/* Shared styles for the project case-study pages. Tokens match index.html. */
:root {
    --bg: #FAFAF7;
    --bg-alt: #F3F2EC;
    --surface: #FFFFFF;
    --surface-2: #F7F6F1;
    --border: #E4E2DA;
    --border-strong: #CFCCC1;

    --text: #14161A;
    --text-2: #454A54;
    --text-3: #6A6F7A;

    --accent: #0B7A62;
    --accent-strong: #08604D;
    --accent-ink: #FFFFFF;
    --accent-soft: #E1F2EC;

    --shadow: 0 1px 2px rgba(20, 22, 26, .04), 0 8px 24px -12px rgba(20, 22, 26, .12);

    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

    --container: 1120px;
    --radius: 14px;
    --radius-sm: 8px;
    --ease: cubic-bezier(.2, .7, .2, 1);
}

[data-theme="dark"] {
    --bg: #0D0F12;
    --bg-alt: #11141A;
    --surface: #151920;
    --surface-2: #1A1F27;
    --border: #252A33;
    --border-strong: #353B46;

    --text: #ECEEF1;
    --text-2: #A9AFBB;
    --text-3: #868D9B;

    --accent: #3DDBA9;
    --accent-strong: #6BE8C0;
    --accent-ink: #05241B;
    --accent-soft: rgba(61, 219, 169, .10);

    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 12px 32px -16px rgba(0, 0, 0, .6);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.65;
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; color: inherit; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.skip-link {
    position: absolute; left: 16px; top: -60px; z-index: 3000;
    background: var(--accent); color: var(--accent-ink);
    padding: 10px 16px; border-radius: var(--radius-sm); font-weight: 600;
    transition: top .2s;
}
.skip-link:focus { top: 16px; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 840px; }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 20px; border-radius: 10px;
    font-size: 15px; font-weight: 550;
    border: 1px solid transparent; cursor: pointer;
    transition: background-color .2s var(--ease), border-color .2s var(--ease), color .2s;
}
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: var(--accent-strong); }
.btn-ghost { background: transparent; border-color: var(--border-strong); color: var(--text); }
.btn-ghost:hover { background: var(--surface); border-color: var(--text-3); }
.nav .btn { padding: 8px 14px; font-size: 14px; }
.icon-btn {
    width: 38px; height: 38px; border-radius: 10px;
    display: grid; place-items: center;
    background: transparent; border: 1px solid var(--border);
    color: var(--text-2); cursor: pointer;
    transition: background-color .2s, color .2s, border-color .2s;
}
.icon-btn:hover { background: var(--surface); color: var(--text); border-color: var(--border-strong); }

/* ===== NAV ===== */
.nav {
    position: fixed; inset: 0 0 auto 0; z-index: 1000;
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    -webkit-backdrop-filter: saturate(160%) blur(14px);
    backdrop-filter: saturate(160%) blur(14px);
    border-bottom: 1px solid var(--border);
}
.nav .container { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; letter-spacing: -.01em; white-space: nowrap; }
.brand-mark {
    width: 30px; height: 30px; border-radius: 8px;
    background: var(--text); color: var(--bg);
    display: grid; place-items: center;
    font-family: var(--mono); font-size: 12px; font-weight: 500;
}
.nav-actions { display: flex; align-items: center; gap: 8px; }
.nav-link { padding: 8px 12px; border-radius: 8px; font-size: 14px; font-weight: 500; color: var(--text-2); transition: color .2s, background-color .2s; }
.nav-link:hover { color: var(--text); background: var(--surface-2); }

/* ===== PAGE HEAD ===== */
.page-head { padding: 132px 0 36px; }
.crumbs { font-family: var(--mono); font-size: 12.5px; color: var(--text-3); margin-bottom: 22px; }
.crumbs a:hover { color: var(--accent); }
.crumbs span[aria-current] { color: var(--text-2); }
.eyebrow {
    font-family: var(--mono); font-size: 12px; font-weight: 500;
    letter-spacing: .08em; text-transform: uppercase;
    color: var(--accent); margin-bottom: 14px;
}
h1, h2, h3 { line-height: 1.15; letter-spacing: -.02em; font-weight: 650; }
h1 { font-size: clamp(32px, 5vw, 48px); letter-spacing: -.035em; margin-bottom: 18px; }
.lead { font-size: 19px; color: var(--text-2); max-width: 62ch; }

