/* ==========================================================================
   One Stop Mechanical — framework stylesheet
   Premium dark theme · brass accent · editorial serif display.
   Mobile-first. Tokens → base → layout → components.
   ========================================================================== */

:root {
    --bg:        #0f1216;
    --bg-2:      #14181e;
    --surface:   #181d24;
    --surface-2: #1e242c;
    --line:      rgba(255,255,255,0.08);
    --line-2:    rgba(255,255,255,0.16);

    --text:      #eae7df;
    --text-2:    #b9bdc4;
    --muted:     #868d97;

    --brass:     #c9a45e;
    --brass-2:   #ddbd80;
    --brass-d:   #a07f3d;
    --steel:     #7d8a99;

    --serif: "Cormorant Garamond", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
    --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Arial, sans-serif;

    --container: 1180px;
    --radius:    4px;
    --radius-lg: 10px;
    --shadow:    0 24px 60px -20px rgba(0,0,0,0.6);
    --t:         260ms cubic-bezier(.2,.7,.2,1);

    --s1:.25rem; --s2:.5rem; --s3:.75rem; --s4:1rem; --s5:1.5rem;
    --s6:2rem; --s7:3rem; --s8:4rem; --s9:6rem; --s10:8rem;
}

*,*::before,*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    font-size: 1rem;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1,h2,h3,h4 { font-family: var(--serif); font-weight: 500; line-height: 1.08; letter-spacing: .005em; margin: 0 0 .4em; }
p { margin: 0 0 1rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }

.skip-link { position: absolute; left: -9999px; top: 0; background: var(--brass); color: #1a1207; padding: .5rem 1rem; z-index: 200; }
.skip-link:focus { left: 1rem; top: 1rem; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 1.5rem; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; gap: .55rem;
    font-family: var(--sans); font-weight: 500; font-size: .92rem;
    letter-spacing: .02em; line-height: 1;
    padding: .92rem 1.5rem; border-radius: var(--radius);
    border: 1px solid var(--line-2); color: var(--text);
    background: transparent; cursor: pointer; transition: all var(--t);
    white-space: nowrap;
}
.btn:hover { border-color: var(--brass); color: var(--brass-2); }
.btn-accent {
    background: linear-gradient(180deg, var(--brass-2), var(--brass));
    border-color: var(--brass); color: #1a1207; font-weight: 600;
}
.btn-accent:hover { filter: brightness(1.08); color: #1a1207; border-color: var(--brass-2); }
.btn-ghost { border-color: transparent; padding-left: 0; padding-right: 0; }
.btn-ghost:hover { color: var(--brass-2); }
.btn .arr { transition: transform var(--t); }
.btn:hover .arr { transform: translateX(3px); }

/* ---------- Header ---------- */
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(15,18,22,0.72);
    backdrop-filter: saturate(140%) blur(12px);
    -webkit-backdrop-filter: saturate(140%) blur(12px);
    border-bottom: 1px solid var(--line);
}
.header-row { display: flex; align-items: center; gap: 1.5rem; min-height: 74px; }
.brand { display: inline-flex; align-items: center; gap: .6rem; flex-shrink: 0; }
.brand-mark { color: var(--brass); }
.brand-word { font-family: var(--serif); font-size: 1.3rem; letter-spacing: .04em; text-transform: uppercase; }
.brand-accent { color: var(--brass-2); }
.site-nav { display: flex; align-items: center; gap: 1.6rem; margin-left: auto; }
.site-nav > a { font-size: .9rem; letter-spacing: .04em; color: var(--text-2); transition: color var(--t); position: relative; white-space: nowrap; }
.site-nav > a:not(.btn):hover { color: var(--text); }
.site-nav > a.is-current { color: var(--brass-2); }
.site-nav > a.is-current::after { content:""; position:absolute; left:0; right:0; bottom:-6px; height:1px; background: var(--brass); }
.nav-cta { margin-left: .4rem; }

.nav-toggle { display: none; margin-left: auto; width: 46px; height: 46px; background: none; border: 1px solid var(--line-2); border-radius: var(--radius); cursor: pointer; flex-direction: column; gap: 5px; align-items: center; justify-content: center; }
.nav-toggle span { width: 20px; height: 1.5px; background: var(--text); transition: var(--t); }
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 1024px) {
    .nav-toggle { display: flex; }
    .site-nav {
        position: absolute; top: 100%; left: 0; right: 0;
        flex-direction: column; align-items: stretch; gap: 0;
        background: var(--bg-2); border-bottom: 1px solid var(--line);
        padding: .5rem 1.5rem 1.25rem; margin-left: 0;
        clip-path: inset(0 0 100% 0); transition: clip-path var(--t); pointer-events: none;
    }
    .site-nav.is-open { clip-path: inset(0 0 0 0); pointer-events: auto; }
    .site-nav > a { padding: .9rem 0; border-bottom: 1px solid var(--line); font-size: 1rem; }
    .site-nav > a.is-current::after { display: none; }
    .nav-cta { margin: 1rem 0 0; justify-content: center; }
}

