/*
 * PNGStock Image Compressor Pro - CSS Stylesheet
 * Premium UI/UX Design System
 */

:root,
[data-bs-theme="light"] {
    --primary-gradient: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #EC4899 100%);
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    
    --bg-page: #f8fafc;
    --bg-glass: rgba(255, 255, 255, 0.75);
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --bg-input: #ffffff;
    
    --text-primary: #0f172a;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.04);
    --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.01);
}

[data-bs-theme="dark"] {
    --primary-gradient: linear-gradient(135deg, #6366F1 0%, #8B5CF6 50%, #EC4899 100%);
    --primary-color: #818cf8;
    --primary-hover: #6366f1;
    
    --bg-page: #080c14;
    --bg-glass: rgba(15, 23, 42, 0.75);
    --bg-card: #111827;
    --bg-card-hover: #1f2937;
    --bg-input: #030712;
    
    --text-primary: #f9fafb;
    --text-muted: #9ca3af;
    --border-color: #1f2937;
    --border-hover: #374151;
    
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.4), 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Base resets & typography */
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-page);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3, h4, h5, h6, .brand-text {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
}

/* Custom Gradients and text effects */
.text-primary-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.btn-primary-gradient {
    background: var(--primary-gradient);
    color: #ffffff !important;
    border: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}
.btn-primary-gradient:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
    filter: brightness(1.1);
}

/* Glassmorphism templates */
.navbar-glass {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--glass-shadow);
    z-index: 1020;
}

.dropdown-menu-glass {
    background: var(--bg-glass) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color) !important;
}

.card-glass {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.card-glass:hover {
    border-color: var(--border-hover);
}

/* Interactive elements */
.nav-link {
    color: var(--text-muted);
    font-weight: 500;
    transition: color 0.2s ease;
}
.nav-link:hover, .nav-link.active {
    color: var(--text-primary) !important;
}

.footer-link {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-link:hover {
    color: var(--text-primary);
    padding-left: 4px;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    transition: all 0.2s ease;
    text-decoration: none;
}
.social-link:hover {
    background: var(--primary-gradient);
    color: #ffffff;
    border-color: transparent;
    transform: scale(1.08);
}

/* Forms styling */
.form-control, .form-select {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 10px;
}
.form-control:focus, .form-select:focus {
    background-color: var(--bg-input);
    border-color: var(--primary-color);
    color: var(--text-primary);
    box-shadow: 0 0 0 0.25rem rgba(99, 102, 241, 0.15);
}

/* Custom range inputs */
.form-range::-webkit-slider-runnable-track {
    background: var(--border-color);
    height: 6px;
    border-radius: 3px;
}
.form-range::-webkit-slider-thumb {
    background: var(--primary-color);
    width: 16px;
    height: 16px;
    margin-top: -5px;
    border-radius: 50%;
    transition: background-color 0.2s;
}
.form-range::-webkit-slider-thumb:hover {
    background: var(--primary-hover);
}

/* Drag and Drop Zone */
.dropzone-container {
    border: 3px dashed var(--border-color);
    background-color: var(--bg-card);
    border-radius: 24px;
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--card-shadow);
    position: relative;
    overflow: hidden;
}
.dropzone-container:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-card-hover);
    transform: translateY(-2px);
}
.dropzone-container.drag-active {
    border-color: var(--primary-color);
    background-color: rgba(99, 102, 241, 0.08);
    transform: scale(0.99);
}

/* Queue List Container */
.queue-card-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem;
    display: grid;
    grid-template-columns: 80px 1fr auto;
    gap: 1.5rem;
    align-items: center;
    transition: transform 0.2s, border-color 0.2s;
}
.queue-card-item:hover {
    border-color: var(--border-hover);
}
.queue-thumbnail {
    width: 80px;
    height: 60px;
    object-fit: contain;
    border-radius: 8px;
    background: repeating-conic-gradient(#f1f5f9 0% 25%, #cbd5e1 0% 50%) 0 / 14px 14px;
}
[data-bs-theme="dark"] .queue-thumbnail {
    background: repeating-conic-gradient(#1f2937 0% 25%, #0f172a 0% 50%) 0 / 14px 14px;
}

/* Analytics reporting widget card */
.analytics-icon-badge {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

/* Hero Section */
.hero-section {
    padding: 7rem 0 5rem;
    position: relative;
    overflow: hidden;
}
.hero-bg-gradient {
    position: absolute;
    width: 60vw;
    height: 60vw;
    top: -30vw;
    right: -10vw;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, rgba(236, 72, 153, 0.04) 50%, rgba(0,0,0,0) 100%);
    z-index: -1;
    pointer-events: none;
}

/* Tool settings toolbar */
.settings-toolbar {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 1.5rem;
}

/* Step cards styling */
.step-card {
    position: relative;
}
.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: white;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

/* Accordion FAQs adjustments */
.accordion-button:not(.collapsed) {
    background-color: rgba(99, 102, 241, 0.08);
    color: var(--primary-color);
}
.accordion-button:focus {
    box-shadow: 0 0 0 0.25rem rgba(99, 102, 241, 0.15);
}

/* Spin animations */
.spin-anim {
    animation: spin-loop 1s linear infinite;
    display: inline-block;
}
@keyframes spin-loop {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@media (max-width: 767.98px) {
    .queue-card-item {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 0.75rem;
    }
    .queue-thumbnail {
        margin: 0 auto;
    }
}

/* Premium preset card styles (btn-check style) */
.btn-check + .btn-outline-secondary {
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    color: var(--text-primary);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--card-shadow);
}
.btn-check + .btn-outline-secondary:hover {
    border-color: var(--primary-color);
    background-color: var(--bg-card-hover);
    color: var(--text-primary);
    transform: translateY(-1px);
}
.btn-check:checked + .btn-outline-secondary {
    border-color: var(--primary-color) !important;
    background: rgba(99, 102, 241, 0.08) !important;
    color: var(--primary-color) !important;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}
.font-size-xs {
    font-size: 0.75rem;
}

/* Article Page Typography Styles */
.article-content {
    font-size: 1.05rem;
    line-height: 1.8;
}
.article-content h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-top: 2rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}
.article-content h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}
.article-content p {
    margin-bottom: 1.25rem;
    color: var(--text-muted);
}
.article-content ul, .article-content ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
    color: var(--text-muted);
}
.article-content li {
    margin-bottom: 0.5rem;
}
.article-content strong {
    color: var(--text-primary);
}

/* Theme-specific Logo Display & Styling */
[data-bs-theme="light"] .theme-dark-logo { display: none !important; }
[data-bs-theme="dark"] .theme-light-logo { display: none !important; }
.brand-logo-img {
    max-height: 38px;
    object-fit: contain;
    width: auto;
}