/* ============================================================
   KULAKOV PORTFOLIO — style.css
   Dark grey theme, green accent
   ============================================================ */

:root {
  --bg:          #0a0a0a;
  --bg-2:        #111111;
  --bg-card:     #151515;
  --bg-card-h:   #1a1a1a;
  --border:      #222222;
  --border-h:    #333333;
  --accent:      #00c875;
  --accent-dim:  rgba(0, 200, 117, 0.12);
  --accent-glow: rgba(0, 200, 117, 0.25);
  --text-1:      #ededed;
  --text-2:      #888888;
  --text-3:      #444444;
  --mono:        'JetBrains Mono', 'Fira Code', monospace;
  --sans:        'Inter', system-ui, sans-serif;
  --radius:      10px;
  --radius-lg:   16px;
  --transition:  0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text-1);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

::selection { background: var(--accent-dim); color: var(--accent); }

/* scrollbar */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-h); border-radius: 4px; }

/* ---- utilities ---- */
.container { max-width: 1100px; margin: 0 auto; padding: 0 32px; }
.accent { color: var(--accent); }

/* ============================================================
   NAV
   ============================================================ */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 32px;
  height: 64px;
  display: flex;
  align-items: center;
  background: rgba(10,10,10,0.5);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

#nav.scrolled {
  border-bottom-color: var(--border);
  background: rgba(10,10,10,0.85);
}

.nav-inner {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-logo {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-right: auto;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav-links a {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-2);
  transition: color var(--transition);
}

.nav-links a:hover { color: var(--text-1); }

.nav-gh {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-family: var(--mono);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 12px 28px;
  background: var(--accent);
  color: #000;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius);
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 24px;
  border: 1px solid var(--border-h);
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-family: var(--mono);
  color: var(--text-2);
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

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

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

#code-canvas {
  position: absolute;
  inset: 0;
  opacity: 0.35;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
  padding-top: 80px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 28px;
  letter-spacing: 0.04em;
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 var(--accent-glow); }
  50% { opacity: 0.6; box-shadow: 0 0 0 6px transparent; }
}

#hero h1 {
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.name-accent { color: var(--accent); }

.typewriter-wrap {
  font-family: var(--mono);
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-2);
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: wrap;
}

.typewriter-prefix { color: var(--text-3); }
#typewriter { color: var(--accent); }

.cursor-blink {
  color: var(--accent);
  animation: blink 1s step-end infinite;
}

@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.hero-desc {
  font-size: clamp(0.95rem, 2vw, 1.08rem);
  color: var(--text-2);
  max-width: 580px;
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  animation: fadeInUp 1s ease 1.5s both;
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--text-3), transparent);
  animation: scrollAnim 2s ease-in-out infinite;
}

@keyframes scrollAnim {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ============================================================
   SECTION COMMON
   ============================================================ */
section { padding: 120px 0; }

.section-label {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 60px;
}

.section-subtitle {
  color: var(--text-2);
  margin-top: -40px;
  margin-bottom: 40px;
  font-size: 0.95rem;
}

.section-subtitle code {
  font-family: var(--mono);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 4px;
  color: var(--accent);
  font-size: 0.85rem;
}

/* ============================================================
   ABOUT
   ============================================================ */
#about { background: var(--bg-2); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-text p {
  color: var(--text-2);
  margin-bottom: 20px;
  line-height: 1.85;
}

.about-text strong { color: var(--text-1); }

.about-stats {
  display: flex;
  gap: 40px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.stat { display: flex; flex-direction: column; gap: 4px; }
.stat-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  font-family: var(--mono);
  line-height: 1;
}
.stat-label { font-size: 0.8rem; color: var(--text-2); }

/* timeline */
.timeline { padding-left: 20px; }

.tl-item {
  position: relative;
  padding-left: 32px;
  padding-bottom: 40px;
}

.tl-item:last-child { padding-bottom: 0; }

.tl-item::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 20px;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.tl-item:last-child::before { display: none; }

.tl-dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.tl-dot--dim {
  background: var(--border-h);
  box-shadow: none;
}

