/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #fff;
    background: #1a1a1a;
}

.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header and Navigation */
header {
    background: #2a2a2a;
    padding: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

.nav-link {
    color: #fff;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.nav-link:hover {
    background: #3a3a3a;
}

.user-info {
    color: #fff;
    padding: 0.5rem 1rem;
}

.bytes {
    color: #888;
    font-size: 0.9em;
}

/* Main Content */
main {
    flex: 1;
    padding: 2rem 1rem;
}

/* Footer */
footer {
    background: #2a2a2a;
    padding: 1rem;
    text-align: center;
    color: #888;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    color: #fff;
}

p {
    margin-bottom: 1rem;
}

/* Buttons */
button {
    background: #2a2a2a;
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover:not(:disabled) {
    background: #3a3a3a;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Forms */
input, select, textarea {
    background: #2a2a2a;
    color: #fff;
    border: 1px solid #3a3a3a;
    padding: 0.5rem;
    border-radius: 4px;
    width: 100%;
    margin-bottom: 1rem;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: #4a4a4a;
}

/* Messages */
.message {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #2a2a2a;
    color: #fff;
    padding: 12px 24px;
    border-radius: 4px;
    animation: fadeInOut 3s ease-in-out;
    z-index: 1000;
}

@keyframes fadeInOut {
    0% { opacity: 0; transform: translateY(-20px); }
    10% { opacity: 1; transform: translateY(0); }
    90% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(-20px); }
}

/* Responsive Design */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-link {
        width: 100%;
        text-align: center;
    }
    
    .user-info {
        width: 100%;
        text-align: center;
    }
}