:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-light: #818cf8;
  --secondary: #06b6d4;
  --secondary-dark: #0891b2;
  --dark: #1e293b;
  --darker: #0f172a;
  --light: #f8fafc;
  --gray: #64748b;
  --gray-light: #cbd5e1;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --card-bg: rgba(30, 41, 59, 0.7);
  --card-border: rgba(99, 102, 241, 0.2);
  --header-height: 80px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background: linear-gradient(135deg, var(--darker) 0%, var(--dark) 100%);
  color: var(--light);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 10% 20%, rgba(79, 70, 229, 0.1) 0%, transparent 20%),
    radial-gradient(circle at 90% 10%, rgba(6, 182, 212, 0.1) 0%, transparent 20%),
    radial-gradient(circle at 50% 80%, rgba(79, 70, 229, 0.05) 0%, transparent 20%);
  z-index: -1;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(30, 41, 59, 0.5);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(to bottom, var(--primary), var(--secondary));
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(to bottom, var(--primary-dark), var(--secondary-dark));
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: 3.5rem;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: 2.5rem;
  color: var(--light);
  position: relative;
  display: inline-block;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
}

h3 {
  font-size: 1.5rem;
  color: var(--light);
}

p {
  color: var(--gray-light);
  margin-bottom: 1rem;
}

/* ===== LAYOUT ===== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title h2 {
  font-size: 2.5rem;
}

.section-title p {
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  outline: none;
}

.btn-primary {
  background: linear-gradient(90deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 15px rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.6);
}

.btn-secondary {
  background: transparent;
  color: var(--light);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  background: rgba(79, 70, 229, 0.1);
  transform: translateY(-3px);
}

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

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* ===== HEADER ===== */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  z-index: 1000;
  transition: all 0.3s ease;
}

header.scrolled {
  height: 70px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  transition: transform 0.5s ease;
}

.logo:hover .logo-icon {
  transform: rotate(15deg) scale(1.1);
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--light);
}

.logo-text a {
  text-decoration: none;
  color: inherit;
}

nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

nav a {
  color: var(--gray-light);
  text-decoration: none;
  font-weight: 500;
  padding: 10px 16px;
  border-radius: 6px;
  transition: all 0.3s ease;
  position: relative;
}

nav a:hover {
  color: var(--light);
  background: rgba(79, 70, 229, 0.1);
}

nav a.active {
  color: var(--primary);
}

nav a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

.account-btn {
  background: linear-gradient(90deg, var(--primary), var(--primary-dark));
  color: white;
  padding: 10px 20px;
  border-radius: 8px;
  margin-left: 10px;
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3);
}

.account-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(79, 70, 229, 0.5);
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.hamburger div {
  width: 25px;
  height: 3px;
  background: var(--light);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* ===== SIDEBAR ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: -280px;
  width: 280px;
  height: 100%;
  background: var(--darker);
  border-right: 1px solid rgba(255, 255, 255, 0.05);
  padding: 80px 20px 30px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: left 0.3s ease;
  z-index: 999;
  overflow-y: auto;
}

.sidebar.active {
  left: 0;
}

.sidebar a {
  color: var(--gray-light);
  text-decoration: none;
  font-weight: 500;
  padding: 12px 16px;
  border-radius: 8px;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar a:hover, .sidebar a.active {
  color: var(--light);
  background: rgba(79, 70, 229, 0.1);
}

.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
  z-index: 998;
}

.overlay.active {
  display: block;
}

/* ===== HERO SECTION ===== */
.hero {
  padding: 140px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(79, 70, 229, 0.1) 0%, transparent 70%);
  animation: pulse 15s infinite linear;
  z-index: -1;
}

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

.hero-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
}

.hero-content {
  flex: 1;
  max-width: 600px;
}

.hero-content h1 {
  font-size: 3.5rem;
  margin-bottom: 1.5rem;
  line-height: 1.1;
}

.hero-content p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  color: var(--gray-light);
}

.hero-buttons {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: 30px;
  margin-top: 30px;
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  display: block;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--gray);
}

.hero-card {
  flex: 0 0 400px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(10px);
}

.hero-card h3 {
  margin-bottom: 20px;
  color: var(--light);
  display: flex;
  align-items: center;
  gap: 10px;
}

.hero-card h3 i {
  color: var(--primary);
}

.info-item {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.info-item:last-child {
  border-bottom: none;
}

.info-label {
  color: var(--gray);
}

.info-value {
  color: var(--light);
  font-weight: 600;
}

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

/* ===== FEATURES SECTION ===== */
.features {
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 30px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(6, 182, 212, 0.1));
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
  color: white;
}

.feature-card h3 {
  margin-bottom: 15px;
  font-size: 1.3rem;
}

.feature-card p {
  color: var(--gray-light);
  font-size: 0.95rem;
}

/* ===== DEVELOPER SECTION ===== */
.developer {
  text-align: center;
}

.developer-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 40px;
  max-width: 400px;
  margin: 0 auto;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
}

.developer-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.developer-img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 20px;
  border: 4px solid var(--primary);
  box-shadow: 0 5px 15px rgba(79, 70, 229, 0.3);
}

.developer-card h3 {
  font-size: 1.5rem;
  margin-bottom: 10px;
}

.developer-card p {
  color: var(--gray-light);
  margin-bottom: 20px;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 15px;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(79, 70, 229, 0.1);
  color: var(--primary);
  transition: all 0.3s ease;
}

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

/* ===== FOOTER ===== */
footer {
  background: var(--darker);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 60px 0 30px;
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.footer-main {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 40px;
}

.footer-brand {
  flex: 1;
  min-width: 250px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 15px;
}

.footer-logo img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}

.footer-logo span {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--light);
}

.footer-brand p {
  max-width: 300px;
  color: var(--gray);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
}

.footer-column {
  min-width: 150px;
}

.footer-column h4 {
  font-size: 1.1rem;
  margin-bottom: 20px;
  color: var(--light);
  position: relative;
}

.footer-column h4::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

.footer-column a {
  display: block;
  color: var(--gray);
  text-decoration: none;
  margin-bottom: 10px;
  transition: all 0.3s ease;
}

.footer-column a:hover {
  color: var(--primary);
  transform: translateX(5px);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--gray);
  font-size: 0.9rem;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

.footer-bottom-links a {
  color: var(--gray);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

/* ===== RESPONSIVE STYLES ===== */
@media (max-width: 992px) {
  h1 {
    font-size: 2.8rem;
  }
  
  h2 {
    font-size: 2.2rem;
  }
  
  .hero-container {
    flex-direction: column;
    text-align: center;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .hero-card {
    flex: 1;
    max-width: 500px;
    width: 100%;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 2.3rem;
  }
  
  h2 {
    font-size: 1.8rem;
  }
  
  nav {
    display: none;
  }
  
  .hamburger {
    display: flex;
  }
  
  .footer-main {
    flex-direction: column;
    gap: 40px;
  }
  
  .footer-links {
    width: 100%;
    justify-content: space-between;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 576px) {
  section {
    padding: 60px 0;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.6rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .hero-buttons .btn {
    width: 100%;
    max-width: 250px;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 20px;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    flex-direction: column;
    gap: 30px;
  }
  
  .footer-column {
    min-width: 100%;
  }
}

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

.fade-in {
  animation: fadeIn 0.6s ease forwards;
}

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

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

.delay-3 {
  animation-delay: 0.6s;
}