/* ============================================
   HARI OM DEVELOPERS - Premium Construction Website
   Mobile-First Responsive Stylesheet
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors */
  --color-primary: #1E3A5F;
  --color-primary-dark: #152a45;
  --color-primary-light: #2a5080;
  --color-secondary: #D4AF37;
  --color-secondary-light: #e8c95a;
  --color-secondary-dark: #b8962e;
  --color-white: #ffffff;
  --color-gray-50: #f8f9fa;
  --color-gray-100: #f1f3f5;
  --color-gray-200: #e9ecef;
  --color-gray-300: #dee2e6;
  --color-gray-400: #adb5bd;
  --color-gray-500: #6c757d;
  --color-gray-600: #495057;
  --color-gray-700: #343a40;
  --color-gray-800: #212529;
  --color-gray-900: #1a1d20;
  --color-footer: #0f1a2e;

  /* Typography */
  --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;

  /* Spacing */
  --section-padding: 5rem 0;
  --container-padding: 1.25rem;
  --container-max: 1200px;

  /* Effects */
  --shadow-sm: 0 2px 8px rgba(30, 58, 95, 0.08);
  --shadow-md: 0 4px 20px rgba(30, 58, 95, 0.12);
  --shadow-lg: 0 8px 40px rgba(30, 58, 95, 0.16);
  --shadow-gold: 0 4px 20px rgba(212, 175, 55, 0.3);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  --radius-full: 50%;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.15);
  --glass-border: rgba(255, 255, 255, 0.25);
  --glass-blur: blur(12px);

  /* Z-index layers */
  --z-header: 1000;
  --z-loader: 9999;
  --z-whatsapp: 900;
  --z-back-to-top: 900;
  --z-lightbox: 10000;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-gray-700);
  background-color: var(--color-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.no-scroll {
  overflow: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

ul {
  list-style: none;
}

address {
  font-style: normal;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input,
textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ---------- Utility Classes ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--section-padding);
}

.section--gray {
  background-color: var(--color-gray-50);
}

.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
}

/* Section Headers */
.section__header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section__label {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--color-secondary);
  margin-bottom: 0.75rem;
}

.section__title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-500);
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
  z-index: -1;
}

.btn:hover::before {
  left: 100%;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-dark));
  color: var(--color-white);
  box-shadow: var(--shadow-gold);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(212, 175, 55, 0.45);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid var(--color-white);
}

.btn--outline:hover {
  background: var(--color-white);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn--full {
  width: 100%;
}

/* ---------- Loading Screen ---------- */
.loader {
  position: fixed;
  inset: 0;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-loader);
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader__inner {
  text-align: center;
}

.loader__logo {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 2rem;
}

.loader__logo span {
  color: var(--color-secondary);
}

.loader__bar {
  width: 200px;
  height: 3px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 3px;
  overflow: hidden;
  margin: 0 auto;
}

.loader__progress {
  width: 0;
  height: 100%;
  background: var(--color-secondary);
  border-radius: 3px;
  animation: loadProgress 1.5s ease forwards;
}

@keyframes loadProgress {
  to { width: 100%; }
}

/* ---------- Header & Navigation ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  padding: 1rem 0;
  transition: all var(--transition-base);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  padding: 0.75rem 0;
}

.header.scrolled .nav__logo,
.header.scrolled .nav__link {
  color: var(--color-primary);
}

.header.scrolled .nav__toggle-bar {
  background: var(--color-primary);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-white);
  transition: color var(--transition-base);
}

.nav__logo span {
  color: var(--color-secondary);
}

.nav__toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  z-index: calc(var(--z-header) + 1);
}

.nav__toggle-bar {
  width: 24px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.nav__toggle.active .nav__toggle-bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle.active .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav__toggle.active .nav__toggle-bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.nav__menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  max-width: 320px;
  height: 100vh;
  background: var(--color-white);
  padding: 5rem 2rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  box-shadow: var(--shadow-lg);
  transition: right var(--transition-base);
  z-index: var(--z-header);
}

.nav__menu.active {
  right: 0;
}

.nav__link {
  display: block;
  padding: 0.875rem 1rem;
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-gray-700);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-secondary);
  background: var(--color-gray-50);
}

.nav__link--cta {
  background: var(--color-primary);
  color: var(--color-white) !important;
  text-align: center;
  margin-top: 1rem;
}

.nav__link--cta:hover {
  background: var(--color-primary-dark);
}

/* Nav overlay for mobile */
.nav__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: calc(var(--z-header) - 1);
}

