/* ════════════════════════════════════════════
   RESET & VARIABLES
════════════════════════════════════════════ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg:           #08080f;
  --bg-surface:   #0d0d18;
  --bg-card:      #111120;
  --bg-elevated:  #161628;
  --border:       #1c1c2e;
  --border-hover: #2a2a40;
  --text:         #e4e4f0;
  --text-muted:   #7878a0;
  --text-dim:     #44445a;
  --accent:       #6366f1;
  --accent-h:     #4f52d9;
  --accent-soft:  rgba(99,102,241,0.12);
  --accent-glow:  rgba(99,102,241,0.25);
  --cyan:         #06b6d4;
  --cyan-soft:    rgba(6,182,212,0.12);
  --green:        #34d399;
  --red:          #f87171;
  --yellow:       #fbbf24;
  --radius:       10px;
  --radius-lg:    16px;
  --radius-xl:    24px;
  --transition:   0.22s cubic-bezier(0.4,0,0.2,1);
  --max-width:    1100px;
  --shadow:       0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg:    0 12px 48px rgba(0,0,0,0.5);
}

[data-theme="light"] {
  --bg:           #f8f8fc;
  --bg-surface:   #f0f0f8;
  --bg-card:      #ffffff;
  --bg-elevated:  #ebebf5;
  --border:       #ddddf0;
  --border-hover: #c8c8e0;
  --text:         #0f0f1e;
  --text-muted:   #4a4a6a;
  --text-dim:     #9898b8;
  --accent:       #4f46e5;
  --accent-h:     #4338ca;
  --accent-soft:  rgba(79,70,229,0.1);
  --accent-glow:  rgba(79,70,229,0.2);
  --shadow:       0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg:    0 12px 48px rgba(0,0,0,0.12);
}

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
code, pre { font-family: 'JetBrains Mono', 'Fira Code', monospace; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }

/* ════════════════════════════════════════════
   SCROLL PROGRESS
════════════════════════════════════════════ */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--cyan));
  width: 0%;
  z-index: 9999;
  transition: width 0.1s linear;
}

/* ════════════════════════════════════════════
   NAVIGATION
════════════════════════════════════════════ */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  padding: 1rem 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}

#nav.scrolled {
  background: rgba(8,8,15,0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border);
  padding: 0.6rem 0;
}

[data-theme="light"] #nav.scrolled {
  background: rgba(248,248,252,0.88);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.nav-logo {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.nav-links { display: flex; gap: 0.25rem; }

.nav-link {
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
  letter-spacing: -0.01em;
}

.nav-link:hover, .nav-link.active { color: var(--text); background: var(--bg-elevated); }

.nav-actions { display: flex; align-items: center; gap: 0.5rem; }

.icon-btn {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0; /* hide text */
}

.icon-btn:hover { color: var(--text); background: var(--bg-elevated); border-color: var(--border-hover); }

.hamburger { display: none; flex-direction: column; gap: 4px; }
.hamburger span { display: block; width: 18px; height: 2px; background: var(--text-muted); border-radius: 2px; transition: var(--transition); }

/* ════════════════════════════════════════════
   HERO
════════════════════════════════════════════ */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 1.5rem 5rem;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: orbFloat 10s ease-in-out infinite;
}

.orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(99,102,241,0.22) 0%, transparent 65%);
  top: -150px; left: -100px;
  animation-duration: 12s;
}

.orb-2 {
  width: 380px; height: 380px;
  background: radial-gradient(circle, rgba(6,182,212,0.18) 0%, transparent 65%);
  top: 50px; right: -80px;
  animation-duration: 9s;
  animation-delay: -4s;
}

.orb-3 {
  width: 320px; height: 320px;
  background: radial-gradient(circle, rgba(167,139,250,0.15) 0%, transparent 65%);
  bottom: 0; left: 40%;
  animation-duration: 11s;
  animation-delay: -7s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0,0) scale(1); }
  25%       { transform: translate(20px,-25px) scale(1.03); }
  50%       { transform: translate(-15px, 15px) scale(0.97); }
  75%       { transform: translate(25px, 10px) scale(1.02); }
}

.hero-content { position: relative; max-width: 700px; }

.hero-eyebrow {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.hero-name {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, var(--text) 30%, var(--text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-role {
  font-size: 1.2rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-bottom: 1.75rem;
  min-height: 2em;
  letter-spacing: -0.01em;
}


