/* ============================================================
   ARTIFICIA — Enterprise design system (refines existing palette)
   Loaded after style.css. Additive; does not restyle the hero/carousel.
============================================================ */
:root {
  --page-bg:        #ffffff;
  --dark-bg:        #0b1524;
  --light-bg:       #ffffff;
  --muted-bg:       #f5f8fc;
  --tint-bg:        #eef3fb;
  --surface:        #ffffff;
  --surface-muted:  #f7f9fc;
  --border:         #e5e9f2;
  --border-strong:  #cdd8e8;
  --dark-border:    rgba(255,255,255,0.12);
  --text:           #0b1a33;
  --text-2:         #33465c;
  --text-muted:     #64768f;
  --on-dark:        #e7eefb;
  --on-dark-2:      #9fb2cf;
  --accent:         #2b6bff;
  --accent-ink:     #1d57e0;
  --accent-soft:    #eaf1ff;
  --success:        #0e9f6e;
  --warning:        #d9760f;
  --critical:       #e5484d;
  --content:        1180px;
  --reading:        70ch;
  --sec-y:          92px;
  --card-pad:       26px;
  --radius:         14px;
  --radius-sm:      10px;
  --shadow-1:       0 4px 18px rgba(11,26,51,0.06);
  --shadow-2:       0 14px 40px rgba(11,26,51,0.12);
  --dur:            220ms;
  --ease:           cubic-bezier(.2,.7,.2,1);
}

/* ---- layout primitives ---- */
.sec { padding: var(--sec-y) 0; position: relative; }
.sec .wrap, .wrap { max-width: var(--content); margin: 0 auto; padding: 0 24px; }
.sec--muted { background: var(--muted-bg); }
.sec--tint  { background: var(--tint-bg); }
.sec--dark  { background: var(--dark-bg); color: var(--on-dark); }
.sec--dark h2, .sec--dark h3 { color: #fff; }
.sec--grid::before {           /* very faint technical grid */
  content:""; position:absolute; inset:0; pointer-events:none; opacity:.5;
  background-image: linear-gradient(var(--border) 1px, transparent 1px),
                    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px; mask-image: radial-gradient(120% 90% at 50% 0%, #000 30%, transparent 75%);
}
.sec--dark.sec--grid::before {
  background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
}
.sec > .wrap { position: relative; }

.eyebrow { font-size:.76rem; font-weight:800; letter-spacing:.16em; text-transform:uppercase; color:#1741a8; margin-bottom:14px; }
.sec--dark .eyebrow, .proof-band .eyebrow,
.cs-hero .eyebrow, .xp-hero .eyebrow, .sol-hero .eyebrow,
.cap-hero .eyebrow, .ab-hero .eyebrow, .ct-hero .eyebrow { color:#8fb2ff; }
.sec-head { max-width: 760px; margin-bottom: 44px; }
.sec-head h2 { font-size: clamp(1.7rem,3vw,2.3rem); font-weight:800; line-height:1.12; letter-spacing:-.01em; color:var(--text); }
.sec-head p { margin-top:14px; color:var(--text-2); font-size:1.08rem; line-height:1.6; max-width: 68ch; }
.sec--dark .sec-head p { color: var(--on-dark-2); }

.chips { display:flex; flex-wrap:wrap; gap:8px; }
.chips span { font-size:.78rem; font-weight:600; color:#2d3a4a; background:var(--surface-muted); border:1px solid var(--border); border-radius:8px; padding:5px 10px; }
.sec--dark .chips span { color:var(--on-dark); background:rgba(255,255,255,.05); border-color:var(--dark-border); }

.btn-x { display:inline-flex; align-items:center; gap:8px; font-weight:700; text-decoration:none; border-radius:10px; padding:13px 22px; transition:var(--dur) var(--ease); }
.btn-fill { background:var(--accent); color:#fff; box-shadow:0 8px 22px rgba(43,107,255,.28); }
.btn-fill:hover { background:var(--accent-ink); transform:translateY(-2px); }
.btn-ghost-d { border:1px solid rgba(255,255,255,.4); color:#eaf1ff; }
.btn-ghost-d:hover { background:rgba(255,255,255,.1); }

/* ---- 5A executive proof band ---- */
.proof-band { background:var(--dark-bg); color:var(--on-dark); border-top:1px solid var(--dark-border); border-bottom:1px solid var(--dark-border); }
.proof-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:1px; background:var(--dark-border); }
.proof-grid > div { background:var(--dark-bg); padding:26px 22px; }
.proof-grid .k { display:block; font-size:.72rem; letter-spacing:.14em; text-transform:uppercase; color:#79a4ff; margin-bottom:8px; font-weight:700; }
.proof-grid .v { font-size:1.02rem; line-height:1.4; color:#eaf1ff; font-weight:600; }
@media (max-width:820px){ .proof-grid { grid-template-columns:repeat(2,1fr); } }

