/* ═══════════════════════════════════════════════════════════
   10HUB Limited — Market intelligence
   Editorial minimalism, analytical / data-driven. System fonts.
   Blue-tinted palette.
   ═══════════════════════════════════════════════════════════ */

:root {
  /* Palette — Apple neutral base, blue as a restrained accent */
  --bg:        #fbfbfd;       /* off-white base */
  --bg-white:  #ffffff;       /* pure white accent */
  --bg-soft:   #f5f5f7;       /* light gray section */
  --bg-dark:   #0a1626;       /* near-black, faint navy undertone */
  --text:      #1d1d1f;       /* Apple near-black */
  --text-mute: #6e6e73;       /* neutral gray */
  --text-soft: #86868b;       /* muted gray (eyebrows, numbers) */
  --accent:    #0a6cff;       /* blue — used sparingly */
  --accent-soft:#dce8ff;      /* pale blue wash */
  --rule:      rgba(0,0,0,0.08);
  --rule-light:rgba(255,255,255,0.14);

  /* Type */
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Display",
          "Inter", "Helvetica Neue", Arial, sans-serif;

  /* Layout */
  --maxw: 1200px;
  --pad-x: clamp(20px, 5vw, 48px);
  --pad-y: clamp(64px, 10vw, 120px);

  /* Radius */
  --r-md: 14px;
  --r-lg: 18px;
  --r-pill: 980px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, h5 { margin: 0; font-weight: 600; }
p { margin: 0 0 1em 0; }
p:last-child { margin-bottom: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
::selection { background: var(--accent); color: #fff; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--text); color: var(--bg);
  padding: .75rem 1rem; z-index: 100;
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* ─── Container ─── */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

/* ═══════════════════════════════════════
   TYPOGRAPHY
   ═══════════════════════════════════════ */
.h1 {
  font-size: clamp(36px, 7vw, 72px);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.02;
}
.h2 {
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 600;
  letter-spacing: -0.020em;
  line-height: 1.06;
}
.h3 {
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 600;
  letter-spacing: -0.010em;
  line-height: 1.2;
}
.lead {
  font-size: clamp(16px, 1.6vw, 19px);
  font-weight: 400;
  color: var(--text-mute);
  line-height: 1.55;
  max-width: 60ch;
}
.eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-soft);
}

/* Split-color headline */
.split .soft {
  display: block;
  color: var(--text-soft);
  font-weight: 500;
}

/* ═══════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════ */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 12px 26px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  border-radius: var(--r-pill);
  border: 0.5px solid transparent;
  background: transparent;
  color: var(--text);
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
  cursor: pointer;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: #1559c4;
  border-color: #1559c4;
}
.btn-text {
  padding: 12px 4px;
  border-bottom: 0.5px solid var(--rule);
  border-radius: 0;
  color: var(--text);
}
.btn-text:hover {
  border-bottom-color: var(--accent);
  color: var(--accent);
}
.btn-on-dark.btn-primary {
  background: #fff;
  color: var(--bg-dark);
  border-color: #fff;
}
.btn-on-dark.btn-primary:hover {
  background: var(--accent-soft);
}

/* ═══════════════════════════════════════
   SECTIONS — color rhythm
   ═══════════════════════════════════════ */
section { padding: var(--pad-y) 0; position: relative; }
.section-cream { background: var(--bg); }
.section-white { background: var(--bg-white); }
.section-soft  { background: var(--bg-soft); }
.section-dark  { background: var(--bg-dark); color: #fff; }
.section-dark .lead { color: rgba(255,255,255,0.68); }
.section-dark .eyebrow { color: #6ea8ff; }
.section-dark .split .soft { color: rgba(255,255,255,0.55); }

/* Section header */
.section-head { margin-bottom: clamp(40px, 6vw, 72px); max-width: 900px; }
.section-head .eyebrow { margin-bottom: 20px; }
.section-head .lead { margin-top: 24px; }
.section-head-sm { margin-bottom: clamp(32px, 4vw, 48px); }

/* ═══════════════════════════════════════
   NAV
   ═══════════════════════════════════════ */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251,252,254,0.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 0.5px solid transparent;
  transition: border-color .3s var(--ease);
}
.nav.is-scrolled { border-bottom-color: var(--rule); }
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px var(--pad-x);
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}
.nav-brand {
  display: flex; flex-direction: column; gap: 1px; line-height: 1;
}
.brand-name {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}
.brand-sub {
  font-size: 11px;
  font-weight: 400;
  color: var(--text-soft);
  letter-spacing: 0.01em;
}
.nav-links {
  display: flex; gap: 28px;
  font-size: 13px;
}
.nav-links a {
  color: var(--text-mute);
  padding: 4px 0;
  transition: color .2s var(--ease);
}
.nav-links a:hover { color: var(--accent); }

