:root { --html: #e34c26; --css: #663399; --js: #ffd343; }
[data-theme="light"] {
  --bg: #fafafa; --bg2: #f0f0f2; --surface: #ffffff;
  --text: #212129; --text-muted: #666677; --border: rgba(33,33,41,0.12);
}
[data-theme="dark"] {
  --bg: #212129; --bg2: #18181f; --surface: #2c2c38;
  --text: #fafafa; --text-muted: #aaaacc; --border: rgba(250,250,250,0.10);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: Helvetica, Arial, sans-serif;
  background: var(--bg); color: var(--text);
  transition: background 0.3s, color 0.3s; overflow-x: hidden; min-height: 100vh;
}
body::before {
  content: ''; position: fixed; inset: 0; pointer-events: none; z-index: 0; opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-size: 180px;
}

/* NAV — mobile-first */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.85rem 1.1rem;
  background: var(--bg); border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px); transition: background 0.3s;
}
@media (min-width: 700px) { nav { padding: 1rem 2.5rem; } }

.nav-logo {
  font-family: 'Montserrat', sans-serif; font-weight: 900;
  font-size: 1.1rem; letter-spacing: 0.08em;
  color: var(--text); text-decoration: none;
  display: flex; align-items: center; gap: 0.45rem;
}
.nav-logo img { height: 30px; width: 30px; border-radius: 50%; object-fit: contain; }
.nav-logo .bars { display: none; align-items: flex-end; gap: 3px; height: 16px; }
.nav-logo .bars span { width: 4px; border-radius: 2px 2px 0 0; display: block; }
.nav-logo .bars span:nth-child(1) { height: 8px;  background: var(--html); }
.nav-logo .bars span:nth-child(2) { height: 12px; background: var(--css); }
.nav-logo .bars span:nth-child(3) { height: 16px; background: var(--js); }

.nav-back {
  font-family: 'Space Mono', monospace; font-size: 0.7rem;
  color: var(--text-muted); text-decoration: none;
  display: flex; align-items: center; gap: 0.35rem; transition: color 0.2s;
}
.nav-back:hover { color: var(--html); }

.nav-right { display: flex; align-items: center; gap: 0.6rem; }
.theme-toggle {
  background: none; border: 1px solid var(--border); border-radius: 999px;
  padding: 0.3rem 0.65rem; cursor: pointer;
  font-family: 'Space Mono', monospace; font-size: 0.68rem;
  color: var(--text-muted); transition: all 0.2s;
}
.theme-toggle:hover { color: var(--text); border-color: var(--text-muted); }

/* FILTERS — mobile-first */
.filter-section {
  margin-top: 5rem;
  padding: 0 1.1rem 1.5rem;
  display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap;
}
@media (min-width: 700px) { .filter-section { padding: 0 2.5rem 2rem; gap: 0.6rem; } }
.filter-label {
  font-family: 'Space Mono', monospace; font-size: 0.62rem;
  color: var(--text-muted); letter-spacing: 0.1em; margin-right: 0.15rem;
}
.filter-btn {
  font-family: 'Space Mono', monospace; font-size: 0.65rem;
  padding: 0.28rem 0.7rem; border-radius: 3px;
  border: 1px solid var(--border); background: transparent;
  color: var(--text-muted); cursor: pointer; letter-spacing: 0.04em; transition: all 0.2s;
}
.filter-btn:hover { border-color: var(--text-muted); color: var(--text); }
.filter-btn.active { background: var(--html); border-color: var(--html); color: #fff; }
.filter-btn.active.css-f { background: var(--css); border-color: var(--css); }
.filter-btn.active.js-f  { background: #c9a800; border-color: #c9a800; }

.results-count {
  padding: 0 1.1rem 1.25rem;
  font-family: 'Space Mono', monospace; font-size: 0.65rem;
  color: var(--text-muted); letter-spacing: 0.05em;
}
@media (min-width: 700px) { .results-count { padding: 0 2.5rem 1.5rem; } }
.results-count span { color: var(--html); }

/* GRID — mobile-first */
.projects-section { padding: 0 1.1rem 4rem; }
@media (min-width: 700px) { .projects-section { padding: 0 2.5rem 5rem; } }

.projects-grid { display: flex; flex-direction: column; gap: 1.1rem; }
@media (min-width: 500px) {
  .projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.1rem; }
}
@media (min-width: 900px) {
  .projects-grid { grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
}

