/* ============================================================
   단열필름PRO — style.css
   Mobile-first · Premium · Navy / Sky Blue / White
   ============================================================ */

/* ── Variables ──────────────────────────────────────────── */
:root {
  --navy-900: #070e1c;
  --navy-800: #0a1628;
  --navy-700: #0f2040;
  --navy-600: #172b52;
  --navy-500: #1e3a5f;
  --navy-400: #2c4f7c;

  --sky-600:  #0284c7;
  --sky-500:  #0ea5e9;
  --sky-400:  #38bdf8;
  --sky-300:  #7dd3fc;

  --cyan-600: #0891b2;
  --cyan-500: #06b6d4;
  --cyan-400: #22d3ee;

  --mint-500: #10b981;
  --mint-400: #34d399;

  --amber-500: #f59e0b;
  --rose-500:  #f43f5e;
  --purple-500:#8b5cf6;

  --white:     #ffffff;
  --off-white: #f8fafc;
  --slate-50:  #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;

  --gradient-hero:  linear-gradient(160deg, rgba(7,14,28,.82) 0%, rgba(10,22,40,.72) 100%);
  --gradient-dark:  linear-gradient(135deg, #0a1628 0%, #1e3a5f 100%);
  --gradient-blue:  linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
  --gradient-card:  linear-gradient(135deg, #0f2040 0%, #172b52 100%);
  --gradient-cta:   linear-gradient(160deg, rgba(7,14,28,.88) 0%, rgba(6,182,212,.18) 100%);

  --shadow-sm:  0 1px 3px rgba(0,0,0,.10), 0 1px 2px rgba(0,0,0,.06);
  --shadow:     0 4px 6px rgba(0,0,0,.10), 0 2px 4px rgba(0,0,0,.06);
  --shadow-md:  0 8px 20px rgba(0,0,0,.12);
  --shadow-lg:  0 12px 32px rgba(0,0,0,.16);
  --shadow-xl:  0 24px 48px rgba(0,0,0,.22);
  --shadow-glow:0 0 24px rgba(14,165,233,.30);

  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius:    12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --font: 'Noto Sans KR', -apple-system, sans-serif;
  --transition: all .3s cubic-bezier(.4,0,.2,1);
  --transition-slow: all .6s cubic-bezier(.16,1,.3,1);

  --header-h: 68px;
  --container: 1240px;
  --section-py: 96px;
}

/* ── Reset / Base ───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  color: var(--slate-700);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { text-decoration: none; color: inherit; }
button { font-family: var(--font); cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
input, textarea, select {
  font-family: var(--font);
  font-size: 1rem;
  color: var(--slate-700);
}
h1,h2,h3,h4,h5,h6 { line-height: 1.3; word-break: keep-all; }

/* ── Utility ────────────────────────────────────────────── */
.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }
.text-white  { color: var(--white) !important; }
.text-silver { color: var(--slate-400) !important; }
.section     { padding: var(--section-py) 0; }
.section-light      { background: var(--slate-50); }
.section-white      { background: var(--white); }
.section-dark       { background: var(--navy-800); }
.section-navy       { background: var(--navy-700); }
.section-gradient-dark { background: var(--gradient-dark); }
.section-gradient-blue { background: var(--gradient-blue); }

/* ── Section Header ─────────────────────────────────────── */
.section-header { text-align: center; margin-bottom: 56px; }
.section-label {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--sky-500);
  background: rgba(14,165,233,.10);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
}
.section-label.light { color: var(--sky-300); background: rgba(125,211,252,.12); }
.section-header h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.6rem);
  font-weight: 800;
  color: var(--navy-800);
  margin-bottom: 16px;
}
.section-header h2.text-white { color: var(--white); }
.section-desc {
  font-size: 1.05rem;
  color: var(--slate-500);
  max-width: 600px;
  margin: 0 auto;
  word-break: keep-all;
}
.section-desc.text-silver { color: var(--slate-400); }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-full);
  font-size: .95rem;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
  border: 2px solid transparent;
}
.btn-lg { padding: 16px 32px; font-size: 1rem; }
.btn-primary {
  background: var(--gradient-blue);
  color: var(--white);
  box-shadow: 0 4px 18px rgba(6,182,212,.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(6,182,212,.50);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,.5);
}
.btn-outline:hover {
  background: rgba(255,255,255,.12);
  border-color: var(--white);
}
.btn-outline-white {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,.6);
}
.btn-outline-white:hover { background: rgba(255,255,255,.15); }
.btn-ghost {
  background: rgba(255,255,255,.08);
  color: var(--slate-300);
  border-color: rgba(255,255,255,.15);
}
.btn-ghost:hover { background: rgba(255,255,255,.15); color: var(--white); }
.btn-kakao {
  background: #FEE500;
  color: #3A1D1D;
}
.btn-kakao:hover { background: #f5db00; transform: translateY(-2px); }
.btn-outline-sm {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: .85rem;
  font-weight: 600;
  border: 1.5px solid var(--sky-500);
  color: var(--sky-500);
  transition: var(--transition);
  margin-top: auto;
}
.btn-outline-sm:hover { background: var(--sky-500); color: var(--white); }
.btn-full { width: 100%; justify-content: center; }

