/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem 0 4rem;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.hero p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

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

.search-input {
    width: 100%;
    padding: 1rem 3.5rem 1rem 1.5rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

.search-input:focus {
    outline: none;
}

.search-btn {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background: #667eea;
    border: none;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.3s;
}

.search-btn:hover {
    background: #5568d3;
}

.quick-links {
    margin-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.quick-link {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(255,255,255,0.2);
    color: white;
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: background 0.3s;
}

.quick-link:hover {
    background: rgba(255,255,255,0.3);
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #333;
}

/* Content Section */
.content {
    padding: 4rem 0;
}

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

.content-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.content-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.content-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.content-card-body {
    padding: 1.5rem;
}

.content-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.content-card p {
    color: #666;
    margin-bottom: 1rem;
}

.content-card a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

.content-card a:hover {
    text-decoration: underline;
}

/* Tools Categories Section */
.tools-categories {
    padding: 4rem 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.category-card {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.category-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    display: block;
    position: relative;
}

.category-icon .iconfont {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 90px;
    height: 90px;
    border-radius: 22px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white !important;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.35), inset 0 1px 0 rgba(255,255,255,0.2);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: visible;
    font-size: 2.5rem;
}

.category-icon .iconfont::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    right: 2px;
    bottom: 2px;
    border-radius: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    opacity: 0;
    transition: opacity 0.4s;
    pointer-events: none;
}

.category-card:hover .category-icon .iconfont::after {
    opacity: 1;
}

.category-card:hover .category-icon .iconfont {
    transform: translateY(-8px) scale(1.15) rotate(5deg);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.5), inset 0 1px 0 rgba(255,255,255,0.3);
}

/* Different colors for different categories */
.category-card:nth-child(1) .category-icon .iconfont {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.35), inset 0 1px 0 rgba(255,255,255,0.2);
}
.category-card:nth-child(2) .category-icon .iconfont {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    box-shadow: 0 6px 20px rgba(245, 87, 108, 0.35), inset 0 1px 0 rgba(255,255,255,0.2);
}
.category-card:nth-child(3) .category-icon .iconfont {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    box-shadow: 0 6px 20px rgba(79, 172, 254, 0.35), inset 0 1px 0 rgba(255,255,255,0.2);
}
.category-card:nth-child(4) .category-icon .iconfont {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    box-shadow: 0 6px 20px rgba(67, 233, 123, 0.35), inset 0 1px 0 rgba(255,255,255,0.2);
}
.category-card:nth-child(5) .category-icon .iconfont {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    box-shadow: 0 6px 20px rgba(250, 112, 154, 0.35), inset 0 1px 0 rgba(255,255,255,0.2);
}
.category-card:nth-child(6) .category-icon .iconfont {
    background: linear-gradient(135deg, #30cfd0 0%, #330867 100%);
    box-shadow: 0 6px 20px rgba(48, 207, 208, 0.35), inset 0 1px 0 rgba(255,255,255,0.2);
}
.category-card:nth-child(7) .category-icon .iconfont {
    background: linear-gradient(135deg, #ff6b6b 0%, #feca57 100%);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.35), inset 0 1px 0 rgba(255,255,255,0.2);
}

.category-card:nth-child(1):hover .category-icon .iconfont {
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.5), inset 0 1px 0 rgba(255,255,255,0.3);
}
.category-card:nth-child(2):hover .category-icon .iconfont {
    box-shadow: 0 12px 35px rgba(245, 87, 108, 0.5), inset 0 1px 0 rgba(255,255,255,0.3);
}
.category-card:nth-child(3):hover .category-icon .iconfont {
    box-shadow: 0 12px 35px rgba(79, 172, 254, 0.5), inset 0 1px 0 rgba(255,255,255,0.3);
}
.category-card:nth-child(4):hover .category-icon .iconfont {
    box-shadow: 0 12px 35px rgba(67, 233, 123, 0.5), inset 0 1px 0 rgba(255,255,255,0.3);
}
.category-card:nth-child(5):hover .category-icon .iconfont {
    box-shadow: 0 12px 35px rgba(250, 112, 154, 0.5), inset 0 1px 0 rgba(255,255,255,0.3);
}
.category-card:nth-child(6):hover .category-icon .iconfont {
    box-shadow: 0 12px 35px rgba(48, 207, 208, 0.5), inset 0 1px 0 rgba(255,255,255,0.3);
}
.category-card:nth-child(7):hover .category-icon .iconfont {
    box-shadow: 0 12px 35px rgba(255, 107, 107, 0.5), inset 0 1px 0 rgba(255,255,255,0.3);
}

.iconfont {
    display: inline-block;
    margin-right: 0.5rem;
}

.tool-item h4 .iconfont {
    font-size: inherit;
    width: 50px;
    height: 50px;
    border-radius: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white !important;
    margin-right: 0.75rem;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: visible;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.tool-item h4 .iconfont::after {
    content: '';
    position: absolute;
    top: 1px;
    left: 1px;
    right: 1px;
    bottom: 1px;
    border-radius: 13px;
    border: 2px solid rgba(255,255,255,0.3);
    opacity: 0;
    transition: opacity 0.4s;
    pointer-events: none;
}