/* CARDS */
.project-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; overflow: hidden;
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
  animation: fadeUp 0.4s ease both;
}
@keyframes fadeUp { from { opacity:0; transform:translateY(18px); } to { opacity:1; transform:translateY(0); } }
.project-card:hover { transform: translateY(-5px); box-shadow: 0 14px 36px rgba(0,0,0,0.16); }
.card-a-html:hover { border-color: var(--html); }
.card-a-css:hover  { border-color: var(--css); }
.card-a-js:hover   { border-color: var(--js); }

.card-preview { width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; background: var(--bg2); }
.card-preview-placeholder {
  width: 100%; aspect-ratio: 16/9; background: var(--bg2);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Space Mono', monospace; font-size: 0.65rem;
  color: var(--text-muted); letter-spacing: 0.08em; position: relative; overflow: hidden;
}
.card-preview-placeholder::before {
  content: ''; position: absolute; inset: 0; opacity: 0.35;
  background: repeating-linear-gradient(45deg, transparent, transparent 8px, var(--border) 8px, var(--border) 9px);
}
.card-preview-placeholder span { position: relative; z-index: 1; }
.card-body { padding: 1rem 1.2rem 1.25rem; }
.card-title { font-family: 'Montserrat', sans-serif; font-weight: 700; font-size: 0.93rem; margin-bottom: 0.4rem; color: var(--text); }
.card-desc  { font-size: 0.8rem; line-height: 1.6; color: var(--text-muted); margin-bottom: 0.85rem; }
.card-tags  { display: flex; flex-wrap: wrap; gap: 0.3rem; margin-bottom: 0.9rem; }
.tag {
  font-family: 'Space Mono', monospace; font-size: 0.58rem;
  padding: 0.16rem 0.48rem; border-radius: 3px;
  background: var(--bg2); color: var(--text-muted); border: 1px solid var(--border);
}
.tag.html { background: rgba(227,76,38,0.08);  color: var(--html); border-color: rgba(227,76,38,0.25); }
.tag.css  { background: rgba(102,51,153,0.08); color: var(--css);  border-color: rgba(102,51,153,0.25); }
.tag.js   { background: rgba(255,211,67,0.08); color: #c9a800;     border-color: rgba(255,211,67,0.25); }
.card-link {
  font-family: 'Space Mono', monospace; font-size: 0.68rem;
  color: var(--html); text-decoration: none;
  display: inline-flex; align-items: center; gap: 0.3rem; transition: gap 0.2s;
}
.card-link:hover { gap: 0.55rem; }
.card-link::after { content: '→'; }

/* EMPTY / SKELETON */
.empty-state {
  grid-column: 1/-1; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 4rem 1.5rem; text-align: center; gap: 0.75rem;
}
.empty-icon  { font-family: 'Space Mono', monospace; font-size: 1.8rem; color: var(--border); }
.empty-title { font-family: 'Montserrat', sans-serif; font-weight: 700; font-size: 1rem; color: var(--text-muted); }
.empty-sub   { font-size: 0.82rem; color: var(--text-muted); }

.skeleton-card { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.skeleton-preview {
  width: 100%; aspect-ratio: 16/9;
  background: linear-gradient(90deg, var(--bg2) 25%, var(--border) 50%, var(--bg2) 75%);
  background-size: 200% 100%; animation: shimmer 1.4s infinite;
}
@keyframes shimmer { to { background-position: -200% 0; } }
.skeleton-body { padding: 1rem 1.2rem; display: flex; flex-direction: column; gap: 0.55rem; }
.skeleton-line {
  height: 11px; border-radius: 3px;
  background: linear-gradient(90deg, var(--bg2) 25%, var(--border) 50%, var(--bg2) 75%);
  background-size: 200% 100%; animation: shimmer 1.4s infinite;
}

/* FOOTER — mobile-first */
footer {
  border-top: 1px solid var(--border); padding: 1.5rem 1.1rem;
  display: flex; flex-direction: column; gap: 0.5rem;
}
@media (min-width: 600px) {
  footer { flex-direction: row; justify-content: space-between; align-items: center; padding: 2rem 2.5rem; }
}
.foot-logo { font-family: 'Montserrat', sans-serif; font-weight: 900; font-size: 0.9rem; letter-spacing: 0.08em; }
.foot-copy { font-family: 'Space Mono', monospace; font-size: 0.62rem; color: var(--text-muted); }