/* Shared styles for product-strategy case studies and the Builds page.
   Tokens match index.html so every page feels like one site. */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --text-primary: #000000;
    --text-secondary: #525252;
    --text-muted: #8a8a8a;
    --border-color: #e5e5e5;
    --accent-color: #6366f1;
    --accent-bg: #f0f0ff;
    --accent-border: #e0e0ff;
    --good: #15803d;
    --good-bg: #f0fdf4;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 17px;
    overflow-x: hidden;
}

a { color: inherit; }

.wrap { max-width: 1120px; margin: 0 auto; padding-left: 48px; padding-right: 48px; }
.narrow { max-width: 760px; }

/* ---------- Top bar ---------- */
.topbar {
    position: sticky; top: 0; z-index: 10;
    background: rgba(255,255,255,0.92);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--border-color);
}
.topbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; height: 68px; }
.logo { font-family: 'DM Sans', sans-serif; font-weight: 600; font-size: 18px; color: var(--text-primary); text-decoration: none; }
.top-links { display: flex; gap: 28px; align-items: center; }
.top-link { font-size: 15px; text-decoration: none; color: var(--text-secondary); }
.top-link:hover, .top-link.active { color: var(--text-primary); }

/* ---------- Lens switch (strategy / design) ---------- */
.lens {
    display: inline-flex; padding: 4px; gap: 4px;
    background: var(--bg-secondary); border: 1px solid var(--border-color);
    border-radius: 999px;
}
.lens a, .lens button {
    font: 500 14px 'Inter', sans-serif; color: var(--text-secondary);
    padding: 8px 16px; border-radius: 999px; text-decoration: none;
    border: 0; background: transparent; cursor: pointer; white-space: nowrap;
}
.lens a:hover, .lens button:hover { color: var(--text-primary); }
.lens .on, .lens [aria-selected="true"] {
    background: var(--text-primary); color: #fff;
}

/* ---------- Case study hero ---------- */
.cs-hero { padding-top: 88px; padding-bottom: 56px; }
.eyebrow {
    font-size: 13px; font-weight: 600; letter-spacing: 1.2px; text-transform: uppercase;
    color: var(--accent-color); margin-bottom: 20px;
}
.cs-title {
    font-family: 'DM Sans', sans-serif; font-weight: 700; color: var(--text-primary);
    font-size: 60px; line-height: 1.08; letter-spacing: -1.6px; margin-bottom: 24px; max-width: 900px;
}
.cs-sub { font-size: 21px; line-height: 1.6; max-width: 760px; }

/* At a glance */
.glance {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
    background: var(--border-color); border: 1px solid var(--border-color);
    border-radius: 16px; overflow: hidden; margin: 48px 0 24px;
}
.glance div { background: var(--bg-primary); padding: 24px; }
.glance dt, .k {
    font-size: 12px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase;
    color: var(--text-muted); margin-bottom: 8px;
}
.glance dd { font-size: 15px; line-height: 1.55; color: var(--text-primary); }

/* Metrics */
.metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin: 40px 0; }
.metric { border: 1px solid var(--border-color); border-radius: 16px; padding: 28px; background: var(--bg-secondary); }
.metric-v { font-family: 'DM Sans', sans-serif; font-size: 40px; font-weight: 700; color: var(--text-primary); line-height: 1.1; letter-spacing: -1px; }
.metric-l { font-size: 14px; margin-top: 8px; line-height: 1.5; }

/* ---------- Body sections ---------- */
.cs-body { padding-bottom: 40px; }
.sec { padding: 64px 0; border-top: 1px solid var(--border-color); }
.sec-num { font-size: 13px; font-weight: 600; color: var(--text-muted); letter-spacing: 1px; margin-bottom: 12px; }
.sec h2 {
    font-family: 'DM Sans', sans-serif; font-size: 36px; line-height: 1.2; letter-spacing: -0.8px;
    color: var(--text-primary); margin-bottom: 24px; max-width: 820px;
}
.sec h3 { font-family: 'DM Sans', sans-serif; font-size: 21px; color: var(--text-primary); margin: 32px 0 12px; }
.sec p { margin-bottom: 18px; max-width: 760px; }
.sec ul, .sec ol { margin: 0 0 18px 22px; max-width: 760px; }
.sec li { margin-bottom: 10px; }
strong { color: var(--text-primary); font-weight: 600; }