.tool-item:hover h4 .iconfont::after {
    opacity: 1;
}

.tool-item:hover h4 .iconfont {
    transform: rotate(8deg) scale(1.2);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.5), inset 0 1px 0 rgba(255,255,255,0.3);
}

/* Different gradient colors for different tools */
.tool-item:nth-child(1) h4 i { 
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}
.tool-item:nth-child(2) h4 i { 
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    box-shadow: 0 4px 12px rgba(245, 87, 108, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}
.tool-item:nth-child(3) h4 i { 
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    box-shadow: 0 4px 12px rgba(79, 172, 254, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}
.tool-item:nth-child(4) h4 i { 
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    box-shadow: 0 4px 12px rgba(67, 233, 123, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}
.tool-item:nth-child(5) h4 i { 
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    box-shadow: 0 4px 12px rgba(250, 112, 154, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}
.tool-item:nth-child(6) h4 i { 
    background: linear-gradient(135deg, #30cfd0 0%, #330867 100%);
    box-shadow: 0 4px 12px rgba(48, 207, 208, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}
.tool-item:nth-child(7) h4 i { 
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
    box-shadow: 0 4px 12px rgba(168, 237, 234, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}
.tool-item:nth-child(8) h4 i { 
    background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
    box-shadow: 0 4px 12px rgba(255, 154, 158, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}
.tool-item:nth-child(9) h4 i { 
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    box-shadow: 0 4px 12px rgba(252, 182, 159, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}
.tool-item:nth-child(10) h4 i { 
    background: linear-gradient(135deg, #ff8a80 0%, #ea6100 100%);
    box-shadow: 0 4px 12px rgba(255, 138, 128, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}
.tool-item:nth-child(11) h4 i { 
    background: linear-gradient(135deg, #84fab0 0%, #8fd3f4 100%);
    box-shadow: 0 4px 12px rgba(132, 250, 176, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}
.tool-item:nth-child(12) h4 i { 
    background: linear-gradient(135deg, #ff6b6b 0%, #feca57 100%);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}
.tool-item:nth-child(13) h4 i { 
    background: linear-gradient(135deg, #a8c0ff 0%, #3f2b96 100%);
    box-shadow: 0 4px 12px rgba(168, 192, 255, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}
.tool-item:nth-child(14) h4 i { 
    background: linear-gradient(135deg, #fad961 0%, #f76b1c 100%);
    box-shadow: 0 4px 12px rgba(250, 217, 97, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}

.tool-item:nth-child(1):hover h4 i { box-shadow: 0 8px 20px rgba(102, 126, 234, 0.5), inset 0 1px 0 rgba(255,255,255,0.3); }
.tool-item:nth-child(2):hover h4 i { box-shadow: 0 8px 20px rgba(245, 87, 108, 0.5), inset 0 1px 0 rgba(255,255,255,0.3); }
.tool-item:nth-child(3):hover h4 i { box-shadow: 0 8px 20px rgba(79, 172, 254, 0.5), inset 0 1px 0 rgba(255,255,255,0.3); }
.tool-item:nth-child(4):hover h4 i { box-shadow: 0 8px 20px rgba(67, 233, 123, 0.5), inset 0 1px 0 rgba(255,255,255,0.3); }
.tool-item:nth-child(5):hover h4 i { box-shadow: 0 8px 20px rgba(250, 112, 154, 0.5), inset 0 1px 0 rgba(255,255,255,0.3); }
.tool-item:nth-child(6):hover h4 i { box-shadow: 0 8px 20px rgba(48, 207, 208, 0.5), inset 0 1px 0 rgba(255,255,255,0.3); }
.tool-item:nth-child(7):hover h4 i { box-shadow: 0 8px 20px rgba(168, 237, 234, 0.5), inset 0 1px 0 rgba(255,255,255,0.3); }
.tool-item:nth-child(8):hover h4 i { box-shadow: 0 8px 20px rgba(255, 154, 158, 0.5), inset 0 1px 0 rgba(255,255,255,0.3); }
.tool-item:nth-child(9):hover h4 i { box-shadow: 0 8px 20px rgba(252, 182, 159, 0.5), inset 0 1px 0 rgba(255,255,255,0.3); }
.tool-item:nth-child(10):hover h4 i { box-shadow: 0 8px 20px rgba(255, 138, 128, 0.5), inset 0 1px 0 rgba(255,255,255,0.3); }
.tool-item:nth-child(11):hover h4 i { box-shadow: 0 8px 20px rgba(132, 250, 176, 0.5), inset 0 1px 0 rgba(255,255,255,0.3); }
.tool-item:nth-child(12):hover h4 i { box-shadow: 0 8px 20px rgba(255, 107, 107, 0.5), inset 0 1px 0 rgba(255,255,255,0.3); }
.tool-item:nth-child(13):hover h4 i { box-shadow: 0 8px 20px rgba(168, 192, 255, 0.5), inset 0 1px 0 rgba(255,255,255,0.3); }
.tool-item:nth-child(14):hover h4 i { box-shadow: 0 8px 20px rgba(250, 217, 97, 0.5), inset 0 1px 0 rgba(255,255,255,0.3); }

