/* --- MODERN UI STYLES (ENHANCED) --- */
:root {
    --primary-color: #1abc9c; /* Teal */
    --primary-darker: #16a085;
    --secondary-color: #7f8c8d; /* Gray */
    --secondary-darker: #606f70;
    --accent-color: #e67e22; /* Orange */
    --light-bg: #f4f7f6; /* Very light grey-green */
    --content-bg: #ffffff;
    --dark-text: #2c3e50; /* Dark blue/gray */
    --light-text: #ffffff;
    --light-text-rgb: 255,255,255; /* Added for scrollbar track */
    --gray-text: #95a5a6; /* Lighter gray */
    --border-color: #ecf0f1; /* Light border */
    --success-color: #2ecc71; /* Green */
    --danger-color: #e74c3c; /* Red */
    --info-color: #3498db; /* Blue */

    /* RGB versions for rgba() usage */
    --dark-text-rgb: 44, 62, 80;
    --primary-rgb: 26, 188, 156;
    --info-rgb: 52, 152, 219;


    --header-bg-color: rgba(var(--dark-text-rgb), 0.85); /* For glassmorphism */
    --header-link-color: var(--primary-color);
    --header-link-hover: var(--light-text);

    --border-radius-sm: 0.3rem;
    --border-radius-md: 0.6rem;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 5px 15px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);

    --card-hover-glow: 0 0 25px rgba(var(--primary-rgb), 0.3);
    --input-focus-glow: 0 0 0 3px rgba(var(--primary-rgb), 0.25);
    --subtle-glow-primary: 0 2px 10px -2px rgba(var(--primary-rgb),0.4), 0 1px 5px -3px rgba(var(--primary-rgb),0.3);

    --font-base-size: 16px;
    --line-height-base: 1.7;
    --padding-base: 1.5rem;
    --margin-base: 1.5rem;
}

/* --- Base & Reset --- */
*, *::before, *::after { box-sizing: border-box; }
html { font-size: var(--font-base-size); scroll-behavior: smooth; }

@keyframes subtleBackgroundAnimation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}
body {
    font-family: 'Roboto', sans-serif;
    line-height: var(--line-height-base);
    margin: 0; padding: 0;
    background: linear-gradient(-45deg, var(--light-bg), #e8f3f0, #f0f5f3, #ddeeed);
    background-size: 400% 400%;
    animation: subtleBackgroundAnimation 35s ease infinite;
    color: var(--dark-text);
    padding-top: 70px; /* Adjust based on final header height */
    font-weight: 400;
}

/* Custom Scrollbar (WebKit browsers) */
::-webkit-scrollbar { width: 10px; height: 10px;}
::-webkit-scrollbar-track { background: rgba(var(--dark-text-rgb), 0.05); }
::-webkit-scrollbar-thumb { background: var(--secondary-color); border-radius: var(--border-radius-sm); }
::-webkit-scrollbar-thumb:hover { background: var(--secondary-darker); }


/* --- Header --- */
header {
    background-color: var(--header-bg-color);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--light-text);
    padding: 0.8rem 0;
    position: fixed; width: 100%; top: 0; left: 0; z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: background-color 0.3s ease;
}
header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px; margin: 0 auto; padding: 0 var(--padding-base);
    box-shadow: none;
}
header h1 {
    margin: 0; font-size: 1.8rem; color: var(--header-link-color); font-weight: 700;
    letter-spacing: -0.5px;
    transition: color 0.3s ease, transform 0.2s ease;
}
header h1 a { color: inherit; text-decoration: none; }
header h1 a:hover { color: var(--header-link-hover); transform: scale(1.03); }
header nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 1.5rem; align-items: center; }
header nav a { /* This applies to main nav links and dropdown trigger text */
    color: var(--header-link-color);
    text-decoration: none; font-weight: 500;
    transition: color 0.3s ease, transform 0.2s ease;
    padding: 0.3rem 0; /* Vertical padding for main nav links */
    position: relative;
}
header nav > ul > li > a:not(.dropbtn)::after { /* Underline for direct li>a that are not dropdown triggers */
    content: ''; position: absolute; bottom: 0; left: 0;
    width: 0; height: 2px;
    background-color: var(--header-link-hover);
    transition: width 0.3s ease;
}
header nav > ul > li > a:not(.dropbtn):hover::after,
header nav > ul > li > a:not(.dropbtn).active-link::after { width: 100%; }