.hero-statement {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 2.5rem;
  max-width: 580px;
}

.hero-cta { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 3rem; }

.scroll-hint {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-dim);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(6px); }
}

/* ════════════════════════════════════════════
   BUTTONS
════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.3rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: all var(--transition);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-h);
  border-color: var(--accent-h);
  box-shadow: 0 4px 20px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border);
}
.btn-outline:hover {
  color: var(--text);
  border-color: var(--border-hover);
  background: var(--bg-card);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border-color: transparent;
}
.btn-ghost:hover { color: var(--text); background: var(--bg-card); }

/* ════════════════════════════════════════════
   STATS BAR
════════════════════════════════════════════ */
.stats-bar {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
  padding: 2rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 1rem;
}

.stat-number {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}

/* ════════════════════════════════════════════
   SECTION BASE
════════════════════════════════════════════ */
.section {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.section-header { margin-bottom: 3rem; }

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.75rem;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 500px;
}

/* reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ════════════════════════════════════════════
   ABOUT
════════════════════════════════════════════ */
.about-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 3.5rem;
  align-items: start;
}

.about-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent) 0%, var(--cyan) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.about-avatar::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  z-index: -1;
  filter: blur(8px);
  opacity: 0.4;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 1.1rem;
  line-height: 1.8;
  font-size: 0.975rem;
}

.about-text strong { color: var(--text); font-weight: 600; }

.about-sidebar { display: flex; flex-direction: column; gap: 1rem; }

.info-card {
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}

.info-card:hover { border-color: var(--border-hover); }

.info-label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.info-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

/* ════════════════════════════════════════════
   EXPERIENCE TIMELINE
════════════════════════════════════════════ */
.timeline {
  position: relative;
  padding-left: 2.5rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px; top: 10px; bottom: 10px;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent) 0%, var(--border) 100%);
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
}
.timeline-item:last-child { margin-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -2.5rem;
  top: 8px;
  width: 15px; height: 15px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--bg);
  transition: all var(--transition);
}

.timeline-item:first-child .timeline-dot {
  background: var(--accent);
  box-shadow: 0 0 0 5px var(--accent-soft), 0 0 16px var(--accent-glow);
}

.timeline-card {
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.timeline-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
  transform: translateX(3px);
}

.timeline-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.6rem;
}

.timeline-role {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.timeline-company {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  padding: 0.2rem 0.6rem;
  background: var(--accent-soft);
  border-radius: 6px;
}

.timeline-date {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-weight: 500;
  margin-bottom: 0.9rem;
  font-family: 'JetBrains Mono', monospace;
}

.timeline-card p { font-size: 0.9rem; color: var(--text-muted); }

.timeline-card ul { padding-left: 1.1rem; list-style: disc; margin-top: 0.4rem; }

.timeline-card li {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
  line-height: 1.65;
}

.timeline-card li::marker { color: var(--accent); }

/* ════════════════════════════════════════════
   PROJECTS
════════════════════════════════════════════ */
.filter-bar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.filter-btn {
  padding: 0.4rem 0.9rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

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

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 1.25rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

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

.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

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

.project-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.9rem;
}

.project-lang {
  display: flex; align-items: center; gap: 0.4rem;
  font-size: 0.75rem; font-weight: 500;
  color: var(--text-muted);
}

.lang-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }

.project-stars {
  display: flex; align-items: center; gap: 0.3rem;
  font-size: 0.75rem; color: var(--text-dim);
}

.project-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.project-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.65;
  flex-grow: 1;
  margin-bottom: 1rem;
}

.project-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-dim);
}

.project-link {
  color: var(--accent);
  font-weight: 500;
  display: flex; align-items: center; gap: 0.3rem;
  transition: gap var(--transition);
}
.project-card:hover .project-link { gap: 0.5rem; }

.projects-loading, .projects-error {
  grid-column: 1/-1;
  text-align: center;
  padding: 4rem 0;
  color: var(--text-muted);
}

.spinner {
  width: 28px; height: 28px;
  border: 2px 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); } }

/* ════════════════════════════════════════════
   SKILLS
════════════════════════════════════════════ */
.skills-tabs { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 2rem; }

