/* ========================================
   ALL-IN-ONE ONLINE TOOLS - CUSTOM CSS
   ======================================== */

:root {
    /* Light Mode - Bright & Vibrant */
    --primary-color: #5865f2;
    --secondary-color: #00d4ff;
    --bg-light: #ffffff;
    --card-light: #f9fafb;
    --text-light: #1f2937;
    --border-light: #e5e7eb;
    
    /* Dark Mode - Softer & Readable */
    --bg-dark: #1e293b;
    --bg-darker: #0f172a;
    --card-dark: #334155;
    --text-dark: #ffffff;
    --text-dark-secondary: #e2e8f0;
    --border-dark: #475569;
}

/* ========== LIGHT MODE (DEFAULT) ========== */
body {
    background: linear-gradient(135deg, #f0f4ff 0%, #ffffff 50%, #f0f9ff 100%);
    color: var(--text-light);
    min-height: 100vh;
    transition: all 0.3s ease;
}

/* ========== DARK MODE ========== */
body.dark-mode {
    background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-dark) 50%, #1e3a5f 100%);
    color: var(--text-dark);
}

body.dark-mode .card {
    background-color: var(--card-dark);
    color: var(--text-dark);
    border: 1px solid var(--border-dark);
}

body.dark-mode .navbar {
    background-color: var(--bg-dark) !important;
    border-bottom: 1px solid var(--border-dark);
}

body.dark-mode .navbar-brand {
    color: var(--text-dark) !important;
}

body.dark-mode .modal-content {
    background-color: var(--card-dark);
    color: var(--text-dark);
}

body.dark-mode .modal-header {
    background: linear-gradient(135deg, #5865f2, #00d4ff);
    border-bottom: 1px solid var(--border-dark);
}

body.dark-mode .form-control,
body.dark-mode .form-select,
body.dark-mode textarea {
    background-color: var(--bg-dark);
    color: var(--text-dark);
    border-color: var(--border-dark);
}

body.dark-mode .form-control:focus,
body.dark-mode .form-select:focus,
body.dark-mode textarea:focus {
    background-color: var(--bg-dark);
    color: var(--text-dark);
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 212, 255, 0.25);
}

body.dark-mode .guide-content {
    color: var(--text-dark);
}

body.dark-mode .guide-content h3,
body.dark-mode .guide-content h4 {
    color: var(--secondary-color);
}

body.dark-mode .guide-step {
    background-color: var(--bg-dark);
    color: var(--text-dark);
    border-left-color: var(--secondary-color);
}

body.dark-mode .guide-tips {
    background-color: rgba(0, 212, 255, 0.1);
    border-left-color: var(--secondary-color);
    color: var(--text-dark);
}

body.dark-mode .guide-warning {
    background-color: rgba(255, 193, 7, 0.1);
    border-left-color: #ffc107;
    color: var(--text-dark);
}

body.dark-mode .guide-success {
    background-color: rgba(34, 197, 94, 0.1);
    border-left-color: #22c55e;
    color: var(--text-dark);
}

body.dark-mode .nav-tabs .nav-link {
    color: var(--text-dark-secondary);
}

body.dark-mode .nav-tabs .nav-link.active {
    background-color: var(--bg-dark);
    color: var(--text-dark);
    border-color: var(--border-dark) var(--border-dark) var(--bg-dark);
}

body.dark-mode .nav-tabs {
    border-bottom-color: var(--border-dark);
}

body.dark-mode .btn-outline-secondary {
    color: var(--text-dark);
    border-color: var(--border-dark);
}

