/* =============================================
   DURAI BUILDERS — Premium CSS Design System
   Madurai, Tamil Nadu
============================================= */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600;700;800&family=Inter:wght@300;400;500;600;700&display=swap');

/* ---- CSS Variables ---- */
:root {
  --gold: #c9a84c;
  --gold-light: #f0c96a;
  --gold-dark: #9e7a2e;
  --dark: #0d0d0d;
  --dark-2: #161616;
  --dark-3: #1e1e1e;
  --dark-4: #252525;
  --dark-5: #2e2e2e;
  --light: #f5f1eb;
  --light-2: #e8e0d0;
  --white: #ffffff;
  --gray: #9a9a9a;
  --gray-light: #c0c0c0;
  --success: #4caf7d;
  --danger: #e05252;
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 64px rgba(0,0,0,0.5);
  --shadow-gold: 0 0 24px rgba(201,168,76,0.25);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 32px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --nav-height: 80px;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background-color: var(--dark);
  color: var(--light);
  line-height: 1.6;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: var(--font-body); }
input, textarea, select { font-family: var(--font-body); }

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark-2); }
::-webkit-scrollbar-thumb { background: var(--gold); border-radius: 3px; }

/* ---- Typography ---- */
h1, h2, h3, h4, h5 { font-family: var(--font-heading); line-height: 1.2; }
h1 { font-size: clamp(2.4rem, 5vw, 4rem); font-weight: 700; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 600; }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); font-weight: 600; }
h4 { font-size: 1.2rem; font-weight: 600; }
p { font-size: 1rem; color: var(--gray-light); }

/* ---- Utilities ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
.section-padding { padding: 100px 0; }
.text-gold { color: var(--gold); }
.text-center { text-align: center; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

/* ---- Section Header ---- */
.section-header { text-align: center; margin-bottom: 4rem; }
.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--gold);
  border: 1px solid var(--gold);
  padding: 0.3rem 1.2rem;
  border-radius: 50px;
  margin-bottom: 1rem;
}
.section-title { color: var(--white); margin-bottom: 1rem; }
.section-title span { color: var(--gold); }
.section-desc { max-width: 600px; margin: 0 auto; color: var(--gray); font-size: 1.05rem; }
.section-divider {
  width: 60px; height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  margin: 1.5rem auto 0;
  border-radius: 2px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.85rem 2rem; border-radius: var(--radius-sm);
  font-size: 0.95rem; font-weight: 600; letter-spacing: 0.5px;
  transition: var(--transition); position: relative; overflow: hidden;
}
.btn-primary {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: var(--dark);
  box-shadow: 0 4px 20px rgba(201,168,76,0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(201,168,76,0.6);
}
.btn-outline {
  border: 2px solid var(--gold);
  color: var(--gold);
  background: transparent;
}
.btn-outline:hover {
  background: var(--gold);
  color: var(--dark);
  transform: translateY(-2px);
}
.btn-white {
  background: var(--white);
  color: var(--dark);
}
.btn-white:hover { background: var(--light-2); transform: translateY(-2px); }

