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

:root,
:root[data-theme="dark"] {
  --bg: #0a0a0f;
  --bg-top: #07080d;
  --bg-bottom: #08090e;
  --glow-primary: rgba(0, 229, 255, 0.18);
  --glow-secondary: rgba(37, 99, 235, 0.16);
  --grid-line: rgba(255, 255, 255, 0.02);
  --header-bg: rgba(7, 8, 13, 0.62);
  --panel: rgba(13, 16, 24, 0.78);
  --panel-strong: rgba(17, 22, 33, 0.92);
  --surface-tint-top: rgba(255, 255, 255, 0.05);
  --surface-tint-bottom: rgba(255, 255, 255, 0.02);
  --soft-surface: rgba(255, 255, 255, 0.02);
  --soft-surface-strong: rgba(255, 255, 255, 0.025);
  --tag-bg: rgba(255, 255, 255, 0.03);
  --button-secondary-bg: rgba(255, 255, 255, 0.03);
  --text: #f4f7fb;
  --muted: #9ba8bb;
  --text-soft: rgba(244, 247, 251, 0.9);
  --text-faint: rgba(244, 247, 251, 0.68);
  --border: rgba(255, 255, 255, 0.08);
  --soft-border: rgba(255, 255, 255, 0.06);
  --divider: rgba(255, 255, 255, 0.08);
  --accent: #00e5ff;
  --accent-soft: rgba(0, 229, 255, 0.16);
  --accent-border: rgba(0, 229, 255, 0.28);
  --page-glow: rgba(0, 229, 255, 0.16);
  --surface-hover-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.45);
  --project-link-color: #d9faff;
  --tag-text: #d7e1ed;
  --toggle-bg: rgba(255, 255, 255, 0.05);
  --toggle-thumb: #00e5ff;
  --toggle-icon: rgba(244, 247, 251, 0.72);
  --toggle-active-icon: #091422;
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --max-width: 1180px;
}

:root[data-theme="light"] {
  --bg: #eef4fa;
  --bg-top: #fcfdff;
  --bg-bottom: #e9f0f7;
  --glow-primary: rgba(0, 229, 255, 0.1);
  --glow-secondary: rgba(37, 99, 235, 0.08);
  --grid-line: rgba(9, 20, 34, 0.06);
  --header-bg: rgba(255, 255, 255, 0.76);
  --panel: rgba(255, 255, 255, 0.8);
  --panel-strong: rgba(255, 255, 255, 0.92);
  --surface-tint-top: rgba(255, 255, 255, 0.82);
  --surface-tint-bottom: rgba(255, 255, 255, 0.58);
  --soft-surface: rgba(255, 255, 255, 0.76);
  --soft-surface-strong: rgba(255, 255, 255, 0.82);
  --tag-bg: rgba(9, 20, 34, 0.04);
  --button-secondary-bg: rgba(255, 255, 255, 0.72);
  --text: #091422;
  --muted: #5b6b80;
  --text-soft: rgba(9, 20, 34, 0.92);
  --text-faint: rgba(9, 20, 34, 0.64);
  --border: rgba(9, 20, 34, 0.08);
  --soft-border: rgba(9, 20, 34, 0.08);
  --divider: rgba(9, 20, 34, 0.08);
  --accent-soft: rgba(0, 229, 255, 0.12);
  --page-glow: rgba(0, 229, 255, 0.12);
  --surface-hover-shadow: 0 18px 44px rgba(16, 24, 40, 0.14);
  --shadow: 0 24px 60px rgba(16, 24, 40, 0.12);
  --project-link-color: #0a7384;
  --tag-text: #243247;
  --toggle-bg: rgba(9, 20, 34, 0.06);
  --toggle-thumb: #091422;
  --toggle-icon: rgba(9, 20, 34, 0.62);
  --toggle-active-icon: #f4f7fb;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "DM Sans", sans-serif;
  background:
    radial-gradient(circle at top left, var(--glow-primary), transparent 28rem),
    radial-gradient(circle at 85% 15%, var(--glow-secondary), transparent 22rem),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg) 45%, var(--bg-bottom) 100%);
  color: var(--text);
  transition: background-color 240ms ease, color 240ms ease, background 240ms ease;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5), transparent);
  pointer-events: none;
  transition: background-image 240ms ease;
}

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

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

.page-glow {
  position: fixed;
  inset: auto auto 8% 50%;
  width: min(70vw, 52rem);
  height: 18rem;
  transform: translateX(-50%);
  background: radial-gradient(circle, var(--page-glow), transparent 70%);
  filter: blur(30px);
  pointer-events: none;
  transition: background 240ms ease;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 1rem auto 0;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--header-bg);
  backdrop-filter: blur(18px);
  transition: background-color 240ms ease, border-color 240ms ease, box-shadow 240ms ease;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-width: 0;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-text {
  font-family: "Syne", sans-serif;
  font-size: 1.15rem;
  letter-spacing: 0.03em;
  text-transform: none;
  white-space: nowrap;
}

.brand-dot {
  color: var(--accent);
  font-size: 1.24em;
  line-height: 0;
}

.site-nav a,
.nav-cta,
.button,
.project-link,
.meta-label,
.panel-label,
.section-kicker,
.card-kicker,
.project-index {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
}

.site-nav {
  display: none;
  align-items: center;
  gap: 1.4rem;
  color: var(--muted);
}

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex-shrink: 0;
}

.site-nav a,
.nav-cta,
.theme-toggle,
.button,
.project-card,
.skill-block,
.info-card,
.contact-panel,
.contact-list a {
  transition:
    transform 220ms ease,
    border-color 220ms ease,
    background-color 220ms ease,
    color 220ms ease,
    box-shadow 220ms ease,
    opacity 220ms ease;
}

.site-header,
.hero-copy,
.hero-panel,
.panel-card,
.panel-stat,
.contact-shell,
.skill-tags span {
  transition:
    background-color 220ms ease,
    border-color 220ms ease,
    box-shadow 220ms ease,
    color 220ms ease,
    background 220ms ease;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0 1rem;
  border: 1px solid var(--accent-border);
  border-radius: 999px;
  color: var(--accent);
  background: var(--button-secondary-bg);
  white-space: nowrap;
}

.theme-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.9rem;
  height: 2.9rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  background:
    linear-gradient(180deg, var(--surface-tint-top), var(--surface-tint-bottom)),
    var(--panel);
  box-shadow: var(--shadow);
  cursor: pointer;
}

.theme-toggle::after {
  content: "";
  position: absolute;
  inset: 0.38rem;
  border-radius: 999px;
  background: radial-gradient(circle