:root {
  --bg: #f3f6fb;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-solid: #ffffff;
  --text: #0f1c2e;
  --muted: #5a6b82;
  --faint: #8a9bb0;
  --line: rgba(15, 40, 70, 0.1);
  --line-strong: rgba(15, 40, 70, 0.16);
  --accent: #0f766e;
  --accent-bright: #14b8a6;
  --accent-soft: rgba(20, 184, 166, 0.12);
  --accent-glow: rgba(20, 184, 166, 0.28);
  --navy: #12305a;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  font-family: "Noto Sans SC", "DM Sans", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

.bg-stage {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background: linear-gradient(165deg, #f8fafc 0%, #eef3f9 42%, #e6f0f4 100%);
}

.bg-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(15, 40, 70, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 40, 70, 0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 20%, transparent 75%);
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  will-change: transform;
}

.orb-a {
  width: 420px; height: 420px;
  top: -80px; left: -60px;
  background: radial-gradient(circle, rgba(45, 212, 191, 0.35), transparent 70%);
  animation: floatA 14s ease-in-out infinite;
}

.orb-b {
  width: 380px; height: 380px;
  top: 10%; right: -80px;
  background: radial-gradient(circle, rgba(96, 165, 250, 0.32), transparent 70%);
  animation: floatB 18s ease-in-out infinite;
}

.orb-c {
  width: 460px; height: 460px;
  bottom: 5%; left: 30%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.18), transparent 70%);
  animation: floatC 20s ease-in-out infinite;
}

@keyframes floatA {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 50px) scale(1.08); }
}
@keyframes floatB {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-50px, 30px) scale(1.12); }
}
@keyframes floatC {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -40px); }
}

a { color: inherit; text-decoration: none; }

.wrap {
  position: relative;
  z-index: 2;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 28px 80px;
}

/* ========== Floating Nav ========== */
.nav-shell {
  position: sticky;
  top: 14px;
  z-index: 50;
  padding: 0 8px;
  margin-bottom: 8px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 58px;
  padding: 8px 10px 8px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: transparent;
  transition:
    background 0.4s var(--ease),
    border-color 0.4s var(--ease),
    box-shadow 0.4s var(--ease),
    backdrop-filter 0.4s,
    transform 0.4s var(--ease);
}

.nav.scrolled {
  width: min(880px, 100%);
  margin-left: auto;
  margin-right: auto;
  background: rgba(255, 255, 255, 0.78);
  border-color: rgba(15, 40, 70, 0.08);
  box-shadow:
    0 14px 40px rgba(15, 40, 70, 0.12),
    0 1px 0 rgba(255, 255, 255, 0.85) inset;
  backdrop-filter: blur(20px) saturate(1.3);
  -webkit-backdrop-filter: blur(20px) saturate(1.3);
}

.nav-brand {
  font-family: "DM Sans", sans-serif;
  font-weight: 700;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--accent);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 22px;
  list-style: none;
  font-size: 0.86rem;
  color: var(--muted);
  font-weight: 500;
}

.nav-links a {
  position: relative;
  padding: 6px 2px;
  transition: color 0.25s;
}

.nav-links a:hover,
.nav-links a.active { color: var(--text); }

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-bright));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }

.nav-cta {
  font-size: 0.8rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--navy), var(--accent));
  padding: 10px 18px;
  border-radius: 999px;
  box-shadow: 0 8px 22px rgba(15, 118, 110, 0.28);
  transition: transform 0.3s var(--ease), box-shadow 0.3s;
  white-space: nowrap;
}

.nav-cta:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 14px 32px rgba(15, 118, 110, 0.36);
}

/* Hero */
.hero {
  padding: 56px 0 48px;
  display: grid;
  grid-template-columns: 1.4fr 0.75fr;
  gap: 40px;
  align-items: end;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 18px;
}

.kicker .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-bright);
  box-shadow: 0 0 0 0 var(--accent-glow);
  animation: liveDot 1.8s ease-out infinite;
}

