/* ─────────────────────────────────────────────────────
   Variables
───────────────────────────────────────────────────── */
:root {
  --bg:            #08090b;
  --bg-elevated:   #0e1019;
  --bg-card:       #11141f;
  --bg-card-hover: #151828;

  --border:        rgba(255, 255, 255, 0.07);
  --border-strong: rgba(255, 255, 255, 0.13);

  --text:          #f0f2f8;
  --text-soft:     #b8bdd4;
  --muted:         #717898;
  --subtle:        #484b62;

  --accent:        #60a5fa;
  --accent-soft:   #93c5fd;
  --accent-glow:   rgba(96, 165, 250, 0.18);
  --accent-v:      #a78bfa;
  --accent-v-glow: rgba(167, 139, 250, 0.15);

  --shadow-sm:     0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md:     0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg:     0 24px 64px rgba(0, 0, 0, 0.55);
  --shadow-glow:   0 0 0 1px var(--border-strong), 0 20px 60px -20px var(--accent-glow);

  --r-sm:   8px;
  --r-md:   14px;
  --r-lg:   22px;
  --r-xl:   28px;
  --r-pill: 999px;

  --space-xs:  8px;
  --space-sm:  14px;
  --space-md:  22px;
  --space-lg:  36px;
  --space-xl:  64px;
  --space-2xl: 104px;

  --font-display: "Bricolage Grotesque", "Plus Jakarta Sans", system-ui, sans-serif;
  --font-body:    "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "SF Mono", Consolas, monospace;

  --ease:     cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast:   180ms;
  --t-med:    320ms;
  --t-slow:   600ms;

  --container-w:   92%;
  --container-max: 1240px;
}

/* ─────────────────────────────────────────────────────
   Reset
───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: auto; }

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.68;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a   { color: inherit; text-decoration: none; }
ul  { list-style: none; }

/* ─────────────────────────────────────────────────────
   Typography
───────────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
}

h1 { font-size: clamp(2.6rem, 7vw + 1rem, 5.6rem); font-weight: 500; }
h2 { font-size: clamp(1.9rem, 4vw + 0.5rem, 3.2rem); font-weight: 500; }
h3 { font-size: clamp(1.1rem, 1.4vw + 0.5rem, 1.45rem); font-weight: 600; }

h2 em {
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
}

p { color: var(--muted); line-height: 1.72; }

.mono { font-family: var(--font-mono); }

/* ─────────────────────────────────────────────────────
   Layout
───────────────────────────────────────────────────── */
.container {
  width: var(--container-w);
  max-width: var(--container-max);
  margin: 0 auto;
}

.section { padding: var(--space-2xl) 0; }
.alt-section { background: var(--bg-elevated); }

.section-head { margin-bottom: var(--space-xl); }

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 5px 13px;
  background: var(--accent-glow);
  border: 1px solid rgba(96, 165, 250, 0.22);
  border-radius: var(--r-pill);
  margin-bottom: var(--space-md);
}

.section-tag .mono { opacity: 0.65; }

/* Tags (pill badges) */
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: var(--space-sm); }

.tags span {
  padding: 5px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-soft);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.tags span:hover {
  border-color: rgba(96, 165, 250, 0.35);
  color: var(--accent-soft);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: var(--r-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  transition: transform var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease),
    background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 18px rgba(96, 165, 250, 0.38);
}

.btn-primary:hover { box-shadow: 0 8px 28px rgba(96, 165, 250, 0.52); }

.btn-ghost {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  color: var(--text-soft);
}

.btn-ghost:hover { border-color: rgba(96, 165, 250, 0.4); color: var(--text); }

/* ─────────────────────────────────────────────────────
   Navbar
───────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(8, 9, 11, 0.0);
  border-bottom: 1px solid transparent;
  transition:
    background var(--t-med) var(--ease),
    border-color var(--t-med) var(--ease),
    box-shadow var(--t-med) var(--ease),
    padding var(--t-med) var(--ease);
}

.navbar.is-scrolled {
  background: rgba(8, 9, 11, 0.88);
  border-bottom-color: var(--border);
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: var(--space-lg);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #fff;
  background: var(--accent);
  padding: 4px 11px;
  border-radius: var(--r-sm);
  transition: opacity var(--t-fast) var(--ease);
}

.nav-logo:hover { opacity: 0.82; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  border-radius: var(--r-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--muted);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.nav-link:hover { color: var(--text); background: var(--border); }

.nav-link.is-active { color: var(--accent); background: var(--accent-glow); }

.nav-num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--subtle);
  transition: color var(--t-fast) var(--ease);
}

