/* ===================================================================
   Qubit — Apple-inspired technical site
   ================================================================== */

:root {
  --qb-navy: #1e3f8a;
  --qb-navy-dark: #14306b;
  --qb-blue: #0071e3;
  --qb-blue-hover: #0a82f5;
  --qb-bg: #ffffff;
  --qb-bg-soft: #fbfbfd;
  --qb-bg-section: #f5f5f7;
  --qb-bg-dark: #000000;
  --qb-bg-near-black: #0b0b0d;
  --qb-text: #1d1d1f;
  --qb-text-secondary: #6e6e73;
  --qb-text-tertiary: #86868b;
  --qb-text-inverse: #f5f5f7;
  --qb-border: #d2d2d7;
  --qb-border-soft: #e5e5ea;
  --qb-radius: 18px;
  --qb-radius-lg: 28px;
  --qb-shadow-soft: 0 12px 40px rgba(0,0,0,0.06);
  --qb-shadow-strong: 0 20px 60px rgba(0,0,0,0.10);
  --qb-max-width: 1200px;
  --qb-nav-height: 56px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
               "Pretendard", "Inter", "Helvetica Neue", Arial, sans-serif;
  font-weight: 400;
  color: var(--qb-text);
  background: var(--qb-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: -0.011em;
  line-height: 1.4;
}

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

/* ===== NAVIGATION ===== */
.qb-nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--qb-nav-height);
  z-index: 1000;
  background: rgba(255,255,255,0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.04);
}

.qb-nav-inner {
  max-width: var(--qb-max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.qb-nav-logo {
  display: flex;
  align-items: center;
  height: 100%;
}
.qb-nav-logo img { height: 26px; width: auto; }

.qb-nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
  align-items: center;
}
.qb-nav-links a {
  font-size: 12px;
  font-weight: 400;
  color: var(--qb-text);
  opacity: 0.88;
  transition: opacity 0.18s;
  letter-spacing: -0.01em;
}
.qb-nav-links a:hover { opacity: 1; }

.qb-lang {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 500;
}
.qb-lang span { color: var(--qb-text); }
.qb-lang a { color: var(--qb-text-secondary); opacity: 0.8; }
.qb-lang a:hover { opacity: 1; color: var(--qb-blue); }
.qb-lang-divider { color: var(--qb-border); }

.qb-burger {
  display: none;
  width: 24px;
  height: 24px;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}
.qb-burger span {
  display: block;
  height: 1.5px;
  background: var(--qb-text);
  transition: 0.2s;
}

/* ===== MOBILE NAV ===== */
.qb-nav-mobile {
  display: none;
  position: fixed;
  top: var(--qb-nav-height);
  left: 0; right: 0;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(20px);
  padding: 24px;
  flex-direction: column;
  gap: 18px;
  border-bottom: 1px solid var(--qb-border-soft);
  z-index: 999;
  transform: translateY(-100%);
  transition: transform 0.3s ease;
}
.qb-nav-mobile.open {
  display: flex;
  transform: translateY(0);
}
.qb-nav-mobile a {
  font-size: 16px;
  color: var(--qb-text);
  padding: 4px 0;
}

/* ===== HERO — Precision Grid (dark, technical) ===== */
.qb-hero {
  min-height: 100vh;
  padding: calc(var(--qb-nav-height) + 80px) 24px 60px;
  background: #0a1226;
  display: flex;
  align-items: center;
  overflow: hidden;
  position: relative;
  color: #ffffff;
}

/* Precise grid — line pattern on dark (white, low opacity) */
.qb-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: center center;
  mask-image:
    radial-gradient(ellipse 95% 75% at 50% 50%, #000 35%, transparent 85%);
  -webkit-mask-image:
    radial-gradient(ellipse 95% 75% at 50% 50%, #000 35%, transparent 85%);
  z-index: 0;
  pointer-events: none;
}

/* (no bottom fade — clean single-tone dark hero ends crisply at next section) */

.qb-hero-inner {
  position: relative;
  z-index: 3;
  max-width: var(--qb-max-width);
  margin: 0 auto;
  width: 100%;
  text-align: center;
}

.qb-hero-text {
  max-width: 920px;
  margin: 0 auto;
}

.qb-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 600;
  color: #b8d1ff;
  margin-bottom: 28px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(120, 160, 255, 0.08);
  border: 1px solid rgba(120, 160, 255, 0.28);
}
.qb-hero-eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #b8d1ff;
  box-shadow: 0 0 0 3px rgba(120, 160, 255, 0.22);
}