/* ---- 5B four practices (asymmetric) ---- */
.pr-grid { display:grid; grid-template-columns:repeat(12,1fr); gap:20px; }
.pr-grid .pr:nth-child(1){ grid-column:span 7; }
.pr-grid .pr:nth-child(2){ grid-column:span 5; }
.pr-grid .pr:nth-child(3){ grid-column:span 6; }
.pr-grid .pr:nth-child(4){ grid-column:span 6; }
.pr-grid .pr:nth-child(1) h3, .pr-grid .pr:nth-child(2) h3 { font-size:1.45rem; }
.pr { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:30px; box-shadow:var(--shadow-1); transition:var(--dur) var(--ease); position:relative; overflow:hidden; }
.pr:hover { transform:translateY(-4px); box-shadow:var(--shadow-2); border-color:var(--border-strong); }
.pr .num { font-size:.8rem; font-weight:800; color:var(--accent); letter-spacing:.1em; }
.pr h3 { font-size:1.3rem; font-weight:800; color:var(--text); margin:8px 0 14px; line-height:1.2; }
.pr .row { margin:12px 0; }
.pr .lab { font-size:.72rem; font-weight:800; letter-spacing:.08em; text-transform:uppercase; color:var(--text-muted); }
.pr .row p { color:var(--text-2); line-height:1.55; margin-top:3px; }
.pr .foot { display:flex; justify-content:space-between; align-items:flex-end; margin-top:18px; gap:14px; flex-wrap:wrap; }
.pr a.more { color:var(--accent); font-weight:700; text-decoration:none; font-size:.92rem; }
.pr--major { grid-column: span 1; }
@media (max-width:820px){ .pr-grid { grid-template-columns:1fr; } }

/* ---- case-study cards ---- */
.cs-cards { display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
@media (max-width:960px){ .cs-cards { grid-template-columns:1fr; } }
.cs-card { text-align:left; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow-1); transition:var(--dur) var(--ease); cursor:pointer; display:flex; flex-direction:column; width:100%; padding:0; font:inherit; color:inherit; }
.cs-card:hover { transform:translateY(-5px); box-shadow:var(--shadow-2); border-color:var(--border-strong); }
.cs-card:focus-visible { outline:3px solid var(--accent); outline-offset:2px; }
.cs-card .media { height:150px; border-bottom:1px solid var(--border); background:#0b1524; }
.cs-card .body { padding:22px; display:flex; flex-direction:column; gap:12px; flex:1; }
.cs-card .tagrow { display:flex; gap:8px; flex-wrap:wrap; }
.cs-card .tag { font-size:.68rem; font-weight:800; letter-spacing:.06em; text-transform:uppercase; padding:4px 9px; border-radius:6px; background:var(--accent-soft); color:var(--accent-ink); }
.cs-card .tag.ind { background:#eef3fb; color:#425774; }
.cs-card h3 { font-size:1.15rem; font-weight:800; color:var(--text); line-height:1.25; }
.cs-card .oneliner { color:var(--text-2); font-size:.95rem; line-height:1.5; }
.metricrow { display:grid; grid-template-columns:repeat(3,1fr); gap:10px; margin:6px 0 2px; }
.metric { border:1px solid var(--border); border-radius:11px; padding:14px 12px; background:var(--surface-muted); text-align:left; }
.metric .mv { font-weight:800; color:var(--text); font-size:1.7rem; line-height:1.05; letter-spacing:-.02em; }
.metric .mv .est { font-size:.55rem; font-weight:800; color:var(--accent); letter-spacing:.04em; vertical-align:super; margin-left:3px; text-transform:uppercase; }
.metric .ml { font-size:.72rem; color:var(--text-muted); margin-top:6px; line-height:1.3; }
.cs-card .cs-outcome { color:var(--text); font-weight:700; line-height:1.45; font-size:.98rem; border-left:3px solid var(--accent); padding-left:12px; }
.cs-drawer .metricrow .metric .mv { font-size:2rem; }
.est-note { margin-top:12px; font-size:.8rem; color:var(--text-muted); line-height:1.5; font-style:italic; }
.cs-card .viewlink { margin-top:auto; color:var(--accent); font-weight:800; font-size:.94rem; }
@media (max-width:420px){ .metricrow { grid-template-columns:1fr 1fr; } .metric .mv{ font-size:1.4rem; } }

/* ---- filters ---- */
.cs-filters { display:flex; flex-wrap:wrap; gap:10px; margin-bottom:30px; }
.cs-chip { border:1px solid var(--border-strong); background:#fff; color:#26374d; border-radius:999px; padding:9px 16px; font-size:.9rem; font-weight:700; cursor:pointer; transition:var(--dur) var(--ease); }
.cs-chip:hover { border-color:var(--accent); color:var(--accent); }
.cs-chip[aria-pressed="true"] { background:var(--text); color:#fff; border-color:var(--text); }

