:root {
    --bg-primary: #121212;
    --bg-glass: rgba(30, 30, 30, 0.7);
    --bg-noise-gradient: linear-gradient(180deg, rgba(255,255,255,0.03) 0%, rgba(255,255,255,0) 100%);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #EAEAEA;
    --text-secondary: #A0A0A0;
    --text-dark: #121212;
    --accent-gold: #D4AF37;
    --accent-gold-dark: #B8860B;
    --shadow-color: rgba(0, 0, 0, 0.37);
    --accent-shadow-color: rgba(212, 175, 55, 0.2);
    --accent-shadow-hover-color: rgba(212, 175, 55, 0.3);
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', sans-serif;
}
html[data-theme="light"] {
    --bg-primary: #f5f7fa;
    --bg-glass: rgba(255, 255, 255, 0.7);
    --bg-noise-gradient: linear-gradient(180deg, rgba(0,0,0,0.02) 0%, rgba(0,0,0,0) 100%);
    --border-color: #e2e8f0;
    --text-primary: #1a202c;
    --text-secondary: #718096;
    --text-dark: #121212;
    --accent-gold: #e53e3e;
    --accent-gold-dark: #c53030;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --accent-shadow-color: rgba(229, 62, 62, 0.2);
    --accent-shadow-hover-color: rgba(229, 62, 62, 0.3);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    background-image: var(--bg-noise-gradient), url('https://www.transparenttextures.com/patterns/dark-matter.png');
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.4s ease;
}
.site-header {
    width: 100%; padding: 20px 0;
    position: absolute; top: 0; left: 0;
    z-index: 900;
}
.header-container {
    width: 100%; max-width: 1200px;
    margin: 0 auto; padding: 0 20px;
    display: flex; justify-content: space-between; align-items: center;
}
.site-branding a { font-family: var(--font-serif); font-size: 24px; font-weight: 700; color: var(--text-primary); text-decoration: none; }
.main-nav {
    display: flex; align-items: center; gap: 8px;
    background: var(--bg-glass);
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    padding: 8px; border-radius: 12px;
}
.main-nav a {
    color: var(--text-secondary); text-decoration: none;
    padding: 10px 18px; border-radius: 8px;
    font-weight: 600; font-size: 15px;
    transition: all 0.3s ease;
}
.main-nav a:hover { color: var(--text-primary); background-color: rgba(255, 255, 255, 0.1); }
html[data-theme="light"] .main-nav a:hover { background-color: rgba(0, 0, 0, 0.05); }
.main-nav a.active { color: #fff; background: var(--accent-gold); }
html[data-theme="light"] .main-nav a.active { color: #fff; }
.main-nav .btn-donate { background-color: var(--accent-gold-dark); color: #fff; padding: 8px 16px; }
.main-nav .btn-donate:hover { background-color: var(--accent-gold); color: #fff; transform: translateY(-2px); box-shadow: 0 4px 15px rgba(0,0,0,0.2); }
html[data-theme="light"] .main-nav .btn-donate { background-color: #3182ce; }
html[data-theme="light"] .main-nav .btn-donate:hover { background-color: #2b6cb0; }
.mobile-nav-toggle { display: none; }
.theme-switcher {
    position: fixed; top: 25px; right: 25px;
    background-color: var(--bg-glass);
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    width: 45px; height: 45px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer; z-index: 1000;
}
.theme-switcher svg { width: 22px; height: 22px; color: var(--text-secondary); }
.theme-switcher .icon-sun { display: none; }
.theme-switcher .icon-moon { display: block; }
html[data-theme="light"] .theme-switcher .icon-sun { display: block; }
html[data-theme="light"] .theme-switcher .icon-moon { display: none; }
.glass-effect {
    background: var(--bg-glass);
    backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    box-shadow: 0 8px 32px 0 var(--shadow-color);
    transition: background-color 0.4s ease, border-color 0.4s ease;
}
.main-container {
    flex-grow: 1;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding-top: 100px; /* Memberi ruang untuk header */
}
.view-container {
    width: 100%; display: flex; align-items: center; justify-content: center;
    padding: 20px; animation: fadeIn 0.8s ease-out;
}
@keyframes fadeIn { from { opacity: 0; transform: scale(0.98); } to { opacity: 1; transform: scale(1); } }
.btn-primary {
    background: linear-gradient(45deg, var(--accent-gold-dark), var(--accent-gold));
    color: #fff; font-size: 16px; font-weight: 600;
