/* =========================================================
   1. DESIGN TOKENS
========================================================= */
:root {
  /* Dark theme*/
  --paper: #0B0D10;
  --surface: #12151A;
  --surface-glass: rgba(255, 255, 255, 0.045);
  --surface-alt: #10131A;
  --ink: #EAECED;
  --ink-soft: #9AA3AD;
  --ink-faint: #6B7682;
  --line: #232A32;
  --line-strong: #34404C;

  --accent: #3FD08F;
  --accent-bright: #5BE8A9;
  --accent-soft: rgba(63, 208, 143, 0.12);
  --accent-ink: #062B1B;

  --glow: rgba(63, 208, 143, 0.35);
  --glow-soft: rgba(63, 208, 143, 0.16);
  --card-shadow: 0 14px 34px rgba(0, 0, 0, 0.35);
  --card-shadow-hover: 0 22px 48px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(63, 208, 143, 0.18);
  --orb-opacity: 1;

  /* Typography */
  --font-display: "Archivo", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Spacing scale (used for paddings/margins/gaps) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  /* Radii */
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  /* Layout */
  --max-width: 1140px;
  --header-height: 68px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 200ms;
  --dur: 300ms;
  --dur-slow: 500ms;
}

[data-theme="light"] {
  --paper: #F7F8F7;
  --surface: #FFFFFF;
  --surface-glass: rgba(255, 255, 255, 0.75);
  --surface-alt: #EFF2EF;
  --ink: #17201C;
  --ink-soft: #57625D;
  --ink-faint: #7C8680;
  --line: #E1E5E1;
  --line-strong: #C4CCC5;

  --accent: #177E56;
  --accent-bright: #177E56;
  --accent-soft: rgba(23, 126, 86, 0.1);
  --accent-ink: #FFFFFF;

  --glow: rgba(23, 126, 86, 0.25);
  --glow-soft: rgba(23, 126, 86, 0.1);
  --card-shadow: 0 10px 26px rgba(20, 40, 32, 0.07);
  --card-shadow-hover: 0 18px 38px rgba(20, 40, 32, 0.12), 0 0 0 1px rgba(23, 126, 86, 0.16);
  --orb-opacity: 0.55;
}

/* =========================================================
   2. RESET & BASE
========================================================= */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 18px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
  overflow-x: hidden;
}

h1, h2, h3, h4 { margin: 0; font-family: var(--font-display); font-weight: 700; letter-spacing: -0.015em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 12px 18px;
  z-index: 300;
  border-radius: 0 0 6px 0;
  font-weight: 600;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

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

/* =========================================================
   3. LAYOUT HELPERS
========================================================= */
.section-inner,
.header-inner,
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: 28px;
  padding-right: 28px;
}

.section { padding: 108px 0; position: relative; }
.section-alt { background: var(--surface-alt); }

.section-head { margin-bottom: 52px; }

.section-head h2 {
  font-size: clamp(1.8rem, 2.6vw, 2.35rem);
}
.section-sub {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 1.02rem;
  max-width: 62ch;
}

.subsection + .subsection { margin-top: 72px; }
.subsection-title { font-size: 1.15rem; margin-bottom: 28px; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================================
   4. BUTTONS & BADGES
========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.2;
  border: 1px solid transparent;
  transition: background-color var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease),
    transform var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: 0 6px 22px var(--glow-soft);
}
.btn-primary:hover {
  background: var(--accent-bright);
  box-shadow: 0 8px 28px var(--glow);
}

.btn-secondary {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ink);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent-bright);
  background: var(--accent-soft);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-soft);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--line-strong); color: var(--ink); }

.btn-sm { padding: 9px 16px; font-size: 0.86rem; border-radius: var(--radius-sm); }

.btn .btn-icon { width: 15px; height: 15px; flex: none; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.82rem;
  padding: 6px 13px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  background: var(--surface-glass);
}
.badge-accent {
  background: var(--accent-soft);
  border-color: transparent;
  color: var(--accent-bright);
  font-weight: 600;
}
.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--glow);
  flex: none;
}

/* =========================================================
   5. HEADER / NAVIGATION
========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--paper);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}
/* Scrolled state (toggled by script.js) */
.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.header-inner {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.wordmark {
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.wordmark em {
  font-style: normal;
  color: var(--accent);
}

.nav-list { display: flex; gap: 28px; }

.nav-link {
  position: relative;
  font-size: 0.9rem;
  color: var(--ink-soft);
  padding: 6px 0;
  transition: color var(--dur-fast) var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease);
}
.nav-link:hover,
.nav-link.is-active { color: var(--ink); }
.nav-link.is-active::after,
.nav-link:hover::after { transform: scaleX(1); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink);
  transition: border-color var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease);
}
.icon-btn:hover { border-color: var(--accent); background: var(--accent-soft); }

