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

:root {
  --bg:       #0f1117;
  --bg2:      #161b27;
  --bg3:      #1e2535;
  --border:   #2a3145;
  --accent:   #6c63ff;
  --accent2:  #a78bfa;
  --text:     #e2e8f0;
  --muted:    #8892a4;
  --success:  #34d399;
  --radius:   12px;
  --shadow:   0 4px 24px rgba(0,0,0,0.4);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: inherit; text-decoration: none; }
strong { color: #fff; }

/* ===== LAYOUT ===== */
.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }
.page { display: none; flex: 1; }
.page.active { display: block; }
.page-wrap { padding: 5rem 1.5rem 6rem; max-width: 1100px; margin: 0 auto; }
.page-sub { color: var(--muted); margin-bottom: 3rem; font-size: 1.05rem; }

/* ===== HEADER / NAV ===== */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 17, 23, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.navbar {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: #fff;
  letter-spacing: -0.5px;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 0.5rem;
}

.nav-link {
  padding: 0.45rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  color: var(--muted);
  font-size: 0.95rem;
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover { color: var(--text); background: var(--bg3); }
.nav-link.active { color: #fff; background: var(--accent); }

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

.lang-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 0.3rem 0.65rem;
  border-radius: 6px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.lang-toggle:hover {
  color: var(--text);
  border-color: var(--accent);
  background: var(--bg3);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

/* mobile menu */
.mobile-menu {
  display: none;
  flex-direction: column;
  padding: 0.5rem 1.5rem 1rem;
  gap: 0.25rem;
  border-top: 1px solid var(--border);
}
.mobile-menu.open { display: flex; }
.mobile-link {
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  color: var(--muted);
  font-size: 0.95rem;
  transition: color 0.2s, background 0.2s;
}
.mobile-link:hover { color: var(--text); background: var(--bg3); }
.mobile-link.active { color: #fff; background: var(--accent); }

/* ===== SECTION TITLE ===== */
.section-title {
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 2.5rem;
  position: relative;
  display: inline-block;
}
.section-title::after {
  content: '';
  display: block;
  height: 3px;
  width: 48px;
  background: var(--accent);
  border-radius: 2px;
  margin-top: 6px;
}

/* ===== HERO ===== */
.hero {
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1.5rem;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(108,99,255,0.15) 0%, transparent 70%);
}

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

.hero-content {
  animation: heroFadeUp 0.75s ease both;
}
@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: -1px;
  line-height: 1.1;
}

.role {
  margin-top: 0.75rem;
  font-size: 1.2rem;
  color: var(--accent2);
  font-weight: 500;
}

.tagline {
  margin: 1.25rem 0 2rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-btns { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ===== BUTTONS ===== */
.btn {
  padding: 0.7rem 1.6rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform 0.15s, opacity 0.15s, box-shadow 0.15s;
}
.btn:hover { transform: translateY(-2px); opacity: 0.92; }
.btn:active { transform: translateY(0); }
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(108,99,255,0.4);
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent2); }
.btn-full { width: 100%; justify-content: center; }

/* ===== ABOUT ===== */
.about {
  padding: 5rem 0;
  background: var(--bg2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.about-grid {
  display: grid;
  grid-template-columns: 220px 1fr 280px;
  gap: 2.5rem;
  align-items: center;
}

.about-photo {
  position: sticky;
  top: 88px;
  align-self: start;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 3 / 4;
}
.profile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}


.about-text p { color: var(--muted); margin-bottom: 1rem; }

.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.75rem;
}
.info-item {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.info-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.badge-available {
  display: inline-block;
  background: rgba(52,211,153,0.15);
  color: var(--success);
  border: 1px solid rgba(52,211,153,0.3);
  border-radius: 20px;
  padding: 0.15rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 600;
}

.skills-panel {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}
.skills-panel h3 { color: #fff; font-size: 1rem; margin-bottom: 1.25rem; }
.skill-group { margin-bottom: 1.25rem; }
.skill-group:last-child { margin-bottom: 0; }
.skill-group h4 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 0.6rem; }

.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag {
  background: rgba(108,99,255,0.15);
  color: var(--accent2);
  border: 1px solid rgba(108,99,255,0.3);
  border-radius: 20px;
  padding: 0.2rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 500;
}

/* ===== EXPERIENCE ===== */
.experience { padding: 5rem 0; }

.timeline { position: relative; padding-left: 1.5rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.timeline-item { position: relative; margin-bottom: 2.5rem; padding-left: 1.75rem; }
.timeline-item:last-child { margin-bottom: 0; }

.timeline-extra {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.3s ease;
  opacity: 0;
  /* compensate so the absolutely-positioned tl-dot isn't clipped */
  margin-left: -2rem;
  padding-left: 2rem;
}
.timeline-extra.open {
  max-height: 600px;
  opacity: 1;
}