/* ---------- Section primitives ---------- */
.section { padding: var(--s9) 0; }
.section-sm { padding: var(--s8) 0; }
.eyebrow { display:inline-flex; align-items:center; gap:.6rem; font-family: var(--sans); font-size: .76rem; font-weight: 600; letter-spacing: .22em; text-transform: uppercase; color: var(--brass); margin-bottom: 1.1rem; }
.eyebrow::before { content:""; width: 28px; height: 1px; background: var(--brass); opacity:.7; }
.section-head { max-width: 720px; margin-bottom: var(--s7); }
.section-head h2 { font-size: clamp(2rem, 4vw, 3rem); }
.section-head p { color: var(--text-2); font-size: 1.08rem; }
.display { font-size: clamp(2.6rem, 6vw, 4.4rem); }
.lead { font-size: clamp(1.05rem, 2vw, 1.25rem); color: var(--text-2); }
.center { text-align: center; margin-left: auto; margin-right: auto; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: var(--s10) 0 var(--s9); border-bottom: 1px solid var(--line); }
.hero::before { /* blueprint grid */
    content:""; position:absolute; inset:0;
    background-image:
        linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
    background-size: 56px 56px; mask-image: radial-gradient(120% 90% at 70% 0%, #000 40%, transparent 80%);
    pointer-events: none;
}
.hero::after { /* brass glow + depth */
    content:""; position:absolute; inset:0; pointer-events:none;
    background:
        radial-gradient(60% 50% at 78% 8%, rgba(201,164,94,.22), transparent 70%),
        radial-gradient(50% 60% at 0% 100%, rgba(125,138,153,.12), transparent 70%);
}
.hero .container { position: relative; z-index: 1; }
.hero-inner { max-width: 880px; }
.hero h1 { margin-bottom: 1.4rem; }
.hero .lead { max-width: 620px; margin-bottom: 2.2rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 2.5rem; margin-top: var(--s8); padding-top: var(--s6); border-top: 1px solid var(--line); }
.hero-stats .stat strong { display:block; font-family: var(--serif); font-size: 2.4rem; color: var(--brass-2); line-height: 1; }
.hero-stats .stat span { font-size: .82rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }

/* ---------- Trust strip ---------- */
.trust { border-bottom: 1px solid var(--line); background: var(--bg-2); }
.trust .container { display:flex; flex-wrap:wrap; align-items:center; gap: 1rem 2.5rem; padding-top: 1.4rem; padding-bottom: 1.4rem; }
.trust .trust-label { font-size: .76rem; letter-spacing: .18em; text-transform: uppercase; color: var(--muted); }
.trust .trust-items { display:flex; flex-wrap:wrap; gap: 1.5rem 2rem; margin-left:auto; }
.trust .trust-items span { font-family: var(--serif); font-size: 1.15rem; color: var(--text-2); letter-spacing:.03em; }

/* ---------- Cards grid ---------- */
.grid { display: grid; gap: 1.25rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .grid-2 { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 880px) { .grid-3 { grid-template-columns: repeat(3,1fr); } .grid-4 { grid-template-columns: repeat(2,1fr); } }
@media (min-width: 1080px){ .grid-4 { grid-template-columns: repeat(4,1fr); } }

.card {
    background: linear-gradient(180deg, var(--surface), var(--bg-2));
    border: 1px solid var(--line); border-radius: var(--radius-lg);
    padding: 1.9rem 1.7rem; transition: border-color var(--t), transform var(--t);
}
.card:hover { border-color: var(--line-2); transform: translateY(-3px); }
.card h3 { font-size: 1.5rem; margin-bottom: .5rem; }
.card p { color: var(--text-2); margin: 0; }
.card .ic { width: 46px; height: 46px; color: var(--brass); margin-bottom: 1.1rem; }
.card .ic svg { width: 100%; height: 100%; }
.card .kicker { font-size: .74rem; letter-spacing:.16em; text-transform:uppercase; color: var(--muted); }
.card .card-link { display:inline-flex; align-items:center; gap:.4rem; margin-top: 1.1rem; color: var(--brass-2); font-size: .9rem; font-weight: 500; }
.card-num { font-family: var(--serif); font-size: 1.1rem; color: var(--brass); border:1px solid var(--brass-d); width:2.4rem; height:2.4rem; border-radius:50%; display:flex; align-items:center; justify-content:center; margin-bottom:1rem; }