.qb-hero-title {
  font-size: clamp(44px, 7vw, 92px);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.038em;
  color: #ffffff;
  margin: 0 0 24px 0;
}
.qb-hero-title .accent {
  color: #b8d1ff;
  background: none;
  -webkit-text-fill-color: #b8d1ff;
}

.qb-hero-desc {
  font-size: clamp(17px, 1.6vw, 20px);
  font-weight: 400;
  color: rgba(255, 255, 255, 0.72);
  margin: 0 auto 40px;
  max-width: 640px;
  line-height: 1.55;
  letter-spacing: -0.012em;
}

.qb-hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
/* Dark-hero button overrides */
.qb-hero .qb-btn-primary {
  background: #ffffff;
  color: #0a1226;
}
.qb-hero .qb-btn-primary:hover {
  background: #e6e6ec;
}
.qb-hero .qb-btn-secondary {
  color: #b8d1ff;
}
.qb-hero .qb-btn-secondary:hover {
  color: #ffffff;
}

/* Bottom meta — small technical credentials row */
.qb-hero-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px 56px;
  max-width: 720px;
  margin: 64px auto 0;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}
.qb-hero-meta-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 4px;
  min-width: 140px;
}
.qb-hero-meta-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
}
.qb-hero-meta-value {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  letter-spacing: -0.01em;
}

@media (max-width: 900px) {
  .qb-hero-meta { gap: 18px 28px; margin-top: 32px; padding-top: 24px; }
}

/* Buttons (Apple-style) */
.qb-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 22px;
  border-radius: 980px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: 0.18s;
  white-space: nowrap;
  border: 1px solid transparent;
  cursor: pointer;
}
.qb-btn-primary {
  background: var(--qb-blue);
  color: #fff;
}
.qb-btn-primary:hover { background: var(--qb-blue-hover); }
.qb-btn-secondary {
  background: transparent;
  color: var(--qb-blue);
  border-color: transparent;
}
.qb-btn-secondary:hover { color: var(--qb-blue-hover); }
.qb-btn-secondary::after { content: " ›"; }

/* (qb-hero-orb removed — replaced by precision SVG art) */

/* ===== SECTION FRAMEWORK ===== */
.qb-section {
  padding: clamp(80px, 12vw, 140px) 24px;
  background: var(--qb-bg);
}
.qb-section.alt    { background: var(--qb-bg-section); }
.qb-section.soft   { background: var(--qb-bg-soft); }
.qb-section.dark   { background: var(--qb-bg-near-black); color: var(--qb-text-inverse); }
.qb-section.dark .qb-section-title { color: #fff; }
.qb-section.dark .qb-section-eyebrow { color: var(--qb-blue); }
.qb-section.dark .qb-section-desc { color: rgba(255,255,255,0.65); }

.qb-container {
  max-width: var(--qb-max-width);
  margin: 0 auto;
}

.qb-section-header {
  margin-bottom: 64px;
  max-width: 900px;
}
.qb-section-header.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}
.qb-section-eyebrow {
  font-size: 13px;
  font-weight: 600;
  color: var(--qb-blue);
  letter-spacing: 0.04em;
  margin-bottom: 14px;
  display: block;
}
.qb-section-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--qb-text);
  margin-bottom: 18px;
}
.qb-section-desc {
  font-size: clamp(17px, 1.6vw, 21px);
  color: var(--qb-text-secondary);
  line-height: 1.5;
  max-width: 720px;
}
.qb-section-header.center .qb-section-desc { margin: 0 auto; }

/* ===== CEO MESSAGE ===== */
.qb-ceo-wrap {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}
.qb-ceo-quote {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 600;
  color: var(--qb-text-primary);
  line-height: 1.32;
  letter-spacing: -0.022em;
  margin: 0 0 40px 0;
  position: relative;
}
.qb-ceo-quote::before,
.qb-ceo-quote::after {
  content: "";
  display: block;
  width: 36px;
  height: 2px;
  background: var(--qb-blue);
  opacity: 0.6;
  margin: 0 auto 28px;
}
.qb-ceo-quote::after {
  margin: 28px auto 0;
}
.qb-ceo-body {
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.78;
  color: var(--qb-text-secondary);
  text-align: left;
  max-width: 640px;
  margin: 0 auto;
}
.qb-ceo-body p {
  margin: 0 0 18px 0;
}
.qb-ceo-body p:last-child { margin-bottom: 0; }
.qb-ceo-sign {
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.qb-ceo-sign-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--qb-text-primary);
  letter-spacing: -0.01em;
}
.qb-ceo-sign-role {
  font-size: 12px;
  font-weight: 500;
  color: var(--qb-text-secondary);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* ===== ABOUT ===== */
.qb-about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.qb-about-card {
  background: linear-gradient(135deg, #ffffff 0%, #f5f5f7 100%);
  border-radius: var(--qb-radius-lg);
  padding: 56px 44px;
  box-shadow: var(--qb-shadow-soft);
  border: 1px solid var(--qb-border-soft);
}
.qb-about-card img { height: 38px; width: auto; margin-bottom: 22px; }
.qb-about-card-tag {
  font-size: 15px;
  color: var(--qb-text-secondary);
  margin-bottom: 24px;
}
.qb-chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.qb-chip {
  font-size: 12px;
  padding: 7px 14px;
  border-radius: 980px;
  background: #fff;
  color: var(--qb-text);
  border: 1px solid var(--qb-border-soft);
  font-weight: 500;
}
.qb-about-stats {
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--qb-border-soft);
  display: flex;
  gap: 40px;
}
.qb-stat-label {
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--qb-text-tertiary);
  text-transform: uppercase;
  display: block;
  margin-bottom: 4px;
}
.qb-stat-value { font-size: 16px; font-weight: 600; color: var(--qb-text); }