/* ── HEADER / NAV ───────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: transparent;
  transition: background .4s ease, backdrop-filter .4s ease, box-shadow .4s ease;
}
.site-header.scrolled {
  background: rgba(10,22,40,.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0,0,0,.3);
}
.nav-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-logo a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
}
.logo-icon { font-size: 1.4rem; color: var(--sky-400); }
.logo-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -.01em;
}
.logo-text strong { color: var(--sky-400); }
.nav-menu {
  display: none;
  margin-left: auto;
  gap: 6px;
}
.nav-menu a {
  display: block;
  padding: 8px 14px;
  color: rgba(255,255,255,.85);
  font-size: .9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-menu a:hover { color: var(--white); background: rgba(255,255,255,.1); }
.nav-cta {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}
.btn-nav-contact {
  display: inline-flex;
  align-items: center;
  padding: 9px 20px;
  background: var(--gradient-blue);
  color: var(--white);
  font-size: .88rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: var(--transition);
  box-shadow: 0 2px 12px rgba(6,182,212,.3);
}
.btn-nav-contact:hover { transform: translateY(-1px); box-shadow: 0 4px 18px rgba(6,182,212,.45); }
.btn-nav-tel {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 20px;
  color: var(--white);
  font-size: .88rem;
  font-weight: 700;
  background: var(--gradient-blue);
  border-radius: var(--radius-full);
  box-shadow: 0 2px 12px rgba(6,182,212,.45);
  transition: var(--transition);
}
.btn-nav-tel:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(6,182,212,.60);
}
.nav-hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  margin-left: auto;
}
.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav menu */
.nav-menu.mobile-open {
  display: flex !important;
  flex-direction: column;
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0;
  background: rgba(10,22,40,.98);
  backdrop-filter: blur(16px);
  padding: 16px;
  gap: 4px;
  border-top: 1px solid rgba(255,255,255,.08);
  animation: slideDown .25s ease;
}
@keyframes slideDown { from { opacity:0; transform:translateY(-8px); } to { opacity:1; transform:none; } }

/* ── HERO SLIDER ───────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

/* Slider container */
.hero-slider {
  position: absolute;
  inset: 0;
  z-index: 0;
}

/* Individual slides — fade transition */
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity .9s ease-in-out;
  will-change: opacity;
}
.hero-slide.active { opacity: 1; }
.hero-slide img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center;
}

/* Overlay — left-heavy gradient for text legibility */
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(6,14,32,.82) 0%,
    rgba(6,14,32,.62) 40%,
    rgba(6,14,32,.28) 68%,
    rgba(6,14,32,.08) 100%
  );
}

/* Per-slide content body (overlaid on image+overlay) */
.hero-slide-body {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding-top: calc(var(--header-h) + 44px);
  padding-bottom: 80px;
  overflow: hidden;
}
.hero-slide-body .container { max-width: 600px; }

/* Slide regular copy */
.hero-slide-copy {
  font-size: clamp(.9rem, 1.8vw, 1.1rem);
  font-weight: 400;
  color: rgba(255,255,255,.84);
  line-height: 1.72;
  word-break: keep-all;
  margin-bottom: 28px;
}

/* CTA slide ─ slide 0 */
.hero-cta-main {
  font-size: clamp(1rem, 2.2vw, 1.32rem);
  font-weight: 700;
  color: rgba(255,255,255,.92);
  line-height: 1.6;
  word-break: keep-all;
  margin-bottom: 12px;
}
.hero-cta-desc {
  font-size: clamp(.88rem, 1.5vw, 1.02rem);
  font-weight: 400;
  color: rgba(255,255,255,.72);
  line-height: 1.75;
  word-break: keep-all;
  margin-bottom: 28px;
}
/* 4-button CTA group — wrap neatly on mobile */
.hero-cta-4 { gap: 10px; }
.hero-cta-4 .btn { min-width: 0; }

/* Eyebrow */
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--sky-300);
}
.hero-eyebrow-dot {
  width: 7px; height: 7px;
  background: var(--sky-400);
  border-radius: 50%;
  flex-shrink: 0;
  animation: heroPulse 2.5s ease infinite;
}
@keyframes heroPulse {
  0%,100% { opacity: 1; transform: scale(1); box-shadow: 0 0 0 0 rgba(56,189,248,.45); }
  50%      { opacity: .65; transform: scale(1.3); box-shadow: 0 0 0 5px rgba(56,189,248,0); }
}

