;
    margin: 0 0 14px;
    letter-spacing: 0.03em;
}
footer.foot .grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
}
@media (max-width: 700px) { footer.foot .grid { grid-template-columns: 1fr; gap: 28px; } }
footer.foot .copy {
    margin-top: 30px;
    padding-top: 22px;
    border-top: 1px solid rgba(244,124,44,0.25);
    font-size: 0.82rem;
    color: #6e7c8c;
}