.qb-value-list { list-style: none; margin-top: 30px; }
.qb-value-item {
  display: flex;
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--qb-border-soft);
}
.qb-value-item:first-child { border-top: 0; padding-top: 0; }
.qb-value-icon {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: rgba(0,113,227,0.10);
  color: var(--qb-blue);
  display: flex;
  align-items: center;
  justify-content: center;
}
.qb-value-text h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--qb-text);
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}
.qb-value-text p {
  font-size: 14px;
  color: var(--qb-text-secondary);
  line-height: 1.5;
}

/* ===== SERVICES (large feature cards) ===== */
.qb-services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.qb-service-card {
  background: #fff;
  border-radius: var(--qb-radius-lg);
  padding: 48px 40px;
  box-shadow: var(--qb-shadow-soft);
  border: 1px solid var(--qb-border-soft);
  transition: transform 0.3s, box-shadow 0.3s;
}
.qb-service-card.large {
  grid-column: span 2;
  padding: 64px 56px;
}
.qb-service-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--qb-shadow-strong);
}
.qb-service-icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--qb-navy), var(--qb-blue));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}
.qb-service-card h3 {
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  color: var(--qb-text);
}
.qb-service-card p {
  font-size: 15px;
  color: var(--qb-text-secondary);
  margin-bottom: 22px;
  line-height: 1.55;
}
.qb-service-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.qb-service-tag {
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 980px;
  background: var(--qb-bg-section);
  color: var(--qb-text-secondary);
  font-weight: 500;
}

.qb-section.dark .qb-service-card {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.10);
}
.qb-section.dark .qb-service-card h3 { color: #fff; }
.qb-section.dark .qb-service-card p { color: rgba(255,255,255,0.65); }
.qb-section.dark .qb-service-tag {
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.75);
}

/* ===== TECHNOLOGY ===== */
.qb-tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.qb-tech-card {
  background: #fff;
  border-radius: var(--qb-radius);
  padding: 36px 32px;
  border: 1px solid var(--qb-border-soft);
}
.qb-tech-card-head {
  display: flex;
  gap: 14px;
  margin-bottom: 22px;
  align-items: flex-start;
}
.qb-tech-card-icon {
  flex-shrink: 0;
  width: 40px; height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--qb-navy), var(--qb-blue));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}
.qb-tech-card h3 {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--qb-text);
  margin-bottom: 2px;
}
.qb-tech-card-head p {
  font-size: 13px;
  color: var(--qb-text-secondary);
}
.qb-tech-item {
  padding: 12px 0;
  border-top: 1px solid var(--qb-border-soft);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.qb-tech-item:first-child { border-top: 0; padding-top: 0; }
.qb-tech-item-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--qb-blue);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.qb-tech-item-value {
  font-size: 14px;
  color: var(--qb-text-secondary);
  line-height: 1.5;
}

.qb-tech-card-full {
  grid-column: span 2;
}
.qb-tech-chips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}
.qb-tech-chip-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--qb-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
}

