/* =============================================
   NEXUS Corp — style.css
   ============================================= */

/* ── 1. RESET & CUSTOM PROPERTIES ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --navy:        #0F2747;
  --navy-mid:    #162d55;
  --navy-light:  #1e3d70;
  --blue:        #2D7FF9;
  --blue-dark:   #1a60d0;
  --blue-glow:   rgba(45,127,249,.18);
  --white:       #ffffff;
  --off-white:   #f5f7fc;
  --gray-100:    #f0f3f9;
  --gray-200:    #e2e8f4;
  --gray-400:    #9aa5bc;
  --gray-600:    #5a6680;
  --gray-800:    #2a3550;
  --text:        #1a2340;
  --text-light:  #5a6680;

  --font-en:     'Inter', sans-serif;
  --font-kr:     'Noto Sans KR', sans-serif;

  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   20px;
  --radius-xl:   32px;

  --shadow-sm:   0 2px 8px rgba(15,39,71,.08);
  --shadow-md:   0 8px 32px rgba(15,39,71,.12);
  --shadow-lg:   0 20px 60px rgba(15,39,71,.18);

  --transition:  0.28s cubic-bezier(.4,0,.2,1);
  --section-pad: clamp(64px, 8vw, 110px);
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-kr);
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }

.container {
  width: min(1200px, 92%);
  margin-inline: auto;
}

.section { padding-block: var(--section-pad); }
.section--dark { background: var(--navy); }
.section--accent { background: var(--navy-mid); }

.pc-only { display: inline; }

/* ── 2. TYPOGRAPHY ── */
.section-eyebrow {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 14px;
}
.section-eyebrow--light { color: rgba(45,127,249,.85); }

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--navy);
  letter-spacing: -0.5px;
}
.section-title--light { color: var(--white); }

.section-head {
  text-align: center;
  margin-bottom: clamp(40px, 6vw, 72px);
}

/* ── 3. BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 700;
  transition: var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--blue);
  color: var(--white);
  box-shadow: 0 6px 24px rgba(45,127,249,.35);
}
.btn--primary:hover {
  background: var(--blue-dark);
  box-shadow: 0 10px 32px rgba(45,127,249,.45);
  transform: translateY(-2px);
}
.btn--ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,.5);
}
.btn--ghost:hover {
  background: rgba(255,255,255,.1);
  border-color: var(--white);
  transform: translateY(-2px);
}
.btn--sm { padding: 10px 24px; font-size: 14px; }
.btn--full { width: 100%; justify-content: center; }

/* ── 4. HEADER ── */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}
.header.scrolled {
  background: rgba(15,39,71,.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0,0,0,.25);
  padding: 0;
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-mark {
  width: 36px; height: 36px;
  background: var(--blue);
  color: var(--white);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.5px;
}
.logo-text {
  font-family: var(--font-en);
  font-weight: 800;
  font-size: 18px;
  color: var(--white);
  letter-spacing: 2px;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  color: rgba(255,255,255,.8);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 50px;
  transition: var(--transition);
}
.nav-link:hover { color: var(--white); background: rgba(255,255,255,.1); }
.nav-link--cta {
  background: var(--blue);
  color: var(--white);
  padding: 9px 20px;
  font-weight: 700;
}
.nav-link--cta:hover { background: var(--blue-dark); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 6px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  display: none;
  background: rgba(15,39,71,.98);
  backdrop-filter: blur(12px);
  position: absolute;
  top: 72px; left: 0; right: 0;
  padding: 16px 0 24px;
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}
.mobile-nav.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.mobile-nav .mob-link {
  display: block;
  color: rgba(255,255,255,.85);
  padding: 13px 24px;
  font-size: 15px;
  font-weight: 500;
  border-bottom: 1px solid rgba(255,255,255,.06);
  transition: var(--transition);
}
.mobile-nav .mob-link:hover { color: var(--white); padding-left: 32px; }

/* ── 5. HERO ── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  background: var(--navy);
  overflow: hidden;
}
.hero__canvas {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
/* Animated geometric background */
.hero__canvas::before {
  content: '';
  position: absolute;
  width: 70vmax; height: 70vmax;
  right: -20vmax; top: -20vmax;
  background: radial-gradient(circle, rgba(45,127,249,.12) 0%, transparent 70%);
  animation: pulseGlow 8s ease-in-out infinite alternate;
}
.hero__canvas::after {
  content: '';
  position: absolute;
  width: 50vmax; height: 50vmax;
  left: -10vmax; bottom: -10vmax;
  background: radial-gradient(circle, rgba(45,127,249,.08) 0%, transparent 70%);
  animation: pulseGlow 10s ease-in-out infinite alternate-reverse;
}
@keyframes pulseGlow {
  from { transform: scale(1); opacity: .7; }
  to   { transform: scale(1.15); opacity: 1; }
}

/* Grid lines */
.hero__overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(45,127,249,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45,127,249,.04) 1px, transparent 1px);
  background-size: 80px 80px;
}