.nav-link.is-active .nav-num { color: var(--accent); opacity: 0.7; }

/* Hamburger */
.menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  padding: 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 101;
}

.bar {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform var(--t-med) var(--ease), opacity var(--t-med) var(--ease);
}

.menu-btn.is-open .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-btn.is-open .bar:nth-child(2) { opacity: 0; transform: scaleX(0); }
.menu-btn.is-open .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─────────────────────────────────────────────────────
   Hero
───────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 0 var(--space-2xl);
  overflow: hidden;
}

/* Dot grid with radial fade */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.032) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 0%, black 20%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 0%, black 20%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}

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

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
}

.orb-a {
  width: 560px;
  height: 560px;
  top: -200px;
  right: -80px;
  background: radial-gradient(circle at center, rgba(96, 165, 250, 0.17) 0%, transparent 70%);
  animation: float 14s var(--ease) infinite alternate;
}

.orb-b {
  width: 400px;
  height: 400px;
  bottom: 0;
  left: 2%;
  background: radial-gradient(circle at center, rgba(167, 139, 250, 0.11) 0%, transparent 70%);
  animation: float 18s var(--ease) infinite alternate-reverse;
  animation-delay: -7s;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-left { max-width: 620px; }

/* Badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  background: var(--accent-glow);
  border: 1px solid rgba(96, 165, 250, 0.24);
  border-radius: var(--r-pill);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--accent-soft);
  letter-spacing: 0.03em;
  margin-bottom: var(--space-md);
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #4ade80;
  flex-shrink: 0;
  animation: pulse 2.4s ease-in-out infinite;
}

.hero-role {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--muted);
  margin-bottom: var(--space-sm);
  letter-spacing: 0;
}

.prompt {
  color: var(--accent);
  margin-right: 6px;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--muted);
  line-height: 1.76;
  max-width: 500px;
  margin-bottom: var(--space-lg);
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* Stats */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  gap: 0;
}

.stat {
  padding: 0 var(--space-md);
  border-right: 1px solid var(--border);
}

.stat:first-child { padding-left: 0; }
.stat:last-child  { border-right: none; }

.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.4;
}

/* Photo */
.hero-right {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.photo-ring {
  position: relative;
  display: inline-flex;
}

/* Gradient arc around photo */
.photo-ring::before {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: conic-gradient(
    from 135deg,
    var(--accent) 0deg,
    var(--accent-v) 120deg,
    transparent 200deg,
    transparent 360deg
  );
  opacity: 0.6;
  z-index: -1;
  transition: opacity var(--t-med) var(--ease);
}

.photo-ring:hover::before { opacity: 1; }

.photo-frame {
  width: 230px;
  height: 230px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--bg-card);
}

.hero-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  filter: brightness(0.88) saturate(0.75);
  transition: filter var(--t-slow) var(--ease);
}

.photo-ring:hover .hero-photo { filter: brightness(0.96) saturate(0.9); }

/* ─────────────────────────────────────────────────────
   About
───────────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

.about-grid p { margin-bottom: var(--space-md); }

/* ─────────────────────────────────────────────────────
   Skills
───────────────────────────────────────────────────── */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.skill-item {
  padding: 18px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  transition: border-color var(--t-fast) var(--ease);
}

.skill-item:hover { border-color: var(--border-strong); }

.skill-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 10px;
  gap: 12px;
}

.skill-name {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-soft);
}

.skill-level {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--subtle);
  white-space: nowrap;
}

.skill-track {
  height: 5px;
  background: var(--bg-elevated);
  border-radius: var(--r-pill);
  overflow: hidden;
}

.skill-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-v));
  border-radius: var(--r-pill);
  box-shadow: 0 0 10px var(--accent-glow);
  transition: width 1.4s var(--ease-out);
}

.skills-tags-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}

.skills-also-label {
  font-size: 0.72rem;
  color: var(--subtle);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  flex-shrink: 0;
}

/* ─────────────────────────────────────────────────────
   Projects
───────────────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.project-card {
  --mx: 50%;
  --my: 50%;
  position: relative;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  isolation: isolate;
  transition:
    border-color var(--t-med) var(--ease),
    transform var(--t-med) var(--ease),
    background var(--t-med) var(--ease),
    box-shadow var(--t-med) var(--ease);
}

/* Spotlight radial gradient follows cursor */
.project-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    500px circle at var(--mx) var(--my),
    var(--accent-glow),
    transparent 40%
  );
  opacity: 0;
  transition: opacity var(--t-med) var(--ease);
  border-radius: inherit;
  z-index: -1;
  pointer-events: none;
}

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

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

.project-top { display: flex; flex-direction: column; gap: 5px; }

.project-tech {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.project-desc {
  font-size: 0.9rem;
  line-height: 1.7;
  flex-grow: 1;
}

