/* --- Variables & Reset --- */
:root {

    --color-bg: #eff4f6;          
    --color-footer-bg: #e2e9ed;    
    
    --color-text-main: #222f3e;    
    --color-text-light: #576574;  
    
    /* Shifted Vector Accents (Cool & Vibrant) */
    --color-indigo: #341f97;       
    --color-orange: #ff9f43;      
    --color-blue: #00d2d3;         
    --color-yellow: #feca57;
    --color-tailwind: #38bdf8;       
    
    /* UI Tones */
    --card-bg: #ffffff;            /* Pure white - looks very sharp on cool blue */
    --shadow-soft: 0 12px 40px rgba(34, 47, 62, 0.05); /* Tinted with midnight blue */
    --shadow-hover: 0 25px 50px rgba(52, 31, 151, 0.15); /* Tinted with royal indigo */
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text-main);
    line-height: 1.6;
}

/* --- Header & Nav --- */
header {
    padding: 2rem 5%;
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.logo {
    font-weight: 600;
    color: var(--color-indigo);
    font-size: 1.5rem;
}

.nav-bar nav a {
    text-decoration: none;
    color: var(--color-text-light);
    margin-left: 1.5rem;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.nav-bar nav a:hover {
    color: var(--color-indigo);
}

/* --- Filter System --- */
.filter-container {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: transparent;
    border: 2px solid #eee;
    padding: 0.5rem 1.5rem;
    border-radius: 50px; /* Pill shape */
    cursor: pointer;
    font-family: inherit;
    font-weight: 500;
    color: var(--color-text-light);
    transition: all 0.3s ease;
}

.filter-btn:hover {
    border-color: var(--color-indigo);
    color: var(--color-indigo);
}

.filter-btn.active {
    background-color: var(--color-indigo);
    border-color: var(--color-indigo);
    color: white;
}

/* --- Grid System --- */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5% 4rem 5%;
    min-height: 60vh;
}

.grid-container {
    display: grid;
    /* Desktop default: 3 columns */
    grid-template-columns: repeat(3, 1fr); 
    gap: 2rem;
}

/* --- Card Design --- */
.card {
    background: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-5px); /* Vertical Lift */
    box-shadow: var(--shadow-hover);
}

/* Image Area */
.card-image-wrapper {
    width: 100%;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background-color: #f0f0f0; /* Placeholder color */
}

.card-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.card:hover .card-image-wrapper img {
    transform: scale(1.08); /* Inner Zoom */
}

/* Card Body */
.card-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

/* Tags */
.tags-container {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.tag {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Dynamic Tag Colors */
.tag.html { color: var(--color-orange); background: rgba(230, 81, 0, 0.1); }
.tag.css { color: var(--color-blue); background: rgba(2, 119, 189, 0.1); }
.tag.js { color: var(--color-yellow); background: rgba(249, 168, 37, 0.15); }
.tag.tailwind {color: var(--color-tailwind); background: rgba(56, 189, 248, 0.15);}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-text-main);
}

.card-desc {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
    flex-grow: 1; /* Pushes buttons to bottom */
}

/* Buttons */
.card-actions {
    display: flex;
    gap: 1rem;
    margin-top: auto;
}

.btn {
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.3s;
}

.btn-view { color: var(--color-indigo); }
.btn-view:hover { border-bottom-color: var(--color-indigo); }

.btn-code { color: var(--color-text-light); }
.btn-code:hover { color: var(--color-text-main); border-bottom-color: var(--color-text-main); }

/* --- Footer --- */
footer {
    text-align: center;
    padding: 5rem 0; 
    background-color: var(--color-footer-bg); 
    border-top: 1px solid rgba(0,0,0,0.05);  
    color: var(--color-text-light);
    font-size: 0.9rem;
    width: 100%;               
}

.footer-links {
    margin-top: 0.5rem;
}

.footer-links a {
    color: var(--color-indigo);
    text-decoration: none;
    margin: 0 0.5rem;
}

.hidden { display: none; }

/* --- Responsive Media Queries --- */

/* Tablet (Max 900px) */
@media (max-width: 900px) {
    .grid-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile (Max 600px) */
@media (max-width: 600px) {
    .grid-container {
        grid-template-columns: 1fr;
    }

    .nav-bar {
        flex-direction: column;
        gap: 1rem;
    }

    .filter-container {
        gap: 0.5rem;
    }
}