/* Base Styles */
:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --accent-color: #4895ef;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --success-color: #4bb543;
    --warning-color: #f0ad4e;
    --danger-color: #d9534f;
    --gray-color: #6c757d;
    --light-gray: #e9ecef;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #f5f7fa;
}

/* Layout */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.content-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin: 20px 0;
}

.sidebar {
    flex: 1;
    min-width: 250px;
    max-width: 300px;
}

.main-content {
    flex: 3;
    min-width: 300px;
}

/* Header */
.app-header {
    text-align: center;
    padding: 30px 0;
    margin-bottom: 20px;
}

.app-header h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--gray-color);
}

/* Form Elements */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark-color);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(72, 149, 239, 0.2);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    gap: 8px;
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--gray-color);
    color: white;
}

.btn-secondary:hover {
    background-color: #5a6268;
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--gray-color);
    color: var(--dark-color);
}

.btn-outline:hover {
    background-color: var(--light-gray);
    transform: translateY(-2px);
}

.btn-action {
    background-color: var(--light-color);
    color: var(--dark-color);
    border: 1px solid var(--light-gray);
}

.btn-action:hover {
    background-color: #e2e6ea;
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.button-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.action-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* Tool Container */
.tool-container {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--box-shadow);
}

.input-section, .result-section {
    margin-bottom: 30px;
}

/* Article Container */
.article-container {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 20px;
    margin-top: 20px;
    box-shadow: var(--box-shadow);
}

.article-container h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.article-container h4 {
    color: var(--secondary-color);
    margin: 15px 0 10px;
    font-size: 1.1rem;
}

.article-container p, .article-container ul {
    margin-bottom: 15px;
    color: var(--dark-color);
}

.article-container ul {
    padding-left: 20px;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--success-color);
    color: white;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
    z-index: 1000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* Ad Containers */
.ad-container {
    background-color: var(--light-gray);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.ad-placeholder {
    padding: 20px;
    color: var(--gray-color);
    text-align: center;
}

.top-banner {
    height: 90px;
    margin-bottom: 20px;
}

.sidebar-ad {
    height: 250px;
}

.in-content-ad {
    height: 100px;
    margin-bottom: 20px;
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
    color: var(--gray-color);
    font-size: 0.9rem;
    border-top: 1px solid var(--light-gray);
}

/* Responsive Design */
@media (max-width: 768px) {
    .content-wrapper {
        flex-direction: column;
    }

    .sidebar {
        max-width: 100%;
    }

    .app-header h1 {
        font-size: 2rem;
    }

    .button-group, .action-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .app-header h1 {
        font-size: 1.8rem;
    }

    .form-control {
        padding: 10px 12px;
    }
}