/* ===================================================================
   Parallel Tensors - Design System
   Light, minimalist, high-contrast aesthetic
   Edit the tokens in :root to re-theme the whole site.
   =================================================================== */

:root {
  /* --- Colors --- */
  --bg:            #ffffff;   /* page background */
  --bg-soft:       #f7f8fa;   /* raised surfaces */
  --bg-card:       #ffffff;   /* cards */
  --bg-card-hover: #f5f7fa;
  --border:        #e5e8ef;
  --border-soft:   #eef1f5;

  --text:          #0f1623;   /* primary text */
  --text-muted:    #5a6477;   /* secondary text */
  --text-dim:      #8b94a6;   /* tertiary / labels */

  --accent:        #2563eb;   /* blue */
  --accent-2:      #3b82f6;   /* lighter blue */
  --accent-soft:   rgba(37, 99, 235, 0.08);
  --accent-glow:   rgba(37, 99, 235, 0.18);

  --gradient: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  --gradient-text: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);

  /* --- Typography --- */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               Helvetica, Arial, sans-serif;

  /* --- Layout --- */
  --maxw: 1180px;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 22px;

  /* --- Motion --- */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* ambient background glow */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60rem 40rem at 75% -10%, rgba(37, 99, 235, 0.04), transparent 60%),
    radial-gradient(50rem 40rem at 10% 0%, rgba(37, 99, 235, 0.05), transparent 55%),
    radial-gradient(circle, rgba(37, 99, 235, 0.13) 1px, transparent 1.4px);
  background-size: auto, auto, 24px 24px;
  background-color: #fbfbfd;
  pointer-events: none;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

h1, h2, h3, h4 { line-height: 1.12; font-weight: 700; letter-spacing: -0.02em; }

/* ===================== Layout ===================== */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 24px;
}

section { padding-block: clamp(64px, 9vw, 120px); }

.section-head { max-width: 680px; margin-bottom: 56px; }
.section-head.center { margin-inline: auto; text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: var(--accent-2);
  opacity: 0.7;
}
.section-head.center .eyebrow { justify-content: center; }
.section-head.center .eyebrow::before { display: none; }

h2.title { font-size: clamp(30px, 4.5vw, 48px); }
.lead { color: var(--text-muted); font-size: clamp(16px, 1.6vw, 19px); margin-top: 18px; }

.italic-accent { font-style: italic; font-weight: 400; }
.grad-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ===================== Buttons ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 15px;
  font-weight: 600;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
              background 0.25s var(--ease), border-color 0.25s var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 20px -10px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-2px); background: #1d4ed8; box-shadow: 0 10px 28px -12px var(--accent-glow); }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--accent); background: var(--accent-soft); }

.btn .arrow { transition: transform 0.25s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

/* ===================== Header / Nav ===================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.78);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.site-header.scrolled { border-bottom-color: var(--border-soft); }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
}
.brand .logo {
  width: 30px; height: 30px;
  border-radius: 8px;
  background: var(--gradient);
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  font-size: 15px;
  box-shadow: 0 4px 16px -4px var(--accent-glow);
}
/* Wordmark image (pre-trimmed asset) */
.brand-logo {
  height: 32px;
  width: auto;
  display: block;
}

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  position: relative;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 8px;
  transition: color 0.25s var(--ease);
}
/* sleek gradient underline that wipes in from the left */
.nav-links a::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.32s var(--ease);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-links a.active { color: var(--accent); font-weight: 600; }
.nav-links a.active::after { transform: scaleX(1); }

.nav-cta { display: flex; align-items: center; gap: 14px; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 9px;
  width: 42px; height: 42px;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  display: block;
  width: 18px; height: 2px;
  background: var(--text);
  margin: 4px auto;
  transition: transform 0.3s var(--ease), opacity 0.3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ===================== Hero ===================== */
.hero { padding-top: clamp(60px, 9vw, 110px); padding-bottom: clamp(60px, 9vw, 110px); }
.hero-inner { max-width: 860px; }
.hero h1 {
  font-size: clamp(40px, 7vw, 76px);
  letter-spacing: -0.035em;
}
.hero .lead { max-width: 600px; font-size: clamp(17px, 1.8vw, 21px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 44px;
  color: var(--text-dim);
  font-size: 14px;
}
.hero-badges span { display: inline-flex; align-items: center; gap: 8px; }
.hero-badges .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2); }

/* ===================== Cards / Grids ===================== */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease),
              background 0.3s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  background: var(--bg-card-hover);
}
.card .icon {
  width: 46px; height: 46px;
  border-radius: 11px;
  background: var(--accent-soft);
  border: 1px solid var(--border);
  display: grid; place-items: center;
  margin-bottom: 20px;
  font-size: 22px;
}
.card h3 { font-size: 20px; margin-bottom: 10px; }
.card p { color: var(--text-muted); font-size: 15.5px; }

.num {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-2);
  letter-spacing: 0.05em;
  margin-bottom: 14px;
}

/* feature list */
.tick-list { display: grid; gap: 12px; margin-top: 18px; }
.tick-list li {
  display: flex; gap: 11px;
  color: var(--text-muted);
  font-size: 15.5px;
}
.tick-list li::before {
  content: "";
  flex: none;
  width: 20px; height: 20px;
  margin-top: 3px;
  border-radius: 6px;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2360a5fa' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

/* ===================== Stats ===================== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-soft);
  padding: 40px;
}
.stat .big {
  font-size: clamp(32px, 4vw, 46px);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--gradient-text);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat .label { color: var(--text-muted); font-size: 14.5px; margin-top: 4px; }

