/* ==========================================================================
   RESET & BASE
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, p, figure { margin: 0; }
img { max-width: 100%; display: block; }
ul { list-style: none; margin: 0; padding: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 14px;
}
.section-label::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--color-accent);
}

.section-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.section-intro {
  color: var(--color-text-muted);
  max-width: 56ch;
  margin-bottom: 48px;
}

section { position: relative; padding-block: clamp(64px, 10vw, 120px); }
.section-alt { background: var(--color-bg-alt); }

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  box-shadow: var(--shadow-accent);
}
.btn-primary:hover { box-shadow: 0 10px 28px rgba(255, 61, 36, 0.35); }

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-strong);
}
.btn-ghost:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* ==========================================================================
   HEADER / NAV
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 78%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), background var(--transition-base);
}
.site-header.is-scrolled { border-bottom-color: var(--color-border); }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 18px;
}

.nav-logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-logo .dot { color: var(--color-accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-text-muted);
  position: relative;
  padding-bottom: 4px;
  transition: color var(--transition-fast);
}
.nav-links a:hover { color: var(--color-text); }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--color-accent);
  transition: right var(--transition-base);
}
.nav-links a:hover::after { right: 0; }

.nav-cta { display: flex; align-items: center; gap: 14px; }

.nav-toggle {
  display: none;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  color: var(--color-text);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  transition: transform var(--transition-base), opacity var(--transition-base);
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  min-height: 88vh;
  display: flex;
  align-items: center;
  padding-block: 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 82% 18%, color-mix(in srgb, var(--color-accent) 16%, transparent), transparent 55%),
    repeating-linear-gradient(115deg, transparent 0 68px, var(--color-border) 68px 69px);
  mask-image: linear-gradient(to bottom, black, transparent 92%);
}

.hero-kicker {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
  margin-bottom: 20px;
}
.hero-kicker .blink {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  margin-right: 8px;
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(255,61,36,0.5); }
  50% { opacity: 0.5; box-shadow: 0 0 0 6px rgba(255,61,36,0); }
}

.hero-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2.6rem, 7vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  max-width: 16ch;
}
.hero-title .accent { color: var(--color-accent); }

.hero-stripe {
  width: 120px;
  height: 6px;
  margin-block: 28px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2));
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--color-text-muted);
  max-width: 56ch;
  margin-bottom: 36px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 56px; }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--color-border);
  max-width: 640px;
}
.hero-meta div { display: flex; flex-direction: column; gap: 4px; }
.hero-meta .value { font-family: var(--font-heading); font-weight: 600; font-size: 1.15rem; }
.hero-meta .label { font-size: 0.8rem; color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.06em; }

/* ==========================================================================
   ABOUT
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: start;
}

.about-text p { color: var(--color-text-muted); margin-bottom: 18px; }
.about-text p:last-child { margin-bottom: 0; }
.about-text strong { color: var(--color-text); font-weight: 600; }

.stack-group { margin-bottom: 28px; }
.stack-group:last-child { margin-bottom: 0; }
.stack-group h3 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: 14px;
}
.chip-row { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  font-size: 0.85rem;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-border-strong);
  color: var(--color-text-muted);
  transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
}
.chip:hover {
  border-color: var(--color-accent);
  color: var(--color-text);
  background: color-mix(in srgb, var(--color-accent) 10%, transparent);
}

/* ==========================================================================
   INTERESTS
   ========================================================================== */
.interests-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.interest-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: transform var(--transition-base), border-color var(--transition-base), background var(--transition-base);
}
.interest-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-strong);
  background: var(--color-surface-hover);
}
.interest-icon {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--color-accent) 14%, transparent);
  color: var(--color-accent);
  margin-bottom: 20px;
}
.interest-icon svg { width: 22px; height: 22px; }
.interest-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.interest-card p { color: var(--color-text-muted); font-size: 0.94rem; }

/* ==========================================================================
   PROJECTS
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.project-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}
.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}

.project-card-top {
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2));
}

.project-card-body { padding: 26px 26px 22px; flex: 1; display: flex; flex-direction: column; }

.project-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.project-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
}

.project-status {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  padding: 3px 10px;
  white-space: nowrap;
}

.project-card p.project-desc {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin-bottom: 20px;
  flex: 1;
}

.project-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.project-tags span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
  padding: 4px 9px;
  border-radius: 4px;
}

.project-links { display: flex; gap: 20px; border-top: 1px solid var(--color-border); padding-top: 16px; }
.project-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}
.project-links a:hover { color: var(--color-accent); }
.project-links svg { width: 15px; height: 15px; }

.projects-more {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  padding: 26px;
  color: var(--color-text-faint);
  font-size: 0.88rem;
  min-height: 100%;
}

/* ==========================================================================
   CONTACT
   ========================================================================== */
.contact-panel {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
}
.contact-panel .section-label { justify-content: center; }
.contact-panel .section-label::before { display: none; }
.contact-panel .section-title { margin-bottom: 16px; }
.contact-panel .section-intro { margin-inline: auto; margin-bottom: 40px; text-align: center; }

.contact-actions { display: flex; justify-content: center; margin-bottom: 44px; }
.contact-actions .btn { padding: 16px 34px; font-size: 1rem; }

.social-row { display: flex; justify-content: center; gap: 18px; }
.social-link {
  width: 46px; height: 46px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--color-border-strong);
  border-radius: 50%;
  color: var(--color-text-muted);
  transition: border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}
.social-link:hover { border-color: var(--color-accent); color: var(--color-accent); transform: translateY(-3px); }
.social-link svg { width: 19px; height: 19px; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: 28px;
}
.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--color-text-faint);
}
.footer-row a:hover { color: var(--color-accent); }

/* ==========================================================================
   REVEAL ON SCROLL
   ========================================================================== */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms ease, transform 700ms cubic-bezier(0.16, 1, 0.3, 1);
}
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 980px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .interests-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .nav-links, .nav-cta .btn-ghost { display: none; }
  .nav-toggle { display: flex; }

  .nav-links.is-open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 24px var(--container-padding) 30px;
  }

  .hero { min-height: auto; padding-block: 56px 48px; }
  .hero-meta { gap: 24px; }

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

  section { padding-block: 56px; }
}

@media (max-width: 420px) {
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { justify-content: center; }
}