/* Hide & Seek Steganography Tool - Matching Site Design */

.center-header {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    text-align: center;
    width: 100%;
    gap: 12px;
}

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

:root {
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 2.5rem;
    --space-3xl: 3rem;
    --space-4xl: 4rem;
    --space-5xl: 5rem;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    --text-primary-color: #ffffff;
    --text-secondary-color: rgba(255, 255, 255, 0.8);
    --background-color: #000000;
    --primary-color: #4ade80;
    --accent-color: #22c55e;
    
    /* Typography Scale */
    --font-xs: 0.75rem;
    --font-sm: 0.875rem;
    --font-base: 1rem;
    --font-lg: 1.125rem;
    --font-xl: 1.25rem;
    --font-2xl: 1.5rem;
    --font-3xl: 1.875rem;
    --font-4xl: 2.25rem;
    --font-5xl: 3rem;
    
    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
}

/* Background */
body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('../images/desktop Bg image.webp');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    min-height: 100vh;
    color: white;
    overflow-x: hidden;
}

/* Mobile background */
@media (max-width: 768px) {
    body {
        background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('../images/mobile Bg image.webp');
        background-size: cover;
        background-position: center;
        background-attachment: fixed;
    }
}

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

/* Cards */
.card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    transition: all 0.3s ease;
    margin-bottom: 30px;
}

.card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Back Button */
.back-button {
    position: absolute;
    top: 30px;
    left: 30px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 12px 20px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 500;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 1000;
}

.back-button:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.back-button i {
    font-size: 16px;
}

/* Header */
.page-header {
    text-align: center;
    padding: 80px 0 60px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 0.9rem;
    opacity: 0.8;
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.breadcrumb a:hover {
    opacity: 0.8;
}

.page-header h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 15px;
}

.gradient-text {
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.emoji-visible {
    font-size: 3.5rem;
}

.page-header p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Tool Section */
.tool-section {
    padding: 0 0 80px;
}

/* Card Headers */
.card-header {
    text-align: center;
    padding: 30px 30px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.tool-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.tool-name {
    font-size: 1.8rem;
    font-weight: 700;
    color: white;
    margin-bottom: 10px;
}

.tool-description {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
    line-height: 1.6;
    max-width: 500px;
    margin: 0 auto;
}

/* Card Content */
.card-content {
    padding: 30px;
}

/* Form Styles */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    color: white;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.form-input {
    width: 100%;
    padding: 15px 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(5px);
    color: white;
    font-size: 1rem;
    transition: all 0.3s ease;
    resize: vertical;
    font-family: inherit;
}

.form-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.1);
}

.form-input[type="file"] {
    padding: 12px 15px;
    cursor: pointer;
}

.form-input[type="file"]::-webkit-file-upload-button {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 8px 16px;
    border-radius: 8px;
    margin-right: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-input[type="file"]::-webkit-file-upload-button:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 15px 30px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    justify-content: center;
    min-width: 160px;
    font-family: inherit;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(74, 222, 128, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Download Section */
#downloadSection {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Tool Output */
.tool-output {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 20px;
    color: white;
    font-family: 'Monaco', 'Consolas', monospace;
    white-space: pre-wrap;
    word-break: break-word;
    backdrop-filter: blur(5px);
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 0.95rem;
    line-height: 1.5;
}

.tool-output.success {
    border-color: #10b981;
    background: rgba(16, 185, 129, 0.1);
}

.tool-output.error {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

/* Card Layout */
.hide-message-card,
.reveal-message-card {
    max-width: 600px;
    margin: 0 auto 30px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .page-header {
        padding: 60px 0 40px;
    }
    
    .page-header h1 {
        font-size: 2.5rem;
    }
    
    .emoji-visible {
        font-size: 2.5rem;
    }
    
    .page-header p {
        font-size: 1rem;
    }
    
    .card-header,
    .card-content {
        padding: 20px;
    }
    
    .back-button {
        top: 20px;
        left: 20px;
        padding: 10px 16px;
        font-size: 0.9rem;
    }
    
    .tool-name {
        font-size: 1.5rem;
    }
    
    .tool-icon {
        font-size: 2.5rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
        min-width: 140px;
    }
    
    .center-header {
        flex-direction: column;
        gap: 8px;
    }
}

@media (max-width: 480px) {
    .page-header h1 {
        font-size: 2rem;
    }
    
    .emoji-visible {
        font-size: 2rem;
    }
    
    .card-header,
    .card-content {
        padding: 15px;
    }
    
    .tool-name {
        font-size: 1.3rem;
    }
}

/* Drag and Drop States */
.form-group.dragover {
    background: rgba(74, 222, 128, 0.1);
    border-color: var(--primary-color);
}

.form-group.dragover .form-input {
    border-color: var(--primary-color);
    background: rgba(74, 222, 128, 0.05);
}

/* Features Section */
.features-section {
    padding: 80px 0;
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: 15px;
}

.section-description {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 30px 25px;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: white;
    margin-bottom: 15px;
}

.feature-card p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* FAQ Section */
.faq {
    padding: 80px 0;
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.faq-header {
    text-align: center;
    margin-bottom: 50px;
}

.faq-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: 15px;
}

.faq-header p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    margin-bottom: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.faq-question {
    padding: 25px 30px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.faq-question h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    margin: 0;
    flex: 1;
    padding-right: 20px;
}

.faq-toggle {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--primary-color);
    transition: transform 0.3s ease;
    min-width: 20px;
    text-align: center;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding: 25px 30px;
}

.faq-answer p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
    margin: 0;
    font-size: 0.95rem;
}

/* Responsive Design for New Sections */
@media (max-width: 768px) {
    .features-section,
    .faq {
        padding: 60px 0;
    }
    
    .section-title,
    .faq-header h2 {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .feature-card {
        padding: 25px 20px;
    }
    
    .feature-icon {
        font-size: 2.5rem;
    }
    
    .faq-question {
        padding: 20px 25px;
    }
    
    .faq-item.active .faq-answer {
        padding: 20px 25px;
    }
    
    .faq-question h3 {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .features-section,
    .faq {
        padding: 40px 0;
    }
    
    .section-title,
    .faq-header h2 {
        font-size: 1.8rem;
    }
    
    .feature-card {
        padding: 20px 15px;
    }
    
    .faq-question {
        padding: 15px 20px;
    }
    
    .faq-item.active .faq-answer {
        padding: 15px 20px;
    }
}