/* ===================== Logos / social proof ===================== */
.logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 18px 44px;
  opacity: 0.65;
}
.logos span {
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--text-muted);
  filter: grayscale(1);
}

/* ===================== Process ===================== */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.step { position: relative; padding-top: 28px; }
.step::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: var(--border);
}
.step.active::before { background: var(--gradient); }
.step .step-num { font-size: 13px; color: var(--accent-2); font-weight: 700; margin-bottom: 8px; }
.step h3 { font-size: 18px; margin-bottom: 8px; }
.step p { color: var(--text-muted); font-size: 15px; }

/* ===================== Case study cards ===================== */
.case-card {
  position: relative;
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease),
              box-shadow 0.35s var(--ease);
}
/* gradient accent bar that wipes in on hover */
.case-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}
.case-card:hover {
  transform: translateY(-6px);
  border-color: transparent;
  box-shadow: 0 22px 44px -26px var(--accent-glow), 0 8px 22px -14px rgba(15, 22, 35, 0.12);
}
.case-card:hover::before { transform: scaleX(1); }

.case-card .body { padding: 30px; }
.case-card .meta {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--accent);
  font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  margin-bottom: 14px;
}
.case-card h3 { font-size: 21px; margin-bottom: 10px; letter-spacing: -0.02em; }
.case-card p { color: var(--text-muted); font-size: 15px; }
.case-card .result {
  margin-top: 20px;
  padding: 13px 16px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  font-size: 14px;
  color: var(--text);
}
.case-card .result b { color: var(--accent); }

/* ===================== Testimonials ===================== */
.quote {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.quote p { font-size: 17px; color: var(--text); }
.quote .author { display: flex; align-items: center; gap: 12px; margin-top: 22px; }
.quote .avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--gradient); flex: none;
  display: grid; place-items: center; color: #fff; font-weight: 700;
}
.quote .author .name { font-weight: 600; font-size: 15px; }
.quote .author .role { color: var(--text-dim); font-size: 13.5px; }

/* ===================== CTA band ===================== */
.cta-band {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(40rem 20rem at 80% 0%, rgba(37,99,235,0.06), transparent 60%),
    var(--bg-soft);
  padding: clamp(40px, 6vw, 72px);
  text-align: center;
  overflow: hidden;
}
.cta-band h2 { font-size: clamp(28px, 4vw, 44px); }
.cta-band p { color: var(--text-muted); max-width: 540px; margin: 16px auto 0; }
.cta-band .hero-actions { justify-content: center; }

/* ===================== Forms ===================== */
.form { display: grid; gap: 18px; }
.field { display: grid; gap: 8px; }
.field label { font-size: 14px; font-weight: 600; color: var(--text-muted); }
.field input, .field select, .field textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 13px 15px;
  font-family: inherit;
  font-size: 15px;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.field textarea { resize: vertical; min-height: 130px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-note { font-size: 13.5px; color: var(--text-dim); }
.form-success {
  display: none;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 16px;
  color: var(--text);
  font-size: 15px;
}

/* ===================== Calendar embed ===================== */
.calendar-embed { position: relative; }
.calendar-embed iframe { display: block; background: var(--bg); }
.calendar-fallback {
  text-align: center;
  padding: 44px 22px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
}
/* When a real calendar link is set, JS adds .live and we hide the fallback */
.calendar-embed.live .calendar-fallback { display: none; }
.calendar-embed:not(.live) iframe { display: none; }

/* ===================== Page hero (inner pages) ===================== */
.page-hero { padding-top: clamp(56px, 8vw, 96px); padding-bottom: clamp(40px, 5vw, 64px); }
.page-hero h1 { font-size: clamp(34px, 6vw, 60px); }
.page-hero .lead { max-width: 640px; }

/* ===================== Split (image + text) ===================== */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
.media-block {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(30rem 20rem at 30% 20%, rgba(59,130,246,0.18), transparent 60%),
    var(--bg-soft);
  aspect-ratio: 4 / 3;
  display: grid; place-items: center;
  font-size: 56px;
  position: relative;
  overflow: hidden;
}
.media-block .badge-float {
  position: absolute;
  bottom: 22px; left: 22px; right: 22px;
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 14px;
  color: var(--text-muted);
  text-align: left;
}

/* ===================== Footer ===================== */
.site-footer {
  border-top: 1px solid var(--border-soft);
  padding-block: 64px 36px;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand p { color: var(--text-muted); font-size: 15px; margin-top: 16px; max-width: 280px; }
.footer-col h4 { font-size: 14px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-dim); margin-bottom: 16px; }
.footer-col a { display: block; color: var(--text-muted); font-size: 15px; padding: 5px 0; transition: color 0.2s; }
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  display: flex; flex-wrap: wrap; gap: 14px;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
  border-top: 1px solid var(--border-soft);
  color: var(--text-dim);
  font-size: 14px;
}
.footer-bottom .socials { display: flex; gap: 16px; }
.footer-bottom .socials a:hover { color: var(--text); }

/* ===================== Reveal on scroll ===================== */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ===================== Responsive ===================== */
@media (max-width: 940px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 760px) {
  .nav-links, .nav-cta .btn-ghost { display: none; }
  .nav-toggle { display: block; }

  /* mobile menu panel */
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    top: 72px; left: 0; right: 0;
    background: var(--bg-soft);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px 24px;
    gap: 4px;
  }
  .nav-links.mobile-open a { padding: 12px 14px; font-size: 16px; }

  .grid-2, .grid-3, .grid-4, .split { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; padding: 28px; }
  body { font-size: 16px; }
}

@media (max-width: 440px) {
  .container { padding-inline: 18px; }
}

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
}