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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* Navigation */
header {
    background-color: #2c3e50;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}
.navbar {
    background-color: #2c3e50;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #ecf0f1;
}

.nav-links {
    display: flex;
    gap: 1rem;
}

.nav-btn {
    padding: 0.6rem 1.5rem;
    background-color: #34495e;
    color: #ecf0f1;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
    font-weight: 500;
}

.nav-btn:hover {
    background-color: #4a5f7f;
}

.nav-btn.active {
    background-color: #e74c3c;
}

/* Main Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 4rem 2rem;
    border-radius: 10px;
    margin-bottom: 3rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.tagline {
    font-size: 1.3rem;
    opacity: 0.95;
}

/* Welcome Section */
.welcome-section {
    background-color: white;
    padding: 3rem;
    border-radius: 10px;
    text-align: center;
    margin-bottom: 2rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.welcome-section h2 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 2rem;
}

.welcome-section > p {
    color: #555;
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

/* Feature Cards */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background-color: #f8f9fa;
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.feature-card h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.feature-card p {
    color: #666;
}

/* CTA Section */
.cta-section {
    background-color: white;
    padding: 3rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.cta-section h2 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 2rem;
}

.cta-section p {
    color: #555;
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    padding: 1rem 3rem;
    background-color: #e74c3c;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1.1rem;
    font-weight: bold;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.cta-button:hover {
    background-color: #c0392b;
    transform: scale(1.05);
}

/* Footer */
footer {
    background-color: #2c3e50;
    color: #ecf0f1;
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
}

/* error message */
.error-message {
    background-color: #fee;
    border: 1px solid #c00;
    color: #c00;
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 1rem;
    text-align: center;
}

.error-message p {
    margin: 0;
    font-weight: bold;
}
.error-message ul {
  padding-left: 0;
  list-style-position: inside;
}

/* success message */
.success-message {
    background-color: rgb(7, 243, 86);
    border: 1px solid rgb(1, 59, 19);
    color: rgb(47, 64, 161);
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 1rem;
    text-align: center;
}

.success-message p {
    margin: 0;
    font-weight: bold;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .tagline {
        font-size: 1rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
}

.profile-section h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 2rem;
}

.profile-section .card {
    background-color: white;
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.profile-section .card h2 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.8rem;
    border-bottom: 1px solid #eee;
    padding-bottom: 0.5rem;
}

.profile-section .card h3 {
    color: #34495e;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.profile-section label {
    display: block;
    margin-top: 1rem;
    margin-bottom: 0.3rem;
    font-weight: 500;
}

.profile-section input[type="text"],
.profile-section input[type="password"],
.profile-section input[type="email"],
.profile-section input[type="color"] {
    width: 100%;
    padding: 0.6rem 1rem;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.profile-section .btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background-color: #e74c3c;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: bold;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.profile-section .btn:hover {
    background-color: #c0392b;
    transform: scale(1.02);
}
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
    padding: 1rem 0;
}

.pagination-btn {
    padding: 0.5rem 1rem;
    background-color: #4CAF50;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.pagination-btn:hover:not(.disabled) {
    background-color: #45a049;
}

.pagination-btn.disabled {
    background-color: #ccc;
    cursor: not-allowed;
    color: #666;
}

.page-info {
    color: #666;
    font-weight: 500;
}