/* Title */
.hero-title {
  font-size: clamp(1.9rem, 5.5vw, 3.6rem);
  font-weight: 900;
  color: var(--white);
  letter-spacing: -.02em;
  margin-bottom: 16px;
  line-height: 1.12;
  text-shadow: 0 2px 16px rgba(0,0,0,.45);
}

/* Per-slide copy */
.hero-copy-wrap {
  position: relative;
  min-height: 78px;
  margin-bottom: 28px;
}
.hero-copy {
  position: absolute;
  inset: 0;
  font-size: clamp(.9rem, 1.8vw, 1.1rem);
  font-weight: 400;
  color: rgba(255,255,255,.82);
  line-height: 1.72;
  word-break: keep-all;
  opacity: 0;
  transform: translateY(9px);
  transition: opacity .7s ease, transform .7s ease;
  pointer-events: none;
}
.hero-copy.active {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

/* CTA buttons */
.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* Feature badges */
.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,.11);
}
.hero-feat {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius-full);
  color: rgba(255,255,255,.80);
  font-size: .71rem;
  font-weight: 600;
  letter-spacing: .025em;
  white-space: nowrap;
}
.hero-feat i { color: var(--sky-400); font-size: .66rem; }

/* Arrows */
.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,.12);
  border: 1.5px solid rgba(255,255,255,.25);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--white);
  font-size: .85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.hero-arrow:hover {
  background: rgba(255,255,255,.26);
  border-color: rgba(255,255,255,.55);
  transform: translateY(-50%) scale(1.08);
}
.hero-arrow-prev { left: 12px; }
.hero-arrow-next { right: 12px; }

/* Dots */
.hero-dots {
  position: absolute;
  bottom: 48px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,.36);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: all .35s ease;
}
.hero-dot.active {
  width: 26px;
  border-radius: 4px;
  background: rgba(255,255,255,.90);
}
.hero-dot:hover:not(.active) { background: rgba(255,255,255,.60); }

/* Scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 18px;
  left: 50%;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,.42);
  font-size: .68rem;
  animation: bounce 2s infinite;
}
@keyframes bounce {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(6px); }
}

/* ── PROBLEMS ──────────────────────────────────────────────── */
.problems-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.problem-card {
  background: var(--gradient-card);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: var(--transition);
}
.problem-card:hover { transform: translateY(-4px); border-color: rgba(14,165,233,.3); }
.problem-icon {
  width: 52px; height: 52px;
  border-radius: var(--radius);
  background: rgba(14,165,233,.12);
  border: 1px solid rgba(14,165,233,.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--sky-400);
}
.problem-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--white); }
.problem-card p  { font-size: .9rem; color: var(--slate-400); line-height: 1.6; }

/* ── SOLUTION ─────────────────────────────────────────────── */
.solution-layout {
  display: grid;
  gap: 48px;
  align-items: center;
}
.solution-text .section-label { margin-bottom: 14px; }
.solution-text h2 {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--navy-800);
  margin-bottom: 20px;
}
.solution-text p { color: var(--slate-600); margin-bottom: 16px; word-break: keep-all; }
.solution-note {
  font-size: .88rem;
  color: var(--slate-400);
  padding: 12px 16px;
  background: var(--slate-100);
  border-left: 3px solid var(--sky-500);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 24px !important;
}
.solution-points {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 32px;
}
.solution-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .95rem;
  font-weight: 500;
  color: var(--slate-700);
}
.solution-points li i { color: var(--mint-500); font-size: .9rem; }
.solution-image { position: relative; }
.solution-image img {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}
.solution-img-badge {
  position: absolute;
  bottom: -16px;
  right: 24px;
  background: var(--navy-800);
  border: 1.5px solid rgba(14,165,233,.3);
  border-radius: var(--radius-lg);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow-lg);
}
.solution-img-badge i { font-size: 1.4rem; color: var(--mint-400); }
.solution-img-badge span { font-size: .85rem; font-weight: 600; color: var(--white); line-height: 1.4; }
.solution-img-badge small { font-size: .72rem; color: var(--slate-400); font-weight: 400; }

/* ── EFFECTS GRID ─────────────────────────────────────────── */
.effects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.effect-card {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.effect-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.effect-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  order: -1;
}
.effect-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  margin: 20px 20px 0;
}
.effect-icon-red    { background: rgba(244,63,94,.1);  color: #f43f5e; }
.effect-icon-purple { background: rgba(139,92,246,.1); color: #8b5cf6; }
.effect-icon-yellow { background: rgba(245,158,11,.1); color: #f59e0b; }
.effect-icon-navy   { background: rgba(14,165,233,.1); color: var(--sky-500); }
.effect-icon-green  { background: rgba(16,185,129,.1); color: var(--mint-500); }
.effect-icon-blue   { background: rgba(6,182,212,.1);  color: var(--cyan-500); }
.effect-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--navy-800); padding: 12px 20px 8px; }
.effect-card p  { font-size: .88rem; color: var(--slate-500); padding: 0 20px 20px; line-height: 1.6; }

