/* === styles/home.css (ULTRA-STYLISH VERSION) === */

/* --- 1. Global Styles & Custom Properties --- */
:root {
    --purple-glow: #a259ff;
    --cyan-glow: #00f0ff;
    --deep-space: #0b021d;
    --nebula-start: #240046;
    --nebula-end: #10002b;
    
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --surface-bg: rgba(18, 5, 41, 0.5);
    --border-color: rgba(162, 89, 255, 0.3);
    
    --font-family: 'Poppins', 'Segoe UI', sans-serif;
}

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700;800&display=swap');

body {
    background-color: var(--deep-space);
    background-image: 
        radial-gradient(ellipse at 50% 0%, var(--nebula-start) 0%, transparent 60%),
        radial-gradient(ellipse at 10% 100%, var(--nebula-end) 0%, transparent 50%),
        radial-gradient(ellipse at 90% 90%, var(--nebula-end) 0%, transparent 50%);
    color: var(--text-primary);
    font-family: var(--font-family);
    margin: 0;
}

/* --- 2. Header --- */
.site-header {
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11, 2, 29, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}
.logo-title { display: flex; align-items: center; gap: 0.75rem; }
.logo { width: 40px; height: 40px; }
.title { font-size: 1.5rem; font-weight: 700; }
.user-auth a { text-decoration: none; }
.login-btn {
    padding: 0.5rem 1rem;
    background: transparent;
    border: 2px solid var(--purple-glow);
    color: var(--purple-glow);
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s;
}
.login-btn:hover { background: var(--purple-glow); color: white; }
.user-avatar-link img {
    width: 40px; height: 40px;
    border-radius: 50%;
    border: 2px solid var(--purple-glow);
    object-fit: cover;
    transition: all 0.3s;
}
.user-avatar-link:hover img { transform: scale(1.1); box-shadow: 0 0 15px var(--purple-glow); }

/* --- 3. Hero Section --- */
.hero-section {
    text-align: center;
    padding: 6rem 1rem;
    position: relative;
    overflow: hidden;
}
.hero-section::before { /* Animated grid background */
    content: '';
    position: absolute;
    inset: 0;
    background-image: linear-gradient(var(--border-color) 1px, transparent 1px), linear-gradient(to right, var(--border-color) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse at center, white 0%, transparent 70%);
    animation: pan-grid 30s linear infinite;
}
@keyframes pan-grid { from { background-position: 0 0; } to { background-position: -400px -400px; } }
.hero-content { position: relative; z-index: 1; }
.hero-content h1 {
    font-size: clamp(2.5rem, 5vw, 4rem); /* Responsive font size */
    font-weight: 800;
    margin: 0 0 1rem 0;
    background: linear-gradient(90deg, var(--cyan-glow), var(--purple-glow), var(--cyan-glow));
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradient-flow 5s linear infinite;
}
.hero-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* --- 4. Filter & Projects Section --- */
.filter-section, .projects-section { padding: 2rem 5%; }
.projects-section h2 {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1rem;
}
.filter-bar {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.filter-btn, .clear-btn {
    padding: 0.5rem 1.2rem;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}
.filter-btn:hover { color: white; border-color: var(--purple-glow); }
.filter-btn.active { color: var(--deep-space); background: var(--cyan-glow); border-color: var(--cyan-glow); }
.clear-btn { border-color: #c1121f; color: #c1121f; }
.clear-btn:hover { background: #c1121f; color: white; }

/* --- 5. Project Grid & Cards --- */
.project-grid {
    display: grid;
    /* Responsive grid: fit as many cards as possible with a min-width */
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}
.project-card {
    background: var(--surface-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all 0.4s ease;
    animation: popIn 0.5s ease-out forwards;
    opacity: 0;
    transform: translateY(20px);
}
.project-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.7);
    border-color: var(--purple-glow);
}
.card-image-container { overflow: hidden; }
.project-img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.project-card:hover .project-img { transform: scale(1.05); }
.card-content {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1; /* Makes footer stick to the bottom */
}
.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}
.card-footer strong { color: var(--text-primary); font-size: 1.1rem; }

.download-btn {
    /* --- NEW STYLES HERE --- */
    position: relative; /* Essential for the ::before pseudo-element */
    overflow: hidden;   /* Keeps the animated fill inside the button's bounds */
    z-index: 1;         /* Ensures text stays on top of the animation */

    margin-top: auto;
    text-align: center;
    padding: 0.75rem;
    background: transparent;
    border: 2px solid var(--cyan-glow);
    color: var(--cyan-glow);
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.4s ease; /* Longer transition for a smoother effect */
}

/* We don't need a separate hover rule anymore, but we'll create one for the text color change */
.download-btn:hover {
    color: var(--deep-space); /* Change text color on hover */
    box-shadow: 0 0 15px var(--cyan-glow); /* Add a subtle glow */
}

/* --- ADD THIS NEW ::before PSEUDO-ELEMENT --- */
.download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--cyan-glow);
    transform: translateX(-101%); /* Start completely off-screen to the left */
    transition: transform 0.4s ease-in-out;
    z-index: -1; /* Place the fill effect BEHIND the button text */
}

/* --- ADD THIS NEW HOVER STATE FOR THE PSEUDO-ELEMENT --- */
.download-btn:hover::before {
    transform: translateX(0); /* Slide the fill effect into view on hover */
}

/* --- 6. Footer --- */
.site-footer {
    text-align: center;
    padding: 2rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* --- Animations --- */
@keyframes gradient-flow { from { background-position: 0% 50%; } to { background-position: 200% 50%; } }
@keyframes popIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }