/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  --bg:          #0f0f0f;
  --bg-card:     #111111;
  --bg-input:    #0d0d0d;
  --accent:      #00ff88;
  --accent-hover: #00cc6a;
  --accent-glow: rgba(0, 255, 136, 0.12);
  --accent-dim:  rgba(0, 255, 136, 0.15);
  --text:        #e2e2e2;
  --muted:       #666666;
  --muted2:      #555555;
  --border:      #1e1e1e;
  --border-dim:  #222222;
  --font-mono:   'JetBrains Mono', monospace;
  --font-body:   -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --nav-h:       60px;
  --max-w:       900px;
  --ease:        0.25s ease;
}

/* ============================================================
   RESET
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html  { scroll-behavior: smooth; }
body  { background: var(--bg); color: var(--text); font-family: var(--font-body); line-height: 1.6; }
a     { text-decoration: none; color: inherit; }
ul    { list-style: none; }

/* ============================================================
   UTILITIES
   ============================================================ */
.mono   { font-family: var(--font-mono); }
.accent { color: var(--accent); }
.muted  { color: var(--muted); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 2.5rem;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.5rem 1.2rem;
  border-radius: 3px;
  cursor: pointer;
  transition: var(--ease);
  border: none;
}
.btn-primary               { background: var(--accent); color: var(--bg); font-weight: 700; }
.btn-primary:hover         { background: var(--accent-hover); }
.btn-secondary             { background: transparent; color: var(--muted); border: 1px solid var(--border-dim); }
.btn-secondary:hover       { border-color: var(--accent); color: var(--accent); }

/* ============================================================
   TAGS
   ============================================================ */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 2px;
  border: 1px solid;
}
.tag--primary   { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }
.tag--secondary { border-color: var(--border-dim); color: var(--muted); }

/* ============================================================
   NAVIGATION
   ============================================================ */
#nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  backdrop-filter: blur(10px);
  background: rgba(15, 15, 15, 0.85);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.nav-brand            { font-family: var(--font-mono); font-size: 0.85rem; color: var(--muted); }
.nav-brand .mono      { color: var(--accent); }

.nav-links            { display: flex; gap: 1.5rem; }
.nav-links a          { font-family: var(--font-mono); font-size: 0.75rem; color: var(--muted); transition: color var(--ease); }
.nav-links a:hover,
.nav-links a.active   { color: var(--accent); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--muted);
  transition: transform var(--ease), opacity var(--ease);
}
.hamburger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav-overlay {
  display: none;
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  background: var(--bg);
  z-index: 99;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
}
.nav-overlay.open { display: flex; }
.nav-overlay-close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
  transition: color var(--ease);
}
.nav-overlay-close:hover { color: var(--accent); }
.nav-overlay a    { font-family: var(--font-mono); font-size: 1.1rem; color: var(--muted); transition: color var(--ease); }
.nav-overlay a:hover { color: var(--accent); }

/* ============================================================
   SECTION BASE
   ============================================================ */
section          { padding: 6rem 0; }
section:not(#hero) { padding-top: calc(5rem + var(--nav-h)); }

/* ============================================================
   HERO
   ============================================================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 0 24px;
}

#particles { position: absolute; inset: 0; z-index: 0; }

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  font-family: var(--font-mono);
}

.hero-prompt  { font-size: 0.85rem; color: var(--muted); margin-bottom: 0.3rem; }
.hero-status  { font-size: 0.8rem;  color: var(--muted); margin-bottom: 1.8rem; }

.hero-name {
  font-family: var(--font-body);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.hero-role {
  font-size: clamp(0.85rem, 2vw, 1.05rem);
  color: var(--accent);
  margin-bottom: 1rem;
  min-height: 1.8em;
}

.cursor { animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

.hero-tagline { font-size: 0.8rem; margin-bottom: 2.5rem; }

.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ============================================================
   ABOUT
   ============================================================ */
.about-bio {
  font-size: 1rem;
  line-height: 1.85;
  max-width: 620px;
  color: var(--text);
  margin-bottom: 3rem;
}