.tab-btn {
  padding: 0.4rem 1rem;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.tab-btn:hover, .tab-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 2px 12px var(--accent-glow);
}

.skills-panel { display: none; }
.skills-panel.active { display: flex; flex-wrap: wrap; gap: 0.6rem; }

.skill-tag {
  padding: 0.45rem 0.9rem;
  border-radius: 8px;
  font-size: 0.83rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  transition: all var(--transition);
  cursor: default;
}

.skill-tag:hover {
  color: var(--text);
  border-color: var(--border-hover);
  background: var(--bg-card);
  transform: translateY(-1px);
}

/* ════════════════════════════════════════════
   BLOG PREVIEW (on main page)
════════════════════════════════════════════ */
#blog-preview .section-header { margin-bottom: 2rem; }

.blog-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.blog-card {
  display: flex;
  flex-direction: column;
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  cursor: pointer;
}

.blog-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
  flex-wrap: wrap;
}

.blog-tag {
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.blog-tag-rust    { background: rgba(222,165,132,0.15); color: #dea584; }
.blog-tag-web     { background: rgba(99,102,241,0.15);  color: var(--accent); }
.blog-tag-systems { background: rgba(6,182,212,0.15);   color: var(--cyan); }
.blog-tag-career  { background: rgba(52,211,153,0.15);  color: var(--green); }
.blog-tag-graphics{ background: rgba(167,139,250,0.15); color: #a78bfa; }
.blog-tag-math    { background: rgba(251,191,36,0.15);  color: var(--yellow); }
.blog-tag-ai      { background: rgba(248,113,113,0.15); color: var(--red); }

.blog-date {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
}

.blog-read-time {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-left: auto;
}

.blog-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.blog-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
  flex-grow: 1;
  margin-bottom: 1rem;
}

.blog-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 500;
}

.view-all-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition);
}
.view-all-link:hover {
  border-color: var(--border-hover);
  color: var(--text);
  background: var(--bg-card);
}

/* ════════════════════════════════════════════
   CURRENTLY LEARNING
════════════════════════════════════════════ */
.learning-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.25rem;
}

.learning-card {
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.learning-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: var(--card-color, var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.learning-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.learning-card:hover::after { transform: scaleX(1); }

.learning-icon {
  font-size: 1.75rem;
  display: block;
  margin-bottom: 1rem;
}

.learning-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.learning-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.learning-progress {
  margin-top: 1rem;
  height: 3px;
  background: var(--bg-elevated);
  border-radius: 100px;
  overflow: hidden;
}

.learning-progress-bar {
  height: 100%;
  background: var(--card-color, var(--accent));
  border-radius: 100px;
  transition: width 1.5s ease;
  width: 0%;
}

/* ════════════════════════════════════════════
   CONTACT
════════════════════════════════════════════ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 3rem;
  align-items: start;
}

.contact-info h3 {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.contact-info p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 2rem;
  line-height: 1.75;
}

.contact-social { display: flex; flex-direction: column; gap: 0.75rem; }

.social-link {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}

.social-link:hover {
  border-color: var(--border-hover);
  transform: translateX(4px);
  box-shadow: var(--shadow);
}

.social-link svg { color: var(--accent); flex-shrink: 0; }

.social-link-text { display: flex; flex-direction: column; gap: 0.15rem; }

.social-link-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  font-weight: 600;
}

.social-link-value {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
}

/* Contact Form */
.contact-form { display: flex; flex-direction: column; gap: 1rem; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.form-group { display: flex; flex-direction: column; gap: 0.4rem; }

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

.form-group input, .form-group textarea {
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: inherit;
  font-size: 0.9rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  resize: vertical;
}

.form-group input::placeholder, .form-group textarea::placeholder {
  color: var(--text-dim);
}

.form-group input:focus, .form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-group textarea { min-height: 130px; }

.form-submit {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  width: fit-content;
}

.form-submit:hover {
  background: var(--accent-h);
  box-shadow: 0 4px 20px var(--accent-glow);
  transform: translateY(-1px);
}

/* ════════════════════════════════════════════
   FOOTER
════════════════════════════════════════════ */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-logo {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-links { display: flex; gap: 1.5rem; flex-wrap: wrap; }

.footer-links a {
  font-size: 0.82rem;
  color: var(--text-dim);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--text-muted); }