header nav > ul > li > a.active-link { /* Active state for direct li>a */
    color: var(--header-link-hover);
    font-weight: 700;
}
header nav ul li.dropdown .dropbtn.active-parent-dropdown { /* Style for active dropdown parent */
     color: var(--header-link-hover);
     font-weight: 700;
}


/* --- Header Dropdown Menu --- */
header nav ul li.dropdown {
    position: relative;
    display: inline-block;
}

header nav ul li.dropdown .dropbtn {
    display: flex;
    align-items: center;
    padding: 0.3rem 0.5rem;
}
header nav ul li.dropdown .dropbtn .arrow {
    font-size: 0.7em;
    margin-left: 5px;
    transition: transform 0.3s ease;
    display: inline-block;
}
header nav ul li.dropdown:hover .dropbtn .arrow {
    transform: rotate(180deg);
}

header nav ul li .dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--header-bg-color);
    min-width: 240px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.3);
    z-index: 1001;
    border-radius: 0 0 var(--border-radius-sm) var(--border-radius-sm);
    padding: 0.5rem 0;
    max-height: 70vh;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.2s ease-in-out, visibility 0.2s ease-in-out, transform 0.2s ease-in-out;
}

/* Custom scrollbar for dropdown content */
header nav ul li .dropdown-content::-webkit-scrollbar {
    width: 6px;
}
header nav ul li .dropdown-content::-webkit-scrollbar-track {
    background: rgba(var(--light-text-rgb, 255,255,255), 0.1);
}
header nav ul li .dropdown-content::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 3px;
}
/* For Firefox */
header nav ul li .dropdown-content {
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) rgba(var(--light-text-rgb, 255,255,255), 0.1);
}

header nav ul li .dropdown-content a {
    color: var(--header-link-color);
    padding: 10px 15px;
    text-decoration: none;
    display: block;
    text-align: left;
    font-weight: 400;
    white-space: nowrap;
    transition: background-color 0.2s ease, color 0.2s ease;
}
header nav ul li .dropdown-content a:hover {
    background-color: rgba(var(--primary-rgb), 0.2);
    color: var(--header-link-hover);
}
header nav ul li .dropdown-content a::after {
    display: none;
}
header nav ul li .dropdown-content a.active-link { /* Style for active link inside dropdown */
    background-color: rgba(var(--primary-rgb), 0.3);
    color: var(--header-link-hover);
    font-weight: 500;
}


/* Show dropdown on hover for parent li, or focus on button, or hover on content */
header nav ul li.dropdown:hover > .dropdown-content,
header nav ul li.dropdown .dropbtn:focus + .dropdown-content,
header nav ul li.dropdown .dropdown-content:hover
{
    display: block;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}


/* --- General Layout & Typography --- */
.container {
    max-width: 1140px;
    margin: var(--margin-base) auto;
    padding: calc(var(--padding-base) * 1.5);
    background-color: var(--content-bg);
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius-md);
}
h1, h2, h3, h4 { color: var(--dark-text); margin-bottom: var(--margin-base); text-align: center; font-weight: 500; }
h1 { font-size: 2.5rem; font-weight: 700;}
h2 { font-size: 2rem; margin-top: calc(var(--margin-base) * 1.5); }
h3 { font-size: 1.5rem; }
p { color: var(--dark-text); margin-bottom: var(--margin-base); font-weight: 300; }
a { color: var(--primary-color); text-decoration: none; transition: color 0.3s ease; }
a:hover { color: var(--primary-darker); text-decoration: underline; }

