:root {
    --bg-color: #0b111f;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --accent: #1760ff;
    --accent-hover: #2563eb;
    --border: #334155;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 {
    font-size: 5rem;
    margin-bottom: 0.5rem;
}

#t-d {color: #ff8a05;} #t-a {color: #ffa845;} #t-r {color: #d49b56;} #t-k {color: #e0bb8f;}
#t-f {color: #f1f5f9;} #t-a2 {color: #cecece;} #t-s {color: #979797;} #t-t {color: #777777;}

.flex {
  display: flex;
  justify-content: center;
  flex-direction: column;
  max-width: 20rem;
  gap: 2rem;
  margin: auto;
}

.invert {
  filter: invert(1);
}

h2 {
  font-size: 3.5rem;
  color: #f1f5f9;
}

.subtle {
  color: var(--text-secondary)
}

.filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-btn {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    background-color: var(--border);
    color: var(--text-primary);
}

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

.back-btn {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    font-size: 1rem;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.2);
}

.card-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.card-content {
    padding: 1.5rem;
}

.card-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.card-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.card-tags {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.tag {
    background-color: rgba(59, 130, 246, 0.2);
    color: var(--accent);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.card-links {
    display: flex;
    gap: 1rem;
}

.link-btn {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1.2rem;
    transition: color 0.3s ease;
}

.link-btn:hover {
    color: var(--accent);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    header h1 {
        font-size: 2rem;
    }
}