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

:root {
  --bg:        #0a0e1a;
  --bg2:       #0f1629;
  --bg3:       #151d35;
  --surface:   #1a2340;
  --border:    #1e2d50;
  --accent:    #64ffda;
  --accent2:   #0e9f7e;
  --text:      #ccd6f6;
  --text-dim:  #8892b0;
  --text-fade: #4a5568;
  --white:     #e6f1ff;
  --font:      'Inter', sans-serif;
  --mono:      'JetBrains Mono', monospace;
  --radius:    12px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow:    0 8px 32px rgba(0,0,0,0.4);
  --glow:      0 0 20px rgba(100,255,218,0.15);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  overflow-x: hidden;
}

::selection { background: rgba(100,255,218,0.2); color: var(--white); }

/* ─── UTILITIES ───────────────────────────────────────────── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 2rem; }
.accent { color: var(--accent); }
.accent-text { color: var(--accent); font-weight: 500; }
.mono { font-family: var(--mono); }
.small { font-size: 0.85rem; }

/* ─── REVEAL ANIMATION ────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── SCROLLBAR ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent2); }

/* ─── NAVBAR ──────────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.2rem 2rem;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}
#navbar.scrolled {
  background: rgba(10, 14, 26, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border);
  padding: 0.8rem 2rem;
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav-links {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  align-items: center;
}
.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.875rem;
  padding: 0.5rem 0.85rem;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
  font-weight: 500;
}
.nav-links a:hover { color: var(--accent); }
.btn-nav {
  background: transparent !important;
  border: 1px solid var(--accent) !important;
  color: var(--accent) !important;
  border-radius: 6px !important;
}
.btn-nav:hover {
  background: rgba(100,255,218,0.1) !important;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: all var(--transition);
}
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  background: transparent;
  border: 1px solid rgba(100,255,218,0.25);
  border-radius: 6px;
  padding: 0.35rem 0.6rem;
  margin-left: 0.5rem;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
}
.lang-toggle .lang-opt {
  color: var(--text-dim);
  transition: color var(--transition);
}
.lang-toggle .lang-sep {
  color: var(--text-dim);
  opacity: 0.4;
}
.lang-toggle .lang-opt.active {
  color: var(--accent);
  font-weight: 600;
}
.lang-toggle:hover {
  border-color: var(--accent);
}

/* ─── HERO ────────────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 6rem 2rem 4rem;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 60% 40%, rgba(100,255,218,0.04) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 20% 80%, rgba(14,159,126,0.06) 0%, transparent 60%);
  pointer-events: none;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(100,255,218,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(100,255,218,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
}
.hero-inner {
  max-width: 1180px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
}
.hero-content {
  max-width: 640px;
  flex: 1 1 auto;
  min-width: 0;
}
.hero-greeting {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}
.hero-name {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}
.hero-title {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 400;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
  line-height: 1.2;
  min-height: 1.2em;
}
.hero-desc {
  max-width: 560px;
  color: var(--text-dim);
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 2.5rem;
}
.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}
.hero-socials {
  display: flex;
  gap: 1.25rem;
}
.hero-socials a {
  color: var(--text-dim);
  transition: color var(--transition), transform var(--transition);
  display: flex;
}
.hero-socials a:hover { color: var(--accent); transform: translateY(-3px); }
.hero-socials svg { width: 22px; height: 22px; }
.hero-ascii {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: clamp(2.2px, 1.24vw, 5.6px);
  line-height: 1.12;
  color: var(--accent);
  opacity: 1;
  white-space: pre;
  user-select: none;
  pointer-events: none;
}
@media (max-width: 900px) {
  .hero-inner { flex-direction: column; gap: 2rem; }
  .hero-content { max-width: 100%; }
  .hero-ascii { font-size: clamp(2.4px, 1.5vw, 3.6px); }
}
.hero-scroll {
  position: absolute;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  writing-mode: vertical-rl;
  color: var(--text-fade);
  font-size: 0.75rem;
  font-family: var(--mono);
  letter-spacing: 0.1em;
}
.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, transparent, var(--accent));
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.1); }
}

