/* ============================================================
   Texas Quantitative — shared site styles
   Canonical design language: CoolScreen (UniFi-inspired)
   Used by the marketing pages: work / about / approach / contact
   ============================================================ */

:root {
  --bg-base:        #080e18;
  --bg-surface:     #0d1526;
  --bg-elevated:    #111e35;
  --bg-border:      #1a2d4a;

  --accent-primary:   #00c8b4;   /* teal */
  --accent-secondary: #0096ff;   /* electric blue */
  --accent-warn:      #f5a623;   /* amber */
  --accent-danger:    #e8394d;   /* red */
  --accent-success:   #27c66f;   /* green */

  --text-primary:   #e8f0fe;
  --text-secondary: #7a9cc4;
  --text-muted:     #3d5a80;

  --glow-teal: 0 0 12px rgba(0, 200, 180, 0.4);
  --glow-blue: 0 0 12px rgba(0, 150, 255, 0.4);

  --font-mono: 'JetBrains Mono', 'Fira Code', 'Menlo', monospace;
  --font-ui:   'Inter', 'SF Pro Display', system-ui, sans-serif;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  min-height: 100%;
}

/* atmosphere + grain (matches the landing) */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(1100px 600px at 78% -8%, rgba(0,150,255,0.10), transparent 60%),
    radial-gradient(900px 520px at 10% 4%, rgba(0,200,180,0.08), transparent 60%),
    linear-gradient(180deg, transparent, rgba(8,14,24,0.4) 92%);
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
  opacity: 0.025;
}

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 28px; position: relative; z-index: 1; }
.mono { font-family: var(--font-mono); }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 60;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 28px;
  border-bottom: 1px solid var(--bg-border);
  background: linear-gradient(to bottom, rgba(8,14,24,0.96), rgba(8,14,24,0.78));
  backdrop-filter: blur(8px);
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
}
.nav .brand { color: var(--text-primary); font-weight: 600; display: flex; align-items: center; gap: 9px; text-decoration: none; }
.nav .brand b { color: var(--accent-primary); font-weight: 600; }
.nav .spark { width: 7px; height: 7px; border-radius: 50%; background: var(--accent-primary); box-shadow: var(--glow-teal); }
.nav .links { display: flex; gap: 22px; align-items: center; }
.nav .links a { color: var(--text-secondary); text-decoration: none; transition: color .25s ease; }
.nav .links a:hover { color: var(--accent-primary); }
.nav .links a.active { color: var(--accent-primary); }
.nav .links a.cta { color: var(--bg-base); background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary)); padding: 7px 14px; border-radius: var(--radius-sm); font-weight: 600; }
.nav .links a.cta:hover { color: var(--bg-base); opacity: 0.9; }

/* mobile menu toggle (hamburger) */
.nav .menu-btn { display: none; background: none; border: 0; color: var(--text-secondary); cursor: pointer; padding: 4px; }
.nav .menu-btn svg { width: 22px; height: 22px; display: block; }

/* ---------- page hero ---------- */
.hero { padding: 84px 0 40px; position: relative; }
.hero.center { text-align: center; }
.hero.center .sub { margin-left: auto; margin-right: auto; }
.eyebrow { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--accent-primary); margin-bottom: 18px; }
.hero h1 { font-weight: 500; letter-spacing: -0.015em; line-height: 1.05; font-size: clamp(2.1rem, 4.6vw, 3.6rem); max-width: 20ch; }
.hero.center h1 { max-width: 22ch; margin: 0 auto; }
.hero h1 em { font-style: normal; color: var(--accent-primary); }
.hero .sub { margin-top: 22px; max-width: 60ch; font-size: clamp(1rem, 1.4vw, 1.18rem); color: var(--text-secondary); }

/* ---------- buttons ---------- */
.btn { display: inline-block; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; text-decoration: none; padding: 13px 22px; border-radius: var(--radius-sm); border: 1px solid var(--bg-border); color: var(--text-primary); transition: all .25s ease; cursor: pointer; }
.btn:hover { border-color: var(--accent-primary); color: var(--accent-primary); }
.btn.primary { background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary)); color: var(--bg-base); border-color: transparent; font-weight: 600; }
.btn.primary:hover { opacity: 0.9; color: var(--bg-base); }

/* link with arrow */
.arrow-link { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent-primary); text-decoration: none; transition: gap .25s ease; }
.arrow-link:hover { gap: 14px; }