/* ── TARGETS GRID ─────────────────────────────────────────── */
.targets-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.target-card {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: var(--transition);
}
.target-card:hover {
  background: rgba(14,165,233,.08);
  border-color: rgba(14,165,233,.25);
  transform: translateY(-3px);
}
.target-card-wide { border-color: rgba(14,165,233,.3); background: rgba(14,165,233,.06); }
.target-icon { font-size: 1.6rem; color: var(--sky-400); }
.target-card h3 { font-size: 1rem; font-weight: 700; color: var(--white); }
.target-card p  { font-size: .88rem; color: var(--slate-400); line-height: 1.6; }

/* ── PRODUCTS GRID ────────────────────────────────────────── */
.products-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.product-card {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: var(--transition);
  position: relative;
  box-shadow: var(--shadow-sm);
}
.product-card:hover { border-color: var(--sky-500); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.product-badge {
  position: absolute;
  top: 16px; right: 16px;
  font-size: .72rem;
  font-weight: 700;
  color: var(--white);
  background: var(--gradient-blue);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}
.product-icon { font-size: 1.8rem; color: var(--sky-500); }
.product-card h3 { font-size: 1.1rem; font-weight: 700; color: var(--navy-800); }
.product-recommend {
  font-size: .82rem;
  color: var(--slate-500);
  display: flex;
  align-items: center;
  gap: 6px;
}
.product-recommend i { color: var(--sky-500); font-size: .75rem; }
.product-features {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.product-features li {
  font-size: .88rem;
  color: var(--slate-600);
  padding-left: 14px;
  position: relative;
}
.product-features li::before {
  content: '·';
  position: absolute;
  left: 4px;
  color: var(--sky-500);
  font-weight: 700;
}
.product-tip {
  font-size: .82rem;
  color: var(--slate-400);
  background: var(--slate-50);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--sky-400);
}

/* ── EXPERTISE ────────────────────────────────────────────── */
.expertise-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.expertise-item {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}
.expertise-item:hover { background: rgba(14,165,233,.07); border-color: rgba(14,165,233,.2); }
.expertise-num {
  font-size: 2rem;
  font-weight: 900;
  color: rgba(14,165,233,.2);
  line-height: 1;
  min-width: 44px;
}
.expertise-content h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.expertise-content h3 i { color: var(--sky-400); }
.expertise-content p { font-size: .88rem; color: var(--slate-400); line-height: 1.6; }

/* ── BEFORE / AFTER ─────────────────────────────────────── */
.ba-tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-bottom: 32px;
}
.ba-tab {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-size: .9rem;
  font-weight: 600;
  color: var(--slate-500);
  border: 1.5px solid var(--slate-200);
  transition: var(--transition);
}
.ba-tab.active, .ba-tab:hover {
  background: var(--gradient-blue);
  color: var(--white);
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(6,182,212,.3);
}
.ba-wrapper { display: flex; flex-direction: column; gap: 32px; }
.ba-slider {
  position: relative;
  width: 100%;
  height: 320px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  cursor: ew-resize;
  user-select: none;
  box-shadow: var(--shadow-xl);
}
.ba-after, .ba-before {
  position: absolute;
  top: 0; bottom: 0;
  width: 100%;
}
.ba-after-visual, .ba-before-visual {
  width: 100%; height: 100%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  padding: 24px;
  gap: 10px;
}
.ba-after-visual {
  background: linear-gradient(135deg, #0f2040 0%, #0ea5e9 80%, #06b6d4 100%);
}
.ba-before-visual.ba-visual-office-before {
  background: linear-gradient(135deg, #7c3a0a 0%, #f97316 60%, #fbbf24 100%);
}
.ba-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: .8rem;
  font-weight: 700;
  color: var(--white);
}
.ba-label-after  { background: rgba(16,185,129,.85); }
.ba-label-before { background: rgba(239,68,68,.85); }
.ba-text { display: flex; flex-direction: column; gap: 6px; }
.ba-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: .78rem;
  font-weight: 600;
  color: var(--white);
}
.tag-good { background: rgba(16,185,129,.75); }
.tag-bad  { background: rgba(239,68,68,.75); }
.ba-before {
  width: 50%;
  overflow: hidden;
}
.ba-before-visual {
  width: 200%; /* JS updates this on drag */
}
.ba-handle {
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  pointer-events: none;
  z-index: 10;
}
.ba-handle-line {
  width: 3px;
  height: 100%;
  background: var(--white);
  box-shadow: 0 0 12px rgba(0,0,0,.4);
}
.ba-handle-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px; height: 44px;
  background: var(--white);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--navy-800);
  font-size: 1rem;
  box-shadow: var(--shadow-md);
  pointer-events: all;
  cursor: ew-resize;
}
.ba-info-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: center;
}
.ba-info-card {
  padding: 20px;
  border-radius: var(--radius-lg);
}
.ba-info-card.bad  { background: #fff5f5; border: 1px solid #fee2e2; }
.ba-info-card.good { background: #f0fdf4; border: 1px solid #bbf7d0; }
.ba-info-card h4 {
  font-size: .9rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.ba-info-card.bad  h4 { color: #dc2626; }
.ba-info-card.good h4 { color: #16a34a; }
.ba-info-card li {
  font-size: .82rem;
  color: var(--slate-600);
  padding: 3px 0;
  padding-left: 12px;
  position: relative;
}
.ba-info-card.bad  li::before { content: '✕'; position: absolute; left: 0; color: #ef4444; font-size: .7rem; }
.ba-info-card.good li::before { content: '✓'; position: absolute; left: 0; color: #22c55e; font-size: .7rem; }
.ba-info-arrow { font-size: 1.2rem; color: var(--slate-400); text-align: center; }