/* ─── BUTTONS ─────────────────────────────────────────────── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius);
  text-decoration: none;
  transition: all var(--transition);
  letter-spacing: 0.02em;
}
.btn-primary:hover {
  background: #45ffcb;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(100,255,218,0.3);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 0.85rem 2rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: var(--radius);
  text-decoration: none;
  transition: all var(--transition);
}
.btn-outline:hover {
  background: rgba(100,255,218,0.08);
  transform: translateY(-2px);
}
.btn-large { padding: 1.1rem 2.8rem; font-size: 1rem; }

/* ─── SECTIONS ────────────────────────────────────────────── */
section {
  padding: 7rem 0;
  position: relative;
}
section:nth-child(even) { background: var(--bg2); }

.section-title {
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 3rem;
  letter-spacing: -0.02em;
}
.section-title .accent.mono {
  font-size: 1rem;
  color: var(--accent);
  font-weight: 400;
  display: inline-block;
  margin-right: 0.6rem;
}
.section-sub {
  color: var(--text-dim);
  margin-top: -2rem;
  margin-bottom: 3rem;
  font-size: 1rem;
}

/* ─── ABOUT ───────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 4rem;
  align-items: start;
}
.about-text p {
  color: var(--text-dim);
  margin-bottom: 1.25rem;
  line-height: 1.8;
  font-size: 1.025rem;
}
.about-text strong { color: var(--text); font-weight: 600; }
.about-highlights {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
  margin-top: 1.5rem;
}
.about-highlights li {
  font-family: var(--mono);
  font-size: 0.825rem;
  color: var(--text-dim);
}
.about-card { position: relative; }
.card-inner {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.card-inner::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: calc(var(--radius) + 1px);
  background: linear-gradient(135deg, rgba(100,255,218,0.15), transparent 60%);
  pointer-events: none;
  z-index: -1;
}
.stat { text-align: center; }
.stat-num {
  display: block;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1;
  margin-bottom: 0.4rem;
  font-family: var(--mono);
}
.stat-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  line-height: 1.3;
}

/* ─── TIMELINE ────────────────────────────────────────────── */
.timeline {
  position: relative;
  padding-left: 2rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 12px; bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--border), transparent);
}
.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  padding-left: 2rem;
}
.timeline-dot {
  position: absolute;
  left: -2.45rem;
  top: 0.8rem;
  width: 12px; height: 12px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--bg), 0 0 12px rgba(100,255,218,0.4);
}
.timeline-date {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
  letter-spacing: 0.05em;
}
.timeline-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.timeline-card:hover {
  border-color: rgba(100,255,218,0.3);
  box-shadow: var(--glow);
}
.timeline-header { margin-bottom: 1rem; }
.timeline-header h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.25rem;
}
.timeline-company {
  font-size: 0.875rem;
  color: var(--accent);
  font-weight: 500;
}
.timeline-list {
  list-style: none;
  color: var(--text-dim);
  font-size: 0.925rem;
  line-height: 1.75;
}
.timeline-list li {
  padding-left: 1.2rem;
  position: relative;
  margin-bottom: 0.5rem;
}
.timeline-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.7rem;
  top: 0.35em;
}
.timeline-list strong { color: var(--text); }
.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}
.timeline-tags span {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  background: rgba(100,255,218,0.07);
  border: 1px solid rgba(100,255,218,0.2);
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
}

/* ─── PROJECTS ────────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.project-card:hover {
  transform: translateY(-6px);
  border-color: rgba(100,255,218,0.3);
  box-shadow: var(--shadow), var(--glow);
}
.project-card.featured {
  border-color: rgba(100,255,218,0.2);
}
.project-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}
.project-icon {
  width: 42px; height: 42px;
  color: var(--accent);
}
.project-icon svg { width: 100%; height: 100%; }
.project-badge {
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  background: rgba(100,255,218,0.08);
  border: 1px solid rgba(100,255,218,0.25);
  color: var(--accent);
  white-space: nowrap;
}
.project-badge.award {
  background: rgba(255,215,0,0.07);
  border-color: rgba(255,215,0,0.25);
  color: #ffd700;
}
.project-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--white);
}
.project-card p {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.7;
  flex: 1;
}
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.project-tags span {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
}