    padding: 18px 40px; border: none; border-radius: 12px;
    cursor: pointer; text-decoration: none; transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--accent-shadow-color);
}
html[data-theme="light"] .btn-primary { color: #fff; }
.btn-primary:hover { transform: translateY(-3px) scale(1.05); box-shadow: 0 6px 20px var(--accent-shadow-hover-color); }
.btn-secondary {
    background: none; border: 1px solid #444; color: #888;
    padding: 10px 20px; border-radius: 8px; cursor: pointer;
    font-weight: 500; transition: all 0.2s;
}
.btn-secondary:hover { background-color: rgba(255,255,255,0.05); }
html[data-theme="light"] .btn-secondary { color: var(--text-secondary); border-color: var(--border-color); }
html[data-theme="light"] .btn-secondary:hover { color: var(--text-primary); background: rgba(0,0,0,0.05); }
.tool-hub-container { width: 100%; max-width: 1100px; }
.hub-header { text-align: center; max-width: 800px; margin: 40px auto 60px auto; }
.hub-header h1 { font-family: var(--font-serif); font-size: 52px; color: var(--text-primary); line-height: 1.2; }
.hub-header p { font-size: 18px; color: var(--text-secondary); margin-top: 20px; line-height: 1.7; }
.tool-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 30px; }
.tool-card { padding: 30px; text-align: left; text-decoration: none; position: relative; overflow: hidden; transition: transform 0.3s ease, border-color 0.3s ease; }
.tool-card:hover { transform: translateY(-8px); border-color: var(--accent-gold); }
.tool-card h3 { color: var(--text-primary); font-size: 20px; font-weight: 600; margin-bottom: 10px; transition: color 0.3s ease; }
.tool-card:hover h3 { color: var(--accent-gold); }
.tool-card p { color: var(--text-secondary); font-size: 15px; line-height: 1.6; }
.tool-card.disabled { opacity: 0.5; pointer-events: none; }
.tool-badge { position: absolute; top: 15px; right: -30px; background-color: var(--accent-gold); color: #fff; padding: 4px 30px; font-size: 12px; font-weight: 700; transform: rotate(45deg); }
.tool-icon { width: 48px; height: 48px; margin-bottom: 20px; background-color: var(--accent-gold); border-radius: 12px; display: flex; align-items: center; justify-content: center; transition: all 0.3s ease; }
.tool-icon svg { width: 28px; height: 28px; color: #fff; }
html[data-theme="light"] .tool-icon svg { color: var(--text-dark); }
.tool-card:hover .tool-icon { background: #fff; }
html[data-theme="light"] .tool-card:hover .tool-icon { background: var(--accent-gold); }
.tool-card:hover .tool-icon svg { color: var(--accent-gold); }
html[data-theme="light"] .tool-card:hover .tool-icon svg { color: #fff; }
#landing-view .upload-box { width: 100%; max-width: 650px; text-align: center; padding: 70px 50px; }
#landing-view .upload-box.drag-over { border-color: var(--accent-gold); transform: scale(1.02); }
#landing-view h1 { font-family: var(--font-serif); font-size: 52px; letter-spacing: 1.5px; color: var(--text-primary); margin-bottom: 15px; transition: color 0.4s ease; }
#landing-view p { font-size: 18px; color: var(--text-secondary); margin-bottom: 40px; transition: color 0.4s ease; }
#landing-view .drop-text { font-size: 14px; color: #777; margin-top: 20px; margin-bottom: 0; }
#workspace-view { display: none; align-items: flex-start; gap: 30px; width: 100%; max-width: 1200px; }
.workspace-main { flex-grow: 1; text-align: center; }
#image-preview-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 20px; margin-bottom: 25px; }
.preview-card { position: relative; border-radius: 16px; overflow: hidden; aspect-ratio: 1 / 1; animation: zoomIn 0.5s ease-out; border: 2px solid transparent; transition: border-color 0.3s ease; cursor: grab; }
.preview-card:active { cursor: grabbing; }
@keyframes zoomIn { from { transform: scale(0.5); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.preview-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.preview-card:hover img { transform: scale(1.1); }
.preview-card .remove-btn { position: absolute; top: 8px; right: 8px; background-color: rgba(0,0,0,0.6); color: white; border: none; border-radius: 50%; width: 32px; height: 32px; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 24px; line-height: 32px; transition: all 0.3s; z-index: 10; }