/* main > section { display: none; } */ /* THIS LINE IS NOW COMMENTED OUT */

/* --- Buttons --- */
.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--light-text);
    padding: 0.8rem 1.8rem;
    border-radius: var(--border-radius-md);
    text-align: center; border: none; cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease, color 0.3s ease;
    font-size: 1rem; line-height: 1.5; font-weight: 500;
    vertical-align: middle; text-decoration: none;
    box-shadow: var(--subtle-glow-primary);
}
.btn:hover {
    background-color: var(--primary-darker);
    color: var(--light-text); transform: translateY(-3px) scale(1.03);
    box-shadow: var(--shadow-md), 0 0 15px rgba(var(--primary-rgb), 0.25);
}
.btn:active {
    transform: translateY(-1px) scale(0.99);
    box-shadow: var(--shadow-sm);
}
.btn-secondary { background-color: var(--secondary-color); box-shadow: 0 2px 10px -2px rgba(127,140,141,0.4); }
.btn-secondary:hover { background-color: var(--secondary-darker); box-shadow: var(--shadow-md), 0 0 15px rgba(127,140,141, 0.25); }
.btn-success { background-color: var(--success-color); box-shadow: 0 2px 10px -2px rgba(46,204,113,0.4); }
.btn-success:hover { background-color: #27ae60;  box-shadow: var(--shadow-md), 0 0 15px rgba(46,204,113, 0.25); }
.btn:disabled {
    background-color: #bdc3c7;
    color: #7f8c8d; cursor: not-allowed; transform: none; box-shadow: none;
}

/* --- Forms & Inputs --- */
.tool-controls {
    margin-bottom: calc(var(--margin-base) * 1.5);
    display: flex; flex-wrap: wrap; gap: 1.5rem;
    align-items: center; justify-content: center;
    padding: var(--padding-base);
    background-color: var(--light-bg);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
}
.tool-controls label { font-weight: 500; margin-right: 0.5rem; color: var(--dark-text); }

input[type="text"], input[type="password"], input[type="number"], input[type="email"], select, textarea {
    padding: 0.8rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 1rem; font-family: inherit;
    background-color: var(--content-bg);
    color: var(--dark-text);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    vertical-align: middle;
}
input[type="text"]:focus, input[type="password"]:focus, input[type="number"]:focus, input[type="email"]:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--input-focus-glow);
}
textarea { width: 100%; min-height: 100px; resize: vertical; }
input[type="range"] {
    width: 100%; max-width: 300px; cursor: pointer; vertical-align: middle;
    accent-color: var(--primary-color);
}
select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 1rem center; background-size: 1em; padding-right: 3rem; cursor: pointer; }

/* --- Drop Zone --- */
.file-input-container { margin-bottom: var(--margin-base); text-align: center; }
.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 2.5rem;
    text-align: center; cursor: pointer;
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    color: var(--gray-text);
    max-width: 550px; margin: 1.5rem auto;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    min-height: 180px;
    background-color: var(--content-bg);
    position: relative; /* For pseudo-element icon */
    overflow: hidden;
}
.drop-zone::before { /* Upload icon */
    content: '📤'; /* Placeholder, ideally an SVG for better quality */
    font-size: 3rem;
    color: var(--primary-color);
    opacity: 0.2;
    display: block;
    margin-bottom: 0.5rem;
    transition: opacity 0.3s ease, transform 0.3s ease;
}
.drop-zone:hover::before { opacity: 0.5; transform: translateY(-3px) scale(1.05); }
.drop-zone p { margin: 0.5rem 0; font-weight: 300; z-index: 1; position:relative; }
.drop-zone label {
     margin-top: 1rem; color: var(--primary-color); cursor: pointer; font-weight: 500; display: inline-block; padding: 0.5rem 1rem; border: 1px solid transparent; border-radius: var(--border-radius-sm); transition: background-color 0.2s ease, color 0.2s ease; z-index: 1; position:relative;
}
.drop-zone label:hover { background-color: rgba(var(--primary-rgb), 0.1); color: var(--primary-darker); }
.drop-zone.drag-over {
    background-color: rgba(var(--primary-rgb), 0.08);
    border-color: var(--primary-darker);
    border-style: solid;
    box-shadow: inset 0 0 20px rgba(var(--primary-rgb), 0.15);
}
.drop-zone.drag-over::before { opacity: 0.8; transform: translateY(-5px) scale(1.15); }
input[type="file"] { display: none; }