/* ========================================
   NAVIGATION
======================================== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-height); z-index: 1000;
  display: flex; align-items: center;
  transition: var(--transition);
  padding: 0 2rem;
}
.navbar.scrolled {
  background: rgba(13,13,13,0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(201,168,76,0.2);
  box-shadow: var(--shadow-md);
}
.navbar.transparent { background: transparent; }
.nav-container {
  max-width: 1200px; width: 100%; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  display: flex; align-items: center; gap: 0.8rem;
}
.nav-logo-icon {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; font-weight: 800;
  color: var(--dark); font-family: var(--font-heading);
}
.nav-logo-text { display: flex; flex-direction: column; }
.nav-logo-name {
  font-family: var(--font-heading);
  font-size: 1.2rem; font-weight: 700;
  color: var(--white); line-height: 1;
}
.nav-logo-sub {
  font-size: 0.65rem; letter-spacing: 2px;
  text-transform: uppercase; color: var(--gold);
}
.nav-links {
  display: flex; align-items: center; gap: 0.5rem;
}
.nav-links a {
  color: var(--gray-light); font-size: 0.9rem; font-weight: 500;
  padding: 0.5rem 0.8rem; border-radius: var(--radius-sm);
  position: relative;
}
.nav-links a::after {
  content: ''; position: absolute;
  bottom: 2px; left: 50%; transform: translateX(-50%);
  width: 0; height: 2px;
  background: var(--gold);
  transition: var(--transition); border-radius: 2px;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--gold);
}
.nav-links a:hover::after, .nav-links a.active::after { width: 60%; }
.nav-cta { margin-left: 1rem; }
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  cursor: pointer; padding: 0.5rem;
}
.hamburger span {
  display: block; width: 24px; height: 2px;
  background: var(--light); transition: var(--transition); border-radius: 2px;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ========================================
   HERO SECTION
======================================== */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-image: url('../images/hero-bg.jpg');
  background-size: cover; background-position: center;
  transform: scale(1.05);
  transition: transform 6s ease-out;
}
.hero-bg.loaded { transform: scale(1); }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(
    135deg,
    rgba(13,13,13,0.92) 0%,
    rgba(13,13,13,0.7) 50%,
    rgba(13,13,13,0.5) 100%
  );
}
.hero-content {
  position: relative; z-index: 2;
  max-width: 1200px; margin: 0 auto; padding: 0 2rem;
  padding-top: var(--nav-height);
}
.hero-tag {
  display: inline-flex; align-items: center; gap: 0.6rem;
  background: rgba(201,168,76,0.15);
  border: 1px solid rgba(201,168,76,0.4);
  padding: 0.5rem 1.2rem; border-radius: 50px;
  font-size: 0.8rem; font-weight: 600;
  letter-spacing: 2px; text-transform: uppercase;
  color: var(--gold); margin-bottom: 1.5rem;
  animation: fadeInDown 0.8s ease both;
}
.hero-tag-dot {
  width: 6px; height: 6px;
  background: var(--gold); border-radius: 50%;
  animation: pulse 2s infinite;
}
.hero-title {
  font-size: clamp(2.8rem, 6vw, 5rem);
  color: var(--white); line-height: 1.1;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.8s ease 0.2s both;
}
.hero-title .gold-text { color: var(--gold); }
.hero-title .outline-text {
  -webkit-text-stroke: 2px var(--gold);
  color: transparent;
}
.hero-desc {
  font-size: 1.1rem; color: var(--gray-light);
  max-width: 580px; margin-bottom: 2.5rem; line-height: 1.8;
  animation: fadeInUp 0.8s ease 0.4s both;
}
.hero-actions {
  display: flex; gap: 1rem; flex-wrap: wrap;
  margin-bottom: 4rem;
  animation: fadeInUp 0.8s ease 0.6s both;
}
.hero-stats {
  display: flex; gap: 3rem; flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.8s both;
}
.hero-stat-item { display: flex; flex-direction: column; }
.hero-stat-num {
  font-family: var(--font-heading);
  font-size: 2.2rem; font-weight: 700;
  color: var(--gold); line-height: 1;
}
.hero-stat-label {
  font-size: 0.8rem; color: var(--gray);
  letter-spacing: 1px; text-transform: uppercase; margin-top: 0.3rem;
}
.hero-scroll {
  position: absolute; bottom: 2.5rem; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  z-index: 2; animation: fadeIn 1s ease 1.5s both;
}
.hero-scroll span { font-size: 0.7rem; letter-spacing: 2px; color: var(--gray); text-transform: uppercase; }
.scroll-line {
  width: 1px; height: 50px;
  background: linear-gradient(180deg, var(--gold), transparent);
  animation: scrollAnim 2s ease infinite;
}

/* ========================================
   ABOUT SECTION
======================================== */
.about { background: var(--dark-2); }
.about-image-wrap {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
}
.about-image-wrap img { width: 100%; height: 500px; object-fit: cover; }
.about-badge {
  position: absolute; bottom: -20px; right: -20px;
  width: 140px; height: 140px;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  border-radius: 50%; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  box-shadow: var(--shadow-gold); border: 4px solid var(--dark-2);
}
.about-badge-num {
  font-family: var(--font-heading);
  font-size: 2.4rem; font-weight: 800; color: var(--dark); line-height: 1;
}
.about-badge-text { font-size: 0.65rem; font-weight: 700; color: var(--dark); text-align: center; line-height: 1.2; }
.about-content { padding-left: 1rem; }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin: 2rem 0; }
.about-feature {
  display: flex; align-items: flex-start; gap: 0.8rem;
  background: var(--dark-3); padding: 1rem;
  border-radius: var(--radius-md); border: 1px solid var(--dark-5);
  transition: var(--transition);
}
.about-feature:hover { border-color: rgba(201,168,76,0.4); transform: translateY(-2px); }
.about-feature-icon {
  width: 36px; height: 36px; min-width: 36px;
  background: rgba(201,168,76,0.15);
  border-radius: var(--radius-sm); display: flex;
  align-items: center; justify-content: center;
  font-size: 1.1rem; color: var(--gold);
}
.about-feature-text h5 { font-size: 0.9rem; color: var(--white); margin-bottom: 0.2rem; }
.about-feature-text p { font-size: 0.8rem; color: var(--gray); }