/* Dark mode for About section elements */
body.dark-mode .feature-card,
body.dark-mode .use-case,
body.dark-mode .category-overview,
body.dark-mode .seo-content {
    background-color: var(--card-dark) !important;
    color: var(--text-dark) !important;
    border: 1px solid var(--border-dark);
}

body.dark-mode .bg-white {
    background-color: var(--card-dark) !important;
    color: var(--text-dark) !important;
}

body.dark-mode .text-muted {
    color: var(--text-dark-secondary) !important;
}

/* Dark mode for background sections */
body.dark-mode .bg-light {
    background-color: var(--bg-dark) !important;
    color: var(--text-dark) !important;
}

body.dark-mode .about-section {
    background-color: var(--bg-dark) !important;
}

body.dark-mode .btn-outline-secondary:hover {
    background-color: var(--border-dark);
    color: var(--text-dark);
}

body.dark-mode .result-area {
    background-color: var(--bg-dark);
    color: var(--text-dark);
}

body.dark-mode .file-upload-area {
    border-color: var(--border-dark);
    color: var(--text-dark);
}

body.dark-mode .file-upload-area:hover {
    border-color: var(--secondary-color);
    background-color: rgba(0, 212, 255, 0.05);
}

body.dark-mode .tool-category {
    color: var(--secondary-color);
}

body.dark-mode .tool-description {
    color: var(--text-dark-secondary);
}

body.dark-mode code {
    background-color: var(--bg-dark);
    color: #f472b6;
}

body.dark-mode footer {
    color: var(--text-dark-secondary);
}

body.dark-mode .search-box input {
    background-color: var(--card-dark);
    color: var(--text-dark);
    border-color: var(--border-dark);
}

body.dark-mode .search-box input::placeholder {
    color: var(--text-dark-secondary);
    opacity: 0.6;
}

/* ========== NAVBAR ========== */
.navbar {
    background-color: var(--card-light) !important;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========== SEARCH SECTION ========== */
.search-section {
    padding: 3rem 0;
    text-align: center;
}

.search-section h1 {
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.search-section p {
    font-size: 1.1rem;
    opacity: 0.85;
    margin-bottom: 2rem;
}

.search-box {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-box input {
    padding: 0.75rem 3rem 0.75rem 1.5rem;
    border-radius: 50px;
    border: 2px solid var(--border-light);
    font-size: 1rem;
    background: white;
    transition: all 0.3s ease;
}

.search-box input:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.search-box i {
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
    font-size: 1.2rem;
}

/* ========== TOOL CARDS ========== */
.tool-card {
    transition: all 0.3s ease;
    border: 1px solid var(--border-light);
    border-radius: 15px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    height: 100%;
    cursor: pointer;
    background: white;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(88, 101, 242, 0.15);
    border-color: var(--secondary-color);
}

.tool-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tool-category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.tool-title {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.tool-description {
    font-size: 0.9rem;
    opacity: 0.7;
    margin-bottom: 1rem;
}

/* ========== CATEGORY FILTER ========== */
.category-filter {
    margin: 2rem 0;
    text-align: center;
}

.category-filter .btn {
    margin: 0.25rem;
    border-radius: 25px;
    padding: 0.5rem 1.5rem;
    border: 2px solid #dee2e6;
    background: white;
    color: #6c757d;
    transition: all 0.3s ease;
    font-weight: 500;
}

.category-filter .btn:hover {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 212, 255, 0.2);
}

.category-filter .btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    color: white !important;
    border: none !important;
    box-shadow: 0 4px 12px rgba(88, 101, 242, 0.3) !important;
    transform: scale(1.05);
}

/* Dark mode support for category filter */
body.dark-mode .category-filter .btn {
    background: var(--card-dark);
    color: var(--text-dark);
    border-color: var(--border-dark);
}

body.dark-mode .category-filter .btn:hover {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

body.dark-mode .category-filter .btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    color: white !important;
    border: none !important;
}

/* ========== THEME TOGGLE ========== */
.theme-toggle {
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    background-color: rgba(0,0,0,0.1);
}

/* ========== FOOTER ========== */
footer {
    margin-top: 4rem;
    padding: 2rem 0;
    text-align: center;
    opacity: 0.7;
}

/* ========== MODAL ========== */
.modal-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 10px 10px 0 0;
}

.modal-body {
    padding: 2rem;
}

/* ========== TOOL INTERFACE ========== */
.tool-interface {
    padding: 1rem;
}

.file-upload-area {
    border: 2px dashed #ccc;
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.file-upload-area:hover {
    border-color: var(--primary-color);
    background-color: rgba(79, 70, 229, 0.05);
}