/* --- Info & Preview Sections --- */
.image-info, .output-info, .file-list-display, .text-output-area, .metadata-display-area {
    margin-top: var(--margin-base);
    border-top: 1px solid var(--border-color);
    padding-top: var(--margin-base);
    display: none;
    background-color: var(--light-bg);
    padding: var(--padding-base);
    border-radius: var(--border-radius-md);
}
.image-info p, .output-info p, .metadata-display-area p { margin: 0.6rem 0; font-size: 0.95rem; }
.image-info strong, .output-info strong, .metadata-display-area strong { font-weight: 500; min-width: 150px; display: inline-block;}
.file-list-display h4 { margin-bottom: 0.8rem; font-size: 1.1rem; font-weight: 500; }
.file-list-display ul { list-style: decimal; padding-left: 25px; text-align: left; max-height: 180px; overflow-y: auto; border: 1px solid var(--border-color); padding: 15px; border-radius: var(--border-radius-sm); background-color: var(--content-bg); margin-top: 0.5rem;}
.file-list-display li { margin-bottom: 0.5rem; font-size: 0.9rem; color: var(--secondary-color); }

.image-preview, .pdf-tool-preview {
    margin-top: var(--margin-base); text-align: center; padding-top: var(--margin-base);
    border-top: 1px solid var(--border-color); display: none;
}
 .image-preview + .image-info,
 .pdf-tool-preview + .output-info,
 .pdf-tool-preview + .image-info,
 .image-preview + .text-output-area,
 .image-preview + .output-info, /* For Base64 to Image */
 .image-preview + .metadata-display-area /* For PDF metadata */
  {
     border-top: none; padding-top: 0; margin-top: 0; border-radius: 0 0 var(--border-radius-md) var(--border-radius-md);
 }

.preview-comparison { display: flex; flex-wrap: wrap; justify-content: space-around; gap: 2rem; margin-top: 1rem; }
.preview-comparison > div {
    flex: 1 1 350px;
    max-width: 48%;
    text-align: center; min-height: 250px;
    background-color: var(--light-bg);
    padding: var(--padding-base);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
}
.preview-comparison .preview-label { font-weight: 500; margin-bottom: 1rem; display: block; font-size: 1.1rem; color: var(--secondary-color); }

.image-preview img, .pdf-tool-preview img, .image-preview canvas, .pdf-tool-preview canvas { /* Added canvas for PDF signing etc */
    max-width: 100%; height: auto; border: 1px solid #ddd; padding: 5px;
    background-color: var(--content-bg); box-shadow: var(--shadow-sm);
    display: none; margin: 10px auto; border-radius: var(--border-radius-sm);
    vertical-align: middle;
}
/* For Meme Generator Canvas specifically */
#memeCanvas {
    border: 1px solid var(--border-color); /* Slightly different border for emphasis */
    max-width:100%;
    height:auto;
    display: block; /* Ensures it behaves well in its container */
}
.meme-canvas-container { /* Wrapper for the meme canvas if needed for centering/styling */
    position: relative;
    display: inline-block; /* Or flex for centering */
    max-width:100%;
    border: 1px solid var(--border-color);
    background-color: var(--light-bg);
    padding:10px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 1rem; /* Spacing below the canvas */
}


.preview-comparison img {
    max-width: 100%; max-height: 450px; display: block; margin: 0 auto 1rem auto;
}
/* Specific for PDF page canvas previews in tools like Sign PDF, Crop PDF */
.pdf-page-preview-canvas {
    border: 1px solid var(--primary-color);
    cursor: crosshair; /* For placement tools */
}


.pdf-thumbnails-container { max-height: 400px; overflow-y: auto; padding: 10px; border: 1px solid var(--border-color); border-radius: var(--border-radius-sm); margin-top: 5px; min-height: 100px; background-color: var(--content-bg); }
.pdf-thumbnails-container img { display: inline-block; max-height: 100px; max-width: 75px; margin: 5px; border: 1px solid #ccc; border-radius: var(--border-radius-sm); }
.pdf-embed-preview { border: 1px solid var(--border-color); display: none; width: 100%; height: 500px; margin-top: 10px; background-color: var(--light-bg); border-radius: var(--border-radius-sm); }