/* ── GALLERY ─────────────────────────────────────────────── */
.gallery-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 36px;
}
.filter-btn {
  padding: 9px 20px;
  border-radius: var(--radius-full);
  font-size: .85rem;
  font-weight: 600;
  color: var(--slate-500);
  border: 1.5px solid var(--slate-200);
  background: var(--white);
  transition: var(--transition);
}
.filter-btn.active, .filter-btn:hover {
  background: var(--navy-800);
  color: var(--white);
  border-color: var(--navy-800);
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  aspect-ratio: 4/3;
  cursor: pointer;
  transition: var(--transition);
}
.gallery-item.hidden { display: none; }
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.gallery-item:hover img { transform: scale(1.06); }
.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,22,40,.85) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 16px;
  opacity: 0;
  transition: var(--transition);
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-type {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  color: var(--sky-300);
  background: rgba(14,165,233,.2);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 6px;
}
.gallery-desc {
  font-size: .8rem;
  color: rgba(255,255,255,.9);
  line-height: 1.4;
}
.gallery-more { text-align: center; margin-top: 36px; }

/* ── PROCESS TIMELINE ────────────────────────────────────── */
.process-timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  position: relative;
}
.process-step {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}
.process-step-num {
  font-size: 2.4rem;
  font-weight: 900;
  color: rgba(255,255,255,.12);
  line-height: 1;
  min-width: 52px;
}
.process-step-content {
  flex: 1;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  transition: var(--transition);
}
.process-step:hover .process-step-content {
  background: rgba(255,255,255,.09);
  border-color: rgba(255,255,255,.15);
}
.process-step-icon {
  font-size: 1.4rem;
  color: var(--sky-400);
  margin-bottom: 10px;
}
.process-step-content h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 6px;
}
.process-step-content p { font-size: .88rem; color: var(--slate-400); line-height: 1.6; }

