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

:root {
  --bg: #ffffff;
  --surface: #f8f9fa;
  --card: #ffffff;
  --border: #e8eaed;
  --text: #202124;
  --text-muted: #5f6368;
  --accent: #1a73e8;
  --accent-hover: #1557b0;
  --accent-light: #e8f0fe;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 6px rgba(0,0,0,.05), 0 10px 15px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 25px rgba(0,0,0,.08), 0 20px 40px rgba(0,0,0,.04);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.35s cubic-bezier(.22,1,.36,1);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

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

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #dadce0; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #bdc1c6; }

/* ─── Cursor Glow ─── */
#cursor-glow {
  position: fixed;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26,115,232,.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  transition: opacity .3s;
}

/* ─── Nav ─── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,.8);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
nav.scrolled { border-color: var(--border); }

nav .logo {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -.02em;
}
nav .logo span { color: var(--accent); }

nav .nav-links { display: flex; gap: 2rem; list-style: none; }
nav .nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: .9rem;
  font-weight: 500;
  position: relative;
  padding: .25rem 0;
  transition: color .2s;
}
nav .nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width .3s;
  border-radius: 1px;
}
nav .nav-links a:hover { color: var(--text); }
nav .nav-links a:hover::after { width: 100%; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  color: var(--text);
  cursor: pointer;
  padding: .25rem;
}

/* ─── Sections ─── */
section { position: relative; z-index: 1; }
.section-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ─── Hero ─── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 7rem 2rem 4rem;
  position: relative;
}
.hero .section-inner { width: 100%; }

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.hero-content { position: relative; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--accent-light);
  color: var(--accent);
  font-size: .8rem;
  font-weight: 600;
  padding: .35rem .9rem;
  border-radius: 999px;
  margin-bottom: 1.2rem;
  opacity: 0;
  animation: fadeUp .6s .1s forwards;
}
.hero-badge .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #34a853;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .5; transform: scale(.8); }
}

.hero h1 {
  font-size: clamp(2.6rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.1;
  margin-bottom: .75rem;
  opacity: 0;
  animation: fadeUp .6s .2s forwards;
}
.hero h1 span {
  background: linear-gradient(135deg, var(--accent), #34a853);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 480px;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeUp .6s .3s forwards;
}
.hero-actions {
  display: flex;
  gap: .8rem;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp .6s .4s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .7rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: .9rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all .25s;
  position: relative;
  overflow: hidden;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  transform: translateY(-2px);
}

.btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,.3);
  transform: scale(0);
  animation: rippleAnim .6s ease-out;
  pointer-events: none;
}
@keyframes rippleAnim { to { transform: scale(4); opacity: 0; } }

/* Hero Visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}
.hero-avatar-wrap {
  position: relative;
  width: clamp(200px, 20vw, 300px);
  height: clamp(200px, 20vw, 300px);
}
.hero-avatar {
  width: 100%; height: 100%;
  border-radius: 50%;
  object-fit: cover;
  position: relative;
  z-index: 2;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  animation: fadeUp .8s .3s forwards;
}
.hero-ring {
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 2px solid var(--border);
  animation: spin-slow 20s linear infinite;
  z-index: 1;
}
.hero-ring:nth-child(3) {
  inset: -24px;
  border-style: dashed;
  animation-duration: 30s;
  animation-direction: reverse;
}
@keyframes spin-slow { to { transform: rotate(360deg); } }

.hero-avatar-glow {
  position: absolute;
  inset: -30px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26,115,232,.15) 0%, transparent 70%);
  z-index: 0;
  animation: pulse-glow 3s ease-in-out infinite;
}
@keyframes pulse-glow {
  0%, 100% { transform: scale(1); opacity: .5; }
  50% { transform: scale(1.08); opacity: 1; }
}

/* ─── Social Bar ─── */
.hero-socials {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  opacity: 0;
  animation: fadeUp .6s .5s forwards;
}
.hero-socials a {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  text-decoration: none;
  transition: all .25s;
  font-size: 1rem;
}
.hero-socials a:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
  transform: translateY(-3px);
}

/* ─── Global Animations ─── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Section Header ─── */
.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -.02em;
}
.section-header p {
  color: var(--text-muted);
  margin-top: .5rem;
  font-size: 1rem;
}
.section-header .bar {
  width: 40px; height: 4px;
  background: var(--accent);
  border-radius: 2px;
  margin: 1rem auto 0;
}

/* ─── About ─── */
#about { padding: 6rem 0; background: var(--surface); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.about-text p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.8;
}
.about-text p + p { margin-top: 1rem; }

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  transition: all .3s;
}
.stat-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.stat-card .num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
}
.stat-card .label {
  font-size: .8rem;
  color: var(--text-muted);
  margin-top: .2rem;
}

/* ─── Services ─── */
#services { padding: 6rem 0; background: var(--bg); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.service-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: all .3s;
}
.service-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.service-icon {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  color: var(--accent);
  font-size: 1.2rem;
}
.service-card h3 { font-size: 1.05rem; margin-bottom: .6rem; }
.service-card p {
  font-size: .88rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ─── Skills ─── */
#skills { padding: 6rem 0; }

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .75rem;
}
.skill-chip {
  padding: .5rem 1.2rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg);
  font-size: .85rem;
  font-weight: 500;
  transition: all .25s;
  cursor: default;
  user-select: none;
}
.skill-chip:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ─── Projects ─── */
#projects { padding: 6rem 0; background: var(--surface); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}
.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: all .35s cubic-bezier(.22,1,.36,1);
  position: relative;
  cursor: default;
}
.project-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.project-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, transparent 40%, rgba(26,115,232,.04) 60%, transparent 80%);
  opacity: 0;
  transition: opacity .4s;
  pointer-events: none;
}
.project-card:hover::after { opacity: 1; }