.nav-toggle {
  display: none;
  background: none; border: 0;
  width: 28px; height: 28px;
  flex-direction: column; justify-content: center; gap: 5px;
  padding: 0;
}
.nav-toggle span {
  display: block; width: 22px; height: 1.5px;
  background: var(--text);
  transition: transform .3s var(--ease), opacity .3s var(--ease);
  border-radius: 2px;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(3.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  transform: translateY(-3.5px) rotate(-45deg);
}

.nav-mobile {
  display: none;
  padding: 8px var(--pad-x) 24px;
  border-top: 0.5px solid var(--rule);
  background: var(--bg);
}
.nav-mobile a {
  display: block;
  padding: 18px 0;
  border-bottom: 0.5px solid var(--rule);
  font-size: 22px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.015em;
}
.nav-mobile a:last-child { border-bottom: 0; }

/* ═══════════════════════════════════════
   HERO
   ═══════════════════════════════════════ */
.hero { padding-top: clamp(60px, 10vw, 100px); padding-bottom: clamp(80px, 12vw, 140px); overflow: hidden; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}
.hero .eyebrow { margin-bottom: 28px; }
.hero .h1 { margin-bottom: 32px; max-width: 16ch; }
.hero .lead { margin-bottom: 40px; max-width: 52ch; }
.hero-actions {
  display: flex; gap: 8px; flex-wrap: wrap; align-items: center;
}

/* ─── Animated analytical chart ─── */
.hero-chart {
  background: var(--bg-white);
  border: 0.5px solid var(--rule);
  border-radius: var(--r-lg);
  padding: 24px 26px 20px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03), 0 12px 40px -16px rgba(0,0,0,0.12);
}
.hero-chart-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 16px;
}
.hero-chart-label {
  font-size: 11px; font-weight: 500; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--text-soft);
}
.hero-chart-delta {
  font-size: 13px; font-weight: 500; color: var(--accent);
  font-feature-settings: "tnum";
}
.hero-chart svg { display: block; width: 100%; height: auto; }
/* NOTE: all chart colors are set as SVG presentation attributes in the
   markup (fill/stroke), never via CSS, so the chart can never fall back
   to black if a CSS variable or gradient fails to resolve. */
.chart-end-ring { transform-box: fill-box; transform-origin: center; }

/* Animation is a pure enhancement layered on top of an already-correct
   static chart. If JS never adds .in, the full chart still shows. */
@media (prefers-reduced-motion: no-preference) {
  /* Pre-animation hidden state ONLY applies once JS has armed the chart
     (html.js-reveal is added by script.js). Without JS, chart stays visible. */
  .js-reveal .hero-chart .chart-trend {
    stroke-dasharray: var(--chart-len, 760);
    stroke-dashoffset: var(--chart-len, 760);
  }
  .js-reveal .hero-chart .chart-area { opacity: 0; }
  .js-reveal .hero-chart .chart-dot { opacity: 0; transform-box: fill-box; transform-origin: center; }
  .js-reveal .hero-chart .chart-end-ring { opacity: 0; }
  .js-reveal .hero-chart .hero-chart-delta { opacity: 0; transform: translateY(4px); }

  .hero-chart.in .chart-trend { animation: chart-draw 1.8s cubic-bezier(0.4,0,0.2,1) forwards; }
  @keyframes chart-draw { to { stroke-dashoffset: 0; } }
  .hero-chart.in .chart-area { opacity: 1; transition: opacity 1s var(--ease) .9s; }
  .hero-chart.in .chart-dot { animation: chart-pop .4s var(--ease) forwards; }
  .hero-chart.in .chart-dot.d1 { animation-delay: .7s; }
  .hero-chart.in .chart-dot.d2 { animation-delay: 1.05s; }
  .hero-chart.in .chart-dot.d3 { animation-delay: 1.4s; }
  @keyframes chart-pop { from { opacity: 0; transform: scale(0); } to { opacity: 1; transform: scale(1); } }
  .hero-chart.in .chart-end-ring { animation: chart-ring 2.1s ease-out infinite; animation-delay: 1.7s; }
  @keyframes chart-ring { 0% { opacity: .5; transform: scale(1); } 100% { opacity: 0; transform: scale(2.6); } }
  .hero-chart.in .hero-chart-delta { opacity: 1; transform: none; transition: opacity .5s var(--ease) 1.6s, transform .5s var(--ease) 1.6s; }
}

