/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fafafa;
    overflow-x: hidden;
}

/* Header Styles */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2563eb !important;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.3s ease;
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.brand-icon {
    font-size: 1.8rem;
    filter: drop-shadow(0 2px 4px rgba(37, 99, 235, 0.3));
}

.nav-link {
    color: #64748b !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #2563eb !important;
    background-color: rgba(37, 99, 235, 0.1);
    transform: translateY(-1px);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn-3d {
    background: linear-gradient(145deg, #3b82f6, #2563eb);
    border: none;
    color: white;
    padding: 12px 30px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4), 0 2px 4px rgba(0, 0, 0, 0.1);
    text-decoration: none;
}

.btn-3d:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.5), 0 4px 8px rgba(0, 0, 0, 0.15);
    color: white;
}

.btn-3d:active {
    transform: translateY(0) scale(0.98);
    box-shadow: 0 2px 10px rgba(37, 99, 235, 0.4);
}

/* Sections */
.tools-section {
    padding: 80px 0;
    background: white;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: #1e293b;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6);
    border-radius: 2px;
}

/* Tool Categories */
.tool-categories {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.category-btn {
    background: white;
    border: 2px solid #e2e8f0;
    color: #64748b;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.category-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s;
}

.category-btn:hover::before {
    left: 100%;
}

.category-btn:hover {
    border-color: #3b82f6;
    color: #3b82f6;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.15);
}

.category-btn.active {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    border-color: #2563eb;
    color: white;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
}

/* Tool Panels */
.tool-panels {
    position: relative;
    min-height: 400px;
}

.tool-panel {
    display: none;
    animation: fadeInUp 0.5s ease;
}

.tool-panel.active {
    display: block;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Tool Cards */
.tool-card {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #f1f5f9;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6, #ec4899);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.tool-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    border-color: #e0e7ff;
}

.tool-card:hover::before {
    transform: scaleX(1);
}

.tool-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: #3b82f6;
    transition: all 0.3s ease;
}

.tool-card:hover .tool-icon {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: white;
    transform: scale(1.1) rotate(5deg);
}

.tool-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #1e293b;
}

.tool-card p {
    color: #64748b;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.tool-btn {
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
    border: 2px solid #e2e8f0;
    color: #3b82f6;
    padding: 10px 24px;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.tool-card:hover .tool-btn {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    border-color: #2563eb;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

/* Color Tools */
.color-picker-container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.color-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 12px;
    margin-bottom: 2rem;
}

.color-item {
    aspect-ratio: 1;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 3px solid transparent;
    position: relative;
    overflow: hidden;
}

.color-item::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.3s ease;
}

.color-item:hover {
    transform: scale(1.1);
    border-color: rgba(255, 255, 255, 0.8);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.color-item:hover::before {
    width: 100%;
    height: 100%;
}

.color-item.active {
    border-color: white;
    transform: scale(1.15);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.color-info {
    background: #f8fafc;
    border-radius: 12px;
    padding: 1.5rem;
}

.selected-color {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.color-preview {
    width: 80px;
    height: 80px;
    border-radius: 12px;
    border: 3px solid white;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.color-preview:hover {
    transform: scale(1.05);
}

.color-codes {
    flex: 1;
}

.code-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.code-item label {
    font-weight: 600;
    color: #374151;
    min-width: 50px;
}

.code-item input {
    flex: 1;
    padding: 8px 12px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-family: monospace;
    font-size: 0.9rem;
    background: white;
}

.copy-btn {
    background: #f3f4f6;
    border: none;
    padding: 8px;
    border-radius: 6px;
    cursor: pointer;
    color: #6b7280;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    background: #3b82f6;
    color: white;
    transform: scale(1.1);
}

/* About Section */
.about-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.about-text {
    font-size: 1.1rem;
    color: #4b5563;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.about-features {
    margin-top: 2rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    font-weight: 500;
    color: #374151;
}

.feature-item i {
    color: #10b981;
    width: 20px;
    height: 20px;
}

.about-image {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 400px;
    position: relative;
}

.tools-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    max-width: 300px;
}

.showcase-item {
    width: 120px;
    height: 120px;
    background: white;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.showcase-item:hover {
    transform: scale(1.1) rotate(5deg);
}

/* Contact Section */
.contact-section {
    padding: 80px 0;
    background: white;
}

.contact-text {
    font-size: 1.1rem;
    color: #6b7280;
    margin-bottom: 3rem;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.1rem;
}

.contact-item i {
    color: #3b82f6;
    width: 24px;
    height: 24px;
}

.contact-item a {
    color: #374151;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: #3b82f6;
}

/* Footer */
.footer {
    background: #1f2937;
    color: #d1d5db;
    padding: 3rem 0 2rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
}

.footer-text {
    color: #9ca3af;
    margin-bottom: 1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    margin-bottom: 1rem;
    justify-content: end;
}

.footer-links a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #3b82f6;
}

.footer-credits {
    color: #9ca3af;
    font-size: 0.9rem;
}

/* Modal Styles */
.modal-content {
    border-radius: 16px;
    border: none;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-header {
    border-bottom: 1px solid #f1f5f9;
    padding: 1.5rem;
}

.modal-body {
    padding: 2rem;
}

/* File Upload Styles */
.file-upload-area {
    border: 2px dashed #cbd5e1;
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    background: #f8fafc;
    transition: all 0.3s ease;
    cursor: pointer;
}

.file-upload-area:hover {
    border-color: #3b82f6;
    background: #f0f9ff;
}

.file-upload-area.dragover {
    border-color: #2563eb;
    background: #dbeafe;
    transform: scale(1.02);
}

.upload-icon {
    font-size: 3rem;
    color: #94a3b8;
    margin-bottom: 1rem;
}

.upload-text {
    font-size: 1.1rem;
    color: #475569;
    margin-bottom: 0.5rem;
}

.upload-hint {
    font-size: 0.9rem;
    color: #94a3b8;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(5px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 10000;
}

.loading-overlay.active {
    display: flex;
}

.loading-spinner {
    text-align: center;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid #f3f4f6;
    border-top: 4px solid #3b82f6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Toast Notification */
.toast {
    background: white;
    border: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border-radius: 12px;
}

.toast-header {
    background: #f8fafc;
    border-bottom: 1px solid #e2e8f0;
    border-radius: 12px 12px 0 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .tool-categories {
        flex-direction: column;
        align-items: center;
    }
    
    .category-btn {
        min-width: 200px;
        justify-content: center;
    }
    
    .selected-color {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .color-grid {
        grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
        gap: 8px;
    }
    
    .contact-info {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }
    
    .footer-links {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .showcase-item {
        width: 100px;
        height: 100px;
        font-size: 2.5rem;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .tool-card {
        padding: 1.5rem;
    }
    
    .color-picker-container {
        padding: 1.5rem;
    }
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass-effect {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Focus Styles for Accessibility */
button:focus,
.btn:focus,
.nav-link:focus {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .loading-overlay,
    .modal {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .hero-section {
        background: white !important;
        color: black !important;
    }
}