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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    position: relative;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    animation: float 20s linear infinite;
    z-index: -1;
}

@keyframes float {
    0% { transform: translate(0, 0); }
    100% { transform: translate(20px, 20px); }
}

/* Navbar Styles */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(14, 16, 28, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: #fff;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { text-shadow: 0 0 20px rgba(255, 255, 255, 0.3); }
    to { text-shadow: 0 0 30px rgba(102, 126, 234, 0.6), 0 0 40px rgba(102, 126, 234, 0.4); }
}

.navbar nav {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.navbar nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    padding: 0.8rem 1.2rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.navbar nav a:hover {
    background: rgba(102, 126, 234, 0.8);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-sm {
    padding: 0.8rem 1.5rem !important;
    background: linear-gradient(45deg, #00aaff, #0088cc) !important;
    border: none;
    border-radius: 25px !important;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 170, 255, 0.3);
}

.btn-sm:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 170, 255, 0.4);
}

.btn-secondary {
    background: linear-gradient(45deg, #ffaa00, #ff8800) !important;
    box-shadow: 0 4px 15px rgba(255, 170, 0, 0.3) !important;
}

.btn-secondary:hover {
    box-shadow: 0 8px 25px rgba(255, 170, 0, 0.4) !important;
}

.user-info {
    margin-left: 1rem;
    color: #ffd700;
    font-weight: 600;
    text-shadow: 0 2px 10px rgba(255, 215, 0, 0.3);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 8rem 2rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 100%);
    color: white;
    position: relative;
    overflow: hidden;
    min-height: 70vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
                radial-gradient(circle at 40% 80%, rgba(120, 219, 255, 0.3) 0%, transparent 50%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 10;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    animation: slideInUp 1s ease-out;
}

.hero p {
    font-size: 1.4rem;
    margin-bottom: 3rem;
    position: relative;
    z-index: 10;
    opacity: 0.95;
    animation: slideInUp 1s ease-out 0.2s both;
}

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

.hero .btn {
    display: inline-block;
    padding: 1.2rem 3rem;
    background: linear-gradient(45deg, #fff, #f0f0f0);
    color: #667eea;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    position: relative;
    z-index: 10;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    animation: slideInUp 1s ease-out 0.4s both;
}

.hero .btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #ffffff, #e8e8e8);
}

/* Features Section */
.features {
    padding: 6rem 2rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #2c3e50;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.feature-desc {
    color: #666;
    line-height: 1.6;
}

/* Footer */
.footer {
    text-align: center;
    padding: 3rem 2rem;
    background: rgba(14, 16, 28, 0.95);
    backdrop-filter: blur(20px);
    color: white;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer p {
    font-size: 1rem;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    .navbar nav {
        justify-content: center;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .hero {
        padding: 4rem 1rem;
    }

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

/* Loading Animation */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    animation: fadeOut 2s ease-in-out 1s forwards;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

@keyframes fadeOut {
    to {
        opacity: 0;
        visibility: hidden;
    }
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.9rem;
  background: #555;
  color: white;
  border: none;
  border-radius: 6px;
  text-decoration: none;
  margin: 2px;
}

.btn-sm.btn-secondary {
  background: #007bff;
}

.btn-sm.btn-danger {
  background: #dc3545;
}