:root {
  --bg: #0b1220;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-strong: rgba(255, 255, 255, 0.09);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.72);
  --faint: rgba(255, 255, 255, 0.55);
  --border: rgba(255, 255, 255, 0.12);
  --accent: #77a7ff;
  --accent-2: #7ee7d6;

  --shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
  --radius: 18px;
  --radius-sm: 12px;
  --container: 1100px;
}

:root[data-theme="light"] {
  --bg: #f7f8fb;
  --panel: rgba(10, 20, 40, 0.06);
  --panel-strong: rgba(10, 20, 40, 0.09);
  --text: rgba(10, 20, 40, 0.92);
  --muted: rgba(10, 20, 40, 0.72);
  --faint: rgba(10, 20, 40, 0.55);
  --border: rgba(10, 20, 40, 0.14);
  --accent: #1d5bff;
  --accent-2: #00a38d;

  --shadow: 0 10px 30px rgba(10, 20, 40, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial,
    "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(
      1200px 600px at 10% 10%,
      rgba(119, 167, 255, 0.22),
      transparent 60%
    ),
    radial-gradient(
      900px 500px at 95% 30%,
      rgba(126, 231, 214, 0.18),
      transparent 55%
    ),
    var(--bg);
  color: var(--text);
}

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

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  font-size: 0.95em;
}

.container {
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
}

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

.skip-link {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.6rem 0.8rem;
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transform: translateY(-140%);
  transition: transform 160ms ease;
  z-index: 1000;
}
.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: color-mix(in oklab, var(--bg) 70%, transparent);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 0;
}

.brand {
  display: inline-flex;
  gap: 0.65rem;
  align-items: center;
  font-weight: 700;
  letter-spacing: 0.2px;
}
.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: rgba(0, 0, 0, 0.85);
  box-shadow: var(--shadow);
}
.brand-text {
  font-size: 1.02rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-menu {
  list-style: none;
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 0;
  margin: 0;
}

.nav-menu a {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0.55rem;
  border-radius: 10px;
  transition: background 160ms ease, color 160ms ease;
}
.nav-menu a:hover,
.nav-menu a:focus-visible {
  background: var(--panel);
  color: var(--text);
  outline: none;
}

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 12px;
  padding: 0.45rem 0.6rem;
  cursor: pointer;
  transition: transform 120ms ease, background 160ms ease;
}
.theme-toggle:hover {
  transform: translateY(-1px);
  background: var(--panel-strong);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 12px;
  padding: 0.55rem 0.7rem;
  cursor: pointer;
}
.nav-toggle-bars {
  display: inline-block;
  width: 18px;
  height: 2px;
  background: currentColor;
  position: relative;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
}
.nav-toggle-bars::before {
  top: -6px;
}
.nav-toggle-bars::after {
  top: 6px;
}

.hero {
  padding: 3.6rem 0 2.2rem;
}

.hero-inner {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1.35fr 0.9fr;
  align-items: start;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  font-weight: 650;
  font-size: 0.9rem;
}

h1 {
  margin: 1.1rem 0 0.8rem;
  font-size: clamp(2rem, 3.4vw, 3.1rem);
  line-height: 1.08;
  letter-spacing: -0.6px;
}

.lead {
  margin: 0 0 1.2rem;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 1.2rem 0 1.6rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.7rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-weight: 700;
  transition: transform 120ms ease, background 160ms ease, border 160ms ease;
}
.btn:hover {
  transform: translateY(-1px);
  background: var(--panel-strong);
}
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: rgba(0, 0, 0, 0.85);
  border-color: transparent;
}
.btn.primary:hover {
  filter: saturate(1.05);
}
.btn.ghost {
  background: transparent;
}
.btn.small {
  padding: 0.55rem 0.8rem;
  border-radius: 12px;
  font-size: 0.95rem;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 0.8rem;
}
.metric {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 0.9rem;
}
.metric-num {
  font-weight: 900;
  font-size: 1.25rem;
}
.metric-label {
  color: var(--faint);
  font-weight: 650;
  margin-top: 0.2rem;
  font-size: 0.92rem;
}

