/* ===== QBAI Consulting — styles ===== */
/* Palette derived from the brand logo:
   navy #0F2573 · mid-blue #266CA9 · light-blue #ADE1FB */

:root {
  --navy-900: #0a1538;
  --navy-800: #0f2573;
  --navy-700: #163086;
  --blue-600: #266ca9;
  --blue-500: #3a86c9;
  --blue-300: #7dc0ee;
  --blue-200: #ade1fb;
  --ink: #0a1023;
  --paper: #f5f8fc;
  --paper-2: #eaf1f9;
  --white: #ffffff;

  --text: #e8eefb;
  --text-dim: #aebbd6;
  --text-ink: #1c2540;
  --text-ink-dim: #51607e;

  --radius: 16px;
  --radius-lg: 24px;
  --maxw: 1140px;
  --shadow: 0 20px 50px -20px rgba(8, 18, 50, 0.45);
  --shadow-soft: 0 10px 30px -12px rgba(8, 18, 50, 0.25);

  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Sora', 'Inter', system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text-ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--navy-800);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 10px 0;
  z-index: 200;
}
.skip-link:focus { left: 0; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 21, 56, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(173, 225, 251, 0.12);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}
.brand-mark {
  border-radius: 11px;
  box-shadow: 0 6px 18px -6px rgba(15, 37, 115, 0.7);
}
.brand-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.18rem;
  letter-spacing: 0.3px;
  color: #fff;
}
.brand-sub {
  font-weight: 600;
  color: var(--blue-200);
  margin-left: 2px;
}

.nav { display: flex; align-items: center; }
.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-menu a {
  display: inline-block;
  padding: 9px 14px;
  border-radius: 999px;
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--text-dim);
  transition: color 0.2s, background 0.2s;
}
.nav-menu a:hover { color: #fff; background: rgba(173, 225, 251, 0.08); }
.nav-cta {
  background: var(--blue-200) !important;
  color: var(--navy-900) !important;
  font-weight: 700 !important;
}
.nav-cta:hover { background: #fff !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  background: rgba(173, 225, 251, 0.1);
  border: none;
  border-radius: 11px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
  border: 1px solid transparent;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
  color: #fff;
  box-shadow: 0 12px 28px -12px rgba(38, 108, 169, 0.85);
}
.btn-primary:hover {
  box-shadow: 0 16px 34px -12px rgba(38, 108, 169, 0.95);
  transform: translateY(-2px);
}
.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(173, 225, 251, 0.35);
}
.btn-ghost:hover { background: rgba(173, 225, 251, 0.1); }
.btn-block { width: 100%; }

/* ===== Hero ===== */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(1200px 500px at 15% -10%, rgba(38, 108, 169, 0.45), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(173, 225, 251, 0.18), transparent 55%),
    linear-gradient(180deg, var(--navy-900), #0c1c4d 60%, var(--navy-800));
  color: #fff;
  padding: clamp(72px, 12vw, 140px) 0 clamp(80px, 12vw, 130px);
}
.hero-glow {
  position: absolute;
  width: 520px; height: 520px;
  right: -120px; top: -120px;
  background: radial-gradient(circle, rgba(173, 225, 251, 0.28), transparent 65%);
  filter: blur(20px);
  pointer-events: none;
}
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(173, 225, 251, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(173, 225, 251, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 820px; }
.eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-200);
  background: rgba(173, 225, 251, 0.1);
  border: 1px solid rgba(173, 225, 251, 0.22);
  padding: 7px 14px;
  border-radius: 999px;
  margin: 0 0 22px;
}
.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.3rem, 6vw, 4rem);
  line-height: 1.05;
  letter-spacing: -1px;
  margin: 0 0 22px;
  background: linear-gradient(180deg, #fff, var(--blue-200));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lead {
  font-size: clamp(1.05rem, 2.2vw, 1.28rem);
  color: var(--text-dim);
  max-width: 660px;
  margin: 0 0 34px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 38px; }
.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
  color: var(--text-dim);
}
.hero-points li { display: inline-flex; align-items: center; gap: 9px; }
.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--blue-200);
  box-shadow: 0 0 0 4px rgba(173, 225, 251, 0.18);
}

/* ===== Sections ===== */
.section { padding: clamp(64px, 10vw, 110px) 0; }
.section-alt { background: var(--paper-2); }
.section-head { max-width: 720px; margin-bottom: 52px; }
.kicker {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--blue-600);
  margin-bottom: 14px;
}
.section h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.5px;
  margin: 0 0 16px;
  color: var(--navy-800);
}
.section-sub {
  font-size: 1.08rem;
  color: var(--text-ink-dim);
  margin: 0;
}