/* ── CONTACT FORM ────────────────────────────────────────── */
.contact-layout {
  display: grid;
  gap: 48px;
  align-items: start;
}
.contact-info .section-label { margin-bottom: 14px; }
.contact-info h2 {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  font-weight: 800;
  color: var(--navy-800);
  margin-bottom: 16px;
}
.contact-info > p { color: var(--slate-500); margin-bottom: 28px; }
.contact-checklist {
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 28px;
}
.contact-checklist h3 {
  font-size: .9rem;
  font-weight: 700;
  color: var(--navy-800);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.contact-checklist h3::before {
  content: '';
  width: 4px; height: 16px;
  background: var(--gradient-blue);
  border-radius: 2px;
}
.contact-checklist li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .88rem;
  color: var(--slate-600);
  padding: 6px 0;
  border-bottom: 1px solid var(--slate-100);
}
.contact-checklist li:last-child { border-bottom: none; }
.contact-checklist li i { color: var(--sky-500); font-size: .85rem; }
.contact-direct { display: flex; flex-direction: column; gap: 10px; }
.contact-direct h3 { font-size: .9rem; font-weight: 700; color: var(--navy-800); margin-bottom: 4px; }
.contact-direct-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  border-radius: var(--radius);
  font-size: .95rem;
  font-weight: 600;
  transition: var(--transition);
}
.contact-direct-btn.tel {
  background: var(--navy-800);
  color: var(--white);
}
.contact-direct-btn.tel:hover { background: var(--navy-600); }
.contact-direct-btn.kakao {
  background: #FEE500;
  color: #3A1D1D;
}
.contact-direct-btn.kakao:hover { background: #f5db00; }
.contact-form-wrap {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-xl);
  padding: 36px;
  box-shadow: var(--shadow-md);
}
.form-row { display: grid; grid-template-columns: 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.contact-form > .form-group + .form-group,
.contact-form > .form-row  + .form-group,
.contact-form > .form-group + .form-row  { margin-top: 16px; }
.form-row .form-group + .form-group { margin-top: 0; }
.form-group label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--slate-700);
}
.required { color: var(--rose-500); }
.form-hint { font-weight: 400; color: var(--slate-400); font-size: .78rem; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--slate-200);
  border-radius: var(--radius);
  background: var(--slate-50);
  font-size: .95rem;
  color: var(--slate-700);
  transition: var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--sky-500);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(14,165,233,.12);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.file-upload-area {
  position: relative;
  border: 2px dashed var(--slate-200);
  border-radius: var(--radius);
  background: var(--slate-50);
  transition: var(--transition);
  cursor: pointer;
}
.file-upload-area:hover { border-color: var(--sky-500); background: rgba(14,165,233,.04); }
.file-upload-area input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}
.file-upload-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 28px;
  color: var(--slate-400);
  pointer-events: none;
}
.file-upload-placeholder i { font-size: 2rem; color: var(--sky-400); }
.file-upload-placeholder span { font-size: .9rem; }
.file-upload-placeholder small { font-size: .78rem; }
.form-privacy { margin-top: 20px !important; }
.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  font-size: .88rem;
  color: var(--slate-600);
}
.checkbox-label input[type="checkbox"] { display: none; }
.checkbox-custom {
  width: 18px; height: 18px;
  min-width: 18px;
  border: 1.5px solid var(--slate-300);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  margin-top: 2px;
}
.checkbox-label input:checked + .checkbox-custom {
  background: var(--sky-500);
  border-color: var(--sky-500);
}
.checkbox-label input:checked + .checkbox-custom::after {
  content: '✓';
  color: var(--white);
  font-size: .7rem;
  font-weight: 700;
}
.privacy-detail-btn {
  color: var(--sky-500);
  text-decoration: underline;
  font-size: inherit;
  cursor: pointer;
}
.privacy-detail {
  font-size: .8rem;
  color: var(--slate-500);
  background: var(--slate-50);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-top: 8px;
  border: 1px solid var(--slate-200);
}
.form-note {
  text-align: center;
  font-size: .8rem;
  color: var(--slate-400);
  margin-top: 12px;
}
.contact-form .btn-full { margin-top: 8px; }

/* ── TRUST ──────────────────────────────────────────────── */
.trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.trust-item {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.trust-item:hover {
  border-color: var(--sky-500);
  box-shadow: 0 8px 24px rgba(14,165,233,.12);
  transform: translateY(-3px);
}
.trust-icon {
  width: 52px; height: 52px;
  background: linear-gradient(135deg, rgba(14,165,233,.1), rgba(6,182,212,.1));
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  color: var(--sky-500);
}
.trust-item h3 { font-size: 1rem; font-weight: 700; color: var(--navy-800); }
.trust-item p  { font-size: .88rem; color: var(--slate-500); line-height: 1.6; }

/* ── TESTIMONIALS ────────────────────────────────────────── */
.testimonials-track-wrap { position: relative; overflow: hidden; }
.testimonials-track {
  display: flex;
  gap: 20px;
  transition: transform .5s cubic-bezier(.25,.46,.45,.94);
  will-change: transform;
}
.testimonial-card {
  min-width: 300px;
  flex-shrink: 0;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.testimonial-quote { font-size: 1.5rem; color: var(--sky-500); opacity: .5; }
.testimonial-card p { font-size: .9rem; color: var(--slate-300); line-height: 1.7; flex: 1; }
.testimonial-info { display: flex; flex-direction: column; gap: 2px; }
.testimonial-info strong { font-size: .88rem; font-weight: 700; color: var(--white); }
.testimonial-info span  { font-size: .78rem; color: var(--slate-500); }
.testimonials-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 28px;
}
.t-nav-btn {
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  border: 1.5px solid rgba(255,255,255,.2);
  color: var(--white);
  font-size: .9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.t-nav-btn:hover { background: rgba(14,165,233,.2); border-color: var(--sky-500); }
.t-dots { display: flex; gap: 6px; }
.t-dot {
  width: 6px; height: 6px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,.25);
  transition: var(--transition);
  cursor: pointer;
}
.t-dot.active { background: var(--sky-400); width: 20px; }