.nav__overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ---------- Hero Section ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(135deg, rgba(30, 58, 95, 0.85) 0%, rgba(15, 26, 46, 0.75) 100%),
    url('https://images.unsplash.com/photo-1504307651254-35680f356dfd?w=1920&h=1080&fit=crop') center/cover no-repeat;
  padding: 6rem 0 4rem;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 0%, rgba(15, 26, 46, 0.4) 100%);
}

.hero__content {
  position: relative;
  text-align: center;
  z-index: 1;
}

.hero__badge {
  display: inline-block;
  padding: 0.5rem 1.5rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-secondary);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero__title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.15;
  margin-bottom: 1.5rem;
}

.hero__title span {
  color: var(--color-secondary);
}

.hero__tagline {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  font-weight: 300;
}

.hero__buttons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
}

.hero__scroll-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 2px;
  animation: bounce 2s infinite;
}

.hero__scroll-link:hover {
  color: var(--color-secondary);
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-8px); }
  60% { transform: translateY(-4px); }
}

/* ---------- About Section ---------- */
.about__grid {
  display: grid;
  gap: 3rem;
  align-items: center;
}

.about__image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.about__image:hover img {
  transform: scale(1.05);
}

.about__experience {
  position: absolute;
  bottom: 2rem;
  right: -1rem;
  background: var(--color-secondary);
  color: var(--color-white);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-gold);
}

.about__experience-number {
  display: block;
  font-size: var(--font-size-3xl);
  font-weight: 700;
  line-height: 1;
}

.about__experience-text {
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1.3;
}

.about__intro {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.about__cards {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.about__card {
  padding: 1.5rem;
  border-radius: var(--radius-md);
  background: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
}

.about__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.about__card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-secondary);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-lg);
  margin-bottom: 1rem;
}

.about__card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.about__card p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.about__commitment {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
}

.about__commitment i {
  color: var(--color-secondary);
  font-size: var(--font-size-xl);
  flex-shrink: 0;
  margin-top: 0.15rem;
}

/* ---------- Services Section ---------- */
.services__grid {
  display: grid;
  gap: 1.5rem;
}

.service-card {
  position: relative;
  padding: 2rem;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background: var(--color-secondary);
  transition: height var(--transition-base);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.service-card:hover::before {
  height: 100%;
}

.service-card__icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: var(--color-secondary);
  border-radius: var(--radius-md);
  font-size: var(--font-size-2xl);
  margin-bottom: 1.25rem;
  transition: transform var(--transition-base);
}

.service-card:hover .service-card__icon {
  transform: scale(1.1) rotate(-5deg);
}

.service-card__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.service-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.service-card__arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-gray-100);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
}

.service-card:hover .service-card__arrow {
  background: var(--color-secondary);
  color: var(--color-white);
  transform: translateX(4px);
}

/* ---------- Why Choose Us Section ---------- */
.why-us__grid {
  display: grid;
  gap: 1.5rem;
}

.why-card {
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
}

.why-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-secondary);
}

.why-card__icon {
  width: 70px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  background: linear-gradient(135deg, rgba(30, 58, 95, 0.08), rgba(212, 175, 55, 0.08));
  color: var(--color-secondary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-2xl);
  transition: all var(--transition-base);
}

.why-card:hover .why-card__icon {
  background: var(--color-primary);
  color: var(--color-secondary);
  transform: scale(1.1);
}

.why-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.why-card p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

/* ---------- Projects Section ---------- */
.projects__grid {
  display: grid;
  gap: 2rem;
}

.project-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.project-card__image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-card__image img {
  transform: scale(1.08);
}

.project-card__year {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.4rem 1rem;
  background: var(--color-secondary);
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.project-card__content {
  padding: 1.5rem;
}

.project-card__location {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
  margin-bottom: 0.5rem;
}

.project-card__location i {
  color: var(--color-secondary);
}

.project-card__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.project-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  line-height: 1.7;
}

/* ---------- Gallery Section ---------- */
.gallery__masonry {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.gallery__item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
}

.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery__item:hover img {
  transform: scale(1.1);
}

.gallery__overlay {
  position: absolute;
  inset: 0;
  background: rgba(30, 58, 95, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.gallery__overlay i {
  color: var(--color-white);
  font-size: var(--font-size-2xl);
  transform: scale(0.5);
  transition: transform var(--transition-base);
}

.gallery__item:hover .gallery__overlay {
  opacity: 1;
}

.gallery__item:hover .gallery__overlay i {
  transform: scale(1);
}

/* ---------- Testimonials Section ---------- */
.testimonials__grid {
  display: grid;
  gap: 1.5rem;
}

.testimonial-card {
  padding: 2rem;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
  position: relative;
}

