/* 
 * Saudik Contracting Co. Ltd.
 * Main Stylesheet
 */

/* Base Styles
========================================================================== */
:root {
  /* Primary Colors */
  --primary-dark: #1a3a63;
  --primary: #2c5282;
  --primary-light: #4a72a5;
  
  /* Secondary Colors */
  --secondary-dark: #4a4a4a;
  --secondary: #6c6c6c;
  --secondary-light: #8a8a8a;
  
  /* Accent Colors */
  --accent: #f26522;
  --accent-light: #f58553;
  
  /* Success, Warning, Error */
  --success: #2e7d32;
  --warning: #f9a825;
  --error: #d32f2f;
  
  /* Neutral Colors */
  --black: #1a1a1a;
  --white: #ffffff;
  --gray-100: #f7f7f7;
  --gray-200: #e9e9e9;
  --gray-300: #d5d5d5;
  --gray-400: #c2c2c2;
  --gray-500: #9e9e9e;
  --gray-600: #757575;
  --gray-700: #616161;
  --gray-800: #424242;
  --gray-900: #212121;
  
  /* Typography */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Roboto', sans-serif;
  
  /* Spacing (8px system) */
  --space-xs: 0.5rem;    /* 8px */
  --space-sm: 1rem;      /* 16px */
  --space-md: 1.5rem;    /* 24px */
  --space-lg: 2rem;      /* 32px */
  --space-xl: 3rem;      /* 48px */
  --space-xxl: 4rem;     /* 64px */
  
  /* Border Radius */
  --radius-sm: 0.25rem;  /* 4px */
  --radius-md: 0.5rem;   /* 8px */
  --radius-lg: 1rem;     /* 16px */
  
  /* Transitions */
  --transition: all 0.3s ease;
  --transition-slow: all 0.5s ease;
  --transition-fast: all 0.2s ease;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.1), 0 3px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 15px 25px rgba(0, 0, 0, 0.15), 0 5px 10px rgba(0, 0, 0, 0.05);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.5;
  color: var(--gray-800);
  background-color: var(--white);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--primary-dark);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

p {
  margin-bottom: var(--space-md);
}

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

a:hover {
  color: var(--primary-light);
}

ul, ol {
  list-style-position: inside;
  margin-bottom: var(--space-md);
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section-padding {
  padding: var(--space-xxl) 0;
}

.section-dark {
  background-color: var(--gray-100);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-header h2 {
  color: var(--primary-dark);
  position: relative;
  display: inline-block;
  margin-bottom: var(--space-sm);
}

.section-divider {
  width: 80px;
  height: 3px;
  background-color: var(--accent);
  margin: 0 auto var(--space-md);
}

.section-header p {
  font-size: 1.1rem;
  color: var(--gray-600);
  max-width: 600px;
  margin: 0 auto;
}

/* Projects Carousel
========================================================================== */
.projects {
  background-color: var(--gray-100);
  padding: var(--space-xxl) 0;
  position: relative;
}

.carousel {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
  overflow: hidden;
}

.carousel-inner {
  display: flex;
  transition: transform 0.5s ease;
}

.carousel-item {
  min-width: 100%;
  display: flex;
  gap: var(--space-xl);
  padding: 0 var(--space-md);
}

.carousel-image {
  flex: 0 0 60%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.carousel-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.carousel-content {
  flex: 0 0 40%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.carousel-content h3 {
  color: var(--primary-dark);
  margin-bottom: var(--space-sm);
}

.carousel-content p {
  color: var(--gray-700);
  margin-bottom: var(--space-md);
}

.carousel-nav {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  padding: 0 2rem;
  pointer-events: none;
  z-index: 100;
}

.carousel-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--white);
  border: none;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
  transition: var(--transition);
  pointer-events: auto;
}

.carousel-btn:hover {
  background-color: var(--primary-dark);
  color: var(--white);
  transform: scale(1.1);
}

.carousel-prev {
  margin-right: auto;
}

.carousel-next {
  margin-left: auto;
}

.carousel-indicators {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
  margin-top: var(--space-md);
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--gray-300);
  cursor: pointer;
  transition: var(--transition);
}

.carousel-dot.active {
  background-color: var(--primary);
  transform: scale(1.2);
}

