/* ─── PAGE HEADER ─── */
.page-header {
  padding-top: 140px;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 80px;
}

.page-header h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.page-header p {
  font-size: 13px;
  color: var(--muted);
}

/* ─── FILTER TABS ─── */
.filter-row {
  display: flex;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 6px 16px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 3px;
  transition: all 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ─── PROJECTS GRID ─── */
.projects-grid,
.repo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  width: 100%;
  align-items: stretch;
}

.project-card,
.repo-card {
  width: 100%;
  min-width: 0;
}

.project-card {
  background: linear-gradient(180deg, rgba(17,17,20,0.94), rgba(17,17,20,0.98));
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.28s ease;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: 0 12px 28px rgba(0,0,0,0.18);
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--blue));
  opacity: 0;
  transition: opacity 0.3s;
}

.project-card:hover {
  border-color: rgba(0,255,136,0.25);
  background: linear-gradient(180deg, rgba(24,24,29,1), rgba(17,17,20,1));
  transform: translateY(-4px);
  box-shadow: 0 22px 44px rgba(0,0,0,0.34);
}

.project-card:hover::before {
  opacity: 1;
}

/* PREVIEW AREA */
.project-preview {
  height: 160px;
  background: var(--bg3);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-preview-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,255,136,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,255,136,0.04) 1px, transparent 1px);
  background-size: 24px 24px;
}

.project-preview-icon {
  font-size: 36px;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 0 12px rgba(0,255,136,0.3));
}

.project-preview-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 3px 8px;
  border-radius: 3px;
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
}

.badge-web {
  background: rgba(68,136,255,0.15);
  color: var(--blue);
  border: 1px solid rgba(68,136,255,0.3);
}

.badge-tool {
  background: rgba(255,204,0,0.1);
  color: var(--yellow);
  border: 1px solid rgba(255,204,0,0.3);
}

.badge-study {
  background: rgba(0,255,136,0.08);
  color: var(--accent);
  border: 1px solid rgba(0,255,136,0.2);
}

/* IFRAME PREVIEW */
.project-preview iframe {
  width: 100%;
  height: 100%;
  border: none;
  pointer-events: none;
  transform-origin: top left;
}

.project-preview .preview-overlay {
  position: absolute;
  inset: 0;
  cursor: pointer;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10,10,11,0.5);
  opacity: 0;
  transition: opacity 0.2s;
}

.project-card:hover .preview-overlay {
  opacity: 1;
}

.preview-overlay-text {
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* CARD BODY */
.project-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-body h3 {
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.project-body p {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
}

.project-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.project-tag {
  padding: 2px 8px;
  border-radius: 3px;
  font-size: 10px;
  background: var(--bg3);
  color: var(--muted2);
  border: 1px solid var(--border);
}

.project-links {
  display: flex;
  gap: 8px;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 11px;
  color: var(--muted2);
  text-decoration: none;
  transition: all 0.2s;
}

.project-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

.project-link svg {
  flex-shrink: 0;
}

/* ─── GITHUB REPOS ─── */
.github-section {
  margin-top: 80px;
}

.github-loading {
  text-align: center;
  padding: 40px;
  color: var(--muted);
  font-size: 12px;
}

.repo-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.repo-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  transition: all 0.2s;
  text-decoration: none;
  display: block;
}

.repo-card:hover {
  border-color: var(--border2);
  background: var(--bg3);
  transform: translateY(-2px);
}

.repo-card h4 {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.repo-card h4 svg {
  flex-shrink: 0;
  color: var(--muted);
}

.repo-card p {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 14px;
}

.repo-meta {
  display: flex;
  gap: 14px;
  font-size: 11px;
  color: var(--muted);
  align-items: center;
}

.repo-lang {
  display: flex;
  align-items: center;
  gap: 4px;
}

.lang-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.lang-html { background: #e34c26; }
.lang-js { background: #f1e05a; }
.lang-css { background: #563d7c; }
.lang-py { background: #3572A5; }
.lang-default { background: var(--muted); }

.repo-stars {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ─── EMPTY STATE ─── */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px;
  color: var(--muted);
}

.empty-state code {
  display: block;
  font-size: 12px;
  margin-top: 12px;
  color: var(--accent);
}