.testimonial-card::before {
  content: '\201C';
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-size: 4rem;
  color: var(--color-gray-200);
  font-family: Georgia, serif;
  line-height: 1;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.testimonial-card__stars {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1rem;
  color: var(--color-secondary);
  font-size: var(--font-size-sm);
}

.testimonial-card__quote {
  font-size: var(--font-size-base);
  color: var(--color-gray-600);
  line-height: 1.8;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.testimonial-card__author img {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 3px solid var(--color-secondary);
}

.testimonial-card__name {
  display: block;
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-primary);
  font-style: normal;
}

.testimonial-card__role {
  font-size: var(--font-size-sm);
  color: var(--color-gray-400);
}

/* ---------- Contact Section ---------- */
.contact__grid {
  display: grid;
  gap: 3rem;
}

.contact__item {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.contact__icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-secondary);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

.contact__item h3 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-gray-400);
  margin-bottom: 0.25rem;
}

.contact__item a {
  color: var(--color-primary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.contact__item a:hover {
  color: var(--color-secondary);
}

.contact__item address {
  color: var(--color-gray-600);
  line-height: 1.6;
}

.contact__map {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-top: 1rem;
}

.contact__map iframe {
  width: 100%;
  height: 250px;
  border: 0;
  display: block;
}

/* Contact Form */
.contact__form {
  padding: 2rem;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-gray-200);
}

.contact__form-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
}

.form__group {
  margin-bottom: 1.25rem;
}

.form__group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-600);
  margin-bottom: 0.5rem;
}

.form__group input,
.form__group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  background: var(--color-gray-50);
  color: var(--color-gray-700);
  transition: all var(--transition-fast);
}

.form__group input:focus,
.form__group textarea:focus {
  outline: none;
  border-color: var(--color-secondary);
  background: var(--color-white);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.15);
}

.form__group input.error,
.form__group textarea.error {
  border-color: #e74c3c;
}

.form__group textarea {
  resize: vertical;
  min-height: 120px;
}

.form__error {
  display: block;
  font-size: var(--font-size-xs);
  color: #e74c3c;
  margin-top: 0.35rem;
  min-height: 1rem;
}

.form__success {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem;
  background: #d4edda;
  border: 1px solid #c3e6cb;
  border-radius: var(--radius-sm);
  margin-top: 1rem;
  color: #155724;
}

.form__success i {
  font-size: var(--font-size-xl);
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.form__success p {
  font-size: var(--font-size-sm);
}

/* ---------- Footer ---------- */
.footer {
  background: var(--color-footer);
  color: rgba(255, 255, 255, 0.7);
  padding: 4rem 0 0;
}

.footer__grid {
  display: grid;
  gap: 2.5rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__logo {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-white);
  display: inline-block;
  margin-bottom: 1rem;
}

.footer__logo span {
  color: var(--color-secondary);
}

.footer__brand p {
  font-size: var(--font-size-sm);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.footer__social {
  display: flex;
  gap: 0.75rem;
}

.footer__social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
}

.footer__social a:hover {
  background: var(--color-secondary);
  color: var(--color-white);
  transform: translateY(-3px);
}

.footer__links h3,
.footer__contact h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 1.25rem;
}

.footer__links ul li,
.footer__contact ul li {
  margin-bottom: 0.75rem;
}

.footer__links a {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
  transition: all var(--transition-fast);
}

.footer__links a:hover {
  color: var(--color-secondary);
  padding-left: 0.5rem;
}

.footer__contact ul li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: var(--font-size-sm);
}

.footer__contact ul li i {
  color: var(--color-secondary);
  margin-top: 0.2rem;
  flex-shrink: 0;
}

.footer__contact a {
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-fast);
}

.footer__contact a:hover {
  color: var(--color-secondary);
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-align: center;
  padding: 1.5rem 0;
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.4);
}

/* ---------- WhatsApp Button ---------- */
.whatsapp-btn {
  position: fixed;
  bottom: 5.5rem;
  right: 1.25rem;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #25d366;
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: var(--font-size-2xl);
  box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
  z-index: var(--z-whatsapp);
  transition: all var(--transition-base);
}

.whatsapp-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 25px rgba(37, 211, 102, 0.5);
}

.whatsapp-btn__tooltip {
  position: absolute;
  right: calc(100% + 10px);
  background: var(--color-gray-800);
  color: var(--color-white);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

.whatsapp-btn:hover .whatsapp-btn__tooltip {
  opacity: 1;
  visibility: visible;
}