@keyframes liveDot {
  0% { box-shadow: 0 0 0 0 var(--accent-glow); }
  70% { box-shadow: 0 0 0 10px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.hero h1 {
  font-family: "Noto Serif SC", serif;
  font-size: clamp(2.8rem, 6.5vw, 4.6rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--navy);
  margin-bottom: 18px;
}

.hero h1 span {
  background: linear-gradient(120deg, var(--navy) 30%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 540px;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: transform 0.3s var(--ease), box-shadow 0.3s, background 0.3s;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #0d9488);
  box-shadow: 0 10px 28px rgba(15, 118, 110, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 36px rgba(15, 118, 110, 0.4);
}

.btn-ghost {
  color: var(--navy);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  transform: translateY(-3px);
  border-color: var(--accent);
  color: var(--accent);
}

.contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  font-size: 0.9rem;
}

.contact-row a,
.contact-row span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  transition: color 0.2s;
}

.contact-row a:hover { color: var(--accent); }

.contact-row svg {
  width: 15px; height: 15px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.7;
}

.hero-aside {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.meta-card {
  border: 1px solid var(--line);
  background: var(--surface);
  backdrop-filter: blur(12px);
  border-radius: 18px;
  padding: 20px 22px;
  box-shadow: 0 10px 30px rgba(15, 40, 70, 0.05);
  transition: transform 0.4s var(--ease), box-shadow 0.4s;
}

.meta-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px rgba(15, 40, 70, 0.1);
}

.meta-label {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 6px;
  font-weight: 600;
}

.meta-value {
  font-family: "DM Sans", sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
}

.meta-value em {
  font-style: normal;
  color: var(--accent);
}

.value-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 8px 0 36px;
}

.value-card {
  position: relative;
  overflow: hidden;
  padding: 22px 22px 20px;
  border-radius: 18px;
  background: var(--surface-solid);
  border: 1px solid var(--line);
  box-shadow: 0 8px 24px rgba(15, 40, 70, 0.04);
  transition: transform 0.45s var(--ease), box-shadow 0.45s, border-color 0.3s;
}

.value-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-bright));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease);
}

.value-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 44px rgba(15, 40, 70, 0.1);
  border-color: rgba(20, 184, 166, 0.35);
}

.value-card:hover::before { transform: scaleX(1); }

.value-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.value-card p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.65;
}

.value-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 14px;
  font-family: "DM Sans", sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: 16px;
  box-shadow: 0 12px 40px rgba(15, 40, 70, 0.06);
}

.stat {
  background: var(--surface-solid);
  padding: 28px 20px 24px;
  text-align: center;
  transition: background 0.3s;
}

.stat:hover { background: #f0fdfa; }

.stat b {
  display: block;
  font-family: "DM Sans", sans-serif;
  font-size: 2.35rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--navy), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat span {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 500;
}

section {
  padding: 72px 0 8px;
  scroll-margin-top: 96px;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.section-head h2 {
  font-family: "Noto Serif SC", serif;
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--navy);
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.section-head h2 i {
  font-style: normal;
  font-family: "DM Sans", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 700;
}

.section-note {
  font-size: 0.78rem;
  color: var(--faint);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
}

.adv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.adv-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 6px 14px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface-solid);
  transition: transform 0.4s var(--ease), box-shadow 0.4s, border-color 0.3s;
}

.adv-item:hover {
  transform: translateY(-5px);
  border-color: rgba(20, 184, 166, 0.4);
  box-shadow: 0 18px 40px rgba(15, 40, 70, 0.08);
}

.adv-item:last-child { grid-column: 1 / -1; }

.adv-num {
  font-family: "DM Sans", sans-serif;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 700;
  padding-top: 2px;
}

.adv-item p {
  font-size: 0.92rem;
  color: var(--muted);
}

.adv-item strong { color: var(--text); font-weight: 600; }

.exp-list {
  display: flex;
  flex-direction: column;
  position: relative;
}

.exp-list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-bright), var(--line));
  border-radius: 2px;
}

.exp-item {
  position: relative;
  padding: 0 0 40px 48px;
}

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

.exp-item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 10px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
  transition: transform 0.3s, box-shadow 0.3s;
}

.exp-item:hover::before {
  transform: scale(1.15);
  box-shadow: 0 0 0 8px var(--accent-soft);
}