/* ═══════════════════════════════════════
   SERVICES — cards grid
   ═══════════════════════════════════════ */
.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.card {
  background: var(--bg-white);
  border-radius: var(--r-lg);
  padding: 32px 28px;
  border: 0.5px solid var(--rule);
  transition: transform .3s var(--ease), border-color .3s var(--ease);
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-2px); }
.card-dark {
  background: var(--bg-dark);
  color: #fff;
  border-color: var(--bg-dark);
}
.card-dark:hover { border-color: var(--accent); }
.card-dark .card-num { color: rgba(255,255,255,0.55); }
.card-dark p,
.card-dark .card-points li {
  color: rgba(255,255,255,0.68);
}
.card-dark .card-points li::before { background: rgba(255,255,255,0.35); }
.card-wide { grid-column: span 2; }
.card-num {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--text-soft);
  margin-bottom: 28px;
  font-feature-settings: "tnum";
}
.card .h3 { margin-bottom: 12px; }
.card p {
  color: var(--text-mute);
  font-size: 15px;
  line-height: 1.55;
  margin-bottom: 24px;
}
.card-points {
  margin-top: auto;
  border-top: 0.5px solid var(--rule);
  padding-top: 20px;
  display: flex; flex-direction: column; gap: 8px;
  font-size: 14px;
  color: var(--text-mute);
}
.card-dark .card-points { border-top-color: rgba(255,255,255,0.14); }
.card-points li {
  padding-left: 16px;
  position: relative;
}
.card-points li::before {
  content: "";
  position: absolute; left: 0; top: 10px;
  width: 8px; height: 1px;
  background: var(--text-soft);
}
.card-points-wide {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px 32px;
}

/* ═══════════════════════════════════════
   PROCESS — phase list
   ═══════════════════════════════════════ */
.process { margin-top: clamp(64px, 10vw, 120px); }
.phase-list { display: flex; flex-direction: column; }
.phase-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  padding: 32px 0;
  border-top: 0.5px solid var(--rule);
  align-items: start;
}
.phase-item:last-child { border-bottom: 0.5px solid var(--rule); }
.phase-num {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--text-soft);
  padding-top: 4px;
  font-feature-settings: "tnum";
}
.phase-body h4 {
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}
.phase-body p {
  color: var(--text-mute);
  font-size: 15px;
  line-height: 1.55;
  max-width: 60ch;
}

/* ═══════════════════════════════════════
   DIFFERENTIATORS (numbered list)
   ═══════════════════════════════════════ */
.diffs { display: flex; flex-direction: column; }
.diff-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  padding: 36px 0;
  border-top: 0.5px solid var(--rule);
  align-items: start;
}
.diff-item:last-child { border-bottom: 0.5px solid var(--rule); }
.diff-num {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--text-soft);
  padding-top: 6px;
  font-feature-settings: "tnum";
}
.diff-body .h3 { margin-bottom: 10px; }
.diff-body p {
  color: var(--text-mute);
  max-width: 62ch;
  line-height: 1.55;
}

/* ═══════════════════════════════════════
   ABOUT
   ═══════════════════════════════════════ */
.about-grid {
  display: grid;
  grid-template-columns: 1.7fr 1fr;
  gap: clamp(32px, 6vw, 80px);
  align-items: start;
}
.about-body .lead { margin-bottom: 28px; }
.about-body p {
  color: var(--text-mute);
  line-height: 1.65;
  max-width: 62ch;
  margin-bottom: 18px;
}

.facts {
  background: var(--bg-white);
  border-radius: var(--r-lg);
  padding: 8px 24px;
  border: 0.5px solid var(--rule);
}
.facts dl { margin: 0; }
.fact {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 0.5px solid var(--rule);
  align-items: baseline;
}
.fact:last-child { border-bottom: 0; }
.fact dt {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-soft);
}
.fact dd {
  margin: 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.005em;
}

/* Who we work with */
.clients-block { margin-top: clamp(64px, 10vw, 100px); }
.clients-list { display: flex; flex-direction: column; }
.clients-list li {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-top: 0.5px solid var(--rule);
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 500;
  letter-spacing: -0.01em;
  align-items: center;
}
.clients-list li:last-child { border-bottom: 0.5px solid var(--rule); }
.client-num {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--text-soft);
  font-feature-settings: "tnum";
}