.hero-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: color-mix(in oklab, var(--panel) 85%, transparent);
  box-shadow: var(--shadow);
  padding: 1.2rem;
}

.profile {
  display: flex;
  gap: 0.9rem;
  align-items: center;
}
.avatar {
  width: 52px;
  height: 52px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: rgba(0, 0, 0, 0.85);
}
.profile-name {
  margin: 0;
  font-weight: 900;
  font-size: 1.05rem;
}
.profile-title,
.profile-loc {
  margin: 0.15rem 0 0;
  color: var(--muted);
  font-weight: 650;
  font-size: 0.95rem;
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 1rem 0;
}

.card-title {
  margin: 0 0 0.25rem;
  font-size: 1.05rem;
}
.muted {
  color: var(--muted);
}
.small {
  font-size: 0.92rem;
}

.social-list {
  list-style: none;
  padding: 0;
  margin: 0.8rem 0 0;
  display: grid;
  gap: 0.35rem;
}
.social-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.6rem 0.7rem;
  border-radius: 14px;
  border: 1px solid transparent;
  color: var(--text);
  transition: background 160ms ease, border 160ms ease, transform 120ms ease;
}
.social-link:hover {
  background: var(--panel);
  border-color: var(--border);
  transform: translateY(-1px);
}
.icon {
  width: 26px;
  height: 26px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: color-mix(in oklab, var(--panel-strong) 70%, transparent);
  border: 1px solid var(--border);
}

.quick-contact a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.pill {
  display: inline-flex;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  font-weight: 700;
  font-size: 0.85rem;
}

.section {
  padding: 2.6rem 0;
}

.section-head {
  margin-bottom: 1.2rem;
}
.section-head h2 {
  margin: 0 0 0.3rem;
  font-size: 1.6rem;
  letter-spacing: -0.3px;
}
.section-head p {
  margin: 0;
}

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 1.2rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.8rem;
}
.tag {
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--panel-strong) 70%, transparent);
  font-weight: 750;
  font-size: 0.9rem;
}

.list {
  margin: 0.6rem 0 0;
  padding-left: 1.1rem;
}
.bullets {
  margin: 0.7rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
}
.bullets li {
  margin: 0.35rem 0;
}
.bullets.compact li {
  margin: 0.25rem 0;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.project-top h3 {
  margin: 0;
}
.project-top p {
  margin: 0.35rem 0 0;
}
.project-actions {
  display: flex;
  gap: 0.55rem;
  margin-top: 1rem;
}

.callout {
  margin-top: 1rem;
  padding: 0.9rem;
  border-radius: var(--radius);
  border: 1px dashed var(--border);
  background: color-mix(in oklab, var(--panel-strong) 65%, transparent);
}

.form {
  display: grid;
  gap: 0.85rem;
  margin-top: 0.6rem;
}
label span {
  display: block;
  font-weight: 750;
  margin-bottom: 0.35rem;
  color: var(--muted);
}
input,
textarea {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--panel) 82%, transparent);
  padding: 0.75rem 0.85rem;
  color: var(--text);
  outline: none;
}
input:focus,
textarea:focus {
  border-color: color-mix(in oklab, var(--accent) 50%, var(--border));
}

.site-footer {
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--border);
  margin-top: 1.5rem;
}
.footer-inner {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  justify-content: space-between;
}
.back-to-top {
  color: var(--muted);
  font-weight: 700;
  padding: 0.4rem 0.6rem;
  border-radius: 12px;
  border: 1px solid transparent;
}
.back-to-top:hover {
  border-color: var(--border);
  background: var(--panel);
}

/* Responsive */
@media (max-width: 940px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }
  .project-grid {
    grid-template-columns: 1fr;
  }
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
  }

  .nav-menu {
    position: absolute;
    right: 1rem;
    top: 64px;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 0.6rem;
    width: min(280px, calc(100% - 2rem));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: color-mix(in oklab, var(--bg) 70%, transparent);
    box-shadow: var(--shadow);
    display: none;
  }

  .nav-menu[data-open="true"] {
    display: flex;
  }

  .nav-menu a {
    padding: 0.7rem 0.75rem;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}