.exp-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px 16px;
  margin-bottom: 12px;
}

.exp-company {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--navy);
}

.exp-role {
  margin-left: 10px;
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 600;
}

.exp-date {
  font-family: "DM Sans", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  background: #fff;
  border: 1px solid var(--line);
  padding: 5px 12px;
  border-radius: 999px;
  font-weight: 600;
}

.exp-desc ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.exp-desc li {
  position: relative;
  padding-left: 16px;
  color: var(--muted);
  font-size: 0.94rem;
}

.exp-desc li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}

/* Project cards on index — summary style */
.project-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.project-card {
  display: flex;
  flex-direction: column;
  padding: 26px 24px 22px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface-solid);
  transition: transform 0.45s var(--ease), border-color 0.3s, box-shadow 0.45s;
  min-height: 100%;
  box-shadow: 0 8px 24px rgba(15, 40, 70, 0.04);
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: rgba(20, 184, 166, 0.4);
  box-shadow: 0 28px 50px -18px rgba(15, 40, 70, 0.16);
}

.project-card.featured {
  grid-column: 1 / -1;
  padding: 32px 30px 26px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 20px 36px;
  align-items: start;
}

.project-card.featured .tech-stack,
.project-card.featured .project-more {
  grid-column: 1 / -1;
}

.project-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 8px;
}

.project-name {
  font-family: "Noto Serif SC", serif;
  flex: 1;
  min-width: 0;
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.02em;
}

.project-role {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid rgba(20, 184, 166, 0.35);
  background: var(--accent-soft);
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 700;
}

.project-date {
  font-size: 0.78rem;
  color: var(--faint);
  margin-bottom: 10px;
  font-weight: 500;
}

.project-desc {
  font-size: 0.92rem;
  color: var(--muted);
  margin-bottom: 14px;
  line-height: 1.7;
}

.project-highlights {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.86rem;
  color: #4a5d75;
  margin-bottom: 16px;
}

.project-highlights li {
  position: relative;
  padding-left: 16px;
}

.project-highlights li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-bright);
}

.tech-stack {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.tech-tag {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--navy);
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: #f7fafc;
  transition: background 0.25s, border-color 0.25s, color 0.25s;
}

.project-card:hover .tech-tag {
  background: var(--accent-soft);
  border-color: rgba(20, 184, 166, 0.35);
  color: var(--accent);
}

.project-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
  transition: gap 0.3s var(--ease), color 0.2s;
}

.project-card:hover .project-more { gap: 12px; color: var(--navy); }

.project-more svg {
  width: 16px; height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

.edu-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 30px 32px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background:
    linear-gradient(120deg, rgba(20, 184, 166, 0.1), transparent 45%),
    var(--surface-solid);
  box-shadow: 0 12px 36px rgba(15, 40, 70, 0.05);
  transition: transform 0.4s var(--ease);
}

.edu-card:hover { transform: translateY(-4px); }

.edu-school {
  font-family: "Noto Serif SC", serif;
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--navy);
}

.edu-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.edu-major { font-size: 0.95rem; color: var(--text); font-weight: 500; }

.edu-tag {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}

footer.site-footer {
  margin-top: 72px;
  padding: 24px 0 8px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--faint);
  font-weight: 500;
}

/* ========== Project detail page ========== */
.detail-hero {
  padding: 40px 0 36px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}

.detail-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 24px;
  transition: color 0.2s, gap 0.3s var(--ease);
}

.detail-back:hover {
  color: var(--accent);
  gap: 12px;
}

.detail-back svg {
  width: 16px; height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.detail-hero h1 {
  font-family: "Noto Serif SC", serif;
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  line-height: 1.2;
}

.detail-lead {
  font-size: 1.08rem;
  color: var(--muted);
  max-width: 720px;
  margin-bottom: 22px;
}

.detail-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
  align-items: start;
}

.detail-main > * + * { margin-top: 40px; }

.detail-block h2 {
  font-family: "Noto Serif SC", serif;
  font-size: 1.45rem;
  color: var(--navy);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.detail-block h2 i {
  font-style: normal;
  font-family: "DM Sans", sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 700;
}

