:root{
  --bg: #0d0d10;
  --card-bg: rgba(255,255,255,0.03);
  --text-main: #eaeaea;
  --text-muted: #a1a1aa;
  --accent: #7aa2f7;
  --accent-glow: rgba(122, 162, 247, 0.15);
  --accent2: #8b5cf6;
  --border: rgba(255,255,255,0.08);
  --glass: rgba(13, 13, 16, 0.7);
  --shadow: 0 10px 30px -10px rgba(0,0,0,0.5);
  --radius: 16px;
  --header-height: 80px;
}

[data-theme="light"]{
  --bg: #ffffff;
  --card-bg: #f4f4f5;
  --text-main: #18181b;
  --text-muted: #52525b;
  --glass: rgba(255, 255, 255, 0.8);
  --border: rgba(0,0,0,0.06);
  --shadow: 0 10px 30px -10px rgba(0,0,0,0.1);
  --accent-glow: rgba(122, 162, 247, 0.1);
}

html { scroll-behavior: smooth; }

body{
  font-family: 'Inter', sans-serif;
  background-color: var(--bg);
  color: var(--text-main);
  margin: 0;
  padding: 0;
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
  -webkit-font-smoothing: antialiased;
}

.container{
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  box-sizing: border-box;
}

header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}
header.scrolled {
    border-bottom-color: var(--border);
}

.logo{
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
  text-decoration: none;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 4px;
}
.logo span { color: var(--accent); }

.theme-toggle{
  background: transparent;
  border: 1px solid var(--border);
  padding: 8px;
  border-radius: 50%;
  cursor: pointer;
  color: var(--text-main);
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
}
.theme-toggle:hover{
  background: var(--border);
  color: var(--accent);
  transform: rotate(15deg);
}
.theme-toggle svg{ width: 20px; height: 20px; fill: currentColor; }

.hero{
  text-align: center;
  padding: 100px 0 80px;
  position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    opacity: 0.5;
    z-index: -1;
    pointer-events: none;
}

.hero h1{
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  margin: 0 0 24px 0;
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.hero p{
  font-size: clamp(1.1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto 40px;
  text-wrap: balance;
}

.social-links { display: flex; gap: 16px; justify-content: center; }
.social-links a{
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text-main);
  transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.social-links a:hover{
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 8px 20px -4px var(--accent-glow);
}
.social-links svg{ width: 24px; height: 24px; fill: currentColor; }

.filter-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 40px;
    padding-bottom: 20px;
}
.filter-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: 50px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
}
.filter-btn:hover {
    background: var(--card-bg);
    color: var(--text-main);
}
.filter-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.section-title{
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: var(--text-main);
  text-align: center;
}

.project-grid{
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 32px;
  margin-bottom: 100px;
}

.project-card{
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  cursor: pointer;
  opacity: 0; 
  transform: translateY(20px);
}
.project-card.visible {
    opacity: 1;
    transform: translateY(0);
}
.project-card.hidden {
    display: none;
}

.project-card:hover{
  transform: translateY(-8px);
  border-color: var(--accent);
  box-shadow: var(--shadow);
}
.project-card:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}

.image-wrapper {
    width: 100%;
    height: 220px;
    overflow: hidden;
    background-color: var(--bg);
    position: relative;
}
.project-card img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
  opacity: 0.9;
}
.project-card:hover img{
  transform: scale(1.08);
  opacity: 1;
}

.project-info{
  padding: 24px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}
.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}
.project-info h3{
  font-size: 1.25rem;
  margin: 0;
  color: var(--text-main);
  font-weight: 700;
}

.status-badge {
    font-size: 0.7rem;
    background: rgba(139, 92, 246, 0.15); 
    color: var(--accent2);
    border: 1px solid rgba(139, 92, 246, 0.3);
    padding: 4px 8px;
    border-radius: 6px;
    text-transform: uppercase;
    font-weight: 700;
    margin-left: 8px;
    letter-spacing: 0.05em;
}

.project-info p{
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 0.95rem;
  flex-grow: 1;
}
.tags{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}
.tag{
  background: transparent;
  color: var(--accent);
  border: 1px solid rgba(122, 162, 247, 0.2);
  padding: 4px 10px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
}

footer{
  border-top: 1px solid var(--border);
  padding: 60px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.lightbox{
  position: fixed;
  inset: 0;
  background: rgba(5, 5, 8, 0.96);
  backdrop-filter: blur(10px);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  display: flex;
  justify-content: center;
  align-items: center;
}
.lightbox.active{ opacity: 1; visibility: visible; }

.lightbox-content{
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 20px;
    box-sizing: border-box;
}

.lb-image-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 0;
}

.lb-loader {
    position: absolute;
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255,255,255,0.1);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    z-index: -1;
}
@keyframes spin { to { transform: rotate(360deg); } }

.lb-image-wrapper img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
    opacity: 0;
    transform: scale(0.96);
    transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.lb-image-wrapper img.loaded { opacity: 1; transform: scale(1); }

.lb-ui {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
}

.lb-controls {
    pointer-events: auto;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.1);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 10;
}
.lb-controls:hover:not(:disabled) {
    background: var(--accent);
    transform: translateY(-50%) scale(1.1);
}
.lb-controls:disabled { opacity: 0; pointer-events: none; }

#lb-prev { left: 24px; }
#lb-next { right: 24px; }
#lb-close { 
    top: 24px; 
    right: 24px; 
    transform: none; 
    background: transparent;
    border: none;
}
#lb-close:hover { background: rgba(255,255,255,0.1); transform: rotate(90deg); }

.lb-details {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(10, 10, 12, 0.85);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 16px 24px;
    border-radius: 12px;
    backdrop-filter: blur(12px);
    text-align: center;
    max-width: 600px;
    width: 90%;
    pointer-events: auto;
}
.lb-details h3 { margin: 0 0 4px 0; color: var(--accent); font-size: 1.1rem; }
.lb-details p { margin: 0; color: #ccc; font-size: 0.9rem; }

@media (max-width: 768px) {
    .hero { padding-top: 60px; }
    .project-grid { grid-template-columns: 1fr; }
    .lb-details { bottom: 20px; padding: 12px; }
    .lb-controls { width: 40px; height: 40px; }
    #lb-prev { left: 10px; }
    #lb-next { right: 10px; }
    #lb-close { top: 10px; right: 10px; }
}