/* Modern CSS Reset & Variables */
 :root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #93c5fd;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-600: #475569;
    --gray-800: #1e293b;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

/* Modern Reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Base Styles */
body {
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.5;
}

/* Modern Header */
.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: clamp(2rem, 8vw, 5rem) 1rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
    opacity: 0.6;
    animation: rotate 60s linear infinite;
}

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

.header__content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.header__title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
}

.header__description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* Main Content */
.container {
    max-width: 1200px;
    margin: -3rem auto 4rem;
    padding: 0 1.5rem;
    position: relative;
    z-index: 1;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 350px), 1fr));
    gap: 1.5rem;
}

/* Modern Card Design */
.tool-card {
    background: white;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    position: relative;
    isolation: isolate;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    border: 1px solid rgba(0,0,0,0.05);
    overflow: hidden;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.tool-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    opacity: 0;
    z-index: -1;
    transition: opacity 0.3s ease;
}

.tool-card:hover::before {
    opacity: 0.05;
}

.tool-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
    transform-origin: left;
}

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

.tool-icon {
    width: 48px;
    height: 48px;
    background: var(--gray-50);
    border-radius: 12px;
    display: grid;
    place-items: center;
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

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

.tool-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--primary-light);
    color: var(--primary-dark);
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.tool-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 0.5rem;
}

.tool-description {
    color: var(--gray-600);
    font-size: 1rem;
    flex-grow: 1;
}

.tool-stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-600);
    font-size: 0.875rem;
}

.tool-stat svg {
    width: 1rem;
    height: 1rem;
    flex-shrink: 0;
}

/* Modern Responsive Design */
@media (max-width: 768px) {
    .container {
        margin-top: -2rem;
    }
    
    .tool-card {
        padding: 1.5rem;
    }
}

/* Modern Loading Animation */
@keyframes shimmer {
    0% { background-position: -1000px 0; }
    100% { background-position: 1000px 0; }
}

.tool-card.loading {
    animation: shimmer 2s infinite linear;
    background: linear-gradient(to right, #f6f7f8 0%, #edeef1 20%, #f6f7f8 40%, #f6f7f8 100%);
    background-size: 2000px 100%;
}