:root {
    --primary-color: #1a73e8;
    --text-main: #202124;
    --text-secondary: #5f6368;
    --bg-page: #ffffff;
    --bg-header: #ffffff;
    --border-color: #dadce0;
    --card-radius: 24px;
    --hover-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background-color: var(--bg-header);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    font-size: 1.1rem;
}

.logo-icon {
    font-size: 1.5rem;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background-color: #e8f0fe;
    color: var(--primary-color);
    padding: 10px 20px;
    border-radius: 100px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

.download-btn:hover {
    background-color: #d2e3fc;
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 24px;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 40px;
    color: var(--text-main);
}

/* Filters */
.filters-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.filter-label {
    font-weight: 700;
    color: var(--text-main);
    font-size: 1rem;
}

.filters {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 18px;
    border-radius: 100px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.25, 0.8, 0.25, 1);
    outline: none;
}

.filter-btn:hover {
    border-color: var(--text-main);
    color: var(--text-main);
    background-color: transparent;
    box-shadow: 0 0 0 1px var(--text-main); /* Creates the thick border effect without layout jitter */
}

.filter-btn.active {
    background-color: #e8f0fe;
    color: var(--primary-color);
    border-color: #e8f0fe;
    box-shadow: none;
}

.filter-btn.active:hover {
    box-shadow: none;
    background-color: #d2e3fc; /* Optional: slightly darker blue on active hover */
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    text-align: left;
}

/* Card */
.card {
    background: #fff;
    border-radius: var(--card-radius);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid transparent;
    display: flex;
    flex-direction: column;
    height: 100%;
}

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

.card-image {
    height: 240px;
    border-radius: var(--card-radius) var(--card-radius) 0 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
    padding: 20px;
}

/* Chrome-like subtle image backgrounds */
.bg-light-blue { background-color: #d1e1f9; }
.bg-light-gray { background-color: #f1f3f4; }
.bg-pale-purple { background-color: #e8dff5; }
.bg-pale-green { background-color: #ceead6; }
.bg-pale-orange { background-color: #fce8e6; }
.bg-pale-pink { background-color: #fce8e6; } /* You can adjust these colors to match aesthetics */

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12); /* Inner floating look */
    transition: transform 0.5s ease;
}

.card:hover .card-image img {
    transform: scale(1.03);
}

.placeholder-art {
    font-size: 5rem;
    opacity: 0.8;
}

.card-content {
    padding: 32px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    background: #fff;
}

.card-category {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.card-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.3;
    margin-bottom: 24px;
    flex-grow: 1;
}

.card-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition);
    align-self: flex-start;
}

.card-link:hover {
    color: #174ea6;
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 1024px) {
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .hero-title {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .cards-grid {
        grid-template-columns: 1fr;
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .filters-container {
        flex-direction: column;
        align-items: flex-start;
    }
    .filters {
        justify-content: flex-start;
    }
    .main-content {
        padding: 40px 20px;
    }
}