@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap');

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

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    background-color: #f9f9f9;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    color: #118bee;
    font-weight: 700;
}

.logo-link {
    text-decoration: none;
}

nav ul {
    list-style: none;
    display: flex;
}

nav ul li a {
    text-decoration: none;
    color: #555;
    font-weight: 600;
    padding: 0.5rem 1rem;
    transition: color 0.3s ease;
}

nav ul li a:hover, nav ul li a.active {
    color: #118bee;
}

main {
    padding: 2rem 0;
}

.hero {
    text-align: center;
    margin-bottom: 2.5rem;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.hero p {
    font-size: 1.1rem;
    color: #777;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.content-card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.content-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.12);
}

.content-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    background-color: #eee;
}

.content-card-body {
    padding: 1rem;
}

.content-card-body h3 {
    font-size: 1.1rem;
    margin: 0;
    line-height: 1.4;
}

.content-card a {
    text-decoration: none;
    color: #333;
}

.loader {
    border: 5px solid #f3f3f3; 
    border-top: 5px solid #118bee; 
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
    display: none; 
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
    background-color: #333;
    color: #fff;
}


.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
    cursor: pointer;
    width: 30px;
    height: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
    display: block;
    background-color: #333;
    height: 3px;
    width: 25px;
    border-radius: 2px;
    position: relative;
    transition: all 0.3s ease-in-out;
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
    content: '';
    position: absolute;
}

.nav-toggle-label span::before {
    top: -8px;
}

.nav-toggle-label span::after {
    top: 8px;
}

.nav-toggle:checked + .nav-toggle-label span {
    background-color: transparent;
}

.nav-toggle:checked + .nav-toggle-label span::before {
    transform: rotate(45deg);
    top: 0;
}

.nav-toggle:checked + .nav-toggle-label span::after {
    transform: rotate(-45deg);
    top: 0;
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    .logo {
        font-size: 1.5rem;
    }
    .nav-toggle-label {
        display: flex;
    }
    nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: #fff;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        transform: scaleY(0); 
        transform-origin: top;
        transition: transform 0.3s ease-in-out;
    }
    nav ul {
        flex-direction: column;
        padding: 1rem 0;
    }
    nav ul li {
        width: 100%;
        text-align: center;
        margin-left: 0; 
    }
    nav ul li a {
        padding: 1rem;
        display: block;
    }
    .nav-toggle:checked ~ nav {
        transform: scaleY(1);
    }
    .hero h2, .main-article h1 { font-size: 1.8rem; }
    .hero p, .article-content p { font-size: 1rem; }
    .main-article { padding: 1.5rem; }
    .section-title { font-size: 1.5rem; }

    .download-buttons-container {
        flex-direction: column; 
        width: 100%;
    }
}


.main-article {
    background-color: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    margin-bottom: 3rem;
}

.main-article h1 {
    font-size: 2.8rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.detail-image {
    margin-bottom: 1.5rem; 
}

.detail-image img {
    width: 100%;
    height: auto; 
    max-height: 500px;
    object-fit: cover;
    border-radius: 8px;
    background-color: #eee;
}

.article-content {
    margin-top: 2rem; 
}

.article-content p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #444;
}

.article-content strong {
    color: #118bee;
}

.section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 2rem;
    border-bottom: 2px solid #eee;
    padding-bottom: 1rem;
}


.download-buttons-container {
    display: flex;
    justify-content: center; 
    gap: 1rem; 
    margin-bottom: 1rem; 
}

.download-button {
    display: inline-block;
    background-color: #118bee;
    color: #fff;
    padding: 0.8rem 1.8rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    transition: background-color 0.3s ease, transform 0.2s ease;
    border: none;
    cursor: pointer;
}

.download-button:hover {
    background-color: #0b78d1; 
    transform: scale(1.05); 
}

@media (min-width: 769px) {
    .nav-toggle-label {
        display: none !important;
    }
    nav {
        display: block; 
    }
}

.footer-links {
    margin-bottom: 1rem;
}

.footer-links a {
    color: #bbb;
    text-decoration: none;
    margin: 0 10px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #fff;
    text-decoration: underline;
}

.contact-email {
    color: #118bee;
    text-decoration: none;
    font-weight: normal;
}

.contact-email:hover {
    text-decoration: underline;
}

.tool-container {
    text-align: center;
    padding: 2rem;
}

.tool-description {
    max-width: 600px;
    margin: 0 auto 2rem auto;
    color: #555;
    line-height: 1.8;
}

.tool-button {
    background-color: #28a745; 
    color: #fff;
    border: none;
    padding: 1rem 2.5rem;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.tool-button:hover:not(:disabled) {
    background-color: #218838;
    transform: scale(1.05);
}

.tool-button:disabled {
    background-color: #aaa;
    cursor: not-allowed;
}

.tool-status {
    margin-top: 2rem;
    padding: 1rem;
    background-color: #e9ecef;
    border-radius: 5px;
    font-family: monospace;
    font-size: 1rem;
}

.tool-settings {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    background-color: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    flex-wrap: wrap; 
}

.setting-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.setting-item label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #555;
}

.tool-input {
    padding: 0.7rem;
    font-size: 1rem;
    border-radius: 5px;
    border: 1px solid #ccc;
    width: 200px; 
}

@media (max-width: 768px) {
    .tool-input {
        width: 100%;
    }
}