.preview-card .remove-btn:hover { background-color: var(--accent-gold); color: #fff; transform: scale(1.1); }
html[data-theme="light"] .preview-card .remove-btn:hover { color: #fff; }
.sortable-ghost { opacity: 0.4; border: 2px dashed var(--accent-gold); }
.sortable-chosen { transform: scale(1.05); box-shadow: 0 8px 30px rgba(0,0,0,0.2); cursor: grabbing; }
.btn-add-more { width: 160px; height: 160px; background-color: transparent; border: 2px dashed var(--border-color); border-radius: 16px; color: #888; cursor: pointer; transition: all 0.3s; }
.btn-add-more:hover { border-color: var(--accent-gold); color: var(--accent-gold); }
.btn-add-more svg { width: 48px; height: 48px; }
.workspace-sidebar { width: 340px; flex-shrink: 0; padding: 30px; }
.workspace-sidebar h2 { font-family: var(--font-serif); font-size: 28px; color: var(--text-primary); text-align: left; margin-bottom: 30px; transition: color 0.4s ease; }
.option-group { margin-bottom: 25px; text-align: left; }
.option-group label { font-size: 15px; font-weight: 600; color: var(--text-secondary); margin-bottom: 12px; display: block; transition: color 0.4s ease; }
.option-buttons { display: flex; gap: 10px; }
.option-button { flex: 1; padding: 12px; border: 2px solid var(--border-color); border-radius: 10px; background: transparent; cursor: pointer; transition: all 0.2s; font-family: var(--font-sans); font-weight: 500; color: var(--text-secondary); }
.option-button.selected { border-color: var(--accent-gold); background-color: rgba(212, 175, 55, 0.1); color: var(--accent-gold); }
html[data-theme="light"] .option-button.selected { background-color: rgba(229, 62, 62, 0.1); }
.custom-select { width: 100%; padding: 14px; border: 2px solid var(--border-color); border-radius: 10px; font-family: var(--font-sans); font-size: 14px; cursor: pointer; background: transparent; color: var(--text-primary); transition: all 0.4s ease; -webkit-appearance: none; -moz-appearance: none; appearance: none; background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%239ca3af' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e"); background-position: right 0.7rem center; background-repeat: no-repeat; background-size: 1.2em 1.2em; padding-right: 2.5rem; }
html[data-theme="light"] .custom-select { background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%234a5568' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e"); }
.custom-select option { background: #333; color: var(--text-primary); }
html[data-theme="light"] .custom-select option { background: #fff; color: var(--text-dark); }
.btn-convert { width: 100%; padding: 18px; margin-top: 15px; }
.workspace-actions { width: 100%; padding: 10px; margin-bottom: 25px; background: var(--bg-glass); border: 1px solid var(--border-color); border-radius: 12px; display: flex; justify-content: center; align-items: center; gap: 15px; }
.preview-card .card-checkbox { position: absolute; top: 10px; left: 10px; width: 24px; height: 24px; cursor: pointer; }
.preview-card .download-single-btn { position: absolute; bottom: 10px; right: 10px; background: var(--accent-gold); color: #fff; border: none; border-radius: 8px; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; cursor: pointer; opacity: 0; transform: translateY(10px); transition: all 0.3s ease; }
.preview-card:hover .download-single-btn { opacity: 1; transform: translateY(0); }
.page-hero { width: 100%; padding: 120px 20px 60px 20px; text-align: center; background: var(--bg-glass); border-bottom: 1px solid var(--border-color); }
.page-hero h1 { font-family: var(--font-serif); font-size: 52px; color: var(--text-primary); animation: fadeIn 1s ease-out; }
.page-content { width: 100%; max-width: 800px; margin: 60px auto 100px auto; padding: 0 20px; text-align: left; animation: fadeIn 1.2s ease-out; }
.page-content h2 { font-family: var(--font-serif); font-size: 32px; color: var(--text-primary); margin-top: 50px; margin-bottom: 25px; }
.page-content p, .page-content li { font-size: 17px; line-height: 1.9; color: var(--text-secondary); margin-bottom: 20px; }
.page-content strong { color: var(--text-primary); font-weight: 600; }
.page-content ul, .page-content ol { padding-left: 25px; }