.tl-date {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.06em;
}

.tl-content h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 6px 0 6px;
}

.tl-content p { font-size: 0.9rem; color: var(--text-2); }

/* ============================================================
   SKILLS
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 28px;
}

.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color var(--transition), transform var(--transition);
}

.skill-group:hover {
  border-color: var(--border-h);
  transform: translateY(-2px);
}

.skill-group-title {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-2);
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}

.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.tag {
  display: inline-block;
  padding: 5px 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-2);
  transition: all var(--transition);
}

.tag:hover, .skill-group:hover .tag {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

.tag--sm { font-size: 0.72rem; padding: 3px 9px; }
.tag--dim { color: var(--text-3); border-color: var(--border); }

/* ============================================================
   PROJECTS
   ============================================================ */
#projects { background: var(--bg-2); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  cursor: default;
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.4), 0 0 0 1px var(--accent-dim);
}

.project-card--ghost {
  opacity: 0.45;
  border-style: dashed;
}

.project-card--ghost:hover {
  opacity: 0.6;
  border-color: var(--border-h);
  box-shadow: none;
  transform: none;
}

.project-card-inner { padding: 28px; height: 100%; display: flex; flex-direction: column; }

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
}

.project-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-dim);
  border: 1px solid rgba(0,200,117,0.2);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.project-icon--dim {
  background: var(--bg-2);
  border-color: var(--border);
  color: var(--text-3);
}

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

.project-link {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-2);
  transition: all var(--transition);
}

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

.project-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.project-desc {
  font-size: 0.9rem;
  color: var(--text-2);
  line-height: 1.75;
  margin-bottom: 20px;
  flex: 1;
}

.project-stack { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; }

.project-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  margin-top: auto;
}

.project-status--done { color: var(--accent); }
.project-status--wip { color: #f59e0b; }

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 2s ease-in-out infinite;
}

/* ============================================================
   TERMINAL
   ============================================================ */
#terminal { background: var(--bg); }

.terminal-window {
  background: #0d0d0d;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0,0,0,0.6);
  font-family: var(--mono);
  max-width: 820px;
}

.terminal-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: #111111;
  border-bottom: 1px solid var(--border);
}

.terminal-dots { display: flex; gap: 6px; }

.tdot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.tdot--red    { background: #ff5f57; }
.tdot--yellow { background: #febc2e; }
.tdot--green  { background: #28c840; }

.terminal-title {
  font-size: 0.78rem;
  color: var(--text-2);
  letter-spacing: 0.04em;
}

.terminal-body {
  padding: 20px 24px;
  min-height: 360px;
  max-height: 520px;
  overflow-y: auto;
  cursor: text;
}

#terminal-output {
  font-size: 0.85rem;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

.t-line { display: block; }
.t-cmd  { color: var(--text-2); margin-bottom: 4px; }
.t-cmd .t-prompt-inline { color: var(--accent); }
.t-out  { color: var(--text-1); margin-bottom: 12px; display: block; }
.t-acc  { color: var(--accent); }
.t-dim  { color: var(--text-2); }
.t-err  { color: #f87171; }
.t-bold { font-weight: 600; }

.terminal-input-row {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: 8px;
}

.t-prompt {
  color: var(--accent);
  font-size: 0.85rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.t-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-1);
  font-family: var(--mono);
  font-size: 0.85rem;
  caret-color: var(--accent);
}

.t-input::placeholder { color: var(--text-3); }

/* ============================================================
   CONTACT
   ============================================================ */
#contact { background: var(--bg-2); }

.contact-sub {
  color: var(--text-2);
  margin-top: -40px;
  margin-bottom: 48px;
  font-size: 0.95rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  cursor: pointer;
}

.contact-card:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-2px);
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
  transition: all var(--transition);
}

.contact-card:hover .contact-icon {
  background: var(--accent-dim);
  border-color: var(--accent);
}

.contact-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.contact-value {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-1);
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  background: var(--bg);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-logo {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1rem;
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--text-2);
}

.footer-built {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-3);
  letter-spacing: 0.06em;
}

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  section { padding: 80px 0; }

  .nav-links { display: none; }
  .nav-gh span { display: none; }

  #hero h1 { font-size: 2.5rem; }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-stats { gap: 24px; }
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
}