/* media object rows (alternating) */
.split { display:grid; gap: var(--s6); align-items:center; }
@media (min-width: 880px){ .split { grid-template-columns: 1fr 1fr; gap: var(--s8); } .split.reverse .split-media { order: 2; } }
.split-media { border-radius: var(--radius-lg); border:1px solid var(--line); min-height: 320px; background:
    radial-gradient(120% 120% at 0% 0%, rgba(201,164,94,.16), transparent 55%),
    linear-gradient(160deg, var(--surface-2), var(--bg)); position: relative; overflow:hidden; }
.split-media::after { content: attr(data-label); position:absolute; left:1.1rem; bottom:1rem; font-size:.74rem; letter-spacing:.14em; text-transform:uppercase; color: var(--muted); }
.split-media .ph-icon { position:absolute; inset:0; display:flex; align-items:center; justify-content:center; color: rgba(201,164,94,.5); }
.split-media .ph-icon svg { width: 84px; height: 84px; }

/* ---------- Stat band ---------- */
.band { background: var(--bg-2); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.band .grid { gap: 1rem; }
.metric strong { display:block; font-family: var(--serif); font-size: clamp(2.4rem,5vw,3.4rem); color: var(--brass-2); line-height:1; }
.metric span { color: var(--muted); font-size:.86rem; letter-spacing:.06em; }

/* ---------- Process ---------- */
.steps { counter-reset: step; display:grid; gap: 1.25rem; }
@media (min-width: 880px){ .steps { grid-template-columns: repeat(4,1fr); } }
.step { border-top: 2px solid var(--line-2); padding-top: 1.1rem; }
.step .step-no { font-family: var(--serif); font-size: 1.2rem; color: var(--brass); }
.step h3 { font-size: 1.35rem; margin:.3rem 0 .4rem; }
.step p { color: var(--text-2); font-size: .95rem; margin:0; }

/* ---------- Projects ---------- */
.project { display:block; border-radius: var(--radius-lg); overflow:hidden; border:1px solid var(--line); background: var(--surface); transition: border-color var(--t), transform var(--t); }
.project:hover { border-color: var(--brass-d); transform: translateY(-3px); }
.project .thumb { aspect-ratio: 4/3; position:relative; background:
    radial-gradient(120% 120% at 80% 0%, rgba(201,164,94,.2), transparent 60%),
    linear-gradient(160deg, var(--surface-2), #0c0e12); display:flex; align-items:center; justify-content:center; color: rgba(201,164,94,.45); }
.project .thumb svg { width: 64px; height: 64px; }
.project .pbody { padding: 1.3rem 1.4rem; }
.project .ptag { font-size:.72rem; letter-spacing:.14em; text-transform:uppercase; color: var(--brass); }
.project h3 { font-size: 1.45rem; margin:.3rem 0 .3rem; }
.project p { color: var(--text-2); font-size:.92rem; margin:0; }

/* ---------- Who we serve / list ---------- */
.ticklist { list-style:none; padding:0; margin:0; display:grid; gap:.9rem; }
.ticklist li { display:flex; gap:.8rem; align-items:flex-start; color: var(--text-2); }
.ticklist li::before { content:""; flex-shrink:0; width:8px; height:8px; margin-top:.55rem; background: var(--brass); transform: rotate(45deg); }

/* ---------- CTA band ---------- */
.cta { position:relative; overflow:hidden; text-align:center; padding: var(--s9) 0; border-top:1px solid var(--line); }
.cta::before { content:""; position:absolute; inset:0; background: radial-gradient(60% 120% at 50% 0%, rgba(201,164,94,.18), transparent 70%); pointer-events:none; }
.cta .container { position:relative; }
.cta h2 { font-size: clamp(2rem, 5vw, 3.2rem); }
.cta p { color: var(--text-2); max-width: 560px; margin: 0 auto 2rem; }