/* ========================================
   SERVICES SECTION
======================================== */
.services { background: var(--dark); }
.service-card {
  background: var(--dark-3);
  border: 1px solid var(--dark-5);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  transition: var(--transition);
  position: relative; overflow: hidden;
  cursor: default;
}
.service-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  transform: scaleX(0); transform-origin: left;
  transition: var(--transition);
}
.service-card:hover::before { transform: scaleX(1); }
.service-card:hover {
  border-color: rgba(201,168,76,0.3);
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}
.service-icon {
  width: 70px; height: 70px;
  background: rgba(201,168,76,0.1);
  border: 1px solid rgba(201,168,76,0.3);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; margin-bottom: 1.5rem;
  color: var(--gold);
  transition: var(--transition);
}
.service-card:hover .service-icon {
  background: rgba(201,168,76,0.2);
  transform: scale(1.1);
}
.service-card h3 { color: var(--white); margin-bottom: 0.8rem; font-size: 1.2rem; }
.service-card p { font-size: 0.9rem; line-height: 1.7; color: var(--gray); }
.service-card .service-list {
  margin-top: 1.2rem; display: flex; flex-direction: column; gap: 0.5rem;
}
.service-card .service-list li {
  font-size: 0.85rem; color: var(--gray-light);
  display: flex; align-items: center; gap: 0.5rem;
}
.service-card .service-list li::before {
  content: '✓'; color: var(--gold); font-weight: 700; font-size: 0.8rem;
}

/* ========================================
   PROJECTS SECTION
======================================== */
.projects { background: var(--dark-2); }
.project-filters {
  display: flex; justify-content: center; gap: 0.8rem;
  margin-bottom: 3rem; flex-wrap: wrap;
}
.filter-btn {
  padding: 0.5rem 1.4rem;
  border: 1px solid var(--dark-5);
  border-radius: 50px; font-size: 0.85rem; font-weight: 500;
  color: var(--gray); background: var(--dark-3);
  transition: var(--transition); cursor: pointer;
}
.filter-btn.active, .filter-btn:hover {
  border-color: var(--gold); color: var(--gold);
  background: rgba(201,168,76,0.1);
}
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.project-card {
  border-radius: var(--radius-md); overflow: hidden;
  position: relative; cursor: pointer;
  transition: var(--transition);
}
.project-card:hover { transform: scale(1.02); box-shadow: var(--shadow-lg); }
.project-card img { width: 100%; height: 260px; object-fit: cover; transition: var(--transition); }
.project-card:hover img { transform: scale(1.08); }
.project-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(13,13,13,0.95) 100%);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 1.5rem;
}
.project-category {
  font-size: 0.72rem; font-weight: 600; letter-spacing: 2px;
  text-transform: uppercase; color: var(--gold); margin-bottom: 0.4rem;
}
.project-title { font-family: var(--font-heading); font-size: 1.1rem; color: var(--white); margin-bottom: 0.3rem; }
.project-location { font-size: 0.8rem; color: var(--gray-light); }
.project-status {
  position: absolute; top: 1rem; right: 1rem;
  padding: 0.25rem 0.8rem; border-radius: 50px;
  font-size: 0.7rem; font-weight: 600; letter-spacing: 1px;
  text-transform: uppercase;
}
.project-status.completed { background: rgba(76,175,125,0.9); color: white; }
.project-status.ongoing { background: rgba(201,168,76,0.9); color: var(--dark); }