.file-upload-area i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.result-area {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: 10px;
    display: none;
}

.btn-copy {
    position: absolute;
    top: 10px;
    right: 10px;
}

/* ========== ANIMATIONS ========== */
@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.tool-card {
    animation: fadeIn 0.5s ease;
}

#toolsCounter {
    animation: slideIn 0.3s ease;
    transition: all 0.3s ease;
}

.category-filter .btn.active {
    animation: pulse 0.4s ease;
}

/* ========== LOADING SPINNER ========== */
.spinner-container {
    display: none;
    text-align: center;
    padding: 2rem;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .search-section h1 {
        font-size: 1.75rem;
    }
    
    .tool-icon {
        font-size: 2rem;
    }
}

/* ========== GUIDE CONTENT STYLES ========== */
.guide-content {
    padding: 1rem;
}

.guide-content h3 {
    color: var(--primary-color);
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.guide-content h4 {
    color: var(--secondary-color);
    margin-top: 1rem;
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.guide-step {
    background: #f8f9fa;
    border-left: 4px solid var(--primary-color);
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 0 8px 8px 0;
}

.guide-step strong {
    color: var(--primary-color);
    display: block;
    margin-bottom: 0.5rem;
}

.guide-tips {
    background: #e7f3ff;
    border-left: 4px solid #0dcaf0;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 0 8px 8px 0;
}

.guide-warning {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 0 8px 8px 0;
}

.guide-success {
    background: #d1e7dd;
    border-left: 4px solid #198754;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 0 8px 8px 0;
}

.guide-content ul {
    list-style: none;
    padding-left: 0;
}

.guide-content ul li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
}

.guide-content ul li:before {
    content: "✓";
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: 0;
}

.guide-content ol {
    padding-left: 1.5rem;
}

.guide-content ol li {
    margin-bottom: 0.75rem;
    padding-left: 0.5rem;
}

.guide-content code {
    background: #f8f9fa;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.9rem;
    color: #d63384;
}

.guide-content kbd {
    background: #212529;
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
}

.nav-tabs .nav-link {
    color: #6c757d;
    border: none;
    border-bottom: 2px solid transparent;
    font-weight: 500;
}

.nav-tabs .nav-link.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    background: transparent;
}

.nav-tabs .nav-link:hover {
    border-color: transparent;
    color: var(--primary-color);
}

.nav-tabs {
    border-bottom: 1px solid #dee2e6;
}

/* ========== TOOLS SEARCH SECTION ========== */
.tools-search-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-bottom: 1px solid #e9ecef;
    position: relative;
}

.tools-search-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, #007bff 50%, transparent 100%);
}

.tools-search-section .search-box {
    position: relative;
    margin-bottom: 1rem;
}

.tools-search-section .search-box input {
    padding: 0.75rem 3rem 0.75rem 1rem;
    border: 2px solid #e9ecef;
    border-radius: 50px;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.tools-search-section .search-box input:focus {
    border-color: #007bff;
    box-shadow: 0 4px 16px rgba(0,123,255,0.2);
    transform: translateY(-1px);
}

.tools-search-section .search-box i {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #6c757d;
    font-size: 1.1rem;
}

.tools-search-section .popular-tools button {
    margin: 0.25rem;
    border-radius: 20px;
    font-size: 0.85rem;
    padding: 0.4rem 0.8rem;
    transition: all 0.2s ease;
}

.tools-search-section .popular-tools button:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0,123,255,0.3);
}

/* Dark Mode for Tools Search Section */
body.dark-mode .tools-search-section {
    background: linear-gradient(135deg, var(--card-dark) 0%, var(--bg-dark) 100%);
    border-bottom: 1px solid var(--border-dark);
}

body.dark-mode .tools-search-section .search-box input {
    background: var(--bg-dark);
    border-color: var(--border-dark);
    color: var(--text-dark);
}

body.dark-mode .tools-search-section .search-box input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 4px 16px rgba(88,101,242,0.3);
}

body.dark-mode .tools-search-section .search-box i {
    color: var(--text-dark-secondary);
}