:root {
    --primary: #FF5A5F; /* Vibrant Red/Pink */
    --primary-soft: #FFC0CB;
    --secondary: #00A699;
    --bg-body: #F4F4F0;
    --text-dark: #000000;
    --text-light: #333333;
    --card-bg: #FFFFFF;
    
    --border-color: #000000;
    --border-w: 3px;
    --shadow-offset: 6px;
    --brutal-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--border-color);
    --brutal-shadow-hover: 2px 2px 0px var(--border-color);
    
    --border-radius: 0px; 
    --font-main: 'Outfit', sans-serif;
    --transition: all 0.15s ease-out;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    outline: none;
}

html {
    font-size: 13px;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-body);
    color: var(--text-dark);
    min-height: 100vh;
    padding: 20px;
}

/* App Layout */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 30px;
}

/* Sidebar */
.sidebar {
    background: #FFCD29; /* Vibrant yellow */
    border: var(--border-w) solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--brutal-shadow);
    position: sticky;
    top: 20px;
    height: fit-content;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--text-dark);
    text-transform: uppercase;
    cursor: pointer; /* Added for menu trigger */
}

.nav-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.nav-item {
    padding: 15px 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition);
    font-weight: 800;
    color: var(--text-dark);
    background: var(--card-bg);
    border: var(--border-w) solid var(--border-color);
    box-shadow: 3px 3px 0px var(--border-color);
}

.nav-item:hover {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0px var(--border-color);
}

.nav-item.active {
    background: #90A8ED; /* Blue for active */
    transform: translate(2px, 2px);
    box-shadow: 1px 1px 0px var(--border-color);
}

/* Main Content Area */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.header-card {
    background: #90A8ED; 
    border: var(--border-w) solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 30px 40px;
    box-shadow: var(--brutal-shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-title h1 {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 5px;
    text-transform: uppercase;
    font-weight: 900;
}

.header-title p {
    color: var(--text-dark);
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: 5px;
}

/* Cards */
.tool-section {
    background: var(--card-bg);
    border: var(--border-w) solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--brutal-shadow);
    display: none;
}

.tool-section.active {
    display: block;
}

/* Upload Zone */
.upload-zone {
    border: var(--border-w) solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 50px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: #FFF;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    box-shadow: 4px 4px 0px var(--border-color);
}

.upload-zone:hover {
    background: #FFE5E5;
    transform: translate(-2px, -2px);
    box-shadow: var(--brutal-shadow);
    border-style: solid;
}

.upload-zone i {
    font-size: 3.5rem;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.upload-zone h3 {
    font-weight: 900;
    text-transform: uppercase;
}

/* Controls & Buttons */
.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

label {
    font-weight: 800;
    color: var(--text-dark);
    font-size: 1rem;
    text-transform: uppercase;
}

.btn {
    padding: 14px 28px;
    border: var(--border-w) solid var(--border-color);
    font-weight: 800;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: inherit;
    text-transform: uppercase;
    font-size: 1.1rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: var(--brutal-shadow);
    text-shadow: 1.5px 1.5px 0px #000;
}

.btn-primary:hover:not(:disabled) {
    transform: translate(-2px, -2px);
    box-shadow: 8px 8px 0px var(--border-color);
}

.btn-primary:active:not(:disabled) {
    transform: translate(4px, 4px);
    box-shadow: 2px 2px 0px var(--border-color);
}
.btn-primary:disabled {
    background: #D1D5DB;
    box-shadow: none;
    transform: none;
    cursor: not-allowed;
    color: #6B7280;
    text-shadow: none;
    border-color: #9CA3AF;
}

/* Form Inputs */
input[type="number"], input[type="text"] {
    background: #FFF;
    border: var(--border-w) solid var(--border-color);
    padding: 15px 20px;
    box-shadow: 4px 4px 0px var(--border-color);
    font-family: inherit;
    color: var(--text-dark);
    font-weight: 700;
    font-size: 1rem;
}

input[type="number"]:focus, input[type="text"]:focus {
    box-shadow: 6px 6px 0px var(--primary);
    transform: translate(-2px, -2px);
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 15px;
    background: #FFF;
    border: 2px solid var(--border-color);
    outline: none;
    box-shadow: 2px 2px 0px var(--border-color);
    border-radius: 0;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 25px;
    height: 25px;
    background: var(--primary);
    border: 2px solid var(--border-color);
    cursor: pointer;
    box-shadow: 2px 2px 0px var(--border-color);
}

/* Preview Area */
.preview-container {
    margin-top: 30px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.preview-box {
    background: #E8F0FE;
    border: var(--border-w) solid var(--border-color);
    padding: 20px;
    text-align: center;
    box-shadow: var(--brutal-shadow);
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.preview-placeholder {
    color: var(--text-dark);
    font-size: 1.1rem;
    font-weight: 800;
    padding: 40px 20px;
    border: var(--border-w) solid var(--border-color);
    margin-bottom: 10px;
    background: #FFF;
}

.preview-box img {
    max-width: 100%;
    border: var(--border-w) solid var(--border-color);
    max-height: 350px;
    object-fit: contain;
    background: #FFF;
}

.preview-box h4 {
    margin-bottom: 15px;
    color: var(--text-dark);
    font-weight: 900;
    text-transform: uppercase;
    font-size: 1.2rem;
    border-bottom: 3px solid var(--border-color);
    padding-bottom: 10px;
    display: inline-block;
}

/* Responsive Overrides */
@media (max-width: 1024px) {
    .app-container {
        grid-template-columns: 1fr;
        padding-top: 80px;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: 70px;
        z-index: 1000;
        padding: 0 20px;
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        border-radius: 0;
        width: 100%;
        border-top: none;
        border-left: none;
        border-right: none;
    }

