/* ============================================================
   Osiris Industries — shared site styles
   Signature monochrome editorial system. Color lives only in
   the emblem mark; the interface stays black & white.
   ============================================================ */

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

:root {
    --ink: #f1f1ef;
    --ink-soft: #cfcfca;
    --paper: #0b0b0c;
    --paper-2: #0f0f10;
    --mute: #8a8a86;
    --rule: rgba(255, 255, 255, 0.10);
    --rule-strong: rgba(255, 255, 255, 0.70);
    --accent: #5aa172;            /* echo of the emblem green — used only as a hairline */
    --serif: "Fraunces", "Times New Roman", serif;
    --sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
    --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

html { font-size: 17px; -webkit-font-smoothing: antialiased; scroll-behavior: smooth; }

body {
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    line-height: 1.55;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

/* ---------- Depth layers ---------- */
.depth { position: fixed; inset: 0; pointer-events: none; z-index: 0; }
.depth-atmos {
    background:
        radial-gradient(ellipse 1400px 900px at 50% -10%,
            rgba(255,255,255,0.07) 0%, rgba(255,255,255,0.025) 30%, transparent 60%),
        radial-gradient(ellipse 900px 700px at 50% 110%,
            rgba(255,255,255,0.04) 0%, transparent 55%);
}
.depth-lattice {
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='44' height='44' viewBox='0 0 44 44'><circle cx='22' cy='22' r='0.7' fill='%23ffffff' fill-opacity='0.10'/></svg>");
    background-size: 44px 44px;
    mask-image: radial-gradient(ellipse 1100px 800px at 50% 30%, black 0%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 1100px 800px at 50% 30%, black 0%, transparent 75%);
}
.depth-grain {
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.55 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
    background-size: 240px 240px;
    opacity: 0.10;
    mix-blend-mode: overlay;
}

/* ---------- Frame ---------- */
.frame {
    position: relative;
    z-index: 4;
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 32px;
}

/* ---------- Nav ---------- */
.nav {
    position: relative;
    z-index: 5;
    max-width: 1080px;
    margin: 0 auto;
    padding: 22px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    border-bottom: 1px solid var(--rule);
}
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand img { width: 30px; height: 30px; display: block; }
.brand-name {
    font-family: var(--mono);
    font-size: 13px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--ink);
}
.nav-links {
    display: flex;
    gap: 26px;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.10em;
    text-transform: uppercase;
    color: var(--mute);
}
.nav-links a { position: relative; padding-bottom: 4px; transition: color 0.18s ease; }
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--ink); }
.nav-links a.active::after {
    content: ""; position: absolute; left: 0; right: 0; bottom: -1px;
    height: 1px; background: var(--accent);
}
@media (max-width: 680px) {
    .nav { flex-direction: column; align-items: flex-start; gap: 14px; }
    .nav-links { flex-wrap: wrap; gap: 16px 20px; }
}

/* ---------- Page rhythm ---------- */
section {
    padding: 84px 0;
    border-top: 1px solid var(--rule);
    position: relative;
}
section:first-of-type { border-top: none; }

.eyebrow, .section-label {
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--mute);
    margin-bottom: 10px;
}
.section-title {
    font-family: var(--serif);
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.015em;
    margin-bottom: 34px;
    max-width: 24ch;
    color: var(--ink);
}
.section-title em { font-style: italic; font-weight: 300; }

.prose { max-width: 64ch; }
.prose p { color: var(--ink-soft); font-size: 1.05rem; line-height: 1.7; }
.prose p + p { margin-top: 22px; }

/* ---------- Hero ---------- */
.hero { padding: 120px 0 96px; }
.hero-mark { width: 76px; height: 76px; margin-bottom: 34px; display: block; }
.wordmark {
    font-family: var(--serif);
    font-weight: 400;
    font-size: clamp(3rem, 9vw, 6.6rem);
    line-height: 0.95;
    letter-spacing: -0.025em;
    color: var(--ink);
}
.wordmark .sub {
    display: block;
    font-style: italic;
    font-weight: 300;
}
.hero-rule { width: 80px; height: 1px; background: var(--rule-strong); margin: 48px 0 32px; }
.hero-rule.accent { background: var(--accent); width: 56px; }
.tagline {
    font-family: var(--serif);
    font-size: clamp(1.3rem, 2.6vw, 1.9rem);
    font-weight: 400;
    line-height: 1.35;
    color: var(--ink);
    max-width: 30ch;
}
.lede { margin-top: 26px; font-size: 1.05rem; color: var(--ink-soft); max-width: 58ch; line-height: 1.7; }