.quote {
    border-left: 3px solid var(--text-primary); padding: 4px 0 4px 24px; margin: 28px 0;
    font-family: 'DM Sans', sans-serif; font-size: 22px; line-height: 1.5; color: var(--text-primary); max-width: 760px;
}
.quote cite { display: block; font: 400 14px 'Inter', sans-serif; color: var(--text-muted); margin-top: 10px; font-style: normal; }

.callout {
    border: 1px solid var(--accent-border); background: var(--accent-bg);
    border-radius: 14px; padding: 22px 26px; margin: 28px 0; max-width: 820px;
}
.callout .k { color: var(--accent-color); }
.callout p:last-child { margin-bottom: 0; }

.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 28px 0; }
.compare > div { border: 1px solid var(--border-color); border-radius: 14px; padding: 24px; }
.compare > div.pick { border-color: var(--text-primary); box-shadow: 0 0 0 1px var(--text-primary); }
.compare h4 { font-family: 'DM Sans', sans-serif; font-size: 18px; color: var(--text-primary); margin-bottom: 8px; }
.compare p { font-size: 15px; margin-bottom: 8px; }
.tagpick { display: inline-block; font-size: 12px; font-weight: 600; color: #fff; background: var(--text-primary); border-radius: 999px; padding: 2px 10px; margin-bottom: 10px; }

table.t { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 15px; max-width: 900px; }
table.t th, table.t td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--border-color); vertical-align: top; }
table.t th { font-size: 12px; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); font-weight: 600; }
table.t td:first-child { color: var(--text-primary); font-weight: 500; }
.tablewrap { overflow-x: auto; }

.lessons { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin: 24px 0; }
.lessons div { border: 1px solid var(--border-color); border-radius: 14px; padding: 22px; }
.lessons h4 { font-family: 'DM Sans', sans-serif; font-size: 17px; color: var(--text-primary); margin-bottom: 6px; }
.lessons p { font-size: 15px; margin: 0; }

.next-cta {
    display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap;
    border: 1px solid var(--border-color); border-radius: 18px; padding: 32px; margin: 24px 0 80px; background: var(--bg-secondary);
}
.next-cta h3 { font-family: 'DM Sans', sans-serif; font-size: 22px; color: var(--text-primary); margin-bottom: 4px; }
.btn {
    display: inline-block; padding: 12px 24px; border-radius: 8px; font-size: 15px; font-weight: 500;
    text-decoration: none; background: var(--text-primary); color: #fff; border: 1px solid var(--text-primary);
}
.btn.ghost { background: transparent; color: var(--text-primary); }

footer { border-top: 1px solid var(--border-color); padding: 32px 0; font-size: 14px; color: var(--text-muted); }
footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
footer a { color: var(--text-secondary); text-decoration: none; margin-left: 20px; }

/* Figures */
.figure { margin: 32px 0; }
.figure img { width: 100%; height: auto; display: block; border: 1px solid var(--border-color); border-radius: 16px; background: var(--bg-secondary); }
.figure figcaption { font-size: 14px; color: var(--text-muted); margin-top: 10px; max-width: 760px; }
.hero-fig { margin-top: 8px; }
.before-after { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.before-after .figure { margin: 16px 0; }
.screen-row { display: flex; gap: 24px; justify-content: center; margin: 40px 0; flex-wrap: wrap; }
.screen-row figure { flex: 0 1 200px; margin: 0; text-align: center; }
.screen-row img { width: 100%; height: auto; border-radius: 20px; border: 1px solid var(--border-color); box-shadow: 0 4px 16px rgba(0,0,0,0.06); display: block; }
.screen-row figcaption { font-size: 13px; color: var(--text-secondary); margin-top: 10px; }
@media (max-width: 700px) { .before-after { grid-template-columns: 1fr; } .screen-row figure { flex-basis: 45%; } }

