/* =========================================================
   MCPS — Minhas Collaborative Petroleum Solutions
   Design tokens: deep navy + steel blue (from brand brochure),
   one warm brass accent for calls to action, and a recurring
   "stratigraphy column" motif (layered rock bands) as the
   signature device — a direct nod to subsurface reservoir work.
   ========================================================= */

:root{
  /* --- Color --- */
  --navy-950:#0a2036;
  --navy-800:#0f3358;
  --navy-700:#154373;
  --blue-600:#1e6fa8;
  --sky-400:#6bb6e8;
  --sky-200:#d7ecfb;
  --brass-500:#c68a2e;
  --brass-600:#a86f1f;
  --ink:#152029;
  --ink-soft:#4a5a68;
  --paper:#fbfcfd;
  --paper-dim:#f0f4f8;
  --line:#dbe4ec;
  --white:#ffffff;

  /* Stratigraphy band palette (dark to light — used for the signature motif) */
  --strata-1:#0a2036;
  --strata-2:#123a5f;
  --strata-3:#1e6fa8;
  --strata-4:#4d9bcb;
  --strata-5:#8fc4e8;

  /* --- Type --- */
  --font-display:'Space Grotesk', 'Arial Narrow', sans-serif;
  --font-body:'Inter', -apple-system, sans-serif;
  --font-mono:'IBM Plex Mono', 'Courier New', monospace;

  /* --- Layout --- */
  --maxw:1180px;
  --radius:6px;
  --shadow-card:0 2px 4px rgba(10,32,54,0.06), 0 10px 24px rgba(10,32,54,0.06);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{
  font-family:var(--font-display);
  color:var(--navy-950);
  line-height:1.15;
  margin:0 0 .5em;
  letter-spacing:-0.01em;
}
h1{font-size:clamp(2.2rem,4.5vw,3.4rem);}
h2{font-size:clamp(1.6rem,3vw,2.3rem);}
h3{font-size:1.25rem;}
p{margin:0 0 1em;color:var(--ink-soft);}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;}

/* Visible keyboard focus (accessibility floor) */
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
  outline:3px solid var(--sky-400);
  outline-offset:2px;
}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.001ms !important;animation-iteration-count:1 !important;transition-duration:0.001ms !important;scroll-behavior:auto !important;}
}

/* --- Signature device: stratigraphy band --- */
.strata-rule{
  height:6px;
  width:64px;
  border-radius:3px;
  background:linear-gradient(90deg,var(--strata-1) 0 20%,var(--strata-2) 20% 40%,var(--strata-3) 40% 60%,var(--strata-4) 60% 80%,var(--strata-5) 80% 100%);
  margin:14px 0 18px;
}
.strata-rule.center{margin-left:auto;margin-right:auto;}

.eyebrow{
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--blue-600);
}

/* =========================
   Header / Nav
   ========================= */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(251,252,253,0.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 24px;
  max-width:var(--maxw);margin:0 auto;
}
.nav__logo img{height:62px;width:auto;}
.nav__links{display:flex;gap:28px;align-items:center;}
.nav__links a{
  font-size:.95rem;font-weight:500;color:var(--navy-800);
  position:relative;padding:6px 0;
}
.nav__links a::after{
  content:"";position:absolute;left:0;bottom:0;height:3px;width:0;
  background:linear-gradient(90deg,var(--strata-2),var(--strata-4));
  transition:width .2s ease;
}
.nav__links a:hover::after,.nav__links a.active::after{width:100%;}
.nav__cta{
  background:var(--brass-500);color:var(--white)!important;
  padding:16px 48px;border-radius:var(--radius);font-weight:600;
  white-space:nowrap;
}
.nav__cta:hover{background:var(--brass-600);}
.nav__links a.nav__cta::after{display:none;}
.nav__toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;}
.nav__toggle span{display:block;width:24px;height:2px;background:var(--navy-950);margin:5px 0;}

@media (max-width:860px){
  .nav__links{
    position:fixed;inset:64px 0 auto 0;background:var(--white);
    flex-direction:column;align-items:flex-start;padding:20px 24px 28px;
    box-shadow:var(--shadow-card);
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:transform .2s ease,opacity .2s ease;
  }
  .nav__links.open{transform:translateY(0);opacity:1;pointer-events:auto;}
  .nav__toggle{display:block;}
}

