/* 1. Import Pico.css */
@import url("https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.min.css");

/* 2. Global Theme Variables */
:root {
    /* Pico v2.x requires these specific background/border variables to colorize buttons */
    --pico-primary-background: #d81b60;
    --pico-primary-border: #d81b60;
    --pico-primary-hover-background: #ad144d;
    --pico-primary-hover-border: #ad144d;
    --pico-primary-focus: rgba(216, 27, 96, 0.2);

    --pico-font-family-sans-serif: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* 3. Light / Dark Mode Handling */
[data-theme="light"] {
    --pico-background-color: #ffffff;
    --floral-shadow: rgba(216, 27, 96, 0.15);
}

[data-theme="dark"] {
    --pico-background-color: #13171f;
    --floral-shadow: rgba(216, 27, 96, 0.4);
}

/* 4. Navbar */
nav.brand-nav {
    border-bottom: 1px solid var(--pico-muted-border-color) !important;
    padding: 0.5rem 0;
    margin-bottom: 1rem;
}

nav.brand-nav img.logo {
    height: 60px;
    width: auto;
    margin-right: 1rem;
    vertical-align: middle;
}

/* 5. Modern Flat Cards */
.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

article.resource-card {
    margin: 0;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    border: 1px solid var(--pico-muted-border-color);
    overflow: hidden;
}

article.resource-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px var(--floral-shadow);
    border-color: var(--pico-primary-border);
}

article.resource-card header {
    padding: 0;
    border-bottom: none;
}

article.resource-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-bottom: 1px solid var(--pico-muted-border-color);
}

/* 6. Vibrant Spectrum Badges */
.badges-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 0.8rem;
}

.level-badge, .subtype-badge {
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
    color: white;
    border: none;
}

/* CEFR Spectrum: Smooth transition from cool green to warm red */
.level-badge[data-level="A1"] { background-color: #4caf50; } /* Green */
.level-badge[data-level="A2"] { background-color: #8bc34a; } /* Light Green */
.level-badge[data-level="B1"] { background-color: #ff9800; } /* Orange */
.level-badge[data-level="B2"] { background-color: #f44336; } /* Red */
.level-badge[data-level="C1"] { background-color: #9c27b0; } /* Purple */
.level-badge[data-level="C2"] { background-color: #3f51b5; } /* Indigo */

/* Subtype Spectrum */
.subtype-badge[data-type="category"] { background-color: #00bcd4; } /* Cyan */
.subtype-badge[data-type="activity"] {
    background-color: #ffc107; /* Amber */
    color: #333; /* Dark text for contrast */
}

/* 7. Button Variety */
article.resource-card footer {
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: transparent;
    border-top: none;
    padding-top: 1rem;
}

/* Breaks the uniform color by making the PDF button a distinct Deep Purple */
.btn-download {
    background-color: #673ab7 !important;
    border-color: #673ab7 !important;
    color: white !important;
}
.btn-download:hover {
    background-color: #512da8 !important;
    border-color: #512da8 !important;
}