.about-stats { display: flex; gap: 3rem; }

.stat          { display: flex; flex-direction: column; gap: 0.2rem; }
.stat-value    { font-family: var(--font-mono); font-size: 1.8rem; font-weight: 700; color: var(--accent); line-height: 1; }
.stat-label    { font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.1em; color: var(--muted2); }

/* ============================================================
   SKILLS
   ============================================================ */
.skills-grid   { display: flex; flex-direction: column; gap: 2rem; }

.skill-category {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--muted2);
  margin-bottom: 0.6rem;
}

.skill-tags { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* ============================================================
   EXPERIENCE
   ============================================================ */
.timeline {
  position: relative;
  padding-left: 2rem;
  border-left: 1px solid var(--border-dim);
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.timeline-entry { position: relative; }

.timeline-node {
  position: absolute;
  left: calc(-2rem - 4px);
  top: 5px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1px solid var(--border-dim);
  background: var(--bg);
}
.timeline-entry--current .timeline-node {
  border-color: var(--accent);
  box-shadow: 0 0 8px var(--accent-dim);
}

.timeline-role { font-family: var(--font-mono); font-size: 0.9rem; font-weight: 600; color: var(--text); margin-bottom: 0.25rem; }
.timeline-entry--current .timeline-role { color: var(--accent); }

.timeline-date   { font-family: var(--font-mono); font-size: 0.75rem; color: var(--muted); margin-bottom: 0.8rem; }

.timeline-bullets { display: flex; flex-direction: column; gap: 0.4rem; }
.timeline-bullets li {
  font-size: 0.9rem;
  color: var(--muted);
  padding-left: 1.2rem;
  position: relative;
}
.timeline-bullets li::before { content: '›'; position: absolute; left: 0; color: var(--muted2); }

/* ============================================================
   PROJECTS
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.4rem;
  transition: border-color var(--ease), box-shadow var(--ease);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}
.project-card:hover { border-color: var(--accent); box-shadow: 0 0 14px var(--accent-glow); }

.project-name  { font-family: var(--font-mono); font-size: 0.9rem; font-weight: 600; color: var(--text); }
.project-desc  { font-size: 0.85rem; color: var(--muted); line-height: 1.65; flex: 1; }
.project-tags  { display: flex; gap: 0.4rem; flex-wrap: wrap; }

.project-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted2);
  border: 1px solid var(--border-dim);
  padding: 2px 10px;
  border-radius: 2px;
  display: inline-block;
  transition: color var(--ease), border-color var(--ease);
}
.project-link:hover { color: var(--accent); border-color: var(--accent); }

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
  align-items: start;
}

.contact-links { display: flex; flex-direction: column; gap: 1.4rem; }

.contact-link         { display: flex; flex-direction: column; gap: 0.2rem; }
.contact-link:hover .contact-url { color: var(--accent); }

.contact-label { font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.1em; color: var(--accent); }
.contact-url   { font-family: var(--font-mono); font-size: 0.8rem; color: var(--muted); transition: color var(--ease); }

.contact-form { display: flex; flex-direction: column; gap: 0.8rem; }

.form-input,
.form-textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-dim);
  border-radius: 2px;
  padding: 0.6rem 0.8rem;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  transition: border-color var(--ease);
  outline: none;
}
.form-input::placeholder,
.form-textarea::placeholder { color: var(--muted2); }
.form-input:focus,
.form-textarea:focus { border-color: var(--accent); }
.form-textarea { resize: vertical; min-height: 100px; }

.form-status           { font-family: var(--font-mono); font-size: 0.75rem; min-height: 1.2em; }
.form-status--success  { color: var(--accent); }
.form-status--error    { color: #ff4444; }

/* ============================================================
   FOOTER
   ============================================================ */
footer { border-top: 1px solid var(--border); padding: 2rem 24px; text-align: center; }
footer p { font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted2); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .nav-links   { display: none; }
  .hamburger   { display: flex; }

  section:not(#hero) { padding-top: calc(4rem + var(--nav-h)); }

  .about-stats   { gap: 1.5rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-grid  { grid-template-columns: 1fr; }
  .hero-cta      { flex-direction: column; align-items: flex-start; }
}