/* ---------- Contact ---------- */
.contact-grid { display:grid; gap: var(--s7); }
@media (min-width: 880px){ .contact-grid { grid-template-columns: 1.1fr .9fr; gap: var(--s8); } }
.field { display:block; margin-bottom: 1.1rem; }
.field label { display:block; font-size:.82rem; letter-spacing:.06em; color: var(--text-2); margin-bottom:.4rem; }
.field input, .field select, .field textarea {
    width:100%; background: var(--bg-2); border:1px solid var(--line-2); color: var(--text);
    border-radius: var(--radius); padding:.85rem 1rem; font: inherit; transition: border-color var(--t);
}
.field input:focus, .field select:focus, .field textarea:focus { outline:none; border-color: var(--brass); }
.field textarea { min-height: 140px; resize: vertical; }
.hp { position:absolute; left:-9999px; }
.contact-aside dt { font-size:.74rem; letter-spacing:.14em; text-transform:uppercase; color: var(--muted); margin-bottom:.2rem; }
.contact-aside dd { margin:0 0 1.4rem; font-size:1.05rem; }
.notice { border:1px solid var(--brass-d); background: rgba(201,164,94,.08); border-radius: var(--radius-lg); padding:1.1rem 1.3rem; margin-bottom:1.5rem; color: var(--brass-2); }
.notice.error { border-color:#9a4b4b; background: rgba(154,75,75,.12); color:#e7b3b3; }

/* ---------- Footer ---------- */
.site-footer { border-top:1px solid var(--line); background: var(--bg-2); padding: var(--s8) 0 var(--s5); margin-top: var(--s8); }
.footer-grid { display:grid; gap: var(--s6); grid-template-columns: 1fr; }
@media (min-width: 760px){ .footer-grid { grid-template-columns: 2fr 1fr 1fr; gap: var(--s7); } }
.footer-brand .brand { margin-bottom: 1rem; }
.footer-brand p { max-width: 36ch; font-size:.95rem; }
.cred-line { font-size:.82rem; letter-spacing:.04em; color: var(--text-2); }
.footer-col h4 { font-family: var(--sans); font-size:.76rem; letter-spacing:.16em; text-transform:uppercase; color: var(--muted); margin-bottom:1rem; }
.footer-col a, .footer-col span { display:block; color: var(--text-2); padding:.32rem 0; font-size:.95rem; transition: color var(--t); }
.footer-col a:hover { color: var(--brass-2); }
.footer-base { display:flex; flex-wrap:wrap; gap:.5rem 1.5rem; justify-content:space-between; align-items:center; border-top:1px solid var(--line); margin-top: var(--s6); padding-top: 1.4rem; font-size:.84rem; color: var(--muted); }

/* ---------- Reveal-on-scroll ---------- */
[data-reveal] { opacity:0; transform: translateY(18px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
[data-reveal].in { opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce){ [data-reveal]{ opacity:1; transform:none; } html{ scroll-behavior:auto; } }

/* ---------- Project case-study extras ---------- */
.proj-systems { display:flex; flex-wrap:wrap; gap:6px; margin:.9rem 0; }
.proj-systems span { font-size:.7rem; letter-spacing:.03em; color:var(--text-2); border:1px solid var(--line-2); border-radius:999px; padding:3px 9px; }
.proj-result { display:flex; gap:.5rem; align-items:flex-start; color:var(--brass-2); font-size:.85rem; }
.proj-result svg { width:15px; height:15px; flex-shrink:0; margin-top:3px; }

/* ---------- Testimonials ---------- */
.quotes { display:grid; gap:1.25rem; grid-template-columns:1fr; }
@media (min-width:880px){ .quotes-3 { grid-template-columns:repeat(3,1fr); } }
.quote { background:linear-gradient(180deg,var(--surface),var(--bg-2)); border:1px solid var(--line); border-radius:var(--radius-lg); padding:1.8rem 1.7rem; position:relative; }
.quote blockquote { margin:0 0 1rem; font-family:var(--serif); font-size:1.3rem; line-height:1.35; color:var(--text); }
.quote .who { color:var(--muted); font-size:.85rem; }
.quote .sample-tag { position:absolute; top:1.1rem; right:1.1rem; font-size:.6rem; letter-spacing:.14em; text-transform:uppercase; color:var(--muted); border:1px dashed var(--line-2); border-radius:999px; padding:2px 8px; }

/* ---------- Sectors strip ---------- */
.sectors { display:grid; gap:1px; background:var(--line); border:1px solid var(--line); border-radius:var(--radius-lg); overflow:hidden; grid-template-columns:repeat(2,1fr); }
@media (min-width:760px){ .sectors { grid-template-columns:repeat(4,1fr); } }
.sectors > div { background:var(--bg-2); padding:1.5rem 1.3rem; }
.sectors h4 { font-family:var(--serif); font-size:1.2rem; margin:0 0 .2rem; color:var(--text); font-weight:500; }
.sectors p { margin:0; color:var(--muted); font-size:.85rem; }

/* ---------- Utilities ---------- */
.stack > * + * { margin-top: 1rem; }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.divider { height:1px; background: var(--line); border:0; margin: var(--s7) 0; }