/* Base Styles & Variables (Dark Mode Theme) */
:root {
    --color-bg-primary: #020617; /* Very Dark Blue */
    --color-bg-secondary: #0A1020; /* Slightly Lighter Dark Blue */
    --color-text-primary: #E2E8F0; /* Light Gray */
    --color-text-secondary: #94A3B8; /* Muted Gray */
    --color-accent: #00BCD4; /* Aqua (Used for solid accent) */
    --color-accent-gradient: linear-gradient(135deg, #00BCD4 0%, #20E3B2 100%); /* Teal/Aqua Gradient */
    --color-success: #10B981;
    --color-error: #EF4444;
    --border-radius: 12px;
    --transition-speed: 0.3s;
}

/* Global Reset and Typography */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
}

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

a {
    color: var(--color-accent);
    text-decoration: none;
}

/* Navigation Bar */
#navbar {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-bg-secondary);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    z-index: 1000;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.brand-logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
}

.brand-logo i {
    color: var(--color-accent);
    margin-right: 8px;
}

nav a {
    margin-left: 25px;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-speed);
}

nav a:hover {
    color: var(--color-accent);
}

.menu-toggle {
    display: none; /* Hide on desktop */
    background: none;
    border: none;
    color: var(--color-text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero-section {
    background: var(--color-bg-primary);
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: 40px;
}

/* CTA Button - Primary Style */
.cta-button {
    display: inline-flex;
    align-items: center;
    padding: 15px 30px;
    border: none;
    border-radius: 50px;
    background: var(--color-accent-gradient);
    color: var(--color-bg-primary);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.cta-button:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 10px 20px rgba(0, 188, 212, 0.3);
}

.cta-button i {
    margin-left: 10px;
}

/* Privacy Assurance Banner */
.privacy-banner {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 188, 212, 0.1);
    color: var(--color-accent);
    padding: 10px 20px;
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
    font-size: 0.9rem;
    font-weight: 500;
}

.privacy-banner i {
    margin-right: 8px;
}

/* General Section Styling */
.section-padding {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: var(--color-text-primary);
}

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

.tool-card {
    background-color: var(--color-bg-secondary);
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
    cursor: pointer;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    border: 1px solid transparent;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
    border-color: var(--color-accent);
}

.tool-icon {
    font-size: 2.5rem;
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 15px;
}

.tool-card h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
    color: var(--color-text-primary);
}

.tool-card p {
    color: var(--color-text-secondary);
}

/* Tool Workspace */
#tool-workspace {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-bg-secondary);
    z-index: 1001;
    padding-top: 70px; /* Space for fixed navbar */
    display: flex;
    flex-direction: column;
}

.workspace-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    background-color: #0A1020; /* Slightly darker header */
    border-bottom: 1px solid #1e293b;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1002;
}

#workspace-title {
    font-size: 1.6rem;
    font-weight: 600;
}

.close-button {
    background: none;
    color: var(--color-text-secondary);
    font-size: 1.2rem;
    border: none;
    cursor: pointer;
    padding: 10px;
    border-radius: 50%;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.close-button:hover {
    background-color: #1e293b;
    color: var(--color-text-primary);
}

/* Upload Area */
.upload-area {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    flex-grow: 1;
    padding: 50px;
    border: 3px dashed var(--color-text-secondary);
    margin: 50px 30px;
    border-radius: var(--border-radius);
    transition: border-color 0.2s;
}

.upload-area.dragover {
    border-color: var(--color-accent);
}

.upload-icon {
    font-size: 4rem;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.upload-area p {
    font-size: 1.2rem;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.upload-note {
    font-size: 0.85rem;
    margin-top: 15px;
    color: #64748B !important;
}

/* Editor Area */
.editor-area {
    display: flex;
    flex-grow: 1;
    overflow: hidden;
    padding-top: 60px; /* Adjust for fixed workspace header */
}

.editor-sidebar {
    width: 300px;
    background-color: #0A1020;
    padding: 30px;
    border-right: 1px solid #1e293b;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
    flex-shrink: 0;
}

.editor-content {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
}

.file-count-label {
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 15px;
    padding: 5px 10px;
    background-color: rgba(0, 188, 212, 0.1);
    border-radius: 5px;
    display: inline-block;
}

/* Tool Controls Styling */
.control-group {
    margin-bottom: 20px;
    padding: 15px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
}

.editor-sidebar label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.editor-sidebar input[type="text"],
.editor-sidebar select,
.editor-sidebar input[type="range"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    background-color: #1e293b;
    border: 1px solid #334155;
    color: var(--color-text-primary);
    border-radius: 6px;
}

.editor-sidebar input[type="range"] {
    padding: 0;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.control-tip {
    font-size: 0.85rem;
    color: var(--color-accent);
    margin-top: -10px;
}