.preview-success-message {
    display: none;
    color: var(--success-color);
    margin-top: 15px; text-align: center; font-style: normal; font-weight: 500;
    padding: 0.8rem;
    border: 1px solid var(--success-color);
    border-radius: var(--border-radius-sm);
    background-color: #eafaf1;
    font-size: 0.95rem;
}
/* Placeholder message for complex tools */
.placeholder-message {
    color: var(--info-color);
    margin-top: 15px; text-align: center; font-style: normal; font-weight: 500;
    padding: 0.8rem; border: 1px solid var(--info-color);
    border-radius: var(--border-radius-sm); background-color: #e7f3fa; /* Light blue */
    font-size: 0.95rem;
}
.placeholder-message.error { /* Style for more prominent API errors */
    color: var(--danger-color);
    border-color: var(--danger-color);
    background-color: #fbeae9; /* Light red */
}


/* --- Image Cropper Tool Section & PDF Cropper Visual Selection --- */
.cropper-container { position: relative; display: inline-block; max-width: 100%; vertical-align: middle; }
.crop-selection-overlay {
    position: absolute; border: 1px dashed var(--primary-darker);
    background-color: rgba(var(--primary-rgb), 0.2);
    box-sizing: border-box; display: none;
}
#cropPdfCanvasContainer .crop-selection-overlay { /* Ensure PDF cropper overlay is also styled */
     border: 1px dashed var(--danger-color); /* Make it distinct */
     background-color: rgba(231, 76, 60, 0.15); /* Danger color with alpha for PDF crop */
}


/* --- Homepage --- */
#homepage-section .hero {
    text-align: center; margin-bottom: calc(var(--margin-base) * 2);
    padding: 4rem 2rem; /* Increased padding */
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-darker) 70%, #117a65 100%); /* Deeper gradient */
    color: var(--light-text);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}
#homepage-section .hero::before { /* Subtle pattern overlay */
    content: ""; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    background-image:
        linear-gradient(45deg, rgba(255,255,255,0.03) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.03) 75%, rgba(255,255,255,0.03)),
        linear-gradient(-45deg, rgba(255,255,255,0.03) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.03) 75%, rgba(255,255,255,0.03));
    background-size: 25px 25px; opacity: 0.8; z-index: 0;
}
#homepage-section .hero > * { position: relative; z-index: 1; } /* Ensure content is above overlay */

#homepage-section .hero h2 { color: var(--light-text); margin-top: 0; font-size: 2.8rem; font-weight: 700; text-shadow: 1px 1px 3px rgba(0,0,0,0.15); }
#homepage-section .hero p { font-size: 1.3rem; opacity: 0.95; font-weight: 300; max-width: 700px; margin-left: auto; margin-right: auto; }
#homepage-section .hero .btn {
    background-color: var(--light-text); color: var(--primary-darker); font-weight: 700; margin-top: 1.5rem;
    transform: scale(1.05); padding: 1rem 2.2rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}
#homepage-section .hero .btn:hover {
    background-color: #f8f9fa; color: var(--primary-color);
    box-shadow: 0 6px 20px rgba(0,0,0,0.25), 0 0 10px rgba(var(--primary-rgb),0.2);
}

#homepage-section .tools-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem; margin-top: calc(var(--margin-base) * 1.5);
}
#homepage-section .tool-card {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: calc(var(--padding-base) * 1.2);
    text-align: center; background-color: var(--content-bg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex; flex-direction: column; justify-content: space-between;
    box-shadow: var(--shadow-md);
}
#homepage-section .tool-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-lg), var(--card-hover-glow);
}
.tool-card .icon-container {
    font-size: 4rem; margin-bottom: 1.2rem; line-height: 1;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
    display: inline-block; /* Important for background-clip to work properly */
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275); /* Playful bounce */
}
#homepage-section .tool-card:hover .icon-container {
    transform: scale(1.15) rotate(-8deg);
}
#homepage-section .tool-card h3 { margin-top: 0; margin-bottom: 0.8rem; font-size: 1.3rem; font-weight: 700; }
#homepage-section .tool-card h3 a { color: var(--dark-text); text-decoration: none; }
#homepage-section .tool-card h3 a:hover { color: var(--primary-color); text-decoration: none;}
#homepage-section .tool-card p { font-size: 0.9rem; color: var(--secondary-color); flex-grow: 1; margin-bottom: 1.5rem; font-weight: 300; }
#homepage-section .tool-card .tool-link { margin-top: auto; display: block; }

