/* GeraiKonversi - Minimalist Professional Dark Theme */

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

:root {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #242424;
    --bg-card: #1e1e1e;
    --bg-hover: #252525;
    --text-primary: #f5f5f5;
    --text-secondary: #a0a0a0;
    --text-muted: #6b6b6b;
    --primary: #3b82f6;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --border-color: #2a2a2a;
    --border-light: #333333;
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-secondary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3 { color: var(--text-primary); font-weight: 600; }
h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

nav {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: color var(--transition);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition);
}

.nav-menu a:hover, .nav-menu a.active { color: var(--text-primary); }
.nav-menu a:hover::after, .nav-menu a.active::after { width: 100%; }

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

header {
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
    border-top: 2px solid var(--primary);
    text-align: center;
    padding: 4rem 2rem;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.tagline {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
    flex: 1;
}

.security-note {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--success);
    border-radius: var(--radius-md);
    padding: 2rem;
    margin-bottom: 3rem;
}

.security-note h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.security-note p {
    color: var(--text-secondary);
    margin: 0.5rem 0;
    padding-left: 0.5rem;
}

.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.stat-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    text-align: center;
    transition: all var(--transition);
}

.stat-item:hover {
    transform: translateY(-4px);
    border-top-color: var(--primary);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.category-section {
    margin: 3rem 0;
}

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

.category-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.category-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    text-decoration: none;
    display: block;
    transition: all var(--transition);
}

.category-card:hover {
    transform: translateY(-4px);
    border-top-color: var(--primary);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.category-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.category-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.tool-count {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 0.3rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
}
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2.5rem 1.5rem;
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 220px;
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary);
    transform: scaleX(0);
    transition: transform var(--transition);
}

.tool-card:hover::before {
    transform: scaleX(1);
}

.tool-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: 0 12px 30px rgba(59, 130, 246, 0.15);
}

.tool-icon {
    font-size: 3.5rem;
    margin-bottom: 1.2rem;
    display: block;
    filter: grayscale(0.3);
    transition: all var(--transition);
}

.tool-card:hover .tool-icon {
    filter: grayscale(0);
    transform: scale(1.15);
}

.tool-card h2 {
    color: var(--text-primary);
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
    line-height: 1.3;
}

.tool-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin: 0;
}

.features-section {
    margin: 4rem 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    text-align: center;
    transition: all var(--transition);
}

.feature-item:hover {
    transform: translateY(-4px);
    border-top-color: #06b6d4;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.feature-item h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.feature-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    margin-top: 1rem;
    transition: all var(--transition);
}

.btn:hover:not(:disabled) {
    filter: brightness(1.15);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--primary);
    color: white;
}

input[type="file"] {
    display: none;
}

input[type="text"],
input[type="number"],
input[type="password"],
.range-input,
.password-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    margin: 0.5rem 0;
    transition: all var(--transition);
}

input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

input::placeholder {
    color: var(--text-muted);
}

input[type="range"] {
    width: 100%;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.slider-container {
    margin: 1.5rem 0;
}

.slider-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 600;
}

.upload-area {
    background: var(--bg-card);
    border: 2px dashed var(--border-light);
    border-radius: var(--radius-md);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    margin: 1rem 0;
    transition: all var(--transition);
}

.upload-area:hover {
    border-color: var(--primary);
    background: var(--bg-hover);
}

.upload-area p {
    color: var(--text-secondary);
}
.file-list {
    margin: 1rem 0;
    max-height: 200px;
    overflow-y: auto;
}

.file-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1rem;
    margin: 0.5rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.file-item span {
    color: var(--text-primary);
    font-weight: 500;
}

.file-item button {
    background: var(--danger);
    color: white;
    border: none;
    padding: 0.4rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.9rem;
    transition: filter var(--transition);
}

.file-item button:hover {
    filter: brightness(1.1);
}

.progress-bar {
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    height: 40px;
    margin: 1rem 0;
    overflow: hidden;
    display: none;
}

.progress-fill {
    background: linear-gradient(90deg, var(--primary), #06b6d4);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    width: 0;
    transition: width var(--transition);
}

.info-box {
    background: var(--bg-tertiary);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    margin: 1rem 0;
}

.info-box p,
.info-box ul {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.info-box ul {
    margin-left: 1.5rem;
    margin-top: 0.5rem;
}

.info-box li {
    margin: 0.3rem 0;
}

.info-box h3 {
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.format-selector {
    display: flex;
    gap: 1rem;
    margin: 1rem 0;
    flex-wrap: wrap;
}

.format-btn {
    flex: 1;
    min-width: 100px;
    padding: 0.85rem 1.5rem;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    font-size: 0.95rem;
}

.format-btn:hover:not(:disabled) {
    border-color: var(--primary);
    color: var(--text-primary);
    transform: translateY(-2px);
}

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

.format-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(4px);
    overflow-y: auto;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin: 3% auto;
    padding: 2.5rem;
    max-width: 600px;
    position: relative;
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-content h2 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

.close-btn {
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
    line-height: 1;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-btn:hover {
    color: var(--text-primary);
    transform: rotate(90deg);
}

.disclaimer-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--warning);
    border-radius: var(--radius-md);
    padding: 2rem;
    margin: 3rem 0;
}

.disclaimer-section h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.disclaimer-section ul {
    list-style-position: inside;
    color: var(--text-secondary);
    line-height: 1.8;
}

.disclaimer-section li {
    margin: 0.5rem 0;
    padding-left: 0.5rem;
}

footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    text-align: center;
    padding: 2rem;
    margin-top: auto;
    color: var(--text-secondary);
}

footer p {
    margin: 0.3rem 0;
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 1rem;
        border-top: 1px solid var(--border-color);
        gap: 0;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu a {
        display: block;
        padding: 1rem;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1.1rem;
    }
    
    .container {
        padding: 2rem 1rem;
    }
    
    .category-cards,
    .tools-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-section {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .modal-content {
        margin: 10% 1rem;
        padding: 1.5rem;
    }
    
    .format-selector {
        flex-direction: column;
    }
    
    .format-btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    header {
        padding: 3rem 1rem;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    .stats-section {
        grid-template-columns: 1fr;
    }
    
    .tool-card {
        min-height: 180px;
        padding: 2rem 1rem;
    }
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}