/* ---------- sections ---------- */
.section { padding: 64px 0; position: relative; }
.section.bordered { border-top: 1px solid var(--bg-border); }
.sec-label { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent-secondary); margin-bottom: 16px; }
.section h2 { font-weight: 500; letter-spacing: -0.01em; line-height: 1.1; font-size: clamp(1.7rem, 3.4vw, 2.6rem); max-width: 22ch; }
.section h2 em { font-style: normal; color: var(--accent-primary); }
.lede { margin-top: 18px; max-width: 60ch; color: var(--text-secondary); font-size: 1.06rem; }

/* ---------- console-style card (case studies, feature cards) ---------- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; margin-top: 40px; }
.cs-card {
  position: relative; overflow: hidden;
  background: var(--bg-surface);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.cs-card:hover { border-color: rgba(0,200,180,0.4); transform: translateY(-3px); box-shadow: 0 18px 44px rgba(0,0,0,0.4); }
.cs-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--accent-primary), transparent); opacity: 0.6; }
.cs-card.blue::before { background: linear-gradient(90deg, transparent, var(--accent-secondary), transparent); }
.cs-card .live-dot { position: absolute; top: 22px; right: 22px; width: 8px; height: 8px; border-radius: 50%; background: var(--accent-primary); box-shadow: var(--glow-teal); animation: pulse-dot 2s ease-in-out infinite; }
.cs-card.blue .live-dot { background: var(--accent-secondary); box-shadow: var(--glow-blue); }
.badge { display: inline-flex; align-items: center; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-primary); border: 1px solid rgba(0,200,180,0.3); background: rgba(0,200,180,0.06); padding: 5px 11px; border-radius: var(--radius-full); }
.cs-card.blue .badge { color: var(--accent-secondary); border-color: rgba(0,150,255,0.3); background: rgba(0,150,255,0.06); }
.cs-card h3 { font-weight: 500; font-size: 1.45rem; margin: 16px 0 12px; letter-spacing: -0.01em; }
.cs-card .desc { color: var(--text-secondary); font-size: 0.98rem; line-height: 1.55; }
.bullets { margin-top: 18px; display: flex; flex-direction: column; gap: 10px; }
.bullets .row { display: flex; align-items: flex-start; gap: 11px; }
.bullets .dot { width: 6px; height: 6px; border-radius: 50%; margin-top: 8px; flex-shrink: 0; background: var(--accent-primary); box-shadow: var(--glow-teal); }
.cs-card.blue .bullets .dot { background: var(--accent-secondary); box-shadow: var(--glow-blue); }
.bullets p { color: var(--text-secondary); font-size: 0.95rem; }

@keyframes pulse-dot { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.4; transform: scale(0.7); } }

/* ---------- feature cards (About) ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin-top: 44px; }
.feature { position: relative; overflow: hidden; background: var(--bg-surface); border: 1px solid var(--bg-border); border-radius: var(--radius-lg); padding: 32px 26px; text-align: center; transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease; }
.feature:hover { border-color: rgba(0,200,180,0.4); transform: translateY(-3px); box-shadow: 0 18px 44px rgba(0,0,0,0.4); }
.feature::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--accent-primary), transparent); opacity: .55; }
.feature .icon { width: 58px; height: 58px; margin: 0 auto 18px; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, rgba(0,200,180,0.16), rgba(0,150,255,0.16)); border: 1px solid var(--bg-border); box-shadow: inset 0 0 18px rgba(0,200,180,0.08); }
.feature .icon svg { width: 26px; height: 26px; stroke: var(--accent-primary); fill: none; }
.feature h3 { font-weight: 500; font-size: 1.2rem; margin-bottom: 10px; }
.feature p { color: var(--text-secondary); font-size: 0.96rem; }

/* ---------- numbered steps (Approach) ---------- */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; margin-top: 44px; }
.step { position: relative; overflow: hidden; background: var(--bg-surface); border: 1px solid var(--bg-border); border-radius: var(--radius-lg); padding: 28px 24px 30px; transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease; }
.step:hover { border-color: rgba(0,200,180,0.4); transform: translateY(-3px); box-shadow: 0 18px 44px rgba(0,0,0,0.4); }
.step::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--accent-primary), transparent); opacity: .55; }
.step .num { font-family: var(--font-mono); font-size: 2.5rem; font-weight: 600; line-height: 1; color: var(--accent-primary); }
.step h3 { font-weight: 500; font-size: 1.2rem; margin: 14px 0 10px; }
.step p { color: var(--text-secondary); font-size: 0.95rem; }
.steps .step:nth-child(2) .num { color: var(--accent-secondary); }
.steps .step:nth-child(3) .num { color: var(--accent-warn); }
.steps .step:nth-child(4) .num { color: var(--accent-success); }
.steps .step:nth-child(2)::before { background: linear-gradient(90deg, transparent, var(--accent-secondary), transparent); }
.steps .step:nth-child(3)::before { background: linear-gradient(90deg, transparent, var(--accent-warn), transparent); }
.steps .step:nth-child(4)::before { background: linear-gradient(90deg, transparent, var(--accent-success), transparent); }