/* ========================================
   REVIEWS SECTION
======================================== */
.reviews { background: var(--dark); }
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.review-card {
  background: var(--dark-3);
  border: 1px solid var(--dark-5);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
  position: relative;
}
.review-card:hover {
  border-color: rgba(201,168,76,0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.review-quote {
  font-size: 3rem; color: var(--gold);
  font-family: Georgia; line-height: 0.8; margin-bottom: 1rem; opacity: 0.6;
}
.review-stars { display: flex; gap: 0.2rem; margin-bottom: 1rem; }
.review-stars span { color: var(--gold); font-size: 1rem; }
.review-text {
  font-size: 0.9rem; line-height: 1.7; color: var(--gray-light);
  margin-bottom: 1.5rem; font-style: italic;
}
.review-author { display: flex; align-items: center; gap: 1rem; }
.review-avatar {
  width: 48px; height: 48px; border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-heading); font-size: 1.2rem; font-weight: 700; color: var(--dark);
  min-width: 48px;
}
.review-info h5 { color: var(--white); font-size: 0.95rem; }
.review-info p { font-size: 0.78rem; color: var(--gray); }

/* -- Review Form -- */
.review-form-section {
  background: var(--dark-3);
  border: 1px solid var(--dark-5);
  border-radius: var(--radius-xl);
  padding: 3rem; margin-top: 4rem;
  max-width: 700px; margin-left: auto; margin-right: auto;
}
.review-form-section h3 { color: var(--white); margin-bottom: 0.5rem; }
.review-form-section > p { color: var(--gray); margin-bottom: 2rem; }
.star-rating { display: flex; gap: 0.5rem; margin-bottom: 1.5rem; flex-direction: row-reverse; justify-content: flex-end; }
.star-rating input { display: none; }
.star-rating label {
  font-size: 2rem; color: var(--dark-5);
  cursor: pointer; transition: color 0.2s;
}
.star-rating input:checked ~ label,
.star-rating label:hover,
.star-rating label:hover ~ label { color: var(--gold); }

/* ========================================
   CONTACT SECTION
======================================== */
.contact { background: var(--dark-2); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 4rem; align-items: start; }
.contact-info h3 { color: var(--white); margin-bottom: 0.8rem; }
.contact-info > p { color: var(--gray); margin-bottom: 2.5rem; line-height: 1.7; }
.contact-details { display: flex; flex-direction: column; gap: 1.2rem; margin-bottom: 2rem; }
.contact-item {
  display: flex; align-items: flex-start; gap: 1rem;
  background: var(--dark-3); padding: 1.2rem;
  border-radius: var(--radius-md); border: 1px solid var(--dark-5);
  transition: var(--transition);
}
.contact-item:hover { border-color: rgba(201,168,76,0.3); }
.contact-item-icon {
  width: 42px; height: 42px; min-width: 42px;
  background: rgba(201,168,76,0.15);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: var(--gold);
}
.contact-item-text h5 { color: var(--white); font-size: 0.85rem; font-weight: 600; margin-bottom: 0.2rem; }
.contact-item-text a, .contact-item-text p { font-size: 0.9rem; color: var(--gray-light); }
.contact-item-text a:hover { color: var(--gold); }

/* -- Contact Form -- */
.contact-form-wrap {
  background: var(--dark-3); border-radius: var(--radius-xl);
  padding: 2.5rem; border: 1px solid var(--dark-5);
}
.contact-form-wrap h3 { color: var(--white); margin-bottom: 0.5rem; }
.contact-form-wrap > p { color: var(--gray); margin-bottom: 2rem; font-size: 0.9rem; }
.form-group { margin-bottom: 1.2rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--light-2); margin-bottom: 0.5rem; }
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%; background: var(--dark-4);
  border: 1px solid var(--dark-5); border-radius: var(--radius-sm);
  padding: 0.85rem 1rem; color: var(--light);
  font-size: 0.9rem; transition: var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none; border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201,168,76,0.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group select option { background: var(--dark-4); }
.form-submit { width: 100%; padding: 1rem; font-size: 1rem; font-weight: 600; }
.form-message { padding: 0.8rem 1rem; border-radius: var(--radius-sm); margin-top: 1rem; font-size: 0.9rem; display: none; }
.form-message.success { background: rgba(76,175,125,0.15); border: 1px solid var(--success); color: var(--success); display: block; }
.form-message.error { background: rgba(224,82,82,0.15); border: 1px solid var(--danger); color: var(--danger); display: block; }

/* ========================================
   MAP SECTION
======================================== */
.map-section { background: var(--dark); padding: 0; }
.map-section iframe {
  width: 100%; height: 400px; border: none;
  filter: grayscale(0.5) invert(0.9) hue-rotate(200deg);
  opacity: 0.8;
}

