/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary:    #0d2b6e;
  --primary-light: #1a4db8;
  --secondary:  #1a6fa8;
  --accent:     #25d366;
  --accent-wa:  #128c7e;
  --gold:       #f0a500;
  --dark:       #0a1628;
  --gray:       #f5f7fb;
  --text:       #2c3e50;
  --text-light: #6b7c93;
  --white:      #ffffff;
  --shadow:     0 8px 32px rgba(13,43,110,.13);
  --radius:     16px;
  --transition: .35s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }
body {
  font-family: 'Cairo', sans-serif;
  color: var(--text);
  background: var(--white);
  overflow-x: hidden;
  direction: rtl;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

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

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--gray); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(13,43,110,.08);
  transition: var(--transition);
}
.header.scrolled {
  background: rgba(255,255,255,.98);
  box-shadow: 0 4px 30px rgba(13,43,110,.15);
}
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .9rem 0;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: .75rem;
}
.logo-img {
  width: 52px;
  height: 52px;
  object-fit: contain;
  filter: drop-shadow(0 2px 6px rgba(13,43,110,.2));
}
.logo-text { display: flex; flex-direction: column; }
.logo-main {
  font-size: 1.05rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1.2;
}
.logo-sub {
  font-size: .72rem;
  color: var(--text-light);
}
.nav-links {
  display: flex;
  gap: .25rem;
}
.nav-link {
  padding: .5rem .9rem;
  border-radius: 8px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--text);
  transition: var(--transition);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 50%; right: 50%;
  height: 2px;
  background: var(--primary-light);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-link:hover::after,
.nav-link.active::after { left: 10%; right: 10%; }
.nav-link:hover, .nav-link.active { color: var(--primary); }

.btn-call-nav {
  display: flex;
  align-items: center;
  gap: .4rem;
  background: var(--primary);
  color: var(--white);
  padding: .55rem 1.2rem;
  border-radius: 50px;
  font-size: .88rem;
  font-weight: 700;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-call-nav:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(13,43,110,.3);
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 26px; height: 2.5px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg-slider {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1.2s ease;
}
.hero-slide.active { opacity: 1; }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,22,40,.88) 0%, rgba(13,43,110,.72) 50%, rgba(26,111,168,.55) 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 8rem 0 4rem;
  color: var(--white);
  max-width: 700px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  background: rgba(240,165,0,.18);
  border: 1px solid rgba(240,165,0,.4);
  color: var(--gold);
  padding: .4rem 1rem;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  animation: fadeInDown .8s ease;
}
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: .8rem;
  animation: fadeInUp .8s ease .1s both;
}
.hero-title .highlight {
  color: var(--gold);
  text-shadow: 0 0 30px rgba(240,165,0,.4);
}
.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight: 600;
  color: rgba(255,255,255,.9);
  margin-bottom: .5rem;
  animation: fadeInUp .8s ease .2s both;
}
.hero-desc {
  font-size: 1rem;
  color: rgba(255,255,255,.7);
  margin-bottom: 2rem;
  animation: fadeInUp .8s ease .3s both;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
  animation: fadeInUp .8s ease .4s both;
}

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--white);
  padding: .85rem 2rem;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 700;
  font-family: 'Cairo', sans-serif;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 6px 24px rgba(13,43,110,.35);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 32px rgba(13,43,110,.45);
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
}
.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: linear-gradient(135deg, #25d366, #128c7e);
  color: var(--white);
  padding: .85rem 2rem;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 700;
  transition: var(--transition);
  box-shadow: 0 6px 24px rgba(37,211,102,.35);
}
.btn-whatsapp:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 32px rgba(37,211,102,.5);
}

/* Pulse animation for hero buttons */
.pulse-btn {
  animation: pulse 2.5s infinite;
}
.pulse-btn:nth-child(2) { animation-delay: .4s; }
@keyframes pulse {
  0%, 100% { box-shadow: 0 6px 24px rgba(13,43,110,.35); }
  50% { box-shadow: 0 6px 36px rgba(13,43,110,.6), 0 0 0 8px rgba(13,43,110,.08); }
}
.btn-whatsapp.pulse-btn {
  animation: pulseWa 2.5s infinite;
}
@keyframes pulseWa {
  0%, 100% { box-shadow: 0 6px 24px rgba(37,211,102,.35); }
  50% { box-shadow: 0 6px 36px rgba(37,211,102,.6), 0 0 0 8px rgba(37,211,102,.1); }
}

