/* ===== CSS Variables ===== */
:root {
  --bg: #0d1117;
  --bg-secondary: #161b22;
  --bg-card: #1c2128;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-hover: #79b8ff;
  --green: #3fb950;
  --orange: #ffa657;
  --card-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --radius: 10px;
  --transition: 200ms ease;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
code { font-family: 'JetBrains Mono', monospace; }

/* ===== Nav ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  color: var(--accent);
  font-size: 1.1rem;
}
.nav nav { display: flex; gap: 0.25rem; }
.nav nav a {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.4rem 0.9rem;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
  position: relative;
}
.nav nav a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}
.nav nav a.active {
  color: var(--accent);
  background: rgba(88, 166, 255, 0.1);
}
.nav nav a.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* ===== Hero ===== */
.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: 5rem 2rem;
  /* dot-grid background */
  background-image:
    radial-gradient(ellipse at 20% 60%, rgba(88, 166, 255, 0.08) 0%, transparent 55%),
    radial-gradient(circle, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: auto, 28px 28px;
}

.hero-grid {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-content { display: flex; flex-direction: column; }

.terminal-prompt {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
}
.prompt-user { color: var(--green); }
.prompt-sep { color: var(--text-muted); }
.prompt-path { color: var(--accent); }
.prompt-dollar { color: var(--text-muted); margin: 0 0.5rem; }
.prompt-cmd { color: var(--text); }
.cursor { animation: blink 1s step-end infinite; color: var(--accent); }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.hero-title {
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1.1rem;
}
.hero-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 1.5rem;
}
/* Highlighted keywords inside the tagline */
.hero-subtitle .kw {
  color: var(--accent);
  font-weight: 500;
}

.hero-badges { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 2rem; }
.badge {
  font-size: 0.72rem;
  font-family: 'JetBrains Mono', monospace;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-muted);
  background: var(--bg-secondary);
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.btn { padding: 0.75rem 1.5rem; border-radius: var(--radius); font-weight: 600; font-size: 0.9rem; transition: all var(--transition); cursor: pointer; }
.btn-primary { background: var(--accent); color: #0d1117; border: none; }
.btn-primary:hover { background: var(--accent-hover); color: #0d1117; }
.btn-secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ===== Code window (hero right column) ===== */
.hero-code-wrap {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.code-window {
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(88,166,255,0.06);
}

.code-window-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}
.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot-red    { background: #ff5f57; }
.dot-yellow { background: #febc2e; }
.dot-green  { background: #28c840; }
.code-window-title {
  margin-left: 0.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.code-window-body {
  padding: 1.4rem 1.6rem;
  margin: 0;
  overflow-x: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  line-height: 1.8;
}
.code-window-body code { font-family: inherit; }

/* C# syntax colours */
.cs-comment { color: #6e7681; font-style: italic; }
.cs-kw      { color: #ff7b72; }
.cs-type    { color: #79c0ff; }
.cs-prop    { color: #e3b341; }
.cs-str     { color: #a5d6ff; }
.cs-num     { color: #79c0ff; }
.cs-op      { color: #8b949e; }
.cs-brace   { color: var(--text-muted); }

/* Stats row below code window */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.hero-stat {
  flex: 1;
  text-align: center;
  padding: 0.85rem 0.5rem;
}
.hero-stat-divider {
  width: 1px;
  height: 2.5rem;
  background: var(--border);
}
.stat-number {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.25rem;
}
.stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ===== Sections ===== */
.container { max-width: 1100px; margin: 0 auto; padding: 0 2rem; }
.projects-section { padding: 5rem 0; }
.section-title { font-size: 2rem; font-weight: 700; margin-bottom: 0.5rem; }
.section-subtitle { color: var(--text-muted); margin-bottom: 2rem; }
.section-subtitle code { color: var(--accent); font-size: 0.9em; }

/* ===== Filter Bar ===== */
.filter-bar { display: flex; gap: 0.5rem; margin-bottom: 2rem; flex-wrap: wrap; }
.filter-btn {
  padding: 0.4rem 1rem;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: none;
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition);
}
.filter-btn:hover,
.filter-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(88, 166, 255, 0.1);
}

/* ===== Project Cards ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
}
.project-card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: var(--card-shadow); }

.card-image-wrap { position: relative; overflow: hidden; height: 180px; background: var(--bg-secondary); }
.card-image-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 300ms ease; }
.project-card:hover .card-image-wrap img { transform: scale(1.04); }
.card-image-placeholder {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 2.5rem;
  color: var(--border);
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-card) 100%);
}
.card-github-overlay {
  position: absolute; inset: 0;
  background: rgba(13, 17, 23, 0.75);
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}
/* Hide GitHub overlay when stack panel is present — stack takes priority */
.project-card:hover .card-github-overlay:not(:has(~ .card-stack-panel)) { opacity: 1; }
.project-card:has(.card-stack-panel):hover .card-github-overlay { opacity: 0; }
.card-github-overlay a {
  display: flex; align-items: center; gap: 0.5rem;
  color: #fff; font-weight: 600; font-size: 0.9rem;
  padding: 0.6rem 1.2rem;
  border: 2px solid #fff;
  border-radius: var(--radius);
  transition: background var(--transition);
}
.card-github-overlay a:hover { background: rgba(255,255,255,0.15); }
.card-github-overlay svg { width: 18px; height: 18px; }