/* ========================================
   FOOTER
======================================== */
.footer { background: var(--dark-2); border-top: 1px solid var(--dark-5); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 3rem; margin-bottom: 3rem; }
.footer-brand .nav-logo { margin-bottom: 1rem; }
.footer-brand p { font-size: 0.88rem; color: var(--gray); line-height: 1.7; margin-bottom: 1.5rem; }
.footer-social { display: flex; gap: 0.8rem; }
.footer-social a {
  width: 36px; height: 36px;
  background: var(--dark-4); border: 1px solid var(--dark-5);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; color: var(--gray);
  transition: var(--transition);
}
.footer-social a:hover { background: rgba(201,168,76,0.2); border-color: var(--gold); color: var(--gold); }
.footer-col h4 { color: var(--white); margin-bottom: 1.2rem; font-size: 1rem; }
.footer-col ul { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-col ul a { font-size: 0.88rem; color: var(--gray); }
.footer-col ul a:hover { color: var(--gold); padding-left: 4px; }
.footer-contact { display: flex; flex-direction: column; gap: 0.8rem; }
.footer-contact-item { display: flex; align-items: center; gap: 0.8rem; }
.footer-contact-item span:first-child { color: var(--gold); font-size: 0.9rem; }
.footer-contact-item span:last-child { font-size: 0.85rem; color: var(--gray); }
.footer-bottom {
  border-top: 1px solid var(--dark-5);
  padding: 1.5rem 0; text-align: center;
}
.footer-bottom p { font-size: 0.82rem; color: var(--gray); }
.footer-bottom span { color: var(--gold); }

/* ========================================
   FLOATING ELEMENTS
======================================== */
.whatsapp-float {
  position: fixed; bottom: 2rem; right: 2rem;
  width: 56px; height: 56px; z-index: 999;
  background: #25D366; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; color: white;
  box-shadow: 0 4px 20px rgba(37,211,102,0.5);
  transition: var(--transition);
  animation: floatBounce 3s ease infinite;
  text-decoration: none;
}
.whatsapp-float:hover { transform: scale(1.1); box-shadow: 0 8px 30px rgba(37,211,102,0.7); }
.back-to-top {
  position: fixed; bottom: 2rem; left: 2rem;
  width: 44px; height: 44px; z-index: 999;
  background: rgba(201,168,76,0.9); border-radius: 50%;
  display: none; align-items: center; justify-content: center;
  font-size: 1.1rem; color: var(--dark);
  box-shadow: var(--shadow-gold); transition: var(--transition);
  cursor: pointer; border: none;
}
.back-to-top.visible { display: flex; }
.back-to-top:hover { transform: translateY(-3px); background: var(--gold); }

/* ========================================
   TOAST NOTIFICATION
======================================== */
.toast {
  position: fixed; top: 100px; right: 2rem; z-index: 9999;
  background: var(--dark-3); border-left: 4px solid var(--gold);
  padding: 1rem 1.5rem; border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg); min-width: 300px;
  transform: translateX(400px); transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex; align-items: center; gap: 0.8rem;
}
.toast.show { transform: translateX(0); }
.toast-icon { font-size: 1.3rem; }
.toast-msg { font-size: 0.9rem; color: var(--light); }
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }

/* ========================================
   MOBILE NAV MENU
======================================== */
.mobile-menu {
  display: none;
  position: fixed; top: var(--nav-height); left: 0; right: 0;
  background: rgba(13,13,13,0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--dark-5);
  z-index: 999; padding: 1.5rem 2rem;
  flex-direction: column; gap: 0.3rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  color: var(--light); font-size: 1rem; font-weight: 500;
  padding: 0.8rem 0; border-bottom: 1px solid var(--dark-5);
}
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover { color: var(--gold); }

/* ========================================
   ANIMATIONS
======================================== */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@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); } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
@keyframes scrollAnim { 0% { opacity: 1; height: 50px; } 100% { opacity: 0; height: 0; } }
@keyframes floatBounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
@keyframes shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }
.reveal {
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ========================================
   RESPONSIVE
======================================== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .grid-2, .grid-3, .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  .projects-grid, .reviews-grid { grid-template-columns: 1fr; }
  .about-features { grid-template-columns: 1fr; }
  .about-badge { bottom: 10px; right: 10px; width: 100px; height: 100px; }
  .about-badge-num { font-size: 1.8rem; }
  .hero-stats { gap: 1.5rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .section-padding { padding: 70px 0; }
  .contact-grid { gap: 2.5rem; }
}
@media (max-width: 480px) {
  .container { padding: 0 1.2rem; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
}