/* ===== HERO STATS ===== */
.hero-stats {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  animation: fadeInUp .8s ease .5s both;
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.stat-num {
  font-size: 2rem;
  font-weight: 900;
  color: var(--gold);
  line-height: 1;
}
.stat-plus {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gold);
}
.stat-label {
  font-size: .78rem;
  color: rgba(255,255,255,.75);
  margin-top: .2rem;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,.25);
}
.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}
.hero-scroll a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border: 2px solid rgba(255,255,255,.4);
  border-radius: 50%;
  color: var(--white);
  font-size: 1rem;
  animation: bounce 2s infinite;
  transition: var(--transition);
}
.hero-scroll a:hover { background: rgba(255,255,255,.15); }
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ===== SECTION HEADER ===== */
.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}
.section-header.light .section-title,
.section-header.light .section-desc { color: var(--white); }
.section-tag {
  display: inline-block;
  background: rgba(13,43,110,.08);
  color: var(--primary);
  padding: .35rem 1.1rem;
  border-radius: 50px;
  font-size: .82rem;
  font-weight: 700;
  margin-bottom: .75rem;
  letter-spacing: .03em;
}
.section-header.light .section-tag {
  background: rgba(255,255,255,.15);
  color: var(--gold);
}
.section-title {
  font-size: clamp(1.7rem, 3.5vw, 2.5rem);
  font-weight: 900;
  color: var(--primary);
  margin-bottom: .75rem;
  line-height: 1.3;
}
.section-desc {
  font-size: 1rem;
  color: var(--text-light);
  max-width: 560px;
  margin-inline: auto;
}

/* ===== SERVICES ===== */
.services {
  padding: 6rem 0;
  background: var(--gray);
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.8rem;
}
.service-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
}
.service-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px rgba(13,43,110,.18);
}
.service-icon-wrap {
  position: absolute;
  top: 1rem; right: 1rem;
  width: 46px; height: 46px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--white);
  z-index: 2;
  box-shadow: 0 4px 12px rgba(0,0,0,.2);
}
.service-icon-wrap.ac      { background: linear-gradient(135deg, #1a6fa8, #0d2b6e); }
.service-icon-wrap.electric{ background: linear-gradient(135deg, #f0a500, #e07b00); }
.service-icon-wrap.plumbing{ background: linear-gradient(135deg, #1a4db8, #0d2b6e); }
.service-icon-wrap.tank    { background: linear-gradient(135deg, #25d366, #128c7e); }

.service-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform .5s ease;
}
.service-card:hover .service-img { transform: scale(1.05); }
.service-body {
  padding: 1.4rem;
}
.service-body h3 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: .5rem;
}
.service-body p {
  font-size: .9rem;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 1rem;
}
.service-cta {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  color: var(--primary-light);
  font-weight: 700;
  font-size: .88rem;
  transition: var(--transition);
  border-bottom: 2px solid transparent;
}
.service-cta:hover {
  color: var(--primary);
  border-bottom-color: var(--primary);
  gap: .7rem;
}

/* ===== ABOUT ===== */
.about {
  padding: 6rem 0;
  background: var(--white);
}
.about-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.about-images {
  position: relative;
}
.about-img-main {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(13,43,110,.2);
  transition: var(--transition);
}
.about-img-main:hover { transform: scale(1.02); }
.about-badge-float {
  position: absolute;
  bottom: -1.5rem;
  left: -1.5rem;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--white);
  padding: 1rem 1.4rem;
  border-radius: 14px;
  display: flex;
  align-items: center;
  gap: .5rem;
  font-weight: 700;
  font-size: .95rem;
  box-shadow: 0 8px 24px rgba(13,43,110,.35);
}
.about-badge-float i { font-size: 1.4rem; color: var(--gold); }
.about-content { padding-right: 1rem; }
.about-text {
  font-size: .97rem;
  color: var(--text-light);
  line-height: 1.9;
  margin-bottom: 1rem;
}
.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
  margin: 1.5rem 0 2rem;
}
.feature-item {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .9rem;
  font-weight: 600;
  color: var(--text);
}
.feature-item i { color: var(--accent); font-size: 1.1rem; }
.about-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ===== GALLERY ===== */
.gallery {
  padding: 6rem 0;
  background: var(--gray);
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: auto auto;
  gap: 1rem;
}
.gallery-item {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 4/3;
}
.gallery-item.large {
  grid-column: span 2;
  grid-row: span 2;
  aspect-ratio: auto;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.gallery-item:hover img { transform: scale(1.08); }
.gallery-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,43,110,.8) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 1rem;
  opacity: 0;
  transition: var(--transition);
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-overlay span {
  color: var(--white);
  font-weight: 700;
  font-size: .95rem;
}