@media (max-width: 991px) {
  .carousel-item {
    flex-direction: column;
  }
  
  .carousel-image,
  .carousel-content {
    flex: 0 0 100%;
  }
  
  .carousel-image img {
    height: 300px;
  }
  
  .carousel-nav {
    padding: 0 1rem;
  }
}

/* Header
========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: transparent;
  transition: var(--transition);
  padding: var(--space-sm) 0;
  background-color: white;
}

.header.scrolled {
  background-color: var(--white);
  box-shadow: var(--shadow-md);
  padding: var(--space-xs) 0;
}

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

.logo {
  display: flex;
  align-items: center;
}

.logo a {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.logo h1 {
  font-size: 1.8rem;
  margin: 0;
  color: var(--white);
  transition: var(--transition);
  line-height: 1;
}

.logo span {
  font-size: 0.8rem;
  color: var(--white);
  font-weight: 400;
  letter-spacing: 1px;
  transition: var(--transition);
}

.header.scrolled .logo h1,
.header.scrolled .logo span {
  color: var(--primary-dark);
}

.main-nav {
  display: flex;
}

.nav-links {
  display: flex;
  list-style: none;
  margin: 0;
}

.nav-link {
  padding: var(--space-xs) var(--space-sm);
  color: var(--black);
  font-weight: 500;
  position: relative;
}

.header.scrolled .nav-link {
  color: var(--gray-800);
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background-color: var(--accent);
  transition: var(--transition);
  transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 70%;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  cursor: pointer;
}

.mobile-menu-toggle span {
  display: block;
  height: 3px;
  width: 100%;
  background-color: var(--white);
  transition: var(--transition);
}

.header.scrolled .mobile-menu-toggle span {
  background-color: var(--primary-dark);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 60px;
  left: 0;
  width: 100%;
  background-color: var(--white);
  box-shadow: var(--shadow-md);
  z-index: 999;
  padding: var(--space-md) 0;
  transform: translateY(-100%);
  transition: var(--transition);
}

.mobile-nav.active {
  transform: translateY(0);
}

.mobile-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-nav-link {
  display: block;
  padding: var(--space-sm);
  color: var(--gray-800);
  font-weight: 500;
  text-align: center;
  border-bottom: 1px solid var(--gray-200);
}

.mobile-nav-link:hover {
  background-color: var(--gray-100);
  color: var(--primary);
}

/* Hero Section
========================================================================== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  background-image: url('img//pexels-photo-2760241.jpeg');
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  text-align: center;
  color: var(--white);
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to right, rgba(26, 58, 99, 0.9), rgba(26, 58, 99, 0.7));
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.hero-content h1 {
  color: var(--white);
  font-size: 3.5rem;
  margin-bottom: var(--space-md);
}

.hero-content p {
  font-size: 1.2rem;
  margin-bottom: var(--space-lg);
  opacity: 0.9;
}

.hero-btns {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
}

/* About Section
========================================================================== */
.about-content {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xl);
}

.about-text {
  flex: 1 1 400px;
}

.about-text .highlight {
  font-size: 1.2rem;
  color: var(--primary-dark);
  font-weight: 500;
  border-left: 4px solid var(--accent);
  padding-left: var(--space-sm);
  margin-bottom: var(--space-md);
}

.about-stats {
  flex: 1 1 400px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.stat-item {
  background-color: var(--white);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.stat-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--space-xs);
}

.stat-text {
  font-family: var(--font-heading);
  color: var(--gray-700);
}

/* Services Section
========================================================================== */
.services-tabs {
  margin-top: var(--space-lg);
}

.tabs-header {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.tab-btn {
  padding: var(--space-sm) var(--space-md);
  background-color: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-width: 120px;
}

.tab-btn i {
  font-size: 1.5rem;
  margin-bottom: var(--space-xs);
  color: var(--gray-600);
  transition: var(--transition);
}

.tab-btn span {
  font-family: var(--font-heading);
  font-weight: 500;
  color: var(--gray-700);
  transition: var(--transition);
}

.tab-btn:hover,
.tab-btn.active {
  background-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.tab-btn:hover i,
.tab-btn:hover span,
.tab-btn.active i,
.tab-btn.active span {
  color: var(--white);
}