/* ── FAQ ─────────────────────────────────────────────────── */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  border: 1.5px solid var(--slate-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: var(--sky-500); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  text-align: left;
  background: var(--white);
  transition: var(--transition);
}
.faq-question:hover { background: var(--slate-50); }
.faq-item.open .faq-question { background: var(--slate-50); }
.faq-question span:first-child {
  font-size: .95rem;
  font-weight: 600;
  color: var(--navy-800);
  flex: 1;
}
.faq-icon {
  width: 24px; height: 24px;
  border-radius: var(--radius-full);
  background: var(--slate-100);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  transition: var(--transition);
}
.faq-icon::before, .faq-icon::after {
  content: '';
  position: absolute;
  background: var(--slate-500);
  border-radius: 1px;
  transition: var(--transition);
}
.faq-icon::before { width: 10px; height: 2px; }
.faq-icon::after  { width: 2px;  height: 10px; }
.faq-item.open .faq-icon { background: var(--sky-500); }
.faq-item.open .faq-icon::before { background: var(--white); }
.faq-item.open .faq-icon::after  { background: var(--white); transform: rotate(90deg); opacity: 0; }
.faq-answer {
  padding: 0 24px 20px;
  background: var(--white);
}
.faq-answer p { font-size: .9rem; color: var(--slate-600); line-height: 1.7; word-break: keep-all; }

/* ── FINAL CTA ────────────────────────────────────────────── */
.section-cta {
  position: relative;
  padding: 100px 0;
  overflow: hidden;
}
.cta-bg { position: absolute; inset: 0; z-index: 0; }
.cta-bg img { width: 100%; height: 100%; object-fit: cover; }
.cta-overlay {
  position: absolute;
  inset: 0;
  background: var(--gradient-cta);
}
.cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}
.cta-content h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.8rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.25;
}
.cta-content p { color: var(--slate-300); font-size: 1.05rem; }
.cta-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 8px;
}

/* ── FOOTER ──────────────────────────────────────────────── */
.site-footer {
  background: var(--navy-900);
  color: var(--slate-400);
  padding: 64px 0 0;
}
.footer-top {
  display: grid;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.07);
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--white);
  font-size: 1.15rem;
  font-weight: 700;
}
.footer-brand p {
  font-size: .88rem;
  line-height: 1.7;
  color: var(--slate-500);
  margin-bottom: 18px;
}
.footer-contact { display: flex; flex-direction: column; gap: 8px; }
.footer-contact a {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .88rem;
  color: var(--slate-400);
  transition: var(--transition);
}
.footer-contact a:hover { color: var(--sky-400); }
.footer-nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer-nav-col h4 {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--slate-500);
  margin-bottom: 14px;
}
.footer-nav-col li + li { margin-top: 8px; }
.footer-nav-col a {
  font-size: .85rem;
  color: var(--slate-500);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}
.footer-nav-col a:hover { color: var(--sky-400); }
.footer-bottom {
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-keywords {
  font-size: .72rem;
  color: var(--slate-600);
  line-height: 1.8;
}
.footer-bottom-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.footer-copy { font-size: .8rem; color: var(--slate-600); }
.footer-disclaimer { font-size: .75rem; color: var(--slate-700); }

/* ── MOBILE CTA BAR ──────────────────────────────────────── */
.mobile-cta-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 900;
  background: var(--navy-800);
  border-top: 1px solid rgba(255,255,255,.08);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  box-shadow: 0 -4px 20px rgba(0,0,0,.3);
  transition: transform .3s ease;
}
.mcta-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 10px 4px 12px;
  font-size: .7rem;
  font-weight: 600;
  color: var(--slate-400);
  transition: var(--transition);
}
.mcta-btn:active { background: rgba(255,255,255,.06); }
.mcta-btn i { font-size: 1.1rem; }
.mcta-btn.mcta-tel    { color: var(--sky-400); }
.mcta-btn.mcta-sms    { color: var(--cyan-400); }
.mcta-btn.mcta-kakao  { color: #FEE500; }
.mcta-btn.mcta-estimate {
  color: var(--white);
  background: var(--gradient-blue);
}
.mobile-cta-bar.hidden-bar { transform: translateY(100%); }

/* ── FLOATING CONTACT ────────────────────────────────────── */
.float-contact {
  position: fixed;
  right: 20px;
  bottom: 92px;
  z-index: 800;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.float-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  font-size: .6rem;
  font-weight: 700;
  letter-spacing: -.01em;
  box-shadow: 0 4px 18px rgba(0,0,0,.22);
  transition: var(--transition);
  color: var(--white);
}
.float-btn i { font-size: 1.15rem; }
.float-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,.30);
}
.float-tel  { background: var(--sky-500); }
.float-tel:hover { background: var(--sky-600); }
.float-sms  { background: var(--mint-500); }
.float-sms:hover { background: #059669; }
.float-kakao {
  background: #FEE500;
  color: #3A1D1D;
}
.float-kakao:hover { background: #f5db00; }