/* ---------- Buttons ---------- */
.btn-row { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 38px; }
.btn {
    display: inline-flex; align-items: center; gap: 10px;
    font-family: var(--mono);
    font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase;
    padding: 13px 22px; border-radius: 4px;
    border: 1px solid var(--rule-strong);
    color: var(--ink);
    transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn--ghost { border-color: var(--rule); color: var(--ink-soft); }
.btn--ghost:hover { background: transparent; color: var(--ink); border-color: var(--rule-strong); }
.btn .arr { transition: transform 0.18s ease; }
.btn:hover .arr { transform: translateX(3px); }

/* ---------- Division / link cards ---------- */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 0;
    border: 1px solid var(--rule);
    border-radius: 6px;
    overflow: hidden;
}
.card {
    display: flex; flex-direction: column;
    padding: 40px 34px;
    border-right: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    transition: background 0.2s ease;
}
.card:hover { background: rgba(255,255,255,0.018); }
.card-idx {
    font-family: var(--mono);
    font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase;
    color: var(--mute); margin-bottom: 20px;
}
.card-h {
    font-family: var(--serif);
    font-size: 1.5rem; font-weight: 500; line-height: 1.15;
    margin-bottom: 8px; color: var(--ink);
}
.card-sub {
    font-family: var(--mono);
    font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
    color: var(--accent); margin-bottom: 18px;
}
.card-p { font-size: 0.97rem; color: var(--ink-soft); line-height: 1.65; flex: 1; }
.card-link {
    margin-top: 22px;
    font-family: var(--mono);
    font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--ink); display: inline-flex; align-items: center; gap: 8px;
}
.card-link .arr { transition: transform 0.18s ease; }
.card:hover .card-link .arr { transform: translateX(4px); }

/* ---------- Capability grid (4 groups) ---------- */
.capgrid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 0;
    border-top: 1px solid var(--rule);
}
.cap {
    padding: 36px 30px;
    border-bottom: 1px solid var(--rule);
}
.cap:not(:last-child) { border-right: 1px solid var(--rule); }
.cap-h {
    font-family: var(--serif);
    font-size: 1.2rem; font-weight: 500; margin-bottom: 18px; color: var(--ink);
}
.cap ul { list-style: none; }
.cap li {
    font-size: 0.92rem; color: var(--ink-soft);
    padding: 6px 0 6px 18px; position: relative; line-height: 1.45;
}
.cap li::before {
    content: ""; position: absolute; left: 0; top: 14px;
    width: 6px; height: 1px; background: var(--mute);
}
@media (max-width: 720px) { .cap:not(:last-child) { border-right: none; } }

/* ---------- Values triad ---------- */
.triad {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0;
    border: 1px solid var(--rule); border-radius: 6px; overflow: hidden;
}
.triad .tcol { padding: 36px 30px; border-right: 1px solid var(--rule); }
.triad .tcol:last-child { border-right: none; }
.tnum { font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; color: var(--mute); margin-bottom: 16px; }
.th { font-family: var(--serif); font-size: 1.3rem; font-weight: 500; margin-bottom: 12px; }
.tp { font-size: 0.95rem; color: var(--ink-soft); line-height: 1.6; }
@media (max-width: 720px) { .triad .tcol { border-right: none; border-bottom: 1px solid var(--rule); } }

/* ---------- Brand plate (light lockup on light card) ---------- */
.plate {
    background: #f4f4f1;
    border-radius: 8px;
    padding: 44px;
    display: flex; justify-content: center; align-items: center;
    box-shadow: 0 1px 0 rgba(255,255,255,0.06) inset, 0 30px 80px -40px rgba(0,0,0,0.8);
}
.plate img { width: 100%; max-width: 460px; height: auto; display: block; }

/* ---------- Quote / manifesto ---------- */
.manifesto {
    border-top: 1px solid var(--rule-strong);
    border-bottom: 1px solid var(--rule-strong);
    padding: 96px 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.018) 0%, transparent 100%), var(--paper-2);
    text-align: center;
}
.manifesto .big {
    font-family: var(--serif);
    font-size: clamp(1.7rem, 4.4vw, 3rem);
    font-weight: 300; font-style: italic; line-height: 1.12;
    letter-spacing: -0.02em; max-width: 20ch; margin: 0 auto 28px; color: var(--ink);
}
.manifesto .small { font-size: 1.05rem; color: var(--ink-soft); max-width: 58ch; margin: 0 auto; line-height: 1.7; }

/* ---------- Two-column duo ---------- */
.duo { display: grid; grid-template-columns: 1fr 1px 1fr; gap: 0 52px; max-width: 86ch; align-items: start; }
.duo-divider { background: var(--rule); align-self: stretch; }
.duo-num { font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--mute); margin-bottom: 18px; }
.duo-h { font-family: var(--serif); font-size: 1.4rem; font-weight: 500; line-height: 1.2; margin-bottom: 16px; }
.duo-h em { font-style: italic; font-weight: 400; }
.duo-p { font-size: 1rem; color: var(--ink-soft); line-height: 1.7; }
@media (max-width: 720px) { .duo { grid-template-columns: 1fr; gap: 38px; } .duo-divider { display: none; } }