/* ---------- contact (info + form) ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; margin-top: 44px; }
.expect h3 { font-weight: 500; font-size: 1.25rem; margin-bottom: 22px; }
.steplist { display: flex; flex-direction: column; gap: 20px; }
.steplist .item { display: flex; align-items: flex-start; gap: 14px; }
.steplist .n { width: 34px; height: 34px; flex-shrink: 0; border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-family: var(--font-mono); font-size: 13px; font-weight: 600; color: var(--accent-primary); background: rgba(0,200,180,0.08); border: 1px solid rgba(0,200,180,0.25); }
.steplist .item:nth-child(2) .n { color: var(--accent-secondary); background: rgba(0,150,255,0.08); border-color: rgba(0,150,255,0.25); }
.steplist .item:nth-child(3) .n { color: var(--accent-warn); background: rgba(245,166,35,0.08); border-color: rgba(245,166,35,0.25); }
.steplist h4 { font-weight: 500; font-size: 1.02rem; margin-bottom: 4px; }
.steplist p { color: var(--text-secondary); font-size: 0.92rem; }

.form-card { position: relative; overflow: hidden; background: var(--bg-surface); border: 1px solid var(--bg-border); border-radius: var(--radius-lg); padding: 32px 28px; }
.form-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--accent-primary), transparent); opacity: .6; }
.form-card form { display: flex; flex-direction: column; gap: 14px; }
.form-card input, .form-card textarea { width: 100%; background: var(--bg-base); border: 1px solid var(--bg-border); border-radius: var(--radius-md); padding: 13px 15px; color: var(--text-primary); font-family: var(--font-ui); font-size: 0.98rem; transition: border-color .2s ease, box-shadow .2s ease; }
.form-card input::placeholder, .form-card textarea::placeholder { color: var(--text-muted); }
.form-card input:focus, .form-card textarea:focus { outline: none; border-color: var(--accent-primary); box-shadow: 0 0 0 3px rgba(0,200,180,0.12); }
.form-card textarea { min-height: 132px; resize: vertical; }
.form-card .btn { width: 100%; text-align: center; margin-top: 4px; }
.btn:disabled { opacity: .5; cursor: default; }
.btn:disabled:hover { border-color: transparent; color: var(--bg-base); }
.form-status { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em; text-align: center; color: var(--text-secondary); margin-top: 6px; min-height: 1.2em; }
.form-status.ok { color: var(--accent-success); }
.form-status.err { color: var(--accent-danger); }
@media (max-width: 760px) { .contact-grid { grid-template-columns: 1fr; gap: 30px; } }

/* ---------- CTA strip ---------- */
.cta-strip {
  margin-top: 56px; display: inline-flex; align-items: center; gap: 18px; flex-wrap: wrap;
  background: var(--bg-surface); border: 1px solid var(--bg-border); border-radius: var(--radius-full);
  padding: 14px 24px;
}
.cta-strip span { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; color: var(--text-secondary); }
.cta-center { text-align: center; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--bg-border); margin-top: 40px; padding: 40px 0 48px; position: relative; z-index: 1; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 22px 28px; align-items: center; justify-content: space-between; }
.site-footer .left { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 22px; }
.site-footer .copy { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); }
.site-footer .copy b { color: var(--accent-primary); font-weight: 500; }
.foot-links { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
.foot-links a { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-secondary); text-decoration: none; transition: color .25s ease; display: inline-flex; align-items: center; gap: 6px; }
.foot-links a:hover { color: var(--accent-primary); }
.foot-links svg { width: 14px; height: 14px; fill: currentColor; }
.site-footer .meta { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; color: var(--text-muted); display: flex; align-items: center; gap: 10px; }

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .nav .links { gap: 16px; }
  .nav .links a.navlink { display: none; }
  .nav.open .links { position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: flex-start; gap: 4px; padding: 14px 28px; background: var(--bg-surface); border-bottom: 1px solid var(--bg-border); }
  .nav.open .links a.navlink { display: block; padding: 8px 0; }
  .nav .menu-btn { display: inline-flex; }
  .site-footer .wrap { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  html { scroll-behavior: auto; }
}