.hero__inner {
  position: relative;
  z-index: 2;
  padding-block: 140px 80px;
}
.hero__eyebrow {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeSlideUp .8s .3s forwards;
}
.hero__title {
  font-size: clamp(38px, 6vw, 72px);
  font-weight: 900;
  line-height: 1.15;
  color: var(--white);
  letter-spacing: -1.5px;
  margin-bottom: 28px;
  opacity: 0;
  animation: fadeSlideUp .8s .5s forwards;
}
.hero__title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--blue) 0%, #60afff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__sub {
  font-size: clamp(16px, 2vw, 19px);
  color: rgba(255,255,255,.65);
  line-height: 1.8;
  max-width: 560px;
  margin-bottom: 42px;
  opacity: 0;
  animation: fadeSlideUp .8s .7s forwards;
}
.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeSlideUp .8s .9s forwards;
}

.hero__scroll-hint {
  position: absolute;
  bottom: 36px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,.35);
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: 2px;
  z-index: 2;
  animation: fadeIn 1s 1.5s both;
}
.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, rgba(255,255,255,.3), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: .4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.2); }
}

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ── 6. ABOUT ── */
.about { background: var(--white); }
.about__layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(40px, 6vw, 90px);
  align-items: center;
}
.about__left { max-width: 460px; }
.about__desc {
  color: var(--text-light);
  line-height: 1.9;
  margin-block: 20px 32px;
  font-size: 15px;
}

.values-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.value-card {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 24px;
  background: var(--off-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}
.value-card:hover {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px var(--blue-glow);
  transform: translateX(4px);
}
.value-card__icon {
  width: 44px; height: 44px;
  flex-shrink: 0;
}
.value-card h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 6px;
}
.value-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* ── 7. SERVICES ── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.service-card {
  position: relative;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: var(--transition);
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(45,127,249,.08) 0%, transparent 60%);
  opacity: 0;
  transition: var(--transition);
}
.service-card:hover { border-color: rgba(45,127,249,.4); transform: translateY(-6px); }
.service-card:hover::before { opacity: 1; }

.service-card__num {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  color: rgba(45,127,249,.5);
  margin-bottom: 16px;
}
.service-card__icon {
  width: 48px; height: 48px;
  margin-bottom: 24px;
}
.service-card__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
  line-height: 1.4;
}
.service-card__desc {
  font-size: 14px;
  color: rgba(255,255,255,.5);
  line-height: 1.8;
  margin-bottom: 24px;
}
.service-card__link {
  font-size: 13px;
  font-weight: 600;
  color: var(--blue);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.service-card__link:hover { gap: 10px; }

/* ── 8. PORTFOLIO ── */
.portfolio { background: var(--off-white); }
.portfolio-filter {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.filter-btn {
  padding: 8px 22px;
  border-radius: 50px;
  border: 1.5px solid var(--gray-200);
  background: var(--white);
  color: var(--text-light);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
  box-shadow: 0 4px 16px rgba(45,127,249,.3);
}
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.portfolio-item { border-radius: var(--radius-md); overflow: hidden; }
.portfolio-item.hidden { display: none; }
.portfolio-item__thumb {
  position: relative;
  aspect-ratio: 4/3;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
}
.portfolio-item__tag {
  position: absolute;
  top: 16px; left: 16px;
  background: rgba(45,127,249,.9);
  color: var(--white);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 50px;
  z-index: 2;
}
.portfolio-item__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,39,71,.9) 0%, transparent 50%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  opacity: 0;
  transition: var(--transition);
}
.portfolio-item__thumb:hover .portfolio-item__overlay { opacity: 1; }
.portfolio-item__thumb:hover { transform: scale(1.02); }
.portfolio-item__overlay h3 { color: var(--white); font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.portfolio-item__overlay p { color: rgba(255,255,255,.6); font-size: 13px; }

/* ── 9. STATISTICS ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: clamp(40px, 5vw, 64px) 24px;
  position: relative;
  text-align: center;
}
.stat-item + .stat-item::before {
  content: '';
  position: absolute;
  left: 0; top: 25%; bottom: 25%;
  width: 1px;
  background: rgba(255,255,255,.1);
}
.stat-num {
  font-family: var(--font-en);
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 800;
  color: var(--white);
  letter-spacing: -2px;
  line-height: 1;
  margin-bottom: 12px;
}
.stat-label {
  font-size: 14px;
  color: rgba(255,255,255,.5);
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* ── 10. PROCESS ── */
.process { background: var(--white); }
.process-track { position: relative; margin-top: 20px; }
.process-line {
  position: absolute;
  left: 28px;
  top: 28px; bottom: 28px;
  width: 2px;
  background: linear-gradient(to bottom, var(--blue), rgba(45,127,249,.1));
}
.process-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-left: 20px;
}
.process-step {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  padding: 28px 32px 28px 0;
  border-bottom: 1px solid var(--gray-200);
  transition: var(--transition);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.process-step:last-child { border-bottom: none; }
.process-step:hover { background: var(--off-white); padding-left: 16px; }