.project-desc em { font-style: italic; color: var(--text-soft); }

.project-link {
  align-self: flex-start;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  transition: color var(--t-fast) var(--ease), gap var(--t-fast) var(--ease);
}

.project-link:hover { color: var(--text); }

/* ─────────────────────────────────────────────────────
   Education — Timeline
───────────────────────────────────────────────────── */
.timeline {
  position: relative;
  padding-left: 28px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), rgba(96, 165, 250, 0.05));
}

.tl-item {
  position: relative;
  padding-bottom: var(--space-xl);
}

.tl-item:last-child { padding-bottom: 0; }

.tl-dot {
  position: absolute;
  left: -24px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.16), 0 0 12px rgba(96, 165, 250, 0.45);
  transition: box-shadow var(--t-med) var(--ease);
}

.tl-item:hover .tl-dot {
  box-shadow: 0 0 0 5px rgba(96, 165, 250, 0.22), 0 0 18px rgba(96, 165, 250, 0.6);
}

.tl-date {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.tl-body h3 { margin-bottom: 4px; }

.tl-role {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-soft);
  margin-bottom: 8px;
}

.tl-body p { font-size: 0.9rem; }

/* ─────────────────────────────────────────────────────
   Contact
───────────────────────────────────────────────────── */
.contact-desc {
  max-width: 500px;
  font-size: 1rem;
  margin-bottom: var(--space-xl);
}

.contact-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  transition:
    border-color var(--t-fast) var(--ease),
    transform var(--t-fast) var(--ease),
    background var(--t-fast) var(--ease);
}

.contact-card:hover {
  border-color: rgba(96, 165, 250, 0.35);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.contact-value {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-soft);
}

/* ─────────────────────────────────────────────────────
   Footer
───────────────────────────────────────────────────── */
.footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.footer-inner span {
  font-size: 0.8rem;
  color: var(--subtle);
}

.footer-loc { color: var(--muted); }

/* ─────────────────────────────────────────────────────
   Reveal Animation
───────────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.reveal.is-visible { opacity: 1; transform: translateY(0); }

.reveal[data-delay="1"] { transition-delay: 80ms;  }
.reveal[data-delay="2"] { transition-delay: 160ms; }
.reveal[data-delay="3"] { transition-delay: 240ms; }
.reveal[data-delay="4"] { transition-delay: 320ms; }

/* ─────────────────────────────────────────────────────
   Keyframes
───────────────────────────────────────────────────── */
@keyframes float {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, -30px) scale(1.08); }
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0   rgba(74, 222, 128, 0.5); }
  50%       { box-shadow: 0 0 0 6px rgba(74, 222, 128, 0);   }
}

/* ─────────────────────────────────────────────────────
   Responsive — 540px
───────────────────────────────────────────────────── */
@media (min-width: 540px) {
  .hero-stats { grid-template-columns: repeat(4, 1fr); }
  .contact-row { grid-template-columns: repeat(2, 1fr); }
}

/* ─────────────────────────────────────────────────────
   Responsive — 768px (tablet)
───────────────────────────────────────────────────── */
@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: minmax(280px, 340px) 1fr;
    align-items: start;
  }

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

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

/* ─────────────────────────────────────────────────────
   Responsive — 960px (desktop)
───────────────────────────────────────────────────── */
@media (min-width: 960px) {
  .menu-btn { display: none; }

  .section { padding: 120px 0; }

  .contact-row { grid-template-columns: repeat(4, 1fr); }
}

/* ─────────────────────────────────────────────────────
   Responsive — 1200px
───────────────────────────────────────────────────── */
@media (min-width: 1200px) {
  :root { --container-w: 84%; }
}

/* ─────────────────────────────────────────────────────
   Mobile — max 959px
───────────────────────────────────────────────────── */
@media (max-width: 959px) {
  .menu-btn { display: flex; }

  .nav-links {
    position: fixed;
    inset: 0;
    background: rgba(8, 9, 11, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--t-med) var(--ease);
    z-index: 99;
  }

  .nav-links.is-open {
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link {
    font-size: 1.3rem;
    padding: 10px 20px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .hero-right {
    justify-content: flex-start;
    order: -1;
  }

  .photo-frame { width: 170px; height: 170px; }

  .photo-ring::before { display: none; }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  .stat { border-right: none; padding: 0; }

  .stat:nth-child(odd) { border-right: 1px solid var(--border); padding-right: var(--space-md); }

  .footer-inner { justify-content: center; text-align: center; }
}

/* ─────────────────────────────────────────────────────
   Reduced motion
───────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
  .skill-fill { transition: none; }
}