:root {
    --primary-color: #4285f4;
    --secondary-color: #34a853;
    --danger-color: #ea4335;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    background-color: #f5f5f5;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.app-header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 0;
    margin-bottom: 2rem;
    box-shadow: var(--box-shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-header h1 {
    font-size: 1.8rem;
    font-weight: 500;
}

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

.admin-nav a {
    color: white;
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: background-color 0.3s;
}

.admin-nav a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.post-form {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-control:focus {
    border-color: var(--primary-color);
    outline: none;
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #3367d6;
}

.btn-danger {
    background-color: var(--danger-color);
}

.btn-danger:hover {
    background-color: #d33426;
}

.post-card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
    overflow: hidden;
}

.post-image {
    width: 100%;
    height: auto;
    max-height: 400px;
    object-fit: cover;
}

.post-content {
    padding: 1.5rem;
}

.post-text {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.post-meta {
    color: #666;
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
}

.login-container {
    max-width: 400px;
    margin: 5rem auto;
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.login-title {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.alert {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: var(--border-radius);
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

@media (min-width: 768px) {
    .post-card {
        max-width: 600px;
        margin: 0 auto 2rem;
    }
}

.loading {
    text-align: center;
    padding: 1rem;
    color: #666;
}