:root {
  --bg: #0b1018;
  --bg-soft: #0f1622;
  --surface: #131b28;
  --surface-strong: #192233;
  --text: #ecf2ff;
  --muted: #9ea9bc;
  --primary: #34b8b4;
  --primary-strong: #26908d;
  --accent: #b88bff;
  --accent-red: #ff5d6c;
  --accent-red-strong: #ff7a87;
  --accent-red-soft: rgba(255, 93, 108, 0.14);
  --accent-red-glow: rgba(255, 93, 108, 0.22);
  --accent-purple: #a577ff;
  --accent-purple-strong: #c5a7ff;
  --accent-purple-soft: rgba(165, 119, 255, 0.16);
  --accent-purple-glow: rgba(123, 84, 212, 0.22);
  --border: #2f3a4d;
  --shadow-soft: 0 22px 48px -32px rgba(0, 0, 0, 0.85);
  --shadow-card: 0 20px 36px -28px rgba(0, 0, 0, 0.9);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --container-width: 1120px;
  --font-display: "Manrope", "Noto Sans KR", sans-serif;
  --font-body: "Noto Sans KR", "Manrope", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  background:
    radial-gradient(circle at 8% 12%, var(--accent-red-glow), transparent 40%),
    radial-gradient(circle at 84% 86%, var(--accent-purple-glow), transparent 46%),
    radial-gradient(circle at 90% 8%, rgba(52, 184, 180, 0.18), transparent 44%),
    linear-gradient(180deg, #0f1724 0%, #090e16 100%);
}

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(var(--container-width), calc(100% - 2rem));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100%;
  background: var(--primary-strong);
  color: #fff;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  z-index: 100;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(11, 16, 24, 0.82);
  border-bottom: 1px solid rgba(104, 122, 150, 0.33);
}

.nav-container {
  min-height: 4.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  position: relative;
}

.brand {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0.01em;
  text-decoration: none;
  color: var(--text);
  transition: color 160ms ease;
}

.brand:hover,
.brand:focus-visible {
  color: var(--accent-purple-strong);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 700;
  font-size: 0.96rem;
}

.nav-list a:hover,
.nav-list a:focus-visible {
  color: var(--accent-purple-strong);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--surface-strong);
  border-radius: var(--radius-sm);
  width: 2.7rem;
  height: 2.7rem;
  padding: 0.45rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  box-shadow: var(--shadow-soft);
}

.menu-toggle span {
  width: 100%;
  height: 2px;
  background: var(--text);
  border-radius: 999px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.section {
  padding: 5.4rem 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(29, 37, 54, 0.85), rgba(22, 29, 44, 0.62));
  border-top: 1px solid rgba(129, 100, 177, 0.44);
  border-bottom: 1px solid rgba(129, 100, 177, 0.44);
}

.hero {
  padding-top: 6rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
}

.hero-copy {
  animation: rise-in 0.6s ease both;
}

.eyebrow {
  margin: 0;
  color: var(--accent-red);
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0.04em;
  font-size: 0.83rem;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

h1 {
  margin-top: 0.9rem;
  font-size: clamp(2.05rem, 5vw, 3.55rem);
}

.lead {
  margin: 1.2rem 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 2.1vw, 1.2rem);
  max-width: 62ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.65rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  border-radius: 999px;
  padding: 0.52rem 1.15rem;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 160ms ease, background-color 160ms ease, color 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(120deg, var(--primary) 0%, var(--accent-red) 52%, var(--accent-purple) 100%);
  box-shadow: 0 16px 28px -18px rgba(120, 66, 198, 0.82);
  color: #fff;
}

.button-primary:hover,
.button-primary:focus-visible {
  background: linear-gradient(120deg, var(--primary-strong) 0%, var(--accent-red-strong) 45%, var(--accent-purple-strong) 100%);
}

.button-ghost {
  background: var(--surface-strong);
  color: var(--accent-purple-strong);
  border-color: rgba(110, 59, 184, 0.42);
}

.button-ghost:hover,
.button-ghost:focus-visible {
  background: rgba(110, 59, 184, 0.11);
}

.language-switch {
  margin-top: 1.2rem;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--muted);
}

.language-button {
  border: 1px solid rgba(110, 59, 184, 0.44);
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--accent-purple-strong);
  min-width: 3.2rem;
  min-height: 2.1rem;
  font-weight: 800;
  cursor: pointer;
}

.profile-card {
  margin: 0;
  background: linear-gradient(135deg, rgba(30, 39, 57, 0.95), rgba(47, 34, 68, 0.9));
  border-radius: var(--radius-lg);
  border: 1px solid rgba(118, 134, 160, 0.4);
  box-shadow: var(--shadow-soft);
  padding: 1.1rem;
  animation: rise-in 0.7s ease 0.08s both;
}

.profile-card img {
  width: 100%;
  border-radius: 18px;
  border: 1px solid rgba(120, 135, 160, 0.4);
}

.profile-card figcaption {
  margin-top: 0.72rem;
  color: var(--muted);
  font-size: 0.93rem;
}