/* ---------- Builds page ---------- */
.builds-hero { padding: 88px 0 40px; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 32px 0 8px; }
.chip {
    font: 500 14px 'Inter', sans-serif; padding: 8px 14px; border-radius: 999px;
    border: 1px solid var(--border-color); background: #fff; color: var(--text-secondary); cursor: pointer;
}
.chip[aria-pressed="true"] { background: var(--text-primary); border-color: var(--text-primary); color: #fff; }

.build {
    display: grid; grid-template-columns: 340px 1fr; gap: 48px;
    padding: 56px 0; border-top: 1px solid var(--border-color); scroll-margin-top: 90px;
}
.build-side .date { font-size: 13px; color: var(--text-muted); margin-bottom: 10px; }
.build-side h2 { font-family: 'DM Sans', sans-serif; font-size: 30px; line-height: 1.15; letter-spacing: -0.6px; color: var(--text-primary); margin-bottom: 10px; }
.build-side .one { font-size: 16px; margin-bottom: 16px; }
.status { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 500; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--border-color); margin: 0 6px 8px 0; }
.status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--text-muted); }
.status.live::before { background: #22c55e; }
.status.testing::before { background: #f59e0b; }
.status.proto::before { background: #a3a3a3; }
.stack { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.stack span { font-size: 12px; padding: 3px 9px; border-radius: 6px; background: var(--bg-secondary); border: 1px solid var(--border-color); }
.build-side .links { margin-top: 18px; font-size: 15px; }
.build-side .links a { color: var(--accent-color); text-decoration: none; font-weight: 500; }
.build-main h3 { font-family: 'DM Sans', sans-serif; font-size: 13px; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin: 0 0 8px; }
.build-main p { margin-bottom: 22px; }
.build-main ul { margin: 0 0 22px 20px; }
.build-main li { margin-bottom: 8px; }
.build-main img { width: 100%; height: auto; border-radius: 14px; border: 1px solid var(--border-color); margin: 4px 0 24px; display: block; }
.build-main .proof { border-left: 3px solid #22c55e; background: var(--good-bg); padding: 14px 18px; border-radius: 0 10px 10px 0; margin-bottom: 22px; color: var(--text-primary); }
.build[hidden] { display: none; }
.shot { margin: 4px 0 24px; }
.shot img { margin: 0; background: var(--bg-secondary); }
.shot a { display: block; }
.shot a:hover img { border-color: var(--text-primary); }
.shot figcaption { font-size: 13px; color: var(--text-muted); margin-top: 8px; }
.shot.small { max-width: 360px; }
.shots-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: start; }
.shots-2 img { width: 100%; height: auto; }
@media (max-width: 560px) { .shots-2 { grid-template-columns: 1fr; } }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .wrap { padding-left: 24px; padding-right: 24px; }
    .cs-title { font-size: 40px; letter-spacing: -1px; }
    .cs-sub { font-size: 18px; }
    .glance { grid-template-columns: 1fr 1fr; }
    .compare { grid-template-columns: 1fr; }
    .sec { padding: 48px 0; }
    .sec h2 { font-size: 28px; }
    .build { grid-template-columns: 1fr; gap: 20px; padding: 40px 0; }
    .top-links { gap: 16px; }
    .top-links .hide-sm { display: none; }
}
@media (max-width: 560px) {
    .wrap { padding-left: 16px; padding-right: 16px; }
    .glance { grid-template-columns: 1fr; }
    .cs-title { font-size: 34px; }
    .topbar-inner { height: auto; padding: 12px 0; flex-wrap: wrap; }
}