/* --- Other Sections (About, Contact, Privacy) --- */
#about-section p, #privacy-section p { text-align: left; font-weight: 400; }
#contact-section form { max-width: 600px; margin: 0 auto; display: flex; flex-direction: column; gap: 1.2rem; }
#contact-section label { font-weight: 500; margin-bottom: 0.3rem; display: block; }
#contact-section input[type="text"], #contact-section input[type="email"], #contact-section textarea { width: 100%; }
#contact-section textarea { min-height: 150px; resize: vertical; }
#contact-section button[type="submit"] { align-self: center; margin-top: 0.5rem; }

/* --- Footer --- */
footer {
    margin-top: calc(var(--margin-base) * 2); padding: 2.5rem var(--padding-base);
    background-color: var(--dark-text); color: var(--light-bg); text-align: center;
    border-top: 3px solid var(--primary-color);
}
footer p { margin: 0.5rem 0; font-size: 0.9rem; opacity: 0.8; font-weight: 300; }
footer a { color: var(--primary-color); }
footer a:hover { color: var(--header-link-hover); text-decoration: underline; }

/* --- Ads Placeholder --- */
.ad-container {
    width: 100%; margin: 2.5rem auto; text-align: center;
    background-color: rgba(var(--dark-text-rgb),0.03); padding: 1.5rem;
    border: 1px dashed var(--gray-text);
    min-height: 90px; display: flex; justify-content: center; align-items: center;
    font-size: 0.9rem; color: var(--gray-text); border-radius: var(--border-radius-sm);
    display: none !important; /* Hidden until AdSense code is ready */
}

/* Processing Message with Spinner */
.processing-message {
    display: none; /* Toggled to 'flex' by JS */
    text-align: center;
    margin: 1rem 0;
    color: var(--info-color);
    font-style: italic;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}
.processing-message::before { /* Spinner */
    content: "";
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(var(--info-rgb), 0.3);
    border-radius: 50%;
    border-top-color: var(--info-color);
    animation: spin 1s ease-in-out infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Organize PDF Tool Specific Styles --- */
#organizePageThumbnails .page-thumbnail-item {
    position: relative;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 5px;
    margin: 5px;
    background-color: var(--content-bg);
    cursor: grab;
    transition: transform 0.2s ease-out, box-shadow 0.2s ease-out, border-color 0.2s ease-out, opacity 0.2s ease-out;
    user-select: none;
    text-align: center;
    width: 110px;
}
#organizePageThumbnails .page-thumbnail-item img {
    max-width: 100px;
    max-height: 140px;
    display: block;
    margin-bottom: 5px;
    pointer-events: none;
}
#organizePageThumbnails .page-thumbnail-item .page-number-display {
    font-size: 0.8em;
    color: var(--secondary-color);
}
#organizePageThumbnails .page-thumbnail-item .delete-page-btn {
    position: absolute;
    top: -8px;
    right: -8px;
    background-color: var(--danger-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    font-size: 14px;
    line-height: 22px;
    text-align: center;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    z-index: 10;
    transition: background-color 0.2s ease;
}
#organizePageThumbnails .page-thumbnail-item .delete-page-btn:hover {
    background-color: #c0392b;
}
#organizePageThumbnails .page-thumbnail-item.marked-for-deletion {
    border-color: var(--danger-color);
    opacity: 0.6;
}
#organizePageThumbnails .page-thumbnail-item.marked-for-deletion img {
    filter: grayscale(50%) opacity(0.7);
}
#organizePageThumbnails .page-thumbnail-item.dragging {
    opacity: 0.7;
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
    cursor: grabbing;
    border-style: dashed;
    border-color: var(--primary-color);
}