/* ===== WHY US ===== */
.why-us {
  padding: 6rem 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.8rem;
}
.why-card {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius);
  padding: 2.2rem 1.8rem;
  text-align: center;
  color: var(--white);
  transition: var(--transition);
  backdrop-filter: blur(8px);
}
.why-card:hover {
  background: rgba(255,255,255,.15);
  transform: translateY(-6px);
  border-color: rgba(255,255,255,.3);
}
.why-icon {
  width: 64px; height: 64px;
  background: rgba(255,255,255,.12);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.2rem;
  font-size: 1.6rem;
  color: var(--gold);
  transition: var(--transition);
}
.why-card:hover .why-icon {
  background: var(--gold);
  color: var(--primary);
}
.why-card h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: .5rem;
}
.why-card p {
  font-size: .88rem;
  color: rgba(255,255,255,.75);
  line-height: 1.7;
}

/* ===== CONTACT ===== */
.contact {
  padding: 6rem 0;
  background: var(--white);
}
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}
.contact-card {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  background: var(--gray);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: var(--transition);
  border: 2px solid transparent;
}
.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.phone-card:hover { border-color: var(--primary); }
.whatsapp-card:hover { border-color: var(--accent); }
.location-card:hover { border-color: var(--gold); }

.contact-icon {
  width: 56px; height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--white);
  flex-shrink: 0;
}
.whatsapp-icon { background: linear-gradient(135deg, #25d366, #128c7e); }
.location-icon { background: linear-gradient(135deg, var(--gold), #e07b00); }

.contact-details { flex: 1; }
.contact-details h3 {
  font-size: .95rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: .2rem;
}
.contact-details p {
  font-size: .82rem;
  color: var(--text-light);
  margin-bottom: .3rem;
}
.contact-number {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  direction: ltr;
  display: inline-block;
}

.btn-contact-call,
.btn-contact-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .6rem 1.2rem;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 700;
  font-family: 'Cairo', sans-serif;
  white-space: nowrap;
  transition: var(--transition);
  flex-shrink: 0;
}
.btn-contact-call {
  background: var(--primary);
  color: var(--white);
}
.btn-contact-call:hover {
  background: var(--primary-light);
  transform: scale(1.05);
}
.btn-contact-whatsapp {
  background: linear-gradient(135deg, #25d366, #128c7e);
  color: var(--white);
}
.btn-contact-whatsapp:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(37,211,102,.4);
}

/* ===== CONTACT FORM ===== */
.contact-form-wrap {
  background: var(--gray);
  border-radius: var(--radius);
  padding: 2.5rem;
}
.contact-form h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 1.5rem;
}
.form-group {
  margin-bottom: 1.2rem;
}
.form-group label {
  display: block;
  font-size: .88rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: .4rem;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: .85rem 1.1rem;
  border: 2px solid #e2e8f0;
  border-radius: 10px;
  font-family: 'Cairo', sans-serif;
  font-size: .92rem;
  color: var(--text);
  background: var(--white);
  transition: var(--transition);
  outline: none;
  direction: rtl;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(26,77,184,.12);
}
.form-group textarea { resize: vertical; min-height: 100px; }
.btn-submit {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  background: linear-gradient(135deg, #25d366, #128c7e);
  color: var(--white);
  padding: 1rem;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 700;
  font-family: 'Cairo', sans-serif;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 6px 20px rgba(37,211,102,.35);
}
.btn-submit:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(37,211,102,.5);
}
.btn-submit i { font-size: 1.2rem; }