.theme-toggle svg {
  grid-area: 1 / 1;
  transition: opacity 0.25s var(--ease), transform 0.35s var(--ease);
}
.icon-moon { opacity: 0; transform: rotate(-90deg) scale(0.6); }
.icon-sun { opacity: 1; transform: rotate(0deg) scale(1); }
[data-theme="light"] .icon-sun { opacity: 0; transform: rotate(90deg) scale(0.6); }
[data-theme="light"] .icon-moon { opacity: 1; transform: rotate(0deg) scale(1); }

.hamburger {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.hamburger span {
  width: 16px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}
.hamburger.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.mobile-nav {
  display: none;
  max-height: 0;
  overflow: hidden;
  /* visibility keeps closed-menu links out of the keyboard tab order */
  visibility: hidden;
  border-top: 1px solid var(--line);
  transition: max-height 0.3s var(--ease), visibility 0.3s;
}
.mobile-nav.is-open {
  max-height: 480px;
  visibility: visible;
}
.mobile-nav ul {
  padding: 8px 28px 20px;
  display: flex;
  flex-direction: column;
}
.mobile-nav .nav-link {
  display: block;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  font-size: 1rem;
}
.mobile-nav .nav-link::after { display: none; }
.mobile-nav .nav-link.is-active { color: var(--accent-bright); }

/* =========================================================
   6. HERO
========================================================= */
.hero {
  position: relative;
  padding: 112px 0 120px;
  overflow: hidden;
  isolation: isolate;
}

/* Animated background*/
.hero-bg { position: absolute; inset: 0; z-index: -1; pointer-events: none; }

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: var(--orb-opacity);
  will-change: transform;
}
.hero-orb-1 {
  width: 560px;
  height: 560px;
  top: -180px;
  right: -120px;
  background: radial-gradient(circle at 30% 30%, var(--glow), transparent 65%);
  animation: orb-drift-a 26s ease-in-out infinite alternate;
}
.hero-orb-2 {
  width: 460px;
  height: 460px;
  bottom: -220px;
  left: -140px;
  background: radial-gradient(circle at 70% 70%, var(--glow-soft), transparent 65%);
  animation: orb-drift-b 32s ease-in-out infinite alternate;
}

@keyframes orb-drift-a {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(-70px, 60px, 0) scale(1.12); }
}
@keyframes orb-drift-b {
  from { transform: translate3d(0, 0, 0) scale(1.05); }
  to   { transform: translate3d(60px, -50px, 0) scale(1); }
}

.hero-grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.32;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 35%, black 25%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 35%, black 25%, transparent 75%);
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
  display: grid;
  grid-template-columns: 1.25fr 0.85fr;
  gap: 72px;
  align-items: center;
}

/* Staged entrance (opacity/transform only — compositor-friendly) */
.hero-text,
.profile-card { opacity: 0; transform: translateY(18px); animation: hero-in 0.7s var(--ease) forwards; }
.profile-card { animation-delay: 0.14s; }
@keyframes hero-in { to { opacity: 1; transform: translateY(0); } }

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.07;
  letter-spacing: -0.02em;
}
.hero-title em {
  font-style: normal;
  background: linear-gradient(92deg, var(--accent) 10%, var(--accent-bright) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-role {
  margin-top: 18px;
  font-size: 1.18rem;
  color: var(--ink);
  max-width: 48ch;
  line-height: 1.5;
  font-weight: 600;
}

.hero-learning {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--accent-bright);
  max-width: 52ch;
}

.hero-intro {
  margin-top: 20px;
  max-width: 58ch;
  font-size: 1.02rem;
  color: var(--ink-soft);
}

.hero-tags {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.hero-tags span {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--ink-soft);
  background: var(--surface-glass);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.hero-tags span:hover {
  color: var(--accent-bright);
  border-color: var(--accent);
}

.hero-actions {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* --- Portrait with gradient ring + glow --- */
.profile-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 18px;
  position: relative;
  box-shadow: var(--card-shadow);
}

.profile-frame {
  position: relative;
  border-radius: 14px;
  padding: 2px;
  background: linear-gradient(135deg, var(--accent) 0%, transparent 40%, transparent 60%, var(--accent) 100%);
  overflow: hidden;
}
.profile-photo {
  width: 100%;
  height: auto;
  border-radius: 12px;
  background: var(--surface-alt);
}

.profile-glow {
  position: absolute;
  inset: -14% -8% auto -8%;
  height: 55%;
  background: radial-gradient(ellipse at center, var(--glow-soft), transparent 70%);
  filter: blur(20px);
  z-index: -1;
  pointer-events: none;
}