/* ===== Stack panel — slides up from bottom of card image on hover ===== */
.card-stack-panel {
  position: absolute;
  inset: 0;
  background: rgba(10, 14, 20, 0.96);
  backdrop-filter: blur(8px);
  border-top: 1px solid rgba(88, 166, 255, 0.2);
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  transform: translateY(100%);
  transition: transform 250ms ease;
}
.project-card:hover .card-stack-panel { transform: translateY(0); }

.stack-panel-title {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.6rem;
}
.stack-groups { display: flex; flex-direction: column; gap: 0.45rem; }
.stack-group { display: flex; align-items: baseline; gap: 0.5rem; }
.stack-group-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  min-width: 52px;
  flex-shrink: 0;
}
.stack-items { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.stack-item {
  font-size: 0.68rem;
  font-family: 'JetBrains Mono', monospace;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: rgba(88, 166, 255, 0.1);
  border: 1px solid rgba(88, 166, 255, 0.2);
  color: var(--text);
}

.featured-ribbon {
  position: absolute; top: 10px; right: -8px;
  background: var(--orange); color: #1a1a1a;
  font-size: 0.65rem; font-weight: 700; text-transform: uppercase;
  padding: 0.2rem 0.8rem; border-radius: 4px 0 0 4px;
  letter-spacing: 0.05em;
}

.card-body { padding: 1.2rem; flex: 1; display: flex; flex-direction: column; gap: 0.75rem; }
.card-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 0.5rem; }
.card-title { font-size: 1rem; font-weight: 600; line-height: 1.3; }
.card-stars { display: flex; align-items: center; gap: 0.2rem; font-size: 0.8rem; color: var(--text-muted); white-space: nowrap; }
.card-stars svg { width: 13px; height: 13px; fill: var(--orange); }
.card-description { font-size: 0.875rem; color: var(--text-muted); line-height: 1.5; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.card-tag { font-size: 0.7rem; font-family: 'JetBrains Mono', monospace; padding: 0.2rem 0.5rem; border-radius: 4px; background: rgba(88, 166, 255, 0.1); color: var(--accent); border: 1px solid rgba(88, 166, 255, 0.2); }
.card-lang { font-size: 0.7rem; color: var(--text-muted); display: flex; align-items: center; gap: 0.3rem; }
.lang-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }

.card-footer { padding: 0.8rem 1.2rem; border-top: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
.card-actions { display: flex; gap: 0.75rem; }
.card-btn { font-size: 0.78rem; font-weight: 500; color: var(--text-muted); display: flex; align-items: center; gap: 0.3rem; transition: color var(--transition); }
.card-btn:hover { color: var(--accent); }
.card-btn svg { width: 14px; height: 14px; }
.card-btn-icon { padding: 0.1rem; }
.card-btn-icon svg { width: 16px; height: 16px; }
.source-badge { font-size: 0.65rem; font-family: 'JetBrains Mono', monospace; color: var(--text-muted); opacity: 0.5; }

/* ===== Loading / Empty ===== */
.projects-loading { text-align: center; padding: 3rem; color: var(--text-muted); }
.spinner { width: 32px; height: 32px; border: 3px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.7s linear infinite; margin: 0 auto 1rem; }
@keyframes spin { to { transform: rotate(360deg); } }
.projects-empty { text-align: center; padding: 3rem; color: var(--text-muted); }
.hidden { display: none !important; }

/* ===== Contact ===== */
.contact-section {
  padding: 6rem 0 5rem;
  background:
    radial-gradient(ellipse at 70% 50%, rgba(88, 166, 255, 0.07) 0%, transparent 60%),
    var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.contact-inner {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.contact-availability {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--green);
  background: rgba(63, 185, 80, 0.1);
  border: 1px solid rgba(63, 185, 80, 0.25);
  border-radius: 20px;
  padding: 0.3rem 0.9rem;
  margin-bottom: 2rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.contact-availability::before {
  content: '';
  width: 7px; height: 7px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.contact-heading {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1rem;
  color: var(--text);
}

.contact-sub {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 3rem;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* Big email link */
.contact-email-wrap { margin-bottom: 3rem; }
.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  font-weight: 600;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.75rem;
  transition: all var(--transition);
}
.contact-email:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(88, 166, 255, 0.06);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(88, 166, 255, 0.15);
}
.contact-email svg { width: 20px; height: 20px; flex-shrink: 0; opacity: 0.7; }

/* Social row */
.contact-socials {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.social-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.75rem 1.4rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  transition: all var(--transition);
}
.social-link:hover {
  color: var(--text);
  border-color: var(--accent);
  background: rgba(88, 166, 255, 0.06);
  transform: translateY(-2px);
}
.social-link svg { width: 18px; height: 18px; flex-shrink: 0; }

/* ===== Footer ===== */
footer {
  text-align: center;
  padding: 1.75rem 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-code-wrap { order: -1; } /* code window above text on small screens */
  .code-window-body { font-size: 0.78rem; }
}

@media (max-width: 600px) {
  .nav { padding: 0.75rem 1rem; }
  .nav nav { gap: 0; }
  .hero { padding: 3rem 1rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-socials { flex-direction: column; align-items: center; }
  .social-link { width: 100%; max-width: 280px; justify-content: center; }
}