/* =========================
   Hero
   ========================= */
.hero{
  position:relative;overflow:hidden;
  background:linear-gradient(160deg,var(--navy-950) 0%,var(--navy-800) 55%,var(--blue-600) 100%);
  color:var(--white);
  padding:96px 0 110px;
}
.hero::after{
  /* subsurface contour-line texture */
  content:"";position:absolute;inset:0;
  background-image:
    repeating-linear-gradient(115deg, rgba(255,255,255,0.05) 0 2px, transparent 2px 46px);
  pointer-events:none;
}
.hero__grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;
}
.hero__eyebrow{color:var(--sky-400);}
.hero h1{color:var(--white);margin-bottom:.4em;}
.hero p.lead{color:#cfe3f2;font-size:1.1rem;max-width:46ch;}
.hero__ctas{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap;}

.btn{
  display:inline-block;padding:13px 24px;border-radius:var(--radius);
  font-weight:600;font-size:.95rem;border:2px solid transparent;cursor:pointer;
  transition:transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn:hover{transform:translateY(-1px);}
.btn--brass{background:var(--brass-500);color:var(--white);}
.btn--brass:hover{background:var(--brass-600);}
.btn--outline{border-color:rgba(255,255,255,0.55);color:var(--white);}
.btn--outline:hover{border-color:var(--white);background:rgba(255,255,255,0.08);}
.btn--navy{background:var(--navy-950);color:var(--white);}
.btn--navy:hover{background:var(--navy-800);}
.btn--sm{padding:9px 16px;font-size:.85rem;}

/* stratigraphy column illustration in hero */
.cycle-panel{
  position:relative;
}
.cycle-svg{display:block;width:100%;height:auto;}
.strata-caption{
  font-family:var(--font-body);font-size:.9rem;color:#b9cede;
  text-align:center;margin-top:14px;font-style:italic;
}

/* =========================
   Sections
   ========================= */
section{padding:80px 0;}
.section-head{max-width:640px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}

.bg-dim{background:var(--paper-dim);}
.bg-navy{background:var(--navy-950);color:var(--white);}
.bg-navy h2,.bg-navy h3{color:var(--white);}
.bg-navy p{color:#c7d7e4;}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
@media (max-width:900px){
  .grid-3,.grid-4{grid-template-columns:1fr 1fr;}
  .grid-2{grid-template-columns:1fr;}
  .hero__grid{grid-template-columns:1fr;}
}
@media (max-width:600px){
  .grid-3,.grid-4{grid-template-columns:1fr;}
}

.card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow-card);
  transition:transform .18s ease, box-shadow .18s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:0 6px 10px rgba(10,32,54,0.08),0 16px 32px rgba(10,32,54,0.1);}

.stat-strip{
  display:flex;flex-wrap:wrap;gap:0;
  border-top:1px solid rgba(255,255,255,0.15);
  margin-top:56px;padding-top:28px;
}
.stat{flex:1;min-width:160px;}
.stat .num{font-family:var(--font-mono);font-size:2rem;color:var(--sky-400);}
.stat .label{font-size:.85rem;color:#b9cede;}

/* Service checklist */
.check-list li{
  display:flex;gap:12px;align-items:flex-start;padding:10px 0;
  border-bottom:1px dashed var(--line);
}
.check-list li:last-child{border-bottom:none;}
.check-list .tick{
  flex:none;width:22px;height:22px;border-radius:50%;
  background:var(--sky-200);color:var(--blue-600);
  display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700;
}

/* Experience / affiliation badges (text-only, not reproducing third-party marks) */
.badge-row{display:flex;flex-wrap:wrap;gap:12px;}
.badge{
  font-family:var(--font-mono);font-size:.85rem;
  border:1px solid var(--line);border-radius:999px;padding:8px 16px;color:var(--navy-800);
  background:var(--white);
}
.badge--logo{
  padding:10px 20px;display:inline-flex;align-items:center;justify-content:center;
  min-width:120px;min-height:44px;
}
.badge--logo img{max-height:32px;max-width:140px;width:auto;object-fit:contain;}

