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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.98);
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    border: 1px solid #e9ecef;
}

.nav {
    background: linear-gradient(135deg, #000000 0%, #212529 100%);
    color: white;
    padding: 15px 20px;
    margin: -20px -20px 25px -20px;
    border-radius: 15px 15px 0 0;
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.nav a {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.nav a:hover {
    background: rgba(220, 53, 69, 0.8);
    transform: translateY(-2px);
}

header {
    background: linear-gradient(135deg, #000000 0%, #212529 100%);
    color: white;
    padding: 40px;
    border-radius: 15px;
    margin-bottom: 30px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0;
}

.logo-link img {
    height: 60px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    margin-right: 15px;
}

header h1 .logo {
    display: inline-block;
    margin: 0;
    font-size: 2.5em;
}

.page-header {
    background: linear-gradient(135deg, #000000 0%, #212529 100%);
    color: white;
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 25px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

h1 {
    font-size: 2.5em;
    margin-bottom: 15px;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

h2 {
    font-size: 1.8em;
    margin-bottom: 10px;
    color: #333;
}

h3 {
    font-size: 1.4em;
    margin-bottom: 10px;
    color: #333;
}

.subtitle {
    font-size: 1.2em;
    margin-bottom: 25px;
    opacity: 0.9;
}

.nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 20px;
}

.nav-btn {
    background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
    color: white;
    text-decoration: none;
    padding: 12px 24px;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.nav-btn:hover {
    background: linear-gradient(135deg, #bb2d3b 0%, #a02331 100%);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(220, 53, 69, 0.4);
}

.nav-btn.admin {
    background: linear-gradient(135deg, #000000 0%, #495057 100%);
    border: 2px solid #dc3545;
}

.content {
    text-align: center;
    padding: 40px 20px;
}

.back-button {
    background: linear-gradient(135deg, #000000 0%, #495057 100%);
    color: white;
    text-decoration: none;
    padding: 12px 24px;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 25px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
}

.back-button:hover {
    background: linear-gradient(135deg, #212529 0%, #6c757d 100%);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.home-button {
    background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
    color: white;
    text-decoration: none;
    padding: 12px 24px;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin: 10px;
    box-shadow: 0 3px 10px rgba(220, 53, 69, 0.3);
}

.home-button:hover {
    background: linear-gradient(135deg, #bb2d3b 0%, #a02331 100%);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(220, 53, 69, 0.4);
}

.back-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 30px;
}

.empty-state {
    text-align: center;
    padding: 50px 20px;
    color: #6c757d;
    background: rgba(248, 249, 250, 0.5);
    border-radius: 15px;
    margin: 20px 0;
}

.empty-state h3 {
    font-size: 1.5em;
    margin-bottom: 15px;
    color: #6c757d;
}

.error-icon {
    font-size: 4em;
    margin-bottom: 20px;
    color: #dc3545;
}

.error-title {
    color: #dc3545;
    font-size: 2em;
    margin-bottom: 15px;
}

.error-message {
    color: #6c757d;
    font-size: 1.1em;
    margin-bottom: 30px;
    line-height: 1.6;
}