/* ========================================================
   Portfolio – Light Theme
   ======================================================== */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:          #ffffff;
  --surface:     #f6f8fa;
  --surface-2:   #eaecef;
  --border:      #d0d7de;
  --text:        #1f2328;
  --text-muted:  #57606a;
  --accent:      #0969da;
  --accent-2:    #0550ae;
  --accent-light:#dbeafe;
  --green:       #1a7f37;
  --radius:      10px;
  --shadow-sm:   0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:   0 4px 12px rgba(0,0,0,.1);
  --nav-h:       64px;
  --transition:  .2s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { display: block; max-width: 100%; }

.container {
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: 24px;
}

/* ---------- Navbar ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  height: var(--nav-h);
}

.nav-container {
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -.3px;
}
.logo-bracket { color: var(--accent); }
.logo-accent  { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 32px;
}
.nav-links a {
  font-size: .95rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--accent); text-decoration: none; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}
.btn-primary:hover {
  background: var(--accent-2);
  border-color: var(--accent-2);
  text-decoration: none;
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  text-decoration: none;
}

/* ---------- Section Titles ---------- */
.section-title {
  font-size: 1.8rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 8px;
  letter-spacing: -.5px;
}
.section-sub {
  text-align: center;
  color: var(--text-muted);
  font-size: .97rem;
  margin-bottom: 48px;
}

/* =========================================================
   HERO
   ========================================================= */
.hero {
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 24px 40px;
  background: linear-gradient(160deg, #f0f7ff 0%, #ffffff 60%);
  position: relative;
  overflow: hidden;
}

/* subtle grid pattern */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: .35;
  pointer-events: none;
}

.hero-content {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 28px;
  max-width: 700px;
}

.hero-avatar-wrap {
  position: relative;
  width: 130px;
  height: 130px;
}
.hero-avatar {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--bg);
  box-shadow: 0 0 0 3px var(--accent), var(--shadow-md);
}
.status-dot {
  position: absolute;
  bottom: 6px;
  right: 6px;
  width: 16px;
  height: 16px;
  background: var(--green);
  border: 2px solid var(--bg);
  border-radius: 50%;
}

.hero-greeting {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: -12px;
}
.hero-name {
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 800;
  letter-spacing: -1px;
}
.hero-role {
  font-size: clamp(1rem, 3vw, 1.25rem);
  color: var(--accent);
  font-weight: 600;
  min-height: 32px;
}
.cursor {
  display: inline-block;
  animation: blink 1s step-end infinite;
  color: var(--accent);
}
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

.hero-location {
  font-size: .9rem;
  color: var(--text-muted);
}

.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-scroll {
  position: relative;
  margin-top: 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-size: .8rem;
  color: var(--text-muted);
}
.bounce {
  animation: bounce 1.6s infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(6px); }
}

/* =========================================================
   ABOUT
   ========================================================= */
.about {
  padding: 96px 0;
  background: var(--surface);
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

.about-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.about-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.about-icon {
  font-size: 1.6rem;
  color: var(--accent);
  margin-bottom: 16px;
}
.about-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.about-card p {
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Stats */
.stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.stat-card {
  flex: 1 1 140px;
  max-width: 180px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  transition: box-shadow var(--transition);
}
.stat-card:hover { box-shadow: var(--shadow-md); }
.stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -1px;
}
.stat-label {
  font-size: .8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* =========================================================
   SKILLS
   ========================================================= */
.skills {
  padding: 96px 0;
  background: var(--bg);
}

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.skill-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--text);
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
  cursor: default;
}
.skill-pill:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.skill-pill .fa-js { color: #f7df1e; }
.skill-pill .fa-react { color: #61dafb; }
.skill-pill .fa-node-js { color: #68a063; }
.skill-pill .fa-html5 { color: #e44d26; }
.skill-pill .fa-css3-alt { color: #2965f1; }
.skill-pill .fa-docker { color: #2496ed; }
.skill-pill .fa-git-alt { color: #f05032; }
.ts-icon { font-size: .85rem; font-weight: 700; letter-spacing: .5px; }

/* =========================================================
   PROJECTS
   ========================================================= */
.projects {
  padding: 96px 0;
  background: var(--surface);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

/* Skeleton loaders */
.proj-skeleton {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  height: 180px;
  animation: shimmer 1.4s infinite linear;
  background-image: linear-gradient(
    90deg,
    var(--surface) 0%,
    var(--surface-2) 40%,
    var(--surface) 80%
  );
  background-size: 400% 100%;
}
@keyframes shimmer {
  0%   { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

/* Real project cards */
.proj-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.proj-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.proj-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}
.proj-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  word-break: break-word;
}
.proj-name:hover { text-decoration: underline; }
.proj-fork-badge {
  font-size: .7rem;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
}

.proj-desc {
  font-size: .875rem;
  color: var(--text-muted);
  line-height: 1.6;
  flex: 1;
}

.proj-footer {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.proj-lang {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .8rem;
  color: var(--text-muted);
}
.lang-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.proj-stars, .proj-forks {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: .8rem;
  color: var(--text-muted);
}
.proj-updated {
  font-size: .75rem;
  color: var(--text-muted);
  margin-left: auto;
}

.projects-footer {
  text-align: center;
}

/* =========================================================
   CONTACT
   ========================================================= */
.contact {
  padding: 96px 0;
  background: var(--bg);
}
.contact-inner {
  max-width: 640px;
  text-align: center;
}
.contact-links {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
}
.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .95rem;
  font-weight: 500;
  color: var(--text);
  width: 100%;
  max-width: 400px;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  text-decoration: none;
}
.contact-link:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}
.contact-link i { font-size: 1.1rem; }

/* =========================================================
   FOOTER
   ========================================================= */
.footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  font-size: .85rem;
  color: var(--text-muted);
  background: var(--surface);
}
.footer a { color: var(--text-muted); }
.footer a:hover { color: var(--accent); }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
    box-shadow: var(--shadow-md);
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    padding: 14px 24px;
    border-bottom: 1px solid var(--border);
    font-size: 1rem;
  }
  .nav-links a:last-child { border-bottom: none; }
  .hamburger { display: flex; }

  .hero { padding: 60px 20px 32px; }
  .section-title { font-size: 1.45rem; }

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

  .stats-row { gap: 12px; }
  .stat-card { min-width: 120px; }

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

  .contact-link { max-width: 100%; }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; width: 100%; }
  .btn { justify-content: center; }
}

/* Language color map (common) */
.lang-TypeScript  { background: #3178c6; }
.lang-JavaScript  { background: #f1e05a; }
.lang-Python      { background: #3572A5; }
.lang-HTML        { background: #e34c26; }
.lang-CSS         { background: #563d7c; }
.lang-Shell       { background: #89e051; }
.lang-default     { background: #8b8b8b; }