.process-step__circle {
  width: 56px; height: 56px;
  background: var(--blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 0 0 6px rgba(45,127,249,.12);
  z-index: 1;
}
.process-step__circle svg { width: 24px; height: 24px; }

.process-step__body { padding-top: 10px; }
.process-step__phase {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--blue);
  text-transform: uppercase;
  margin-bottom: 6px;
  display: block;
}
.process-step__body h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}
.process-step__body p { font-size: 15px; color: var(--text-light); line-height: 1.8; max-width: 580px; }

/* ── 11. CONTACT ── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 28px; }
.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  color: rgba(255,255,255,.8);
}
.contact-info__icon {
  width: 40px; height: 40px;
  background: rgba(45,127,249,.12);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-info__icon svg { width: 20px; height: 20px; }
.contact-info__item strong {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 4px;
}
.contact-info__item p { font-size: 14px; line-height: 1.7; }

.map-placeholder {
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: 8px;
}
.map-placeholder__inner {
  min-height: 180px;
  background: rgba(255,255,255,.03);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 24px;
  text-align: center;
}
.map-placeholder__inner p { color: rgba(255,255,255,.6); font-size: 14px; }
.map-placeholder__inner span { color: rgba(255,255,255,.3); font-size: 12px; }

/* Contact Form */
.contact-form {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 4vw, 44px);
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,.7);
  letter-spacing: 0.3px;
}
.form-group label span { color: var(--blue); }
.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(255,255,255,.06);
  border: 1.5px solid rgba(255,255,255,.1);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--white);
  font-size: 14px;
  transition: var(--transition);
  outline: none;
}
.form-group select option { background: var(--navy); color: var(--white); }
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(255,255,255,.25); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue);
  background: rgba(45,127,249,.06);
  box-shadow: 0 0 0 3px rgba(45,127,249,.15);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-note { font-size: 12px; color: rgba(255,255,255,.3); line-height: 1.6; margin-top: -4px; }
.form-success {
  background: rgba(45,249,150,.12);
  border: 1px solid rgba(45,249,150,.3);
  color: #5ef5b0;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
}

/* ── 12. FOOTER ── */
.footer {
  background: #070f1e;
  padding-top: clamp(48px, 6vw, 80px);
}
.footer__top {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  padding-bottom: clamp(40px, 5vw, 64px);
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.footer__brand .header__logo { margin-bottom: 16px; }
.footer__brand p { font-size: 14px; color: rgba(255,255,255,.4); line-height: 1.8; }
.footer__nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer__col strong {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(255,255,255,.4);
  margin-bottom: 16px;
}
.footer__col li, .footer__col a {
  font-size: 14px;
  color: rgba(255,255,255,.55);
  line-height: 1;
  padding-block: 7px;
  display: block;
  transition: var(--transition);
}
.footer__col a:hover { color: var(--white); padding-left: 4px; }
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 22px;
}
.footer__bottom p { font-size: 13px; color: rgba(255,255,255,.25); }
.footer__legal { display: flex; gap: 24px; }
.footer__legal a { font-size: 13px; color: rgba(255,255,255,.3); transition: var(--transition); }
.footer__legal a:hover { color: rgba(255,255,255,.7); }

/* ── 13. BACK TO TOP ── */
.back-to-top {
  position: fixed;
  bottom: 32px; right: 32px;
  width: 48px; height: 48px;
  background: var(--blue);
  color: var(--white);
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(45,127,249,.4);
  transition: var(--transition);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  z-index: 900;
}
.back-to-top svg { width: 20px; height: 20px; }
.back-to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { background: var(--blue-dark); transform: translateY(-3px); box-shadow: 0 10px 28px rgba(45,127,249,.5); }

/* ── 14. RESPONSIVE ── */
@media (max-width: 1024px) {
  .about__layout { grid-template-columns: 1fr; }
  .about__left { max-width: 100%; }
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item + .stat-item::before { display: none; }
  .contact-layout { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  :root { --section-pad: clamp(48px, 8vw, 72px); }
  .pc-only { display: none; }
  .header__nav { display: none; }
  .hamburger { display: flex; }
  .mobile-nav { display: block; }
  .hero__inner { padding-top: 120px; }
  .hero__actions { flex-direction: column; align-items: flex-start; }
  .hero__scroll-hint { display: none; }
  .portfolio-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .process-line { display: none; }
  .process-step { padding-left: 0; }
  .form-row { grid-template-columns: 1fr; }
  .footer__nav { grid-template-columns: 1fr 1fr; }
  .footer__bottom { flex-direction: column; gap: 12px; text-align: center; }
  .back-to-top { bottom: 20px; right: 20px; }
}

@media (max-width: 480px) {
  .services-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .footer__nav { grid-template-columns: 1fr; }
}

/* ── 15. ACCESSIBILITY ── */
:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
}