.action-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 15px;
    border: 1px solid var(--color-text-secondary);
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
    border-radius: 8px;
    cursor: pointer;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.action-button i {
    margin-right: 8px;
}

.action-button:hover:not(:disabled) {
    background-color: #1e293b;
    border-color: var(--color-accent);
}

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

.full-width {
    width: 100%;
}

/* Thumbnails Container (Grid/Flex for Reordering) */
.thumbnails-container {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    padding: 10px;
}

.thumbnail-item {
    background-color: #1e293b;
    padding: 10px;
    border-radius: 8px;
    width: 150px; /* Fixed size for uniform look */
    min-height: 200px;
    text-align: center;
    position: relative;
    cursor: grab;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 2px solid transparent;
}

.thumbnail-item:hover {
    box-shadow: 0 0 15px rgba(0, 188, 212, 0.5);
}

.thumbnail-item.dragging {
    opacity: 0.7;
    cursor: grabbing;
}

.thumbnail-item.selected {
    border-color: var(--color-accent);
    box-shadow: 0 0 15px rgba(0, 188, 212, 0.8);
}

.thumbnail-canvas {
    width: 100%;
    height: auto;
    border-radius: 4px;
    border: 1px solid #334155;
    margin-bottom: 8px;
}

.page-number {
    font-weight: 600;
    color: var(--color-text-primary);
}

.file-name {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-top: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Download Area */
.download-area {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    flex-grow: 1;
    text-align: center;
    padding: 50px;
}

.success-icon {
    font-size: 5rem;
    color: var(--color-success);
    margin-bottom: 20px;
    animation: bounceIn 0.8s ease-out;
}

.large-button {
    font-size: 1.25rem;
    padding: 18px 40px;
    margin-bottom: 20px;
}

#new-task-btn {
    padding: 12px 25px;
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* Privacy Section */
.privacy-box {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--color-bg-secondary);
    padding: 40px;
    border-radius: var(--border-radius);
    border: 1px solid #1e293b;
}

.privacy-statement {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 15px;
}

.privacy-box p {
    margin-bottom: 15px;
    color: var(--color-text-secondary);
}

.privacy-box i {
    color: var(--color-accent);
    margin-right: 5px;
}

/* Contact Section */
.contact-box {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-email {
    font-size: 1.1rem;
    margin: 20px 0;
}

.contact-email a {
    font-weight: 600;
}

.social-icons a {
    font-size: 1.8rem;
    margin: 0 15px;
    color: var(--color-text-secondary);
    transition: color var(--transition-speed);
}

.social-icons a:hover {
    color: var(--color-accent);
}

/* Legal Footer */
.legal-section {
    padding-top: 40px;
    border-top: 1px solid #1e293b;
    background-color: var(--color-bg-secondary);
}

.legal-content {
    display: flex;
    justify-content: space-between;
    gap: 40px;
}

.legal-item {
    flex: 1;
}

.legal-item h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--color-text-primary);
}

.legal-item p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* Main Footer */
footer {
    padding: 20px 0;
    text-align: center;
    font-size: 0.9rem;
    background-color: #00040E; /* Even darker footer */
    color: var(--color-text-secondary);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Tooltip Styles (Simple and Clean) */
[title]:hover::after {
    content: attr(title);
    position: absolute;
    bottom: calc(100% + 5px);
    left: 50%;
    transform: translateX(-50%);
    background-color: #334155;
    color: #fff;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    white-space: nowrap;
    z-index: 10;
}

/* Animation */
@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

/* --- Media Queries for Mobile Responsiveness --- */
@media (max-width: 768px) {
    .nav-content {
        padding: 10px 20px;
    }

    nav {
        display: none; /* Hidden by default on mobile */
        flex-direction: column;
        position: absolute;
        top: 60px; /* Below navbar */
        left: 0;
        width: 100%;
        background-color: var(--color-bg-secondary);
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
    }

    nav.active {
        display: flex;
    }

    nav a {
        margin: 0;
        padding: 15px 20px;
        border-bottom: 1px solid #1e293b;
        text-align: center;
    }
    
    .menu-toggle {
        display: block; /* Show menu toggle button */
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-section {
        padding: 80px 0 120px;
    }

    .tools-grid {
        grid-template-columns: 1fr;
    }

    .editor-area {
        flex-direction: column;
        overflow-y: auto;
    }

    .editor-sidebar {
        width: 100%;
        max-height: 400px; /* Constrain sidebar height on mobile */
        border-right: none;
        border-bottom: 1px solid #1e293b;
        padding: 20px;
    }

    .editor-content {
        padding: 20px 10px;
    }

    .thumbnails-container {
        justify-content: center;
    }

    .legal-content {
        flex-direction: column;
    }
}

/* Additional Tooltip adjustments for touch devices if necessary */
@media (hover: none) and (pointer: coarse) {
    [title]:hover::after {
        content: none !important; /* Disable hover tooltips on touch devices */
    }
}