.footer-copy { font-size: 0.8rem; color: var(--text-dim); }

/* ════════════════════════════════════════════
   COMMAND PALETTE
════════════════════════════════════════════ */
.cmd-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 12vh 1.5rem 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.cmd-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.cmd-box {
  width: 100%;
  max-width: 560px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform: translateY(-10px) scale(0.98);
  transition: transform var(--transition);
}

.cmd-overlay.open .cmd-box {
  transform: translateY(0) scale(1);
}

.cmd-input-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.cmd-input-wrap svg { color: var(--text-muted); flex-shrink: 0; }

#cmd-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
}

#cmd-input::placeholder { color: var(--text-dim); }

.cmd-esc {
  padding: 0.2rem 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 0.7rem;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
}

.cmd-results { max-height: 380px; overflow-y: auto; padding: 0.5rem; }

.cmd-section-header {
  padding: 0.4rem 0.75rem 0.2rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  font-weight: 600;
}

.cmd-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.cmd-item:hover, .cmd-item.focused {
  background: var(--accent-soft);
  color: var(--text);
}

.cmd-item svg { color: var(--text-dim); flex-shrink: 0; }

.cmd-empty {
  padding: 2rem;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.875rem;
}

/* ════════════════════════════════════════════
   BACK TO TOP
════════════════════════════════════════════ */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px var(--accent-glow);
  transition: all var(--transition);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  z-index: 500;
}

#back-to-top.visible {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

#back-to-top:hover {
  background: var(--accent-h);
  transform: translateY(-2px);
}

/* ════════════════════════════════════════════
   TOAST
════════════════════════════════════════════ */
#toast-container {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  font-size: 0.875rem;
  color: var(--text);
  animation: toastIn 0.3s ease;
  pointer-events: all;
  min-width: 250px;
  max-width: 420px;
}

.toast.success { border-color: rgba(52,211,153,0.4); }
.toast.error   { border-color: rgba(248,113,113,0.4); }

@keyframes toastIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* ════════════════════════════════════════════
   BLOG PAGE
════════════════════════════════════════════ */
.blog-page { padding-top: 6rem; min-height: 100vh; }

.blog-hero {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3rem;
}

.blog-search-wrap {
  position: relative;
  max-width: 480px;
  margin-top: 1.5rem;
}

.blog-search-wrap svg {
  position: absolute;
  left: 1rem; top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  pointer-events: none;
}

#blog-search {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

#blog-search::placeholder { color: var(--text-dim); }
#blog-search:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.blog-categories {
  display: flex; gap: 0.5rem; flex-wrap: wrap;
  margin-bottom: 2rem;
}

.blog-cat-btn {
  padding: 0.35rem 0.9rem;
  border-radius: 100px;
  font-size: 0.78rem; font-weight: 600;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.blog-cat-btn:hover, .blog-cat-btn.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.blog-list { display: flex; flex-direction: column; gap: 1rem; }

.blog-list-card {
  display: flex;
  gap: 1.5rem;
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  cursor: pointer;
  align-items: flex-start;
}

.blog-list-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
  transform: translateX(4px);
}

.blog-list-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--bg-elevated);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: -0.05em;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 0.2rem;
  min-width: 2.5rem;
}

.blog-list-content { flex: 1; }

.blog-list-card h3 {
  font-size: 1.1rem; font-weight: 700;
  color: var(--text); letter-spacing: -0.02em;
  margin-bottom: 0.4rem; line-height: 1.4;
}

.blog-list-card p {
  font-size: 0.875rem; color: var(--text-muted);
  line-height: 1.65; margin-bottom: 0.75rem;
}

.blog-list-footer {
  display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap;
}

/* ════════════════════════════════════════════
   POST PAGE
════════════════════════════════════════════ */
.post-page { padding-top: 5rem; }

.post-header {
  padding: 4rem 0 3rem;
  max-width: 760px;
  margin: 0 auto;
}

.post-meta {
  display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.post-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800; letter-spacing: -0.04em;
  line-height: 1.2; margin-bottom: 1rem;
}

.post-excerpt {
  font-size: 1.1rem; color: var(--text-muted);
  line-height: 1.75; max-width: 620px;
}

.post-layout {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 4rem;
  max-width: 1000px;
  margin: 0 auto;
  padding-bottom: 6rem;
}