/* ─── SKILLS ──────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
}
.skill-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  transition: border-color var(--transition);
}
.skill-group:hover { border-color: rgba(100,255,218,0.25); }
.skill-group h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.skill-pills span {
  font-size: 0.825rem;
  color: var(--text-dim);
  background: rgba(100,255,218,0.05);
  border: 1px solid rgba(100,255,218,0.15);
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  transition: all var(--transition);
}
.skill-pills span:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(100,255,218,0.1);
}

/* ─── EDUCATION ───────────────────────────────────────────── */
.edu-grid {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 3rem;
}
.edu-card {
  display: flex;
  gap: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  align-items: flex-start;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.edu-card:hover {
  border-color: rgba(100,255,218,0.3);
  box-shadow: var(--glow);
}
.edu-year {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  white-space: nowrap;
  min-width: 110px;
  padding-top: 0.25rem;
  letter-spacing: 0.04em;
}
.edu-body h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 0.3rem;
}
.edu-school {
  display: block;
  font-size: 0.875rem;
  color: var(--text-dim);
  margin-bottom: 0.2rem;
}
.edu-location {
  font-family: var(--mono);
  font-size: 0.775rem;
  color: var(--text-fade);
}

/* ─── LANGUAGES ───────────────────────────────────────────── */
.languages-block h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.lang-grid {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.lang-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1.5rem;
}
.lang-flag { font-size: 1.4rem; }
.lang-name {
  font-size: 0.9rem;
  color: var(--text);
  font-weight: 500;
}
.lang-level {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
}
.lang-level.native   { background: rgba(100,255,218,0.1); color: var(--accent); border: 1px solid rgba(100,255,218,0.3); }
.lang-level.advanced { background: rgba(100,180,255,0.1); color: #64b5ff;       border: 1px solid rgba(100,180,255,0.3); }
.lang-level.beginner { background: rgba(255,200,100,0.1); color: #ffc864;       border: 1px solid rgba(255,200,100,0.3); }

/* ─── CONTACT ─────────────────────────────────────────────── */
#contact { text-align: center; }
.contact-content { max-width: 600px; margin: 0 auto; }
.contact-content p {
  font-size: 1.1rem;
  color: var(--text-dim);
  line-height: 1.8;
  margin-bottom: 2.5rem;
}
.contact-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}
.contact-links a {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--transition);
  position: relative;
}
.contact-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform var(--transition);
}
.contact-links a:hover { color: var(--accent); }
.contact-links a:hover::after { transform: scaleX(1); }

/* ─── FOOTER ──────────────────────────────────────────────── */
footer {
  padding: 2rem;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-fade);
}

/* ─── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-card { max-width: 400px; }
  .card-inner { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(10, 14, 26, 0.98); backdrop-filter: blur(12px);
    padding: 1.5rem 2rem; gap: 0.5rem; border-bottom: 1px solid var(--border); }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  #navbar { padding: 1rem 1.5rem; }
  section { padding: 5rem 0; }
  .timeline { padding-left: 1rem; }
  .timeline-item { padding-left: 1.5rem; }
  .card-inner { grid-template-columns: 1fr 1fr; }
  .edu-card { flex-direction: column; gap: 0.75rem; }
  .edu-year { min-width: unset; }
  .hero-scroll { display: none; }
  .projects-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .container { padding: 0 1.25rem; }
  .card-inner { grid-template-columns: 1fr 1fr; }
  .hero-cta { flex-direction: column; }
  .btn-primary, .btn-outline { text-align: center; justify-content: center; }
  .footer-inner { flex-direction: column; text-align: center; }
}