/* ===== Stats ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.stat-card {
  background: var(--white);
  border: 1px solid rgba(38, 108, 169, 0.12);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue-600), var(--blue-200));
}
.stat-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 5vw, 3.1rem);
  line-height: 1;
  color: var(--navy-800);
  margin-bottom: 12px;
  letter-spacing: -1px;
}
.stat-frac { color: var(--blue-500); font-size: 0.55em; }
.stat-label {
  font-size: 0.96rem;
  color: var(--text-ink-dim);
  margin: 0;
}
.sources {
  margin-top: 28px;
  font-size: 0.85rem;
  font-style: italic;
  color: var(--text-ink-dim);
}

/* ===== Service cards ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.card {
  background: var(--white);
  border: 1px solid rgba(38, 108, 169, 0.12);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.25s ease, border-color 0.2s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(38, 108, 169, 0.3);
}
.card-icon {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  font-size: 1.5rem;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(38, 108, 169, 0.12), rgba(173, 225, 251, 0.25));
  margin-bottom: 18px;
}
.card h3 {
  font-family: var(--font-display);
  font-size: 1.18rem;
  margin: 0 0 10px;
  color: var(--navy-800);
}
.card p { margin: 0; color: var(--text-ink-dim); font-size: 0.97rem; }

/* ===== Steps ===== */
.steps {
  list-style: none;
  margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 30px 24px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--white), #fbfdff);
  border: 1px solid rgba(38, 108, 169, 0.12);
  box-shadow: var(--shadow-soft);
}
.step-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 12px;
  margin-bottom: 16px;
}
.step h3 {
  font-family: var(--font-display);
  font-size: 1.12rem;
  margin: 0 0 8px;
  color: var(--navy-800);
}
.step p { margin: 0; font-size: 0.95rem; color: var(--text-ink-dim); }

/* ===== Why ===== */
.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.why-lead { font-size: 1.08rem; color: var(--text-ink-dim); margin: 14px 0 0; }
.why-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.why-list li {
  position: relative;
  padding: 18px 20px 18px 52px;
  background: var(--white);
  border: 1px solid rgba(38, 108, 169, 0.12);
  border-radius: 14px;
  box-shadow: var(--shadow-soft);
  color: var(--text-ink-dim);
}
.why-list li::before {
  content: "✓";
  position: absolute;
  left: 18px; top: 18px;
  width: 24px; height: 24px;
  display: grid; place-items: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
  background: var(--blue-600);
  border-radius: 50%;
}
.why-list strong { color: var(--navy-800); }

.principal-note {
  display: flex;
  gap: 13px;
  align-items: flex-start;
  margin: 22px 0 0;
  padding: 16px 18px;
  background: rgba(38, 108, 169, 0.06);
  border: 1px solid rgba(38, 108, 169, 0.15);
  border-radius: 14px;
  font-size: 0.98rem;
  color: var(--text-ink-dim);
}
.principal-badge {
  flex: none;
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 50%;
  font-size: 1rem;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
}

/* ===== Contact ===== */
.contact { background: var(--paper-2); }
.contact-card {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 44px;
  align-items: center;
  background:
    radial-gradient(700px 300px at 100% 0%, rgba(38, 108, 169, 0.5), transparent 60%),
    linear-gradient(135deg, var(--navy-900), var(--navy-800));
  color: #fff;
  border-radius: var(--radius-lg);
  padding: clamp(34px, 5vw, 56px);
  box-shadow: var(--shadow);
}
.contact-card .kicker { color: var(--blue-200); }
.contact-card h2 { color: #fff; }
.contact-copy p { color: var(--text-dim); margin: 0 0 26px; }
.contact-methods { display: grid; gap: 14px; }
.contact-actions { display: grid; gap: 14px; }