.page-content a { color: var(--accent-gold); text-decoration: none; font-weight: 600; transition: opacity 0.3s; }
.page-content a:hover { opacity: 0.8; }
.page-content hr { border: none; border-top: 1px solid var(--border-color); margin: 50px 0; }
.value-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 30px; margin-top: 30px;}
.value-item { padding: 30px; border-radius: 16px; background: var(--bg-glass); border: 1px solid var(--border-color);}
.value-item h3 { font-size: 20px; color: var(--text-primary); margin-bottom: 10px; }
.faq-item { border-bottom: 1px solid var(--border-color); margin-bottom: 15px; }
.faq-question { width: 100%; background: none; border: none; padding: 20px 5px; text-align: left; font-family: var(--font-sans); font-size: 19px; font-weight: 600; color: var(--text-primary); cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: color 0.3s; }
.faq-question:hover { color: var(--accent-gold); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease-out; }
.faq-answer p { padding: 0 10px 20px 10px; color: var(--text-secondary); line-height: 1.8; }
.faq-icon { font-size: 24px; font-weight: bold; transition: transform 0.4s ease; flex-shrink: 0; margin-left: 20px; }
.faq-question.active .faq-icon { transform: rotate(45deg); }
.contact-container { display: grid; grid-template-columns: 1fr 1.5fr; gap: 50px; width: 100%; max-width: 1100px; padding: 0; margin: 0; align-items: flex-start; }
.contact-info h2 { font-family: var(--font-serif); font-size: 36px; color: var(--text-primary); margin-bottom: 20px; }
.contact-info p { color: var(--text-secondary); line-height: 1.7; margin-bottom: 30px; }
.contact-details { list-style: none; padding: 0; }
.contact-details li { display: flex; align-items: center; gap: 15px; margin-bottom: 20px; color: var(--text-secondary); }
.contact-details li svg { width: 22px; height: 22px; color: var(--accent-gold); flex-shrink: 0; }
.social-links { display: flex; gap: 15px; margin-top: 30px; }
.social-links a { color: var(--text-secondary); transition: color 0.3s; }
.social-links a:hover { color: var(--accent-gold); }
.social-links svg { width: 24px; height: 24px; }
.contact-form .form-group { margin-bottom: 20px; }
.contact-form label { display: block; font-weight: 600; color: var(--text-primary); margin-bottom: 8px; }
.contact-form input, .contact-form textarea { width: 100%; padding: 14px; border: 1px solid var(--border-color); border-radius: 8px; background-color: rgba(255,255,255,0.05); color: var(--text-primary); font-family: var(--font-sans); font-size: 15px; }
html[data-theme="light"] .contact-form input, html[data-theme="light"] .contact-form textarea { background-color: #fff; }
.contact-form textarea { resize: vertical; min-height: 120px; }
.contact-form button { width: 100%; }
.tool-form-container { width: 100%; max-width: 700px; padding: 40px; }
.form-options { margin-top: 30px; border-top: 1px solid var(--border-color); padding-top: 30px; }
.form-group input[type="text"]:focus, .form-group select:focus { border-color: var(--accent-gold); box-shadow: 0 0 0 3px var(--accent-shadow-color); outline: none; }
.radio-group label { display: inline-flex; align-items: center; margin-right: 20px; cursor: pointer; }
#file-list-merge { list-style: none; padding: 0; }
#file-list-merge li { background: rgba(255, 255, 255, 0.05); padding: 15px 20px; border-radius: 12px; margin-bottom: 10px; border: 1px solid var(--border-color); display: flex; align-items: center; justify-content: space-between; font-weight: 500; cursor: grab; }
#file-list-merge li:active { cursor: grabbing; }
html[data-theme="light"] #file-list-merge li { background: #fff; }
.site-footer { width: 100%; background-color: var(--bg-primary); border-top: 1px solid var(--border-color); padding: 60px 0 40px 0; font-family: var(--font-sans); transition: background-color 0.4s ease, border-color 0.4s ease; flex-shrink: 0; }
html[data-theme="light"] .site-footer { background-color: #eef2f7; border-top: 1px solid #dde4ee; }
.footer-container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.footer-main { display: grid; grid-template-columns: 2fr 3fr; gap: 60px; margin-bottom: 40px; }
.footer-brand h3 { font-family: var(--font-serif); font-size: 24px; font-weight: 700; color: var(--text-primary); margin-bottom: 15px; }