.exp-toggle-wrap {
  margin-top: 2rem;
  text-align: center;
}
.exp-toggle {
  font-size: 0.9rem;
  padding: 0.5rem 1.5rem;
}

.tl-dot {
  position: absolute;
  left: -1.5rem;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 2px var(--accent);
}

.tl-content {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}

.tl-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.tl-header h3 { font-size: 1rem; color: #fff; }
.company { font-size: 0.85rem; color: var(--accent2); margin-top: 2px; }
.period {
  font-size: 0.8rem;
  color: var(--muted);
  background: var(--bg3);
  padding: 0.2rem 0.65rem;
  border-radius: 20px;
  white-space: nowrap;
}
.tl-content > p { color: var(--muted); font-size: 0.93rem; }

/* ===== EDUCATION ===== */
.education {
  padding: 5rem 0;
  background: var(--bg2);
  border-top: 1px solid var(--border);
}

.edu-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.edu-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  transition: border-color 0.2s;
}
.edu-icon { font-size: 2rem; line-height: 1; }
.edu-card h3 { font-size: 0.95rem; color: #fff; margin-bottom: 0.3rem; }
.edu-place { font-size: 0.85rem; color: var(--accent2); }
.edu-year { font-size: 0.8rem; color: var(--muted); margin-top: 0.25rem; }

/* ===== WIP BOX ===== */
.wip-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 1rem;
  padding: 5rem 2rem;
  background: var(--bg2);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  max-width: 520px;
  margin: 0 auto;
}
.wip-icon { font-size: 3rem; }
.wip-box h3 { font-size: 1.4rem; color: #fff; }
.wip-box p { color: var(--muted); }

/* ===== PROJECTS ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.project-card.featured { border-color: rgba(108,99,255,0.5); background: rgba(108,99,255,0.05); }

.feat-badge {
  position: absolute;
  top: -1px;
  right: 1.25rem;
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.65rem;
  border-radius: 0 0 6px 6px;
}

.proj-header { display: flex; justify-content: space-between; align-items: center; }
.proj-icon { font-size: 2rem; }
.proj-links { display: flex; gap: 0.5rem; }
.proj-link {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.3rem 0.7rem;
  border-radius: 6px;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--muted);
  transition: color 0.2s, border-color 0.2s;
}
.proj-link:hover { color: var(--text); border-color: var(--muted); }
.proj-link.proj-demo { color: var(--accent2); border-color: rgba(108,99,255,0.3); }
.proj-link.proj-demo:hover { background: rgba(108,99,255,0.15); border-color: var(--accent); }

.project-card h3 { font-size: 1rem; color: #fff; }
.project-card p { color: var(--muted); font-size: 0.9rem; flex: 1; }

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

.contact-info h3 { font-size: 1.2rem; color: #fff; margin-bottom: 0.75rem; }
.contact-info > p { color: var(--muted); margin-bottom: 1.75rem; }

.contact-links { display: flex; flex-direction: column; gap: 0.75rem; }
.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s, transform 0.15s;
}
.contact-item:hover { border-color: var(--accent); transform: translateX(4px); }
.c-icon { font-size: 1.5rem; }
.contact-item div { display: flex; flex-direction: column; gap: 0.15rem; }
.contact-item strong { font-size: 0.9rem; color: #fff; }
.contact-item span { font-size: 0.82rem; color: var(--muted); }

/* ===== FORM ===== */
.contact-form {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label { font-size: 0.85rem; font-weight: 600; color: var(--text); }

.contact-form input,
.contact-form textarea {
  background: var(--bg3);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 0.65rem 0.9rem;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
  resize: vertical;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--muted); }
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108,99,255,0.15);
}

.form-success {
  display: none;
  background: rgba(52,211,153,0.1);
  border: 1px solid rgba(52,211,153,0.3);
  color: var(--success);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  text-align: center;
}
.form-success.show { display: block; }

/* ===== SCROLL ANIMATIONS ===== */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== FOOTER ===== */
footer {
  border-top: 1px solid var(--border);
  padding: 1.75rem 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
  background: var(--bg2);
}

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

  .about-grid { grid-template-columns: 1fr; }
  .about-photo { position: static; aspect-ratio: 1 / 1; max-width: 180px; }
  .contact-grid { grid-template-columns: 1fr; }

  .info-grid { grid-template-columns: 1fr; }

  .edu-grid { grid-template-columns: 1fr; }

  .projects-grid { grid-template-columns: 1fr; }

  .hero-btns { flex-direction: column; align-items: center; }
  .hero-btns .btn { width: 100%; max-width: 280px; }

  .tl-header { flex-direction: column; }

  .page-wrap { padding: 3rem 1.25rem 4rem; }

  .about, .experience, .education { padding: 3.5rem 0; }
}