.tabs-content {
  background-color: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.5s ease;
}

.tab-content h3 {
  color: var(--primary-dark);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
}

.tab-content h3::after {
  content: '';
  display: block;
  height: 2px;
  background-color: var(--accent);
  flex: 1;
  margin-left: var(--space-sm);
}

.service-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.service-list li {
  padding: var(--space-xs);
  background-color: var(--gray-100);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--primary);
  transition: var(--transition);
}

.service-list li:hover {
  background-color: var(--primary-light);
  color: var(--white);
  transform: translateX(5px);
}

/* Clients Section
========================================================================== */
.clients-intro {
  max-width: 800px;
  margin: 0 auto var(--space-xl);
  text-align: center;
}

.client-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-lg);
  align-items: center;
}

.client-logo {
  flex: 0 0 calc(25% - var(--space-lg));
  min-width: 150px;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: var(--transition);
  display: flex;
  justify-content: center;
}

.client-logo:hover {
  filter: grayscale(0);
  opacity: 1;
  transform: scale(1.05);
}

/* CTA Section
========================================================================== */
.cta {
  background-image: url('img/pexels-photo-1216589.jpeg');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  position: relative;
  padding: var(--space-xxl) 0;
}

.cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(26, 58, 99, 0.85);
}

.cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--white);
}

.cta-content h2 {
  color: var(--white);
  margin-bottom: var(--space-sm);
}

.cta-content p {
  margin-bottom: var(--space-md);
  font-size: 1.1rem;
}

/* Contact Section
========================================================================== */
.contact-content {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xl);
}

.contact-info {
  flex: 1 1 300px;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-md);
  background-color: var(--gray-100);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.contact-item:hover {
  background-color: var(--white);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.contact-item i {
  font-size: 1.5rem;
  color: var(--accent);
  margin-top: 5px;
}

.contact-item h3 {
  margin-bottom: var(--space-xs);
  font-size: 1.1rem;
}

.contact-item p {
  margin: 0;
  color: var(--gray-700);
}

.contact-form {
  flex: 1 1 500px;
  background-color: var(--white);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  position: relative;
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  background-color: var(--gray-100);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  background-color: var(--white);
  box-shadow: 0 0 0 3px rgba(44, 82, 130, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 150px;
}

.form-success {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--white);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.form-success.active {
  opacity: 1;
  visibility: visible;
}

.form-success i {
  font-size: 4rem;
  color: var(--success);
  margin-bottom: var(--space-md);
}

.form-success p {
  font-size: 1.2rem;
  text-align: center;
  color: var(--gray-800);
}

/* Footer
========================================================================== */
.footer {
  background-color: var(--primary-dark);
  color: var(--white);
  padding: var(--space-xl) 0 var(--space-sm);
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-logo {
  flex: 1 1 250px;
}

.footer-logo h2 {
  color: var(--white);
  font-size: 1.8rem;
  margin-bottom: 0;
}

.footer-logo p {
  color: var(--gray-400);
  font-size: 0.9rem;
}

.footer-links {
  flex: 2 1 500px;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xl);
}

.footer-section {
  flex: 1 1 150px;
}

.footer-section h3 {
  color: var(--white);
  margin-bottom: var(--space-md);
  font-size: 1.1rem;
}

.footer-section ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-section ul li {
  margin-bottom: var(--space-xs);
}

.footer-section ul li a {
  color: var(--gray-400);
  transition: var(--transition);
}

.footer-section ul li a:hover {
  color: var(--white);
  padding-left: 5px;
}

.social-links {
  display: flex;
  gap: var(--space-sm);
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: var(--white);
  transition: var(--transition);
}

.social-links a:hover {
  background-color: var(--accent);
  transform: translateY(-3px);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
  color: var(--gray-500);
  font-size: 0.9rem;
  margin: 0;
}

/* Back to Top Button
========================================================================== */
.back-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  background-color: var(--accent);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  z-index: 900;
}

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

.back-to-top:hover {
  background-color: var(--primary-dark);
}

/* Animations
========================================================================== */
.animate-fade-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease forwards;
}

.delay-1 {
  animation-delay: 0.2s;
}

.delay-2 {
  animation-delay: 0.4s;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}