:root {
    --primary-color: #3B82F6;
    --secondary-color: #10B981;
    --accent-color: #8B5CF6;
    --text-color: #111827;
    --text-secondary: #4B5563;
    --text-tertiary: #6B7280;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --border-color: #E5E7EB;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-base: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;    
    --radius-2xl: 1.5rem;
    
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    
    --danger-color: #EF4444;
    --danger-light: #FCA5A5;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    
    --brand-primary: var(--primary-color);
    --brand-secondary: var(--secondary-color);
    --text-primary: var(--text-color);
}

[data-theme="dark"] {
    --text-color: #F9FAFB;
    --text-secondary: #D1D5DB;
    --text-tertiary: #9CA3AF;
    --bg-primary: #111827;
    --bg-secondary: #1F2937;
    --bg-tertiary: #374151;
    --border-color: #374151;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
}

body {
    background: var(--bg-primary);
}

[data-theme="dark"] body {
    background: var(--bg-primary);
}

.tool-hero {
    margin-top: 0;
    padding: 120px 0 80px;
    position: relative;
    z-index: 2;
    background: linear-gradient(135deg, var(--bg-primary) 0%, rgba(59, 130, 246, 0.1) 30%, rgba(16, 185, 129, 0.1) 70%, var(--bg-primary) 100%);
    overflow: hidden;
}

.tool-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
    animation: heroBackgroundPulse 8s ease-in-out infinite;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 3;
}

.hero-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    margin: 0 auto 30px auto;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);
    border-radius: 50%;
    box-shadow: 
        0 15px 35px rgba(59, 130, 246, 0.4),
        0 0 0 10px rgba(59, 130, 246, 0.1),
        0 0 0 20px rgba(59, 130, 246, 0.05);
    animation: heroIconFloat 6s ease-in-out infinite;
    position: relative;
}

.hero-icon::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: linear-gradient(45deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    border-radius: 50%;
    animation: heroIconRotate 20s linear infinite;
}

.hero-icon i {
    font-size: 2.5rem;
    color: white;
    z-index: 2;
    position: relative;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin: 0 0 1.5rem 0;
    background: linear-gradient(135deg, var(--text-color) 0%, var(--primary-color) 50%, var(--secondary-color) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

/* Tools Grid Section */
.tools-grid-section {
    padding: 80px 0;
    background: var(--bg-primary);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 5rem;
}

.tool-card {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: 2.5rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.05), transparent);
    transition: left 0.5s ease;
}

.tool-card:hover::before {
    left: 100%;
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.tool-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-xl);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
}

.tool-card:hover .tool-icon {
    transform: scale(1.1) rotate(5deg);
}

.tool-icon i {
    font-size: 1.8rem;
    color: white;
}

.tool-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 1rem 0;
    color: var(--text-color);
}

.tool-card p {
    color: var(--text-secondary);
    margin: 0 0 2rem 0;
    line-height: 1.6;
}

.tool-action {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.tool-card:hover .tool-action {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.action-text {
    font-weight: 600;
    font-size: 0.95rem;
}

.tool-action i {
    font-size: 1rem;
    transition: transform 0.3s ease;
}

.tool-card:hover .tool-action i {
    transform: translateX(5px);
}

/* Features Section */
.features-section {
    background: var(--bg-secondary);
    padding: 4rem;
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-color);
}

.features-section h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 3rem 0;
    color: var(--text-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
}

.feature-item {
    text-align: center;
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    margin: 0 auto 1.5rem auto;
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
}

.feature-icon i {
    font-size: 2rem;
    color: white;
}

.feature-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 1rem 0;
    color: var(--text-color);
}

.feature-item p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* Animations */
@keyframes heroBackgroundPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

@keyframes heroIconFloat {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

@keyframes heroIconRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .tool-hero {
        padding: 100px 0 60px;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.1rem;
    }
    
    .hero-icon {
        width: 80px;
        height: 80px;
    }
    
    .hero-icon i {
        font-size: 2rem;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .tool-card {
        padding: 2rem;
    }
    
    .features-section {
        padding: 3rem 2rem;
    }
    
    .features-section h2 {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .tool-card {
        padding: 1.5rem;
    }
    
    .features-section {
        padding: 2rem 1.5rem;
    }
}