/* ═══════════════════════════════════════
   CONTACT
   ═══════════════════════════════════════ */
.contact-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: clamp(32px, 6vw, 80px);
  align-items: start;
}
.contact-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px 28px;
}
.field { display: flex; flex-direction: column; gap: 8px; }
.field-full { grid-column: span 2; }
.field label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
}
.field .req { color: #6ea8ff; }
.field input,
.field textarea,
.field select {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: 0;
  border-bottom: 0.5px solid rgba(255,255,255,0.24);
  border-radius: 0;
  color: #fff;
  font: inherit;
  font-size: 16px;
  padding: 10px 0;
  transition: border-color .2s var(--ease);
}
.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-bottom-color: #6ea8ff;
}
.field textarea {
  resize: vertical;
  min-height: 100px;
  font-family: inherit;
  line-height: 1.5;
}
.select-wrap { position: relative; }
.select-wrap::after {
  content: "";
  position: absolute;
  right: 6px; top: 50%;
  transform: translateY(-50%) rotate(45deg);
  width: 7px; height: 7px;
  border-right: 1.5px solid rgba(255,255,255,0.6);
  border-bottom: 1.5px solid rgba(255,255,255,0.6);
  pointer-events: none;
}
.field select option {
  background: var(--bg-dark);
  color: #fff;
}
.field-submit {
  margin-top: 8px;
  display: flex; flex-direction: row; gap: 24px; align-items: center; flex-wrap: wrap;
}
.form-note {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  margin: 0;
}
.form-note a {
  color: #fff;
  border-bottom: 0.5px solid rgba(255,255,255,0.4);
  padding-bottom: 2px;
}
.form-note a:hover { border-bottom-color: #6ea8ff; }

.contact-info {
  padding-left: 0;
  display: flex; flex-direction: column;
}
.info-block {
  padding: 18px 0;
  border-bottom: 0.5px solid rgba(255,255,255,0.12);
  display: flex; flex-direction: column; gap: 6px;
}
.info-block:first-child { padding-top: 0; }
.info-block:last-child { border-bottom: 0; }
.info-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
}
.info-value {
  font-size: 17px;
  font-weight: 500;
  color: #fff;
  letter-spacing: -0.01em;
}
a.info-value:hover { color: #6ea8ff; }

/* ═══════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════ */
.footer {
  background: var(--bg);
  padding: clamp(48px, 7vw, 80px) 0 32px;
  border-top: 0.5px solid var(--rule);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 40px;
  border-bottom: 0.5px solid var(--rule);
}
.footer-brand .brand-name { font-size: 16px; }
.footer-tagline {
  font-size: 14px;
  color: var(--text-mute);
  margin: 12px 0 0;
  max-width: 28ch;
  line-height: 1.5;
}
.footer-nav, .footer-legal {
  display: flex; flex-direction: column; gap: 12px;
}
.footer-nav .eyebrow, .footer-legal .eyebrow {
  margin-bottom: 4px;
  color: var(--text-soft);
}
.footer-nav a, .footer-legal a {
  font-size: 14px;
  color: var(--text-mute);
  transition: color .2s var(--ease);
}
.footer-nav a:hover, .footer-legal a:hover { color: var(--accent); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 24px;
  font-size: 12px;
  color: var(--text-soft);
}

/* ═══════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════ */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-mobile.is-open { display: block; }

  .hero-grid { grid-template-columns: 1fr; gap: clamp(40px, 8vw, 56px); }
  .hero-chart { order: 2; }

  .cards { grid-template-columns: 1fr; }
  .card-wide { grid-column: span 1; }
  .card-points-wide { grid-template-columns: 1fr; }

  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .contact-form { grid-template-columns: 1fr; }
  .field-full { grid-column: span 1; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 10px; align-items: flex-start; }
}

@media (max-width: 640px) {
  .phase-item, .diff-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .phase-num, .diff-num { padding-top: 0; }
  .clients-list li {
    grid-template-columns: 1fr;
    gap: 6px;
    align-items: flex-start;
  }
  .fact { grid-template-columns: 1fr; gap: 4px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .field-submit { flex-direction: column; align-items: stretch; }
  .field-submit .btn { width: 100%; justify-content: center; }
  .form-note { text-align: center; }
}

/* ═══════════════════════════════════════
   MOTION — progressive enhancement
   ═══════════════════════════════════════ */
@media (prefers-reduced-motion: no-preference) {
  .js-reveal .reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity .8s var(--ease), transform .8s var(--ease);
    will-change: opacity, transform;
  }
  .js-reveal .reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}