/* --- Rotate PDF Tool Specific Styles --- */
.rotate-pdf-controls .rotate-icon {
    display: inline-block;
    font-style: normal;
    margin-right: 5px;
    font-size: 1.1em;
    line-height: 1;
    vertical-align: -1px;
}

/* --- Image to Base64 & Base64 to Image --- */
.base64-output-textarea {
    width: 100%;
    min-height: 150px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    resize: vertical;
    margin-bottom: 1rem;
    word-break: break-all;
}
.copy-btn-container {
    text-align: right;
    margin-top: -0.5rem; /* Pull it up slightly */
    margin-bottom: 1rem;
}
/* PDF Page Numbers / Watermark / Compress PDF / Crop PDF / Sign PDF */
.pdf-customization-controls {
    /* display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; */
}
.pdf-customization-controls .control-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}
.pdf-customization-controls input[type="number"],
.pdf-customization-controls input[type="text"],
.pdf-customization-controls input[type="password"],
.pdf-customization-controls select {
    width: auto;
    max-width: 150px;
}
.pdf-customization-controls input[type="color"] {
     width: 50px; height: 35px; padding: 2px; border-radius: var(--border-radius-sm);
}
/* Specific for Meme Generator color pickers if they are inside .tool-controls */
#meme-generator-section .tool-controls input[type="color"] {
     width: 50px; height: 35px; padding: 2px; border-radius: var(--border-radius-sm); vertical-align: middle;
}


/* PDF Metadata Editor Specific Styles */
.metadata-entry {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 1rem;
    margin-bottom: 0.8rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid var(--border-color);
}
.metadata-entry:last-child { border-bottom: none; }
.metadata-entry label {
    flex-basis: 120px;
    font-weight: 500;
    color: var(--dark-text);
    margin-right:0;
}
.metadata-entry input[type="text"], .metadata-entry span {
    flex-grow: 1;
    max-width: 400px;
}
.metadata-entry span {
    padding: 0.8rem 0;
    color: var(--secondary-darker);
    word-break: break-word;
}

/* Image Color Picker Specific Styles */
#colorPickerCanvasContainer {
    position: relative;
    max-width: 600px;
    margin: 1rem auto;
    border: 1px solid var(--border-color);
    cursor: crosshair;
}
#colorPickerCanvas {
    display: block;
    max-width: 100%;
    height: auto;
}
.color-picker-output {
    margin-top: 1rem;
    text-align: center;
    font-size: 1.1rem;
}
.color-picker-output .color-preview-box {
    display: inline-block;
    width: 50px;
    height: 50px;
    border: 1px solid var(--dark-text);
    margin-right: 10px;
    vertical-align: middle;
    border-radius: var(--border-radius-sm);
}
.color-picker-output span {
    display: block;
    margin-top: 0.5rem;
}

/* Sign PDF Tool Specific Styles */
#signPdfSignatureCanvas {
    border: 1px dashed var(--primary-color);
    cursor: crosshair;
    background-color: #fff;
    margin-bottom: 1rem;
}
.signature-creation-area {
    display: flex; flex-direction: column; align-items: center; gap: 1rem;
    padding: 1rem; background-color: var(--light-bg); border-radius: var(--border-radius-md); margin-bottom: 1rem;
}
.signature-creation-area .tabs { margin-bottom: 0.5rem; }
.signature-creation-area .tabs button { margin: 0 0.3rem; }
.signature-creation-area .tabs button.active { background-color: var(--primary-color); color: var(--light-text); }
.signature-creation-area .tab-content { width: 100%; max-width: 400px; }
.signature-type-text-input { width: 100%; }
#signPdfPageViewerCanvasContainer {
    max-width: 700px; margin: 1rem auto;
    position: relative;
}
#signPdfPageViewerCanvas {
    border: 1px solid var(--secondary-color);
    cursor: default;
    max-width:100%;
    height:auto;
}
#signPdfCurrentSignatureControls {
    margin-top: 1rem;
    padding: 0.5rem;
    border: 1px dashed var(--info-color);
    border-radius: var(--border-radius-sm);
    background-color: rgba(var(--info-rgb), 0.1);
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    align-items: center;
}
#signPdfCurrentSignatureControls input[type="text"] { width: 120px; }