.section-heading {
  margin-bottom: 1rem;
}

.kicker {
  margin: 0 0 0.25rem;
  color: var(--accent-purple);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

h2 {
  font-size: clamp(1.65rem, 3vw, 2.4rem);
}

.section-intro {
  margin: 0;
  color: var(--muted);
  max-width: 66ch;
}

.about-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.4rem;
  align-items: start;
  margin-top: 1rem;
}

.about-copy p {
  margin: 0;
  color: var(--muted);
}

.about-copy p + p {
  margin-top: 0.9rem;
}

.stat-list {
  margin: 0;
  display: grid;
  gap: 0.8rem;
}

.stat-list div {
  background: var(--surface);
  border: 1px solid rgba(116, 130, 156, 0.34);
  border-radius: var(--radius-md);
  padding: 0.95rem 1rem;
  box-shadow: var(--shadow-card);
  transition: border-color 160ms ease, transform 160ms ease;
}

.stat-list div:hover {
  border-color: rgba(110, 59, 184, 0.44);
  transform: translateY(-2px);
}

.stat-list dt {
  color: var(--muted);
  font-size: 0.9rem;
}

.stat-list dd {
  margin: 0.28rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--text);
}

.skills-grid {
  margin-top: 1.2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.95rem;
}

.skill-card {
  background: var(--surface-strong);
  border: 1px solid rgba(116, 130, 156, 0.34);
  border-radius: var(--radius-md);
  padding: 1rem;
  box-shadow: var(--shadow-card);
  animation: rise-in 0.5s ease both;
  transition: border-color 160ms ease, transform 160ms ease;
}

.skill-card:hover {
  border-color: rgba(110, 59, 184, 0.44);
  transform: translateY(-2px);
}

.skill-card h3 {
  font-size: 1rem;
}

.skill-card ul {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.project-grid {
  margin-top: 1.2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
  gap: 1rem;
}

.project-card {
  display: grid;
  gap: 0.95rem;
  background: var(--surface-strong);
  border: 1px solid rgba(116, 130, 156, 0.34);
  border-radius: var(--radius-md);
  padding: 1rem;
  box-shadow: var(--shadow-card);
  animation: rise-in 0.5s ease both;
  transition: border-color 160ms ease, transform 160ms ease;
}

.project-card:hover {
  border-color: rgba(110, 59, 184, 0.44);
  transform: translateY(-2px);
}

.project-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 0.7rem;
}

.project-card h3 {
  font-size: 1.05rem;
}

.project-period {
  border: 1px solid rgba(110, 59, 184, 0.42);
  border-radius: 999px;
  color: var(--accent-purple-strong);
  background: var(--accent-purple-soft);
  padding: 0.2rem 0.58rem;
  font-size: 0.78rem;
  font-weight: 700;
  white-space: nowrap;
}

.project-summary {
  margin: 0;
  color: var(--muted);
}

.tech-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tech-list li {
  border-radius: 999px;
  padding: 0.2rem 0.62rem;
  border: 1px solid rgba(136, 151, 180, 0.44);
  background: rgba(19, 27, 41, 0.88);
  font-size: 0.8rem;
  color: #c0ccde;
  font-weight: 600;
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.button-link {
  border-radius: 999px;
  min-height: 2.3rem;
  padding: 0.33rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.button-link.primary {
  background: linear-gradient(120deg, var(--accent-red) 0%, var(--accent-purple-strong) 100%);
  color: #fff;
}

.button-link.primary:hover,
.button-link.primary:focus-visible {
  background: linear-gradient(120deg, #b22137 0%, #5f33a2 100%);
}

.button-link.secondary {
  border: 1px solid rgba(110, 59, 184, 0.4);
  color: var(--accent-purple-strong);
  background: var(--surface-strong);
}

.button-link.secondary:hover,
.button-link.secondary:focus-visible {
  background: rgba(110, 59, 184, 0.11);
}

.contact-list {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 0.85rem;
}

.contact-list li {
  background: var(--surface-strong);
  border: 1px solid rgba(116, 130, 156, 0.34);
  border-radius: var(--radius-md);
  padding: 1rem;
  box-shadow: var(--shadow-card);
  display: grid;
  gap: 0.38rem;
  animation: rise-in 0.5s ease both;
  transition: border-color 160ms ease, transform 160ms ease;
}

.contact-list li:hover {
  border-color: rgba(110, 59, 184, 0.44);
  transform: translateY(-2px);
}

.contact-label {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--muted);
}

.contact-list a {
  color: var(--accent-purple-strong);
  font-weight: 700;
}

.site-footer {
  padding: 1.8rem 0 2.3rem;
  border-top: 1px solid rgba(104, 122, 150, 0.33);
  background: rgba(11, 16, 24, 0.78);
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 767px) {
  .section {
    padding: 4.2rem 0;
  }

  .hero {
    padding-top: 4.8rem;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: calc(100% + 0.65rem);
    right: 0;
    left: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 0.9rem;
    border-radius: var(--radius-md);
    border: 1px solid rgba(97, 114, 140, 0.42);
    background: var(--surface-strong);
    box-shadow: var(--shadow-soft);
  }

  .nav-list.is-open {
    display: flex;
  }

  .hero-grid,
  .about-layout {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 768px) {
  .nav-list {
    display: flex !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}