    .nav-menu {
        display: none;
        flex-direction: column;
        gap: 15px;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #FFCD29;
        padding: 20px;
        border-bottom: var(--border-w) solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        z-index: 999;
    }

    .nav-menu.show {
        display: flex;
    }

    .nav-item {
        padding: 15px 20px;
        width: 100%;
    }

    .nav-item span {
        display: block;
    }

    .nav-item i {
        margin: 0;
    }

    .header-card {
        padding: 20px;
    }

    .header-title h1 {
        font-size: 1.5rem;
    }
}

/* File Lists & Grids */
.file-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 15px;
    padding: 10px;
}

.file-item-card {
    background: white;
    border: var(--border-w) solid var(--border-color);
    padding: 10px;
    box-shadow: 4px 4px 0px var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    position: relative;
    transition: var(--transition);
}

.file-item-card:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--border-color);
}

.file-item-card img {
    width: 100%;
    height: 100px;
    object-fit: cover;
    border: 2px solid var(--border-color);
}

.file-item-card span {
    font-size: 0.9rem;
    font-weight: 800;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.remove-btn {
    position: absolute;
    top: -10px;
    right: -10px;
    background: #ef4444;
    color: white;
    border: 3px solid var(--border-color);
    border-radius: 0;
    width: 30px;
    height: 30px;
    font-size: 1rem;
    font-weight: 900;
    cursor: pointer;
    box-shadow: 2px 2px 0px var(--border-color);
}
.remove-btn:hover {
    transform: translate(2px, 2px);
    box-shadow: 0px 0px 0px var(--border-color);
}

/* Document Previews */
.document-preview {
    background: white;
    padding: 30px;
    border: var(--border-w) solid var(--border-color);
    max-height: 400px;
    overflow-y: auto;
    text-align: left;
    font-size: 1rem;
    box-shadow: inset 4px 4px 0px rgba(0,0,0,0.1);
}

.file-info-card {
    background: #00E676;
    padding: 15px 25px;
    border: var(--border-w) solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-dark);
    font-weight: 900;
    box-shadow: 4px 4px 0px var(--border-color);
}

/* PDF Stats */
.pdf-stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.stat-item {
    background: #FFF;
    padding: 15px;
    border: var(--border-w) solid var(--border-color);
    box-shadow: 4px 4px 0px var(--border-color);
}

.stat-label {
    display: block;
    font-size: 1rem;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--primary);
    text-shadow: 1px 1px 0px #000;
}

.page-thumbnails-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 10px;
}

.page-thumb {
    aspect-ratio: 1 / 1.4;
    background: #FFCD29;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 900;
    font-size: 1.2rem;
    color: var(--text-dark);
    box-shadow: 2px 2px 0px var(--border-color);
    border: 2px solid var(--border-color);
}

@media (max-width: 768px) {
    body { padding: 10px; background-size: 20px 20px; }
    .tool-section { padding: 25px; }
    .preview-container { grid-template-columns: 1fr; }
    .upload-zone { padding: 30px; }
}

.loader-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.9);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    border: 10px solid var(--text-dark);
}

.loader {
    width: 60px;
    height: 60px;
    background: var(--primary);
    border: var(--border-w) solid var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: var(--brutal-shadow);
    animation: spinBrutal 1s infinite steps(4);
}

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

#loaderText {
    font-weight: 900;
    font-size: 1.5rem;
    margin-top: 20px;
    text-transform: uppercase;
    -webkit-text-stroke: 1px #000;
    color: #FFF;
    text-shadow: 2px 2px 0px #000;
    position: absolute;
    bottom: 30%;
}

.notification {
    position: fixed;
    top: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(-150px);
    background: #FFCD29;
    padding: 15px 30px;
    border: var(--border-w) solid var(--border-color);
    box-shadow: var(--brutal-shadow);
    font-weight: 900;
    transition: var(--transition);
    z-index: 3000;
    color: var(--text-dark);
    text-transform: uppercase;
    font-size: 1.2rem;
}

.notification.show {
    transform: translateX(-50%) translateY(0);
}

/* PDF Merge List Styling */
.pdf-item {
    padding: 15px;
    width: 100%;
}

.pdf-icon-placeholder {
    width: 50px;
    height: 50px;
    background: #00E676;
    border: 3px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dark);
    margin-bottom: 5px;
    box-shadow: 2px 2px 0px var(--border-color);
}

.pdf-icon-placeholder i {
    width: 24px;
    height: 24px;
}

.pdf-info {
    text-align: center;
    width: 100%;
}

.pdf-info .file-name {
    display: block;
    font-size: 1rem;
    font-weight: 900;
    color: var(--text-dark);
    margin-bottom: 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.pdf-info .file-size {
    display: block;
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 700;
}

.pdf-list, .super-list {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
}

.super-item {
    padding: 15px;
    border: var(--border-w) solid var(--border-color);
    background: #FFF;
    box-shadow: 4px 4px 0px var(--border-color);
    margin: 5px;
    transition: var(--transition);
}

.super-item:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--border-color);
    background: #FFCD29;
}

/* Override inline iframe styles */
iframe {
    border: var(--border-w) solid var(--border-color) !important;
    border-radius: 0 !important;
    box-shadow: 6px 6px 0px var(--border-color) !important;
    background: #FFF !important;
}

/* Beranda Grid */
.beranda-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.beranda-card {
    background: #FFF;
    border: var(--border-w) solid var(--border-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: 4px 4px 0px var(--border-color);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 15px;
}

.beranda-card:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0px var(--border-color);
    background: #E8F0FE;
}

.beranda-card i {
    font-size: 3rem;
    color: var(--primary);
}

.beranda-card h3 {
    font-size: 1.5rem;
    font-weight: 900;
    text-transform: uppercase;
}

.beranda-card p {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-light);
}