/* ===== TIMELINE (history) ===== */
.qb-timeline {
  position: relative;
  max-width: 880px;
  margin: 0 auto;
  padding-left: 32px;
}
.qb-timeline::before {
  content: "";
  position: absolute;
  left: 8px; top: 4px; bottom: 4px;
  width: 1px;
  background: rgba(255,255,255,0.18);
}
.qb-timeline-item {
  position: relative;
  padding-bottom: 36px;
}
.qb-timeline-item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 8px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--qb-blue);
  box-shadow: 0 0 0 4px rgba(0,113,227,0.20);
}
.qb-timeline-item.highlight::before {
  background: linear-gradient(135deg, #fff, var(--qb-blue));
  box-shadow: 0 0 0 5px rgba(255,255,255,0.10);
}
.qb-timeline-year {
  font-size: 13px;
  color: rgba(255,255,255,0.50);
  letter-spacing: 0.04em;
  font-weight: 600;
  margin-bottom: 6px;
}
.qb-timeline-title {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: #fff;
  margin-bottom: 6px;
}
.qb-timeline-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.62);
  line-height: 1.55;
  max-width: 640px;
}

/* ===== CONTACT ===== */
.qb-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}
.qb-contact-info h3 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  color: var(--qb-text);
}
.qb-contact-info p {
  font-size: 15px;
  color: var(--qb-text-secondary);
  margin-bottom: 28px;
  line-height: 1.6;
}
.qb-contact-list { display: flex; flex-direction: column; gap: 16px; }
.qb-contact-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: #fff;
  border: 1px solid var(--qb-border-soft);
  border-radius: 14px;
}
.qb-contact-row-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: rgba(0,113,227,0.10);
  color: var(--qb-blue);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.qb-contact-row-label {
  font-size: 11px;
  color: var(--qb-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  margin-bottom: 2px;
}
.qb-contact-row-value {
  font-size: 15px;
  color: var(--qb-text);
  font-weight: 500;
}

.qb-form {
  background: #fff;
  border-radius: var(--qb-radius-lg);
  padding: 36px 32px;
  border: 1px solid var(--qb-border-soft);
  box-shadow: var(--qb-shadow-soft);
}
.qb-form h3 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}
.qb-form-group {
  margin-bottom: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.qb-form-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--qb-text);
  letter-spacing: -0.005em;
}
.qb-form-group input,
.qb-form-group select,
.qb-form-group textarea {
  font: inherit;
  padding: 12px 14px;
  background: var(--qb-bg-section);
  border: 1px solid transparent;
  border-radius: 12px;
  color: var(--qb-text);
  transition: border-color 0.2s, background 0.2s;
}
.qb-form-group input:focus,
.qb-form-group select:focus,
.qb-form-group textarea:focus {
  outline: none;
  border-color: var(--qb-blue);
  background: #fff;
}
.qb-form-group textarea { resize: vertical; min-height: 120px; }
.qb-form-submit {
  width: 100%;
  background: var(--qb-blue);
  color: #fff;
  border: 0;
  padding: 14px;
  border-radius: 980px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}
.qb-form-submit:hover { background: var(--qb-blue-hover); }

/* ===== FOOTER ===== */
.qb-footer {
  background: var(--qb-bg-near-black);
  color: rgba(255,255,255,0.55);
  padding: 56px 24px 32px;
  font-size: 12px;
}
.qb-footer-inner {
  max-width: var(--qb-max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255,255,255,0.10);
}
.qb-footer-brand img {
  height: 24px;
  filter: brightness(0) invert(1);
  margin-bottom: 14px;
}
.qb-footer-brand p {
  font-size: 13px;
  line-height: 1.55;
  max-width: 320px;
}
.qb-footer-col h4 {
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.qb-footer-col ul { list-style: none; }
.qb-footer-col li { margin-bottom: 8px; }
.qb-footer-col a {
  color: rgba(255,255,255,0.55);
  transition: color 0.18s;
}
.qb-footer-col a:hover { color: #fff; }
.qb-footer-bottom {
  max-width: var(--qb-max-width);
  margin: 24px auto 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 11px;
  color: rgba(255,255,255,0.40);
}

/* ===== REVEAL ANIMATION ===== */
.qb-reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.qb-reveal.in {
  opacity: 1;
  transform: none;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .qb-nav-links { display: none; }
  .qb-burger { display: flex; }
  .qb-about-grid { grid-template-columns: 1fr; gap: 40px; }
  .qb-services-grid { grid-template-columns: 1fr; }
  .qb-service-card.large { grid-column: span 1; padding: 48px 32px; }
  .qb-tech-grid { grid-template-columns: 1fr; }
  .qb-tech-card-full { grid-column: span 1; }
  .qb-contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .qb-footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .qb-hero { padding-top: 100px; min-height: 92vh; }
  .qb-hero-title { font-size: clamp(36px, 11vw, 60px); }
  .qb-section { padding: 80px 20px; }
  .qb-section-header { margin-bottom: 48px; }
  .qb-about-card { padding: 36px 28px; }
  .qb-service-card { padding: 36px 28px; }
  .qb-footer-inner { grid-template-columns: 1fr; gap: 26px; }
}