/* Team / people */
.person-card{text-align:center;}
.person-photo{
  width:120px;height:120px;border-radius:50%;margin:0 auto 16px;
  background:linear-gradient(135deg,var(--sky-200),var(--sky-400));
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-size:1.6rem;color:var(--navy-950);
  border:3px solid var(--white);box-shadow:var(--shadow-card);
}
.quote-block{
  border-left:4px solid var(--brass-500);
  padding:6px 0 6px 22px;font-style:italic;color:var(--navy-800);font-size:1.15rem;
}

/* Blog / vlog / project cards */
.thumb{
  aspect-ratio:16/10;border-radius:var(--radius) var(--radius) 0 0;
  background:linear-gradient(135deg,var(--navy-800),var(--blue-600));
  display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;
}
.thumb .tag{
  position:absolute;top:10px;left:10px;background:rgba(10,32,54,0.75);color:#fff;
  font-family:var(--font-mono);font-size:.65rem;letter-spacing:.06em;text-transform:uppercase;
  padding:4px 9px;border-radius:4px;
}
.thumb .play{
  width:52px;height:52px;border-radius:50%;background:rgba(255,255,255,0.9);
  display:flex;align-items:center;justify-content:center;
}
.thumb .play::after{content:"";border-left:14px solid var(--navy-950);border-top:9px solid transparent;border-bottom:9px solid transparent;margin-left:4px;}
.media-card{padding:0;overflow:hidden;}
.media-card .body{padding:22px;}
.media-card .meta{font-family:var(--font-mono);font-size:.75rem;color:var(--blue-600);margin-bottom:8px;}
.vlog-card,.blog-card{display:block;color:inherit;text-decoration:none;cursor:pointer;}

/* Courses / e-commerce */
.price-tag{
  font-family:var(--font-mono);font-size:1.5rem;color:var(--navy-950);font-weight:700;
}
.course-card{display:flex;flex-direction:column;height:100%;}
.course-card .body{flex:1;}
.level-pill{
  display:inline-block;font-family:var(--font-mono);font-size:.7rem;text-transform:uppercase;
  background:var(--sky-200);color:var(--navy-800);padding:3px 10px;border-radius:999px;margin-bottom:10px;
}
.cart-bar{
  position:fixed;bottom:0;left:0;right:0;background:var(--navy-950);color:#fff;
  padding:14px 24px;display:none;align-items:center;justify-content:space-between;z-index:60;
  box-shadow:0 -6px 24px rgba(0,0,0,0.25);
}
.cart-bar.show{display:flex;flex-wrap:wrap;gap:10px;}
.cart-bar__info{font-family:var(--font-mono);font-size:.9rem;}

/* Forms */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.form-grid .full{grid-column:1/-1;}
@media (max-width:700px){.form-grid{grid-template-columns:1fr;}}
label{display:block;font-size:.85rem;font-weight:600;color:var(--navy-800);margin-bottom:6px;}
input,textarea,select{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius);
  font-family:var(--font-body);font-size:.95rem;background:var(--white);color:var(--ink);
}
textarea{resize:vertical;min-height:120px;}
.form-note{font-size:.85rem;color:var(--ink-soft);margin-top:10px;}
.form-success{
  display:none;background:#eaf6ee;border:1px solid #b7e0c3;color:#1e5c31;
  padding:16px;border-radius:var(--radius);margin-top:18px;
}
.form-success.show{display:block;}

/* Footer */
.site-footer{background:var(--navy-950);color:#b9cede;padding:56px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:32px;}
.footer-grid h4{color:#fff;font-size:.95rem;margin-bottom:14px;}
.footer-grid a{color:#b9cede;display:block;padding:4px 0;font-size:.9rem;}
.footer-grid a:hover{color:var(--sky-400);}
.footer-logo{height:46px;margin-bottom:16px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.12);margin-top:40px;padding-top:20px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.8rem;color:#7f95a8;
}
@media (max-width:800px){.footer-grid{grid-template-columns:1fr 1fr;}}

/* Page header (interior pages) */
.page-hero{
  background:linear-gradient(160deg,var(--navy-950),var(--navy-800));
  color:#fff;padding:64px 0 56px;
}
.page-hero h1{color:#fff;margin-bottom:8px;}
.page-hero p{color:#cfe3f2;max-width:60ch;}

/* Utility */
.mt-0{margin-top:0;}
.text-center{text-align:center;}