.project-card .card-top {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: .75rem;
}
.project-card .card-top .icon {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: .95rem;
  flex-shrink: 0;
}
.project-card .card-top .lang-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.project-card h3 { font-size: 1rem; font-weight: 600; }
.project-card p {
  font-size: .88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.project-card .meta {
  display: flex;
  gap: 1rem;
  font-size: .78rem;
  color: var(--text-muted);
}
.project-card .meta span { display: inline-flex; align-items: center; gap: 4px; }
.project-card .links {
  margin-top: 1rem;
  display: flex;
  gap: 1rem;
  padding-top: .75rem;
  border-top: 1px solid var(--border);
}
.project-card .links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: .83rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: color .2s;
}
.project-card .links a:hover { color: var(--accent); }

.projects-loading {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
}
.projects-loading i { font-size: 1.5rem; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.projects-prompt {
  grid-column: 1 / -1;
  text-align: center;
  padding: 2rem;
}
.projects-prompt .input-group {
  display: inline-flex;
  gap: .5rem;
  margin-top: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}
.projects-prompt input {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 999px;
  padding: .65rem 1.2rem;
  font-size: .9rem;
  font-family: inherit;
  color: var(--text);
  outline: none;
  width: 240px;
  transition: border-color .2s;
}
.projects-prompt input:focus { border-color: var(--accent); }
.projects-prompt button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: .65rem 1.5rem;
  font-weight: 600;
  font-size: .9rem;
  cursor: pointer;
  font-family: inherit;
  transition: background .2s;
}
.projects-prompt button:hover { background: var(--accent-hover); }

/* ─── Contact ─── */
#contact { padding: 6rem 0; }

.contact-card {
  max-width: 520px;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  text-align: center;
}
.contact-card .icon {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  color: var(--accent);
  font-size: 1.3rem;
}
.contact-card h3 { margin-bottom: .5rem; }
.contact-card p { color: var(--text-muted); font-size: .92rem; margin-bottom: 1.5rem; }
.contact-card .btn { font-size: .95rem; }

/* ─── Footer ─── */
footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-size: .85rem;
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
}
footer .heart { color: #ea4335; }

/* ─── 3D Tilt ─── */
.tilt-3d {
  transform-style: preserve-3d;
  will-change: transform;
  perspective: 800px;
}
.tilt-3d .tilt-content {
  transform-style: preserve-3d;
  transition: transform .15s ease;
}
.tilt-3d .tilt-float {
  transform: translateZ(20px);
}
.tilt-3d .tilt-float-2 {
  transform: translateZ(40px);
}

/* ─── Title 3D ─── */
.hero-content {
  perspective: 800px;
}
.hero-title-3d {
  display: block;
  transform-origin: center center;
  transition: transform .15s cubic-bezier(.22,1,.36,1);
  will-change: transform;
}

/* ─── Avatar 3D ─── */
.avatar-3d-wrap {
  perspective: 800px;
}
.avatar-3d-wrap .hero-avatar {
  transition: transform .3s cubic-bezier(.22,1,.36,1);
  transform-style: preserve-3d;
}

/* ─── Image Reveal ─── */
.img-reveal {
  position: relative;
  overflow: hidden;
}
.img-reveal::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-light);
  transform: translateX(0);
  transition: transform 1s cubic-bezier(.22,1,.36,1);
  z-index: 3;
}
.img-reveal.revealed::after {
  transform: translateX(105%);
}

/* ─── Card 3D glow ─── */
.project-card .card-glow {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(circle at var(--mx) var(--my), rgba(26,115,232,.1), transparent 60%);
  opacity: 0;
  transition: opacity .4s;
  pointer-events: none;
  z-index: 1;
}
.project-card:hover .card-glow { opacity: 1; }

/* ─── Reveal ─── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ─── Section highlight on scroll ─── */
@keyframes section-glow {
  0% { box-shadow: inset 0 0 0 0 rgba(26,115,232,0); }
  50% { box-shadow: inset 0 0 40px 4px rgba(26,115,232,.06); }
  100% { box-shadow: inset 0 0 0 0 rgba(26,115,232,0); }
}
section.highlight {
  animation: section-glow .8s ease-out;
}

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .5s ease, transform .5s ease;
}
.reveal-stagger.visible > *:nth-child(1)  { transition-delay: .05s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(2)  { transition-delay: .1s;  opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(3)  { transition-delay: .15s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(4)  { transition-delay: .2s;  opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(5)  { transition-delay: .25s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(6)  { transition-delay: .3s;  opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(7)  { transition-delay: .35s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(8)  { transition-delay: .4s;  opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(9)  { transition-delay: .45s; opacity: 1; transform: translateY(0); }
.reveal-stagger.visible > *:nth-child(10) { transition-delay: .5s;  opacity: 1; transform: translateY(0); }

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2rem; text-align: center; }
  .hero p { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-socials { justify-content: center; }
  .hero-visual { order: -1; }
  .hero-avatar-wrap { width: 160px; height: 160px; }
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .services-grid { grid-template-columns: 1fr; }

  nav .nav-links {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--bg);
    flex-direction: column;
    padding: 1rem 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
  }
  nav .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
}

@media (max-width: 480px) {
  .section-inner { padding: 0 1.2rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr; }
}