.post-content {
  max-width: 680px;
}

.post-content h1, .post-content h2, .post-content h3 {
  font-weight: 700; letter-spacing: -0.03em; color: var(--text);
  margin-top: 2.5rem; margin-bottom: 1rem; line-height: 1.3;
}

.post-content h1 { font-size: 1.75rem; }
.post-content h2 { font-size: 1.4rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--border); }
.post-content h3 { font-size: 1.15rem; }

.post-content p { color: var(--text-muted); line-height: 1.85; margin-bottom: 1.25rem; font-size: 0.975rem; }

.post-content a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

.post-content ul, .post-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
  color: var(--text-muted);
}

.post-content li { margin-bottom: 0.5rem; font-size: 0.975rem; line-height: 1.75; }
.post-content ul li { list-style: disc; }
.post-content ol li { list-style: decimal; }

.post-content blockquote {
  padding: 1rem 1.5rem;
  border-left: 3px solid var(--accent);
  background: var(--bg-card);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1.5rem 0;
  color: var(--text-muted);
  font-style: italic;
}

.post-content code {
  padding: 0.15em 0.4em;
  background: var(--bg-elevated);
  border-radius: 5px;
  font-size: 0.875em;
  color: var(--cyan);
}

.post-content pre {
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.5rem 0;
  position: relative;
}

.post-content pre code {
  padding: 0; background: transparent; color: var(--text); font-size: 0.875rem;
}

.copy-code-btn {
  position: absolute; top: 0.75rem; right: 0.75rem;
  padding: 0.25rem 0.6rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-dim);
  font-size: 0.72rem; font-weight: 500;
  cursor: pointer; transition: all var(--transition);
}

.copy-code-btn:hover { color: var(--text); border-color: var(--border-hover); }

/* Table of Contents */
.toc {
  position: sticky;
  top: 6rem;
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  max-height: calc(100vh - 8rem);
  overflow-y: auto;
}

.toc-title {
  font-size: 0.75rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--text-dim); margin-bottom: 0.9rem;
}

.toc-list { display: flex; flex-direction: column; gap: 0.1rem; }

.toc-item {
  display: block;
  padding: 0.3rem 0.5rem;
  font-size: 0.8rem; color: var(--text-dim);
  border-radius: 6px;
  transition: all var(--transition);
  border-left: 2px solid transparent;
}

.toc-item:hover { color: var(--text-muted); }
.toc-item.active { color: var(--accent); border-left-color: var(--accent); background: var(--accent-soft); }

.toc-item.toc-h3 { padding-left: 1.1rem; font-size: 0.76rem; }

/* ════════════════════════════════════════════
   MOBILE NAV MENU
════════════════════════════════════════════ */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(8,8,15,0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    z-index: 800;
  }

  [data-theme="light"] .nav-links {
    background: rgba(248,248,252,0.97);
  }

  .nav-links.open { display: flex; }

  .nav-link { font-size: 1.35rem; padding: 0.5rem 1.5rem; }

  .hamburger { display: flex; z-index: 901; }

  body.nav-open .hamburger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  body.nav-open .hamburger span:nth-child(2) { opacity: 0; }
  body.nav-open .hamburger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

  .stats-grid { grid-template-columns: repeat(2,1fr); }

  .about-grid { grid-template-columns: 1fr; gap: 2rem; }

  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }

  .post-layout { grid-template-columns: 1fr; }

  .toc { display: none; }

  .timeline { padding-left: 2rem; }

  .timeline-dot { left: -2rem; width: 12px; height: 12px; }

  .timeline::before { left: 5px; }

  .timeline-top { flex-direction: column; gap: 0.4rem; }

  .form-row { grid-template-columns: 1fr; }

  #hero { padding: 7rem 1.5rem 4rem; min-height: auto; }

  .hero-name { font-size: 2.2rem; }

  .section { padding: 4.5rem 0; }

  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; }
  .btn { justify-content: center; width: 100%; }
  .stat-item { padding: 0.75rem; }
  .stat-number { font-size: 1.4rem; }
}

/* ════════════════════════════════════════════
   SCROLLBAR
════════════════════════════════════════════ */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 100px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* ════════════════════════════════════════════
   SELECTION
════════════════════════════════════════════ */
::selection { background: var(--accent-soft); color: var(--accent); }