/* Contact form (on dark card) */
.contact-form { display: grid; gap: 16px; }
.hp-field { display: none; }
.field { display: grid; gap: 7px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--blue-200);
}
.field .opt { color: var(--text-dim); font-weight: 400; }
.contact-form input,
.contact-form textarea {
  width: 100%;
  font: inherit;
  color: #fff;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(173, 225, 251, 0.22);
  border-radius: 12px;
  padding: 12px 14px;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
.contact-form textarea { resize: vertical; min-height: 96px; }
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: rgba(174, 187, 214, 0.7); }
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--blue-200);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 0 3px rgba(173, 225, 251, 0.15);
}
.contact-form .btn { margin-top: 4px; }
.form-note {
  margin: 2px 0 0;
  font-size: 0.85rem;
  color: var(--text-dim);
  text-align: center;
}
@media (max-width: 480px) {
  .field-row { grid-template-columns: 1fr; }
}
.contact-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  border-radius: 14px;
  background: rgba(173, 225, 251, 0.08);
  border: 1px solid rgba(173, 225, 251, 0.18);
  transition: background 0.2s, transform 0.15s;
}
.contact-link:hover { background: rgba(173, 225, 251, 0.16); transform: translateY(-2px); }
.contact-ico { font-size: 1.3rem; }
.contact-label {
  display: block;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--blue-200);
}
.contact-value { display: block; font-weight: 600; font-size: 1.02rem; }

/* ===== Footer ===== */
.site-footer {
  background: var(--navy-900);
  color: var(--text-dim);
  padding: 48px 0 36px;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  justify-content: space-between;
  align-items: flex-start;
}
.footer-brand { display: flex; gap: 14px; align-items: flex-start; }
.footer-brand .brand-text { display: block; }
.footer-brand p { margin: 4px 0 0; font-size: 0.92rem; color: var(--text-dim); }
.footer-meta { display: grid; gap: 6px; text-align: right; font-size: 0.92rem; }
.footer-meta a:hover { color: var(--blue-200); }
.copyright { color: #7c8bb0; font-size: 0.84rem; margin-top: 8px; }

/* ===== Testimonials ===== */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.testimonial {
  position: relative;
  margin: 0;
  padding: 34px 30px 28px;
  background: var(--white);
  border: 1px solid rgba(38, 108, 169, 0.12);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}
.quote-mark {
  font-family: var(--font-display);
  font-size: 4rem;
  line-height: 0.7;
  color: var(--blue-200);
  height: 34px;
  margin-bottom: 6px;
  user-select: none;
}
.testimonial blockquote {
  margin: 0 0 22px;
  font-size: 1.04rem;
  color: var(--text-ink);
  line-height: 1.7;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid rgba(38, 108, 169, 0.1);
  padding-top: 18px;
}
.avatar {
  flex: none;
  width: 46px; height: 46px;
  display: grid; place-items: center;
  border-radius: 50%;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: #fff;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
}
.author-name { display: block; font-weight: 700; color: var(--navy-800); }
.author-role { display: block; font-size: 0.9rem; color: var(--text-ink-dim); }

@media (max-width: 720px) {
  .testimonial-grid { grid-template-columns: 1fr; }
}

/* ===== AI-explained page ===== */
.hero-compact { padding: clamp(56px, 9vw, 96px) 0 clamp(48px, 8vw, 80px); }
.back-link { color: var(--blue-200); }
.back-link:hover { color: #fff; }

.cards-3 { grid-template-columns: repeat(3, 1fr); }

.analogy { display: flex; flex-direction: column; }
.analogy-tag {
  align-self: flex-start;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-600);
  background: rgba(38, 108, 169, 0.1);
  border: 1px solid rgba(38, 108, 169, 0.2);
  padding: 5px 11px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.analogy h3 { font-size: 1.08rem; }
.analogy-thread {
  background: linear-gradient(135deg, var(--navy-900), var(--navy-800));
  border-color: rgba(173, 225, 251, 0.25);
}
.analogy-thread .analogy-tag {
  color: var(--blue-200);
  background: rgba(173, 225, 251, 0.12);
  border-color: rgba(173, 225, 251, 0.28);
}
.analogy-thread h3 { color: #fff; }
.analogy-thread p { color: var(--text-dim); }
.analogy-thread strong { color: var(--blue-200); }

.steps-6 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 980px) {
  .cards-3 { grid-template-columns: repeat(2, 1fr); }
  .steps-6 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .cards-3 { grid-template-columns: 1fr; }
  .steps-6 { grid-template-columns: 1fr; }
}

/* ===== Reveal animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 980px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; gap: 30px; }
  .contact-card { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: absolute;
    top: 72px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: var(--navy-900);
    border-bottom: 1px solid rgba(173, 225, 251, 0.12);
    padding: 14px 24px 22px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.22s ease, opacity 0.22s ease;
  }
  .nav-menu.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-menu a { padding: 13px 14px; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .stats-grid { grid-template-columns: 1fr; }
  .cards-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; }
  .footer-meta { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .card, .contact-link { transition: none; }
}