.footer-brand p { font-size: 15px; line-height: 1.7; color: var(--text-secondary); }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.footer-column h4 { font-family: var(--font-sans); font-size: 15px; font-weight: 600; color: var(--text-primary); margin-bottom: 20px; text-transform: uppercase; letter-spacing: 1px; }
html[data-theme="light"] .footer-column h4 { color: var(--accent-gold); }
.footer-column ul { list-style: none; padding: 0; margin: 0; }
.footer-column ul li { margin-bottom: 12px; }
.footer-column ul li a { color: var(--text-secondary); text-decoration: none; font-size: 15px; transition: color 0.3s ease; }
.footer-column ul li a:hover { color: var(--accent-gold); }
.footer-bottom { text-align: center; padding-top: 40px; border-top: 1px solid var(--border-color); font-size: 14px; color: var(--text-secondary); }
.loading-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.7); backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px); display: none; align-items: center; justify-content: center; z-index: 9999; flex-direction: column; gap: 20px; }
.loading-spinner { width: 60px; height: 60px; border: 5px solid var(--border-color); border-top-color: var(--accent-gold); border-radius: 50%; animation: spin 1s linear infinite; }
.loading-overlay p { color: var(--text-primary); font-size: 18px; font-weight: 500; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (max-width: 992px) {
    .main-container { padding-top: 100px; }
    .site-header { position: fixed; background: var(--bg-glass); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); padding: 15px 0; }
    .view-container { align-items: flex-start; padding-top: 20px; }
    .mobile-nav-toggle { display: flex; flex-direction: column; justify-content: space-around; width: 30px; height: 25px; background: transparent; border: none; cursor: pointer; padding: 0; z-index: 1001; }
    .mobile-nav-toggle span { width: 30px; height: 3px; background-color: var(--text-primary); border-radius: 10px; transition: all 0.3s linear; position: relative; transform-origin: 1px; }
    .main-nav { display: none; }
    body.nav-open .main-nav { display: flex; flex-direction: column; position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: var(--bg-primary); padding: 100px 20px 20px 20px; text-align: center; gap: 15px; }
    body.nav-open .main-nav a { font-size: 20px; padding: 15px; }
    body.nav-open .mobile-nav-toggle { position: fixed; right: 25px; top: 25px; }
    body.nav-open .mobile-nav-toggle span:nth-child(1) { transform: rotate(45deg); }
    body.nav-open .mobile-nav-toggle span:nth-child(2) { opacity: 0; transform: translateX(20px); }
    body.nav-open .mobile-nav-toggle span:nth-child(3) { transform: rotate(-45deg); }
    #workspace-view { flex-direction: column; gap: 30px; }
    .workspace-sidebar { width: 100%; order: 2; }
    .workspace-main { width: 100%; order: 1; }
    #image-preview-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 15px; }
    .btn-add-more { width: 120px; height: 120px; }
    .hub-header { margin-top: 40px; }
    .hub-header h1, #landing-view h1, .page-hero h1 { font-size: 36px; }
    #landing-view .upload-box, #download-view .download-box, .workspace-sidebar, .tool-form-container { padding: 30px 25px; }
    #workspace-sidebar h2 { font-size: 24px; }
    .footer-main { grid-template-columns: 1fr; gap: 50px; }
    .contact-container { grid-template-columns: 1fr; gap: 50px; }
    .page-hero { padding-top: 100px; }
    .page-content { margin-top: 40px; margin-bottom: 80px; }
}
@media (max-width: 768px) {
    .site-branding { display: none; }
    .header-container { justify-content: flex-end; }
    .footer-links { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .main-nav a { padding: 8px 10px; font-size: 13px; }
    .hub-header h1, #landing-view h1, .page-hero h1 { font-size: 28px; }
    .hub-header p, #landing-view p, .page-content p, .page-content li { font-size: 16px; }
    .btn-primary { padding: 16px 30px; font-size: 15px; }
    #image-preview-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-links { grid-template-columns: 1fr; }
    .footer-main, .footer-bottom { text-align: center; }
}