.badge {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 12px; font-weight: 600;
    padding: 4px 10px; border-radius: 999px;
    background: var(--accent-soft); color: var(--accent);
    margin-bottom: 18px;
}
.badge::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }

.facts {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 20px 28px;
    margin-top: 32px; padding: 22px 24px;
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
}
.fact dt { font-family: var(--mono); font-size: 11px; letter-spacing: .07em; text-transform: uppercase; color: var(--text-3); margin-bottom: 2px; }
.fact dd { font-size: 15px; font-weight: 550; }
.fact dd.big { font-size: 30px; font-weight: 650; letter-spacing: -.03em; line-height: 1.1; }

/* ===== ARTICLE ===== */
.content { padding: 28px 0 72px; }
.block { margin-bottom: 44px; }
.block h2 { font-size: 26px; margin-bottom: 14px; }
.block h3 { font-size: 18px; margin: 22px 0 6px; letter-spacing: -.01em; }
.block p { color: var(--text-2); margin-bottom: 14px; max-width: 68ch; }
.block p strong, .block li strong { color: var(--text); font-weight: 600; }
.points { display: grid; gap: 12px; margin-bottom: 14px; max-width: 68ch; }
.points li { position: relative; padding-left: 22px; color: var(--text-2); }
.points li::before {
    content: ''; position: absolute; left: 0; top: .75em;
    width: 9px; height: 2px; background: var(--accent); border-radius: 2px;
}
.flow {
    display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
    margin: 6px 0 16px;
}
.flow .node {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 10px; padding: 8px 14px; font-size: 14px; font-weight: 550;
}
.flow .arrow { color: var(--text-3); font-family: var(--mono); font-size: 14px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
    overflow-wrap: anywhere;
    font-family: var(--mono); font-size: 12px;
    padding: 4px 10px; border-radius: 6px;
    background: var(--surface-2); border: 1px solid var(--border); color: var(--text-2);
}
.note {
    margin-top: 8px; padding: 16px 18px;
    background: var(--surface); border: 1px solid var(--border); border-left: 3px solid var(--accent);
    border-radius: var(--radius-sm); color: var(--text-2); font-size: 15px; max-width: 68ch;
}

/* ===== RELATED + CTA ===== */
.related-wrap { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 64px 0; }
.related-wrap h2 { font-size: 24px; margin-bottom: 20px; }
.related { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.related a {
    display: block; padding: 20px; background: var(--surface);
    border: 1px solid var(--border); border-radius: var(--radius);
    transition: border-color .2s, box-shadow .2s;
}
.related a:hover { border-color: var(--border-strong); box-shadow: var(--shadow); }
.related strong { display: block; font-size: 16px; margin-bottom: 4px; }
.related span { font-size: 14px; color: var(--text-2); }
.cta { padding: 64px 0; }
.cta h2 { font-size: clamp(26px, 3.6vw, 34px); margin-bottom: 12px; letter-spacing: -.03em; }
.cta p { color: var(--text-2); margin-bottom: 24px; max-width: 52ch; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* ===== FOOTER ===== */
footer { padding: 36px 0; border-top: 1px solid var(--border); }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; font-size: 14px; color: var(--text-3); }
.footer-links { display: flex; gap: 20px; }
.footer-links a:hover { color: var(--text); }

@media (max-width: 560px) {
    .container { padding: 0 20px; }
    .page-head { padding-top: 112px; }
    .lead { font-size: 17px; }
    .nav-link { display: none; }
}
@media (hover: none) and (pointer: coarse) {
    .icon-btn { width: 44px; height: 44px; }
    .btn { min-height: 44px; }
}