/* ---------- Back to Top Button ---------- */
.back-to-top {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: var(--font-size-base);
  box-shadow: var(--shadow-md);
  z-index: var(--z-back-to-top);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-secondary);
  transform: translateY(-4px);
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-lightbox);
  padding: 2rem;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox__close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xl);
  transition: background var(--transition-fast);
}

.lightbox__close:hover {
  background: rgba(255, 255, 255, 0.25);
}

.lightbox__image {
  max-width: 90%;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  transform: scale(0.9);
  transition: transform var(--transition-base);
}

.lightbox.active .lightbox__image {
  transform: scale(1);
}

/* ---------- Scroll Animations ---------- */
.fade-in {
  opacity: 0;
  animation: fadeIn 1s ease forwards;
}

.fade-in:nth-child(1) { animation-delay: 0.2s; }
.fade-in:nth-child(2) { animation-delay: 0.4s; }
.fade-in:nth-child(3) { animation-delay: 0.6s; }
.fade-in:nth-child(4) { animation-delay: 0.8s; }

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.slide-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.slide-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered animation for grid children */
.services__grid .slide-up:nth-child(2) { transition-delay: 0.1s; }
.services__grid .slide-up:nth-child(3) { transition-delay: 0.2s; }
.services__grid .slide-up:nth-child(4) { transition-delay: 0.3s; }
.services__grid .slide-up:nth-child(5) { transition-delay: 0.4s; }

.why-us__grid .slide-up:nth-child(2) { transition-delay: 0.1s; }
.why-us__grid .slide-up:nth-child(3) { transition-delay: 0.2s; }
.why-us__grid .slide-up:nth-child(4) { transition-delay: 0.3s; }
.why-us__grid .slide-up:nth-child(5) { transition-delay: 0.4s; }

.projects__grid .slide-up:nth-child(2) { transition-delay: 0.15s; }
.projects__grid .slide-up:nth-child(3) { transition-delay: 0.3s; }

.testimonials__grid .slide-up:nth-child(2) { transition-delay: 0.15s; }
.testimonials__grid .slide-up:nth-child(3) { transition-delay: 0.3s; }

/* ---------- Responsive: Tablet (768px+) ---------- */
@media (min-width: 768px) {
  :root {
    --section-padding: 6rem 0;
    --container-padding: 2rem;
  }

  .section__title {
    font-size: var(--font-size-4xl);
  }

  .hero__title {
    font-size: var(--font-size-5xl);
  }

  .hero__buttons {
    flex-direction: row;
    justify-content: center;
  }

  .nav__toggle {
    display: none;
  }

  .nav__menu {
    position: static;
    width: auto;
    max-width: none;
    height: auto;
    background: transparent;
    padding: 0;
    flex-direction: row;
    align-items: center;
    gap: 0.25rem;
    box-shadow: none;
  }

  .nav__link {
    padding: 0.5rem 0.875rem;
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.9);
  }

  .header.scrolled .nav__link {
    color: var(--color-gray-700);
  }

  .nav__link--cta {
    margin-top: 0;
    margin-left: 0.5rem;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-sm);
  }

  .about__grid {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }

  .about__cards {
    grid-template-columns: 1fr 1fr;
  }

  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .why-us__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .projects__grid .project-card:last-child {
    grid-column: span 2;
    max-width: 50%;
    margin: 0 auto;
  }

  .gallery__masonry {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }

  .gallery__item--wide {
    grid-column: span 2;
  }

  .testimonials__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testimonials__grid .testimonial-card:last-child {
    grid-column: span 2;
    max-width: 50%;
    margin: 0 auto;
  }

  .contact__grid {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }

  .contact__map iframe {
    height: 300px;
  }

  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* ---------- Responsive: Laptop (1024px+) ---------- */
@media (min-width: 1024px) {
  .services__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .services__grid .service-card:last-child {
    grid-column: span 1;
  }

  .why-us__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .why-us__grid .why-card:nth-child(4),
  .why-us__grid .why-card:nth-child(5) {
    grid-column: span 1;
  }

  .why-us__grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .projects__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .projects__grid .project-card:last-child {
    grid-column: auto;
    max-width: none;
    margin: 0;
  }

  .testimonials__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .testimonials__grid .testimonial-card:last-child {
    grid-column: auto;
    max-width: none;
    margin: 0;
  }

  .gallery__masonry {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ---------- Responsive: Desktop (1200px+) ---------- */
@media (min-width: 1200px) {
  :root {
    --section-padding: 7rem 0;
  }

  .hero__tagline {
    font-size: var(--font-size-xl);
  }
}

/* ---------- Accessibility: Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .slide-up {
    opacity: 1;
    transform: none;
  }
}

/* ---------- Focus Styles for Keyboard Navigation ---------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}