/* ---------- Case studies ---------- */
.case {
    border: 1px solid var(--rule);
    border-radius: 6px;
    padding: 38px 34px;
    margin-top: 24px;
    background: var(--paper-2);
    transition: border-color 0.2s ease, transform 0.2s ease;
}
.case:hover { border-color: rgba(255,255,255,0.22); transform: translateY(-2px); }
.case-top { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; margin-bottom: 8px; }
.case-name { font-family: var(--serif); font-size: 1.5rem; font-weight: 500; color: var(--ink); }
.case-kind { font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); }
.case-meta { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--mute); margin-bottom: 22px; }
.case-body { display: grid; grid-template-columns: 1.4fr 1fr; gap: 36px; }
.case-body p { font-size: 0.98rem; color: var(--ink-soft); line-height: 1.7; }
.case-result { border-left: 1px solid var(--rule); padding-left: 24px; }
.case-result .r-label { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--mute); margin-bottom: 8px; }
.case-result .r-value { font-family: var(--serif); font-size: 1.25rem; line-height: 1.25; color: var(--ink); margin-bottom: 20px; }
.case-services { font-size: 0.85rem; color: var(--mute); line-height: 1.6; }
.case-quote { margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--rule); font-family: var(--serif); font-style: italic; font-size: 1.05rem; color: var(--ink); line-height: 1.5; }
@media (max-width: 720px) { .case-body { grid-template-columns: 1fr; gap: 24px; } .case-result { border-left: none; padding-left: 0; border-top: 1px solid var(--rule); padding-top: 22px; } }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 56px; align-items: start; }
.field-list { border-top: 1px solid var(--rule); }
.field { padding: 22px 0; border-bottom: 1px solid var(--rule); }
.field-k { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--mute); margin-bottom: 6px; }
.field-v { font-size: 1.05rem; color: var(--ink); }
.field-v a { border-bottom: 1px solid var(--rule-strong); padding-bottom: 1px; }
@media (max-width: 720px) { .contact-grid { grid-template-columns: 1fr; gap: 36px; } }

/* ---------- Steps ---------- */
.steps { counter-reset: step; max-width: 60ch; }
.step { display: grid; grid-template-columns: 44px 1fr; gap: 18px; padding: 22px 0; border-top: 1px solid var(--rule); }
.step:first-child { border-top: none; }
.step-n { font-family: var(--mono); font-size: 12px; color: var(--mute); padding-top: 4px; }
.step-h { font-family: var(--serif); font-size: 1.2rem; font-weight: 500; margin-bottom: 6px; }
.step-p { font-size: 0.97rem; color: var(--ink-soft); line-height: 1.6; }

/* ---------- Footer ---------- */
footer.site {
    padding: 56px 0 72px;
    border-top: 1px solid var(--rule);
    display: flex; justify-content: space-between; align-items: center;
    gap: 24px; flex-wrap: wrap;
}
.foot-brand { display: inline-flex; align-items: center; gap: 12px; }
.foot-brand img { width: 26px; height: 26px; }
.foot-meta { font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--mute); }
.foot-links { display: flex; gap: 20px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--mute); }
.foot-links a:hover { color: var(--ink); }
.foot-motto { font-family: var(--serif); font-style: italic; color: var(--ink); font-size: 1rem; }

@media (max-width: 720px) {
    .frame { padding: 0 22px; }
    .nav { padding: 18px 22px; }
    .hero { padding: 80px 0 64px; }
    section { padding: 60px 0; }
    .manifesto { padding: 68px 0; }
    footer.site { flex-direction: column; align-items: flex-start; }
}

/* ---------- Dark brand block (division lockup, on-brand) ---------- */
.brandblock {
    background:
        radial-gradient(ellipse 700px 360px at 50% 0%, rgba(255,255,255,0.035), transparent 70%),
        var(--paper-2);
    border: 1px solid var(--rule);
    border-radius: 8px;
    padding: 64px 40px;
    display: flex; flex-direction: column; align-items: center; text-align: center;
}
.brandblock img { width: 132px; height: auto; display: block; margin-bottom: 28px;
    filter: drop-shadow(0 18px 40px rgba(0,0,0,0.55)); }
.brandblock-word {
    font-family: var(--serif);
    font-size: clamp(2rem, 6vw, 3.4rem);
    font-weight: 400; letter-spacing: 0.02em; line-height: 1; color: var(--ink);
}
.brandblock-word span { font-style: italic; font-weight: 300; }
.brandblock-rule { width: 56px; height: 1px; background: var(--accent); margin: 24px 0 18px; }
.brandblock-cap {
    font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em;
    text-transform: uppercase; color: var(--mute);
}