.profile-facts {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 11px;
}
.profile-fact {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.87rem;
}
.profile-fact dt { color: var(--ink-faint); margin: 0; }
.profile-fact dd { margin: 0; font-weight: 600; text-align: right; }

/* =========================================================
   7. ABOUT
========================================================= */
.about-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: start;
}

.about-copy { display: grid; gap: 18px; }
.about-lead { font-size: 1.16rem; color: var(--ink); }
.about-copy p:not(.about-lead) { color: var(--ink-soft); }

.about-highlights {
  display: grid;
  gap: 14px;
}
.about-highlight {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.about-highlight:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.about-highlight-icon {
  flex: none;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent-bright);
}
.about-highlight h3 {
  font-size: 0.95rem;
  margin-bottom: 2px;
}
.about-highlight p {
  font-size: 0.85rem;
  color: var(--ink-soft);
  font-family: var(--font-mono);
}

/* =========================================================
   8. EXPERIENCE TIMELINE
========================================================= */
.timeline {
  position: relative;
  padding-left: 36px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent) 0%, var(--line) 85%);
  border-radius: 2px;
}

.timeline-item { position: relative; }
.timeline-item + .timeline-item { margin-top: 28px; }

.timeline-marker {
  position: absolute;
  left: -36px;
  top: 30px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px var(--paper), 0 0 12px var(--glow-soft);
}
.timeline-marker::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.experience-card { padding: 32px 34px; }

.experience-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.experience-header h3 { font-size: 1.2rem; }
.experience-org {
  margin-top: 5px;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 8px;
}
.experience-dates {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-bright);
  background: var(--accent-soft);
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

.experience-list {
  margin-top: 22px;
  display: grid;
  gap: 13px;
}
.experience-list li {
  padding-left: 20px;
  position: relative;
  color: var(--ink-soft);
  font-size: 0.97rem;
}
.experience-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* =========================================================
   9. SKILLS
========================================================= */
.skill-card {
  padding: 26px 28px;
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease);
}
.skill-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--card-shadow);
}
.section-alt .skill-card { background: var(--surface); }

.skill-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 16px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.skill-card-icon {
  flex: none;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent-bright);
}
.skill-card-head h3 { font-size: 0.98rem; }
.skill-card-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  margin-top: 2px;
}

.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-list li {
  font-size: 0.85rem;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: var(--surface-alt);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease),
    background-color var(--dur-fast) var(--ease);
}
.tag-list li:hover {
  color: var(--accent-bright);
  border-color: var(--accent);
  background: var(--accent-soft);
}
.section-alt .tag-list li { background: var(--paper); }

.skill-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 34px;
  padding: 16px 20px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  font-size: 0.84rem;
  color: var(--ink-soft);
}
.skill-legend strong { color: var(--ink); font-weight: 600; }

/* =========================================================
   10. PROJECTS
========================================================= */
.projects-notice {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-bottom: 36px;
  color: var(--ink-soft);
  font-size: 0.97rem;
  max-width: 72ch;
}
.projects-notice svg { flex: none; margin-top: 2px; color: var(--accent-bright); }

/* Filters */
.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}
.filter-btn {
  font-size: 0.85rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-soft);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease),
    background-color var(--dur-fast) var(--ease);
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent-bright); }
.filter-btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
}

/* Featured project — full-width horizontal card */
.project-card {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease);
}
.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: var(--card-shadow-hover);
}

.project-card--featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  border-color: var(--line-strong);
}
.project-card--featured .project-image-wrap {
  aspect-ratio: auto;
  min-height: 100%;
  border-right: 1px solid var(--line);
  border-bottom: none;
}
.project-card--featured .project-body { padding: 36px; }
.project-card--featured .project-title { font-size: 1.45rem; }

.project-flag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-bright);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 12px;
}

.project-image-wrap {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background:
    linear-gradient(135deg, var(--accent-soft), transparent 55%),
    var(--surface-alt);
  border-bottom: 1px solid var(--line);
  position: relative;
}
.project-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}
.project-card:hover .project-image-wrap img { transform: scale(1.035); }

/* Placeholder visual for projects without a screenshot yet */
.project-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--accent);
  opacity: 0.85;
}

.project-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 13px;
  flex: 1;
}

.project-title { font-size: 1.12rem; }

.project-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  width: fit-content;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  background: var(--accent-soft);
  color: var(--accent-bright);
}
.project-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.project-description {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.project-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-faint);
}

.project-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.project-tags span {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  padding: 5px 10px;
  border-radius: 6px;
  background: var(--surface-alt);
  border: 1px solid var(--line);
  color: var(--ink-soft);
}