/* ---- case detail drawer ---- */
.cs-drawer-scrim { position:fixed; inset:0; background:rgba(6,12,24,.55); opacity:0; visibility:hidden; transition:opacity var(--dur) var(--ease); z-index:200; }
.cs-drawer-scrim.open { opacity:1; visibility:visible; }
.cs-drawer { position:fixed; top:0; right:0; height:100%; width:min(760px,100%); background:#fff; box-shadow:var(--shadow-2); transform:translateX(100%); transition:transform var(--dur) var(--ease); z-index:201; overflow-y:auto; }
.cs-drawer.open { transform:translateX(0); }
.cs-drawer .dh { position:sticky; top:0; background:#0b1524; color:#fff; padding:22px 26px; display:flex; justify-content:space-between; align-items:flex-start; gap:16px; z-index:2; }
.cs-drawer .dh h2 { font-size:1.35rem; color:#fff; line-height:1.2; }
.cs-drawer .dh .meta { font-size:.74rem; letter-spacing:.08em; text-transform:uppercase; color:#79a4ff; font-weight:700; margin-bottom:6px; }
.cs-drawer .dx { background:rgba(255,255,255,.1); border:none; color:#fff; width:38px; height:38px; border-radius:50%; font-size:1.3rem; cursor:pointer; flex:0 0 auto; }
.cs-drawer .dbody { padding:26px; }
.cs-drawer .outcome { font-size:1.15rem; font-weight:700; color:var(--text); line-height:1.4; margin-bottom:20px; }
.cs-block { padding:18px 0; border-top:1px solid var(--border); }
.cs-block:first-of-type { border-top:none; }
.cs-block h4 { font-size:.76rem; font-weight:800; letter-spacing:.1em; text-transform:uppercase; color:var(--text-muted); margin-bottom:8px; }
.cs-block p, .cs-block li { color:var(--text-2); line-height:1.6; }
.cs-block ul { margin:4px 0 0 18px; }
.snapshot { display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.snapshot .s { background:var(--surface-muted); border:1px solid var(--border); border-radius:10px; padding:14px; }
.snapshot .s .k { font-size:.72rem; font-weight:800; letter-spacing:.08em; text-transform:uppercase; color:var(--text-muted); }
.snapshot .s .v { color:var(--text); margin-top:4px; line-height:1.45; }
.impact-cols { display:grid; grid-template-columns:repeat(3,1fr); gap:14px; }
.impact-cols .col .k { font-weight:800; color:var(--text); font-size:.92rem; margin-bottom:6px; }
.impact-cols .col li { font-size:.9rem; }
@media (max-width:640px){ .snapshot, .impact-cols { grid-template-columns:1fr; } }

/* ---- 5D architecture diagram ---- */
.arch { display:grid; grid-template-columns:repeat(4,1fr); gap:12px; }
.arch .layer { background:rgba(255,255,255,.04); border:1px solid var(--dark-border); border-radius:12px; padding:18px; }
.arch .layer .k { font-size:.72rem; font-weight:800; letter-spacing:.06em; text-transform:uppercase; color:#79a4ff; margin-bottom:8px; }
.arch .layer .v { color:#dbe6fb; font-size:.92rem; line-height:1.4; }
.arch .out { grid-column:1 / -1; border-color:rgba(43,107,255,.5); background:rgba(43,107,255,.12); text-align:center; }
@media (max-width:820px){ .arch { grid-template-columns:repeat(2,1fr); } }

/* ---- 5E delivery model ---- */
.delivery { display:grid; grid-template-columns:repeat(3,1fr); gap:16px; counter-reset:st; }
.stage { background:var(--surface); border:1px solid var(--border); border-radius:12px; padding:22px; }
.stage .n { font-size:.85rem; font-weight:800; color:var(--accent); letter-spacing:.1em; }
.stage h3, .stage h4 { font-size:1.1rem; font-weight:800; color:var(--text); margin:6px 0 8px; }
/* a11y: footer contrast, accessible button contrast, sr-only headings */
footer, .site-footer { color:#4a5a73 !important; }
.btn-primary, .btn-fill { background:#1d57e0; }
.btn-primary:hover, .btn-fill:hover { background:#1748c4; }
.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }
.stage p { color:var(--text-2); line-height:1.5; font-size:.94rem; }
.stage .out { margin-top:10px; font-size:.82rem; color:var(--text-muted); }
.stage .out b { color:var(--text); }
@media (max-width:820px){ .delivery { grid-template-columns:1fr; } }

/* ---- aegis proof + final CTA ---- */
.aegis-proof { display:grid; grid-template-columns:1fr 1fr; gap:32px; align-items:center; }
.final-cta { text-align:center; }
.final-cta h2 { max-width:720px; margin:0 auto 14px; }
.final-cta .row { display:flex; gap:14px; justify-content:center; flex-wrap:wrap; margin-top:8px; }
@media (max-width:820px){ .aegis-proof { grid-template-columns:1fr; } }

/* ---- reveal ---- */
.rv { opacity:0; transform:translateY(20px); transition:opacity .6s var(--ease), transform .6s var(--ease); }
.rv.in { opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce){ .rv,.cs-card,.pr,.cs-drawer,.cs-drawer-scrim,.btn-x { transition:none !important; } .rv{opacity:1;transform:none;} }