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

body {
    font-family: Arial, sans-serif;
    background: #f5f5f5;
}

body.login-page {
    background: linear-gradient(135deg, #ff6b35 0%, #f7931e 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

#pdf-viewer {
    width: 100%;
    height: 100vh;
    overflow: hidden;
    background: #525252;
}

#pdf-frame {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}

.admin-container {
    max-width: 800px;
    width: 100%;
    margin: 50px auto;
    padding: 40px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.login-container {
    max-width: 400px;
    width: 100%;
    margin: 0 auto;
    padding: 40px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.admin-header {
    text-align: center;
    margin-bottom: 30px;
    color: #ff6b35;
    font-size: 28px;
    font-weight: bold;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #333;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.btn-primary {
    width: 100%;
    padding: 12px;
    background: #ff6b35;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
}

.btn-primary:hover {
    background: #e55a2b;
}

.message {
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 4px;
    text-align: center;
}

.message.error {
    background: #fee;
    color: #c33;
}

.message.success {
    background: #efe;
    color: #3c3;
}

.admin-nav {
    text-align: center;
    margin-bottom: 20px;
}

.admin-nav a {
    color: #ff6b35;
    text-decoration: none;
    margin: 0 10px;
}

.admin-nav a:hover {
    text-decoration: underline;
}

.section {
    margin-bottom: 30px;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 4px;
}

.section h2 {
    color: #ff6b35;
    margin-bottom: 15px;
}

.users-list {
    list-style: none;
}

.users-list li {
    padding: 10px;
    background: white;
    margin-bottom: 10px;
    border-radius: 4px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logout-btn {
    background: #666;
    padding: 6px 12px;
    font-size: 14px;
}

.logout-btn:hover {
    background: #555;
}