.project-actions {
  margin-top: auto;
  padding-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* =========================================================
   11. AREAS OF SUPPORT
========================================================= */
.help-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.help-card {
  padding: 26px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease);
}
.help-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--card-shadow);
}
.help-card-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  background: var(--accent-soft);
  color: var(--accent-bright);
  margin-bottom: 16px;
}
.help-card h3 { font-size: 0.99rem; margin-bottom: 7px; }
.help-card p { font-size: 0.88rem; color: var(--ink-soft); }

/* =========================================================
   12. BACKGROUND — EDUCATION TIMELINE + CERTIFICATIONS
========================================================= */
.background-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.background-grid .subsection + .subsection { margin-top: 0; }

.education-card {
  padding: 24px;
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.education-card h4 { margin-top: 14px; font-size: 1.05rem; }
.education-org { margin-top: 6px; color: var(--ink-soft); font-size: 0.92rem; }
.education-dates {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-bright);
}

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

.cert-card { padding: 0; overflow: hidden; }
.cert-card a { display: block; }
.cert-card img {
  width: 100%;
  height: auto;
  border-bottom: 1px solid var(--line);
  transition: transform 0.5s var(--ease);
}
.cert-card a:hover img { transform: scale(1.03); }
.cert-card figcaption { padding: 18px 20px; }
.cert-card h4 { font-size: 0.97rem; }
.cert-card p {
  margin-top: 5px;
  color: var(--ink-soft);
  font-size: 0.83rem;
  font-family: var(--font-mono);
}

/* =========================================================
   13. CONTACT
========================================================= */
.contact-cta {
  text-align: center;
  max-width: 60ch;
  margin: 0 auto 44px;
}
.contact-cta h2 {
  font-size: clamp(1.9rem, 3vw, 2.5rem);
  letter-spacing: -0.02em;
}
.contact-cta p {
  margin-top: 14px;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  max-width: 880px;
  margin: 0 auto;
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 26px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease),
    box-shadow var(--dur-fast) var(--ease);
}
.contact-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--card-shadow);
}
.contact-card-head {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 4px;
  color: var(--accent-bright);
}
.contact-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.contact-value { font-size: 0.98rem; font-weight: 600; overflow-wrap: anywhere; }

/* =========================================================
   14. FOOTER
========================================================= */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 44px 0 64px;
}
.footer-inner {
  display: grid;
  gap: 26px;
}
.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
}
.footer-brand { max-width: 34ch; }
.footer-brand strong { font-size: 1.02rem; }
.footer-brand p {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 0.87rem;
}
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.footer-nav a {
  font-size: 0.87rem;
  color: var(--ink-soft);
  transition: color var(--dur-fast) var(--ease);
}
.footer-nav a:hover { color: var(--accent-bright); }
.footer-social { display: flex; gap: 10px; }
.footer-social .icon-btn { width: 36px; height: 36px; }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--ink-faint);
  font-size: 0.83rem;
}

/* =========================================================
   15. SCROLL TO TOP
========================================================= */
.scroll-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  display: grid;
  place-items: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), border-color 0.2s var(--ease);
  z-index: 90;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18);
}
.scroll-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.scroll-top:hover { border-color: var(--accent); color: var(--accent-bright); }

/* =========================================================
   16. RESPONSIVE
========================================================= */
@media (max-width: 1024px) {
  .hero-inner { gap: 48px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .background-grid { grid-template-columns: 1fr; gap: 64px; }
  .project-card--featured { grid-template-columns: 1fr; }
  .project-card--featured .project-image-wrap {
    aspect-ratio: 16 / 8;
    border-right: none;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 880px) {
  .nav { display: none; }
  .hamburger { display: flex; }
  .mobile-nav { display: block; }

  .hero { padding: 72px 0 84px; }
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .profile-card { max-width: 380px; }

  .card-grid { grid-template-columns: 1fr; }
  .help-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; max-width: 480px; }
  .project-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 36px; }

  .hero { padding: 52px 0 64px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }
  .profile-card { max-width: none; }

  .help-grid { grid-template-columns: 1fr; }
  .experience-card { padding: 24px 20px; }
  .experience-header { flex-direction: column; align-items: flex-start; }
  .timeline { padding-left: 28px; }
  .timeline-marker { left: -28px; }

  .project-card--featured .project-body { padding: 24px; }
  .project-card--featured .project-title { font-size: 1.2rem; }
  .footer-bottom { flex-direction: column; }
}

/* =========================================================
   17. REDUCED MOTION
========================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    transition-delay: 0ms !important;
    scroll-behavior: auto !important;
  }
  .hero-orb { animation: none !important; }
  .js .reveal { opacity: 1 !important; transform: none !important; }
  .hero-text, .profile-card { opacity: 1 !important; transform: none !important; animation: none !important; }
}