/* ===== FOOTER ===== */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,.8);
  padding: 4rem 0 0;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.footer-logo {
  width: 60px; height: 60px;
  object-fit: contain;
  filter: brightness(0) invert(1);
}
.footer-brand h3 {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--white);
}
.footer-brand p {
  font-size: .82rem;
  color: rgba(255,255,255,.55);
}
.footer-links h4,
.footer-services h4,
.footer-contact h4 {
  font-size: .95rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 1.2rem;
}
.footer-links ul li,
.footer-services ul li {
  margin-bottom: .6rem;
  font-size: .88rem;
}
.footer-links ul li a:hover { color: var(--gold); }
.footer-services ul li {
  display: flex;
  align-items: center;
  gap: .5rem;
  color: rgba(255,255,255,.65);
}
.footer-services ul li i { color: var(--gold); width: 16px; }
.footer-phone,
.footer-whatsapp {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .9rem;
  font-weight: 600;
  margin-bottom: .7rem;
  transition: var(--transition);
}
.footer-phone i { color: var(--primary-light); }
.footer-whatsapp i { color: var(--accent); }
.footer-phone:hover { color: var(--white); }
.footer-whatsapp:hover { color: var(--accent); }
.footer-contact p {
  font-size: .85rem;
  color: rgba(255,255,255,.55);
  display: flex;
  align-items: center;
  gap: .4rem;
}
.footer-contact p i { color: var(--gold); }
.footer-bottom {
  text-align: center;
  padding: 1.5rem 0;
  font-size: .82rem;
  color: rgba(255,255,255,.4);
}

/* ===== FLOATING BUTTONS ===== */
.floating-btns {
  position: fixed;
  bottom: 2rem;
  left: 1.5rem;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: .85rem;
}
.float-btn {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1.3rem;
  border-radius: 50px;
  font-size: .92rem;
  font-weight: 700;
  color: var(--white);
  box-shadow: 0 6px 24px rgba(0,0,0,.25);
  transition: var(--transition);
  white-space: nowrap;
}
.float-call {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  animation: floatPulse 2.5s infinite;
}
.float-whatsapp {
  background: linear-gradient(135deg, #25d366, #128c7e);
  animation: floatPulseWa 2.5s infinite .5s;
}
.float-btn:hover {
  transform: scale(1.08) translateX(-4px);
}
.float-btn i { font-size: 1.1rem; }
.float-label { font-size: .88rem; }

@keyframes floatPulse {
  0%, 100% { box-shadow: 0 6px 24px rgba(13,43,110,.35); }
  50% { box-shadow: 0 6px 36px rgba(13,43,110,.55), 0 0 0 6px rgba(13,43,110,.1); }
}
@keyframes floatPulseWa {
  0%, 100% { box-shadow: 0 6px 24px rgba(37,211,102,.35); }
  50% { box-shadow: 0 6px 36px rgba(37,211,102,.55), 0 0 0 6px rgba(37,211,102,.1); }
}

/* ===== BACK TO TOP ===== */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 1.5rem;
  z-index: 999;
  width: 48px; height: 48px;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: 50%;
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(13,43,110,.35);
  transition: var(--transition);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
}
.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--primary-light);
  transform: translateY(-4px);
}

/* ===== LIGHTBOX ===== */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.92);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease;
}
.lightbox.open {
  opacity: 1;
  pointer-events: auto;
}
.lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,.5);
}
.lightbox-close {
  position: absolute;
  top: 1.5rem; right: 1.5rem;
  width: 44px; height: 44px;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 50%;
  color: var(--white);
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition);
}
.lightbox-close:hover { background: rgba(255,255,255,.25); }

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .about-container { grid-template-columns: 1fr; gap: 2.5rem; }
  .about-content { padding-right: 0; }
  .about-badge-float { left: 1rem; bottom: -1rem; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .contact-wrapper { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 100%; right: 0; left: 0; background: var(--white); padding: 1rem; box-shadow: 0 10px 30px rgba(0,0,0,.1); gap: .25rem; }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }
  .nav-cta { display: none; }
  .gallery-grid { grid-template-columns: 1fr 1fr; }
  .gallery-item.large { grid-column: span 2; }
  .footer-top { grid-template-columns: 1fr; gap: 1.5rem; }
  .hero-stats { gap: 1rem; }
  .stat-num { font-size: 1.6rem; }
  .about-features { grid-template-columns: 1fr; }
  .float-btn { padding: .75rem; border-radius: 50%; }
  .float-label { display: none; }
}

@media (max-width: 480px) {
  .services-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-item.large { grid-column: span 1; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn-primary,
  .hero-actions .btn-whatsapp { width: 100%; justify-content: center; }
  .contact-card { flex-wrap: wrap; }
  .btn-contact-call, .btn-contact-whatsapp { width: 100%; justify-content: center; }
}