/* --- Responsive Adjustments --- */
@media (max-width: 992px) {
     header nav ul {
         gap: 0.8rem;
    }
     header nav ul li .dropdown-content {
        min-width: 200px;
    }

}

@media (max-width: 768px) {
    body { padding-top: 110px; }
    html { font-size: 15px; }
    .container { padding: var(--padding-base); margin: var(--padding-base); }
    h1 { font-size: 2rem; } h2 { font-size: 1.7rem; }
    #homepage-section .hero h2 { font-size: 2.2rem; }
    #homepage-section .hero p { font-size: 1.1rem; }

    header .container { flex-direction: column; align-items: center; gap: 0.8rem; padding-top: 0.5rem; padding-bottom: 0.5rem; }
    header h1 { text-align: center; }
    header nav ul {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem 1rem;
    }
     header nav ul li.dropdown .dropdown-content {
         left: 50%;
         transform: translateX(-50%) translateY(10px);
    }
    header nav ul li.dropdown:hover > .dropdown-content,
    header nav ul li.dropdown .dropbtn:focus + .dropdown-content,
    header nav ul li.dropdown .dropdown-content:hover {
         transform: translateX(-50%) translateY(0);
    }


    .tool-controls { flex-direction: column; align-items: stretch; gap: 1rem; padding: 1rem; }
    .tool-controls label { margin-bottom: 0.5rem; margin-right: 0; }
    input[type="range"] { max-width: none; }
    .dimension-inputs, .crop-inputs, .split-controls { flex-direction: column; align-items: stretch; }
    .dimension-inputs input[type="number"], .crop-inputs input[type="number"], .split-controls input[type="text"] { width: 100%; }
    .convert-controls select, .filter-controls select { width: 100%; }
    .rotate-flip-controls, .filter-controls, .rotate-pdf-controls, .pdf-customization-controls { flex-direction: column; align-items: stretch; }
    .rotate-flip-controls button, .filter-controls button, .rotate-pdf-controls button, .pdf-customization-controls button { width: 100%; margin-top: 0.5rem; }
    .pdf-customization-controls .control-group { flex-direction: column; align-items: stretch; }
    .pdf-customization-controls input[type="number"],
    .pdf-customization-controls input[type="text"],
    .pdf-customization-controls input[type="password"],
    .pdf-customization-controls select { max-width: 100%; }
    #signPdfCurrentSignatureControls input[type="text"] {max-width:100%;}


    .preview-comparison { flex-direction: column; gap: var(--margin-base); }
    .preview-comparison > div { max-width: 100%; padding: 1rem; }
    #contact-section form { padding: 0; }
    .drop-zone { padding: 1.5rem; min-height: 150px; }
    .pdf-embed-preview { height: 400px; }
    #organizePageThumbnails .page-thumbnail-item { width: 90px; }
    #organizePageThumbnails .page-thumbnail-item img { max-width: 80px; max-height: 110px; }
     .metadata-entry label { flex-basis: 100%; text-align: left; }
     .metadata-entry input[type="text"], .metadata-entry span { max-width: 100%; }
     /* Responsive Meme Generator Controls */
    #meme-generator-section .meme-text-control-group {
        flex-direction: column;
        align-items: stretch; /* Make labels full width on small screens */
    }
    #meme-generator-section .meme-text-control-group label {
        margin-bottom: 0.3rem;
    }
    #meme-generator-section .meme-text-control-group input[type="text"] {
         min-width: 100%; /* Make text input full width */
    }
    #meme-generator-section .meme-text-control-group input[type="color"] {
        align-self: flex-start; /* Align color picker to the start of its flex line */
        margin-left: 0; /* Reset margin */
        margin-top: 0.5rem; /* Add some space */
    }
}