.category-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #667eea;
}

.category-card p {
    color: #666;
    margin-bottom: 1.5rem;
}

.category-count {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: #667eea;
    color: white;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.popular-tools {
    padding: 4rem 0;
    background: white;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.tool-item {
    background: #f9f9f9;
    padding: 1.5rem;
    border-radius: 10px;
    border: 2px solid transparent;
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    display: block;
}

.tool-item:hover {
    border-color: #667eea;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.2);
}

.tool-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.tool-item p {
    font-size: 0.9rem;
    color: #666;
    margin: 0;
}

.view-all {
    text-align: center;
    margin-top: 2rem;
}

.view-all a {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: #667eea;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s;
}

.view-all a:hover {
    background: #5568d3;
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .hero {
        padding: 2rem 0 3rem;
    }
    
    .hero h1 {
        font-size: 1.75rem;
    }
    
    .hero p {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
    }
    
    .search-box {
        padding: 0 1rem;
    }
    
    .search-input {
        padding: 0.875rem 3rem 0.875rem 1.25rem;
        font-size: 0.95rem;
    }
    
    .search-btn {
        padding: 0.65rem 1.25rem;
        font-size: 0.9rem;
    }
    
    .quick-links {
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
        margin-top: 1rem;
    }
    
    .quick-link {
        font-size: 0.85rem;
        padding: 0.4rem 0.875rem;
    }
    
    .section-title {
        font-size: 1.75rem;
        margin-bottom: 1.5rem;
    }
    
    .content {
        padding: 3rem 0;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .content-card-body {
        padding: 1.25rem;
    }
    
    .content-card h3 {
        font-size: 1.1rem;
    }
    
    .tools-categories {
        padding: 3rem 0;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .category-card {
        padding: 2rem;
    }
    
    .category-icon {
        font-size: 3rem;
        margin-bottom: 1.25rem;
    }
    
    .category-icon .iconfont {
        width: 75px;
        height: 75px;
        font-size: 2rem;
    }
    
    .category-card h3 {
        font-size: 1.25rem;
    }
    
    .category-card p {
        font-size: 0.9rem;
    }
    
    .popular-tools {
        padding: 3rem 0;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }
    
    .tool-item {
        padding: 1.25rem;
    }
    
    .tool-item h4 {
        font-size: 1rem;
    }
    
    .tool-item h4 .iconfont {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
        margin-right: 0.625rem;
    }
    
    .tool-item p {
        font-size: 0.85rem;
    }
    
    .view-all {
        margin-top: 1.5rem;
    }
    
    .view-all a {
        padding: 0.65rem 1.5rem;
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 1.5rem 0 2rem;
    }
    
    .hero h1 {
        font-size: 1.5rem;
    }
    
    .hero p {
        font-size: 0.9rem;
        margin-bottom: 1.25rem;
    }
    
    .search-input {
        padding: 0.75rem 2.75rem 0.75rem 1rem;
        font-size: 0.9rem;
    }
    
    .search-btn {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
        right: 3px;
    }
    
    .quick-link {
        font-size: 0.8rem;
        padding: 0.35rem 0.75rem;
    }
    
    .section-title {
        font-size: 1.5rem;
        margin-bottom: 1.25rem;
    }
    
    .content {
        padding: 2rem 0;
    }
    
    .content-card-body {
        padding: 1rem;
    }
    
    .content-card h3 {
        font-size: 1rem;
    }
    
    .content-card p {
        font-size: 0.9rem;
    }
    
    .tools-categories {
        padding: 2rem 0;
    }
    
    .category-card {
        padding: 1.5rem;
    }
    
    .category-icon {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }
    
    .category-icon .iconfont {
        width: 65px;
        height: 65px;
        font-size: 1.75rem;
    }
    
    .category-card h3 {
        font-size: 1.1rem;
    }
    
    .category-card p {
        font-size: 0.85rem;
        margin-bottom: 1.25rem;
    }
    
    .category-count {
        font-size: 0.85rem;
        padding: 0.4rem 0.875rem;
    }
    
    .popular-tools {
        padding: 2rem 0;
    }
    
    .tool-item {
        padding: 1rem;
    }
    
    .tool-item h4 {
        font-size: 0.95rem;
    }
    
    .tool-item h4 .iconfont {
        width: 40px;
        height: 40px;
        font-size: 1rem;
        margin-right: 0.5rem;
    }
    
    .tool-item p {
        font-size: 0.8rem;
    }
    
    .view-all a {
        padding: 0.6rem 1.25rem;
        font-size: 0.9rem;
    }
}