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

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

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--text-dark);
  background-color: var(--bg-light);
  transition: background-color var(--transition-normal);
  overflow-x: hidden;
  position: relative;
}

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

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

ul {
  list-style: none;
}

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

/* Container */
.container {
  max-width: var(--container-width);
  width: 90%;
  margin: 0 auto;
}

/* Section Styles */
.section {
  padding: var(--section-padding);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-header h2 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  position: relative;
  display: inline-block;
}

.section-line {
  width: 80px;
  height: 4px;
  background: var(--primary-color);
  margin: 0 auto;
  border-radius: var(--border-radius-full);
}

/* Header */
#header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-fixed);
  background-color: transparent;
  transition: all var(--transition-normal);
  padding: 1.5rem 0;
}

#header.scrolled {
  background-color: var(--bg-light);
  box-shadow: var(--shadow-md);
  padding: 1rem 0;
}

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

nav {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-dark);
}

.nav-menu {
  display: flex;
  align-items: center;
}

.nav-menu li {
  margin-left: var(--spacing-lg);
}

.nav-link {
  color: var(--text-dark);
  font-weight: 500;
  position: relative;
  padding: 0.5rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background-color: var(--primary-color);
  transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--text-dark);
  margin-bottom: 5px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.theme-toggle {
  cursor: pointer;
  margin-left: var(--spacing-lg);
}

.theme-toggle i {
  font-size: var(--font-size-md);
  color: var(--text-dark);
}

.theme-toggle .fa-sun {
  display: none;
}

.dark-mode .theme-toggle .fa-moon {
  display: none;
}

.dark-mode .theme-toggle .fa-sun {
  display: block;
}

/* Hero Section */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 6rem;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.hero-text h1 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.hero-text h2 {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: var(--text-muted);
}

.hero-text p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xl);
  max-width: 500px;
}

.highlight {
  color: var(--primary-color);
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

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

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

.hero-image:hover img {
  transform: scale(1.05);
}

.social-icons {
  display: flex;
  gap: var(--spacing-md);
}

.social-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-gray);
  color: var(--text-dark);
  transition: all var(--transition-normal);
}

.social-icon:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-3px);
}

.scroll-down {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
}

.scroll-down a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--bg-light);
  color: var(--primary-color);
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.scroll-down a:hover {
  transform: translateY(-5px);
}

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

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

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

.about-image:hover img {
  transform: scale(1.05);
}

.about-text h3 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--primary-color);
}

.about-text p {
  margin-bottom: var(--spacing-lg);
}

.about-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.info-item {
  margin-bottom: var(--spacing-sm);
}

.info-title {
  font-weight: 600;
  color: var(--text-muted);
}

/* Footer */
#footer {
  background-color: var(--bg-gray);
  padding: var(--spacing-xl) 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
}

.footer-logo h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-dark);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-links a {
  color: var(--text-dark);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary-color);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background-color: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: var(--z-tooltip);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-md);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--primary-dark);
  transform: translateY(-5px);
}

/* Preloader */
.preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-light);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: var(--z-modal);
  transition: opacity var(--transition-normal);
}

.preloader.fade-out {
  opacity: 0;
  visibility: hidden;
}

.loader {
  width: 50px;
  height: 50px;
  border: 5px solid var(--bg-gray);
  border-top: 5px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Custom Cursor */
.cursor {
  position: fixed;
  width: 8px;
  height: 8px;
  background-color: var(--primary-color);
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: var(--z-tooltip);
  transition: width 0.2s, height 0.2s;
  opacity: 1;
  display: none;
}

.cursor-follower {
  position: fixed;
  width: 40px;
  height: 40px;
  border: 2px solid var(--primary-color);
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: var(--z-tooltip);
  transition: all 0.2s ease-out;
  opacity: 0.5;
  display: none;
}

@media (min-width: 1024px) {
  .cursor, .cursor-follower {
    display: block;
  }
}