/* Modern AI Blue Theme - Smart Tools Website */
:root {
    --primary: #0056b3;
    --primary-light: #007bff;
    --primary-dark: #004494;
    --accent: #00c2ff;
    --light: #f0f8ff;
    --dark: #102a43;
    --gray: #627d98;
    --light-gray: #e9ecef;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    --shadow: 0 4px 15px rgba(0, 86, 179, 0.15);
    --border-radius: 10px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Prompt', 'Kanit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

body {
    background-color: #f5f9ff;
    color: var(--dark);
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
header {
    background: var(--gradient);
    padding: 50px 0 30px;
    color: var(--white);
    text-align: center;
    border-radius: 0 0 20px 20px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 60%);
    z-index: 1;
    animation: shine 15s infinite linear;
}

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

header h1 {
    font-size: 2.8rem;
    margin-bottom: 10px;
    position: relative;
    z-index: 2;
    letter-spacing: 1px;
    font-weight: 700;
}

header p {
    font-size: 1.3rem;
    opacity: 0.9;
    position: relative;
    z-index: 2;
}

/* Intro Section */
.intro {
    padding: 20px 0;
    text-align: center;
    margin-bottom: 30px;
}

/* Features Section */
.features {
    padding: 20px 0 60px;
}

.tool-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.tool-item {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
    min-height: 150px;
}

/* เอาเส้นกั้นด้านข้างออก */
.tool-item::before {
    display: none;
}

.tool-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 86, 179, 0.2);
}

.tool-item h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--primary-dark);
    font-weight: 500;
}

.button {
    display: inline-block;
    background: var(--gradient);
    color: var(--white);
    padding: 8px 25px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0, 123, 255, 0.2);
}

.button:hover {
    box-shadow: 0 6px 15px rgba(0, 123, 255, 0.3);
    transform: translateY(-2px);
}

/* Footer Styles */
footer {
    background: var(--dark);
    padding: 40px 0;
    color: var(--white);
    text-align: center;
    border-radius: 20px 20px 0 0;
    margin-top: 30px;
}

footer p {
    margin-bottom: 15px;
    font-size: 1rem;
}

footer a {
    color: var(--light) !important;
    transition: var(--transition);
}

footer a:hover {
    color: var(--accent) !important;
}

footer i {
    margin-right: 8px;
    font-size: 1.2rem;
    vertical-align: middle;
}

/* Animation for tool items */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.tool-item {
    animation: fadeIn 0.6s ease-out backwards;
}

.tool-item:nth-child(3n+1) { animation-delay: 0.1s; }
.tool-item:nth-child(3n+2) { animation-delay: 0.2s; }
.tool-item:nth-child(3n+3) { animation-delay: 0.3s; }

/* Category navigation */
.categories {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
}

.category-btn {
    background-color: var(--light-gray);
    color: var(--dark);
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.category-btn:hover, .category-btn.active {
    background-color: var(--primary);
    color: var(--white);
}

/* Search bar */
.search-container {
    margin: 20px auto 30px;
    max-width: 600px;
    position: relative;
}

.search-bar {
    width: 100%;
    padding: 12px 20px;
    padding-left: 45px;
    border-radius: 30px;
    border: 2px solid var(--light-gray);
    background-color: var(--white);
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
}

.search-bar:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 4px rgba(0, 123, 255, 0.1);
}

.search-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
    font-size: 1.2rem;
}

/* Responsive styles */
@media (max-width: 992px) {
    header h1 {
        font-size: 2.4rem;
    }
    
    header p {
        font-size: 1.1rem;
    }
    
    .tool-list {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    header {
        padding: 40px 0 25px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .tool-list {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        gap: 15px;
    }
    
    .tool-item {
        padding: 15px;
        min-height: 130px;
    }
    
    .tool-item h3 {
        font-size: 1.1rem;
        margin-bottom: 15px;
    }
    
    .button {
        padding: 7px 20px;
        font-size: 0.9rem;
    }
    
    .category-btn {
        font-size: 0.8rem;
        padding: 6px 12px;
    }
}

@media (max-width: 576px) {
    header {
        padding: 30px 0 20px;
        border-radius: 0 0 15px 15px;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    header p {
        font-size: 1rem;
    }
    
    .tool-list {
        grid-template-columns: 1fr;
    }
    
    .tool-item {
        min-height: auto;
    }
    
    .categories {
        gap: 8px;
    }
    
    .category-btn {
        padding: 5px 10px;
        font-size: 0.75rem;
    }
    
    footer {
        padding: 30px 0;
        border-radius: 15px 15px 0 0;
    }
}

/* Add custom Thai font */
@import url('https://fonts.googleapis.com/css2?family=Prompt:wght@300;400;500;700&family=Kanit:wght@300;400;500;700&display=swap');