/* 모바일: 하단 CTA 바가 이미 있으므로 숨김 */
@media (max-width: 767px) {
  .float-contact { display: none; }
}

/* ── CONTACT SOLO (form removed) ───────────────────────────── */
.contact-solo {
  max-width: 640px;
  margin: 0 auto;
}
.contact-solo-desc {
  font-size: 1rem;
  color: var(--slate-500);
  margin-bottom: 28px;
}

/* ── BACK TO TOP ─────────────────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: calc(72px + 16px);
  right: 16px;
  z-index: 800;
  width: 44px; height: 44px;
  background: var(--navy-800);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-full);
  color: var(--white);
  font-size: .9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
}
.back-to-top.visible {
  opacity: 1;
  pointer-events: all;
  transform: none;
}
.back-to-top:hover { background: var(--sky-600); }

/* ── SCROLL REVEAL ANIMATION ──────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .6s cubic-bezier(.16,1,.3,1), transform .6s cubic-bezier(.16,1,.3,1);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}
.reveal:nth-child(2) { transition-delay: .07s; }
.reveal:nth-child(3) { transition-delay: .14s; }
.reveal:nth-child(4) { transition-delay: .21s; }
.reveal:nth-child(5) { transition-delay: .28s; }
.reveal:nth-child(6) { transition-delay: .35s; }
.reveal:nth-child(7) { transition-delay: .42s; }

/* ── RESPONSIVE — 640px ──────────────────────────────────── */
@media (min-width: 640px) {
  :root { --section-py: 104px; }
  .problems-grid       { grid-template-columns: repeat(2, 1fr); }
  .effects-grid        { grid-template-columns: repeat(2, 1fr); }
  .targets-grid        { grid-template-columns: repeat(2, 1fr); }
  .products-grid       { grid-template-columns: repeat(2, 1fr); }
  .expertise-grid      { grid-template-columns: repeat(2, 1fr); }
  .trust-grid          { grid-template-columns: repeat(2, 1fr); }
  .form-row            { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid        { grid-template-columns: repeat(3, 1fr); gap: 14px; }
  .footer-top          { grid-template-columns: 1fr auto; }
  .target-card-wide    { grid-column: 1 / -1; flex-direction: row; align-items: center; }
  .ba-slider { height: 400px; }
  /* Hero */
  .hero-content { max-width: 600px; }
  .hero-arrow { width: 50px; height: 50px; font-size: .95rem; }
  .hero-arrow-prev { left: 20px; }
  .hero-arrow-next { right: 20px; }
  .hero-dots { bottom: 52px; }
  .hero-copy-wrap { min-height: 72px; }
}

/* ── RESPONSIVE — 768px ──────────────────────────────────── */
@media (min-width: 768px) {
  .nav-hamburger { display: none; }
  .nav-menu { display: flex; }
  .nav-cta  { display: flex; }
  .mobile-cta-bar { display: none; }
  .back-to-top { bottom: 24px; right: 86px; }
  .float-contact { right: 24px; bottom: 88px; }
  .solution-layout { grid-template-columns: 1fr 1fr; }
  .contact-layout  { grid-template-columns: 1fr 1fr; }
  .process-timeline { grid-template-columns: repeat(2, 1fr); }
  .ba-slider { height: 480px; }
  .footer-bottom-row { flex-direction: row; justify-content: space-between; align-items: center; }
}

/* ── RESPONSIVE — 1024px ─────────────────────────────────── */
@media (min-width: 1024px) {
  :root { --section-py: 120px; }
  .problems-grid  { grid-template-columns: repeat(3, 1fr); }
  .effects-grid   { grid-template-columns: repeat(3, 1fr); }
  .products-grid  { grid-template-columns: repeat(3, 1fr); }
  .expertise-grid { grid-template-columns: repeat(3, 1fr); }
  .targets-grid   { grid-template-columns: repeat(3, 1fr); }
  .trust-grid     { grid-template-columns: repeat(3, 1fr); }
  .process-timeline { grid-template-columns: repeat(3, 1fr); }
  .gallery-grid   { grid-template-columns: repeat(4, 1fr); }
  .testimonial-card { min-width: 360px; }
}

/* ── RESPONSIVE — 1280px ─────────────────────────────────── */
@media (min-width: 1280px) {
  .container { padding: 0 40px; }
  .targets-grid { grid-template-columns: repeat(4, 1fr); }
  .target-card-wide { grid-column: auto; flex-direction: column; }
  .solution-layout { grid-template-columns: 1fr 1.1fr; gap: 72px; }
  .contact-layout  { grid-template-columns: 1fr 1.1fr; gap: 72px; }
}

/* ── Accessibility ─────────────────────────────────────────── */
:focus-visible { outline: 2px solid var(--sky-400); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
}