.detail-block p,
.detail-block li {
  color: var(--muted);
  font-size: 0.95rem;
}

.detail-block p + p { margin-top: 12px; }

.phase-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.phase-item {
  padding: 20px 22px;
  border-radius: 16px;
  background: var(--surface-solid);
  border: 1px solid var(--line);
  transition: border-color 0.3s, transform 0.35s var(--ease);
}

.phase-item:hover {
  border-color: rgba(20, 184, 166, 0.35);
  transform: translateX(4px);
}

.phase-item h3 {
  font-size: 1rem;
  color: var(--navy);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.phase-item h3 span {
  font-family: "DM Sans", sans-serif;
  font-size: 0.72rem;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.challenge-grid {
  display: grid;
  gap: 14px;
}

.challenge-card {
  padding: 22px;
  border-radius: 16px;
  background: var(--surface-solid);
  border: 1px solid var(--line);
  box-shadow: 0 8px 24px rgba(15, 40, 70, 0.04);
}

.challenge-card .label-hard {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #b45309;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.challenge-card .label-solve {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(20, 184, 166, 0.3);
  padding: 3px 10px;
  border-radius: 999px;
  margin: 14px 0 10px;
}

.challenge-card h3 {
  font-size: 1.05rem;
  color: var(--navy);
  margin-bottom: 8px;
}

.outcome-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.outcome-list li {
  padding: 18px 20px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.08), transparent 60%), #fff;
  border: 1px solid var(--line);
  font-size: 0.9rem;
  color: var(--text);
  font-weight: 500;
}

.detail-side {
  position: static;
}

.side-card {
  padding: 22px;
  border-radius: 18px;
  background: var(--surface-solid);
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(15, 40, 70, 0.05);
  margin-bottom: 14px;
}

.side-card h3 {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 12px;
  font-weight: 700;
}

.side-card .side-value {
  font-size: 0.95rem;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 6px;
}

.side-card .side-muted {
  font-size: 0.85rem;
  color: var(--muted);
}

.side-card .tech-stack {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.side-cta {
  display: block;
  text-align: center;
  padding: 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), #0d9488);
  color: #fff;
  font-weight: 600;
  font-size: 0.88rem;
  box-shadow: 0 10px 28px rgba(15, 118, 110, 0.28);
  transition: transform 0.3s var(--ease);
}

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

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

.reveal-left {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal-left.in {
  opacity: 1;
  transform: none;
}

.delay-1 { transition-delay: 0.08s; }
.delay-2 { transition-delay: 0.16s; }
.delay-3 { transition-delay: 0.24s; }
.delay-4 { transition-delay: 0.32s; }

.hero-enter {
  opacity: 0;
  transform: translateY(36px);
  animation: heroIn 0.9s var(--ease) forwards;
}

.hero-enter.d1 { animation-delay: 0.1s; }
.hero-enter.d2 { animation-delay: 0.22s; }
.hero-enter.d3 { animation-delay: 0.34s; }
.hero-enter.d4 { animation-delay: 0.46s; }
.hero-enter.d5 { animation-delay: 0.58s; }

@keyframes heroIn {
  to { opacity: 1; transform: none; }
}

@media (max-width: 900px) {
  .hero,
  .project-grid,
  .adv-grid,
  .value-strip,
  .detail-layout,
  .project-card.featured,
  .outcome-list {
    grid-template-columns: 1fr;
  }

  .stats { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .detail-side { position: static; }
}

@media (max-width: 640px) {
  .wrap { padding: 0 16px 56px; }
  section { padding-top: 56px; }
  .hero { padding-top: 32px; }

  .edu-card,
  footer.site-footer,
  .exp-top {
    flex-direction: column;
    align-items: flex-start;
  }

  .edu-meta { align-items: flex-start; }
  .adv-item { grid-template-columns: 40px 1fr; padding: 16px; }
  .nav { padding-left: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .orb { animation: none !important; }
  .hero-enter, .reveal, .reveal-left {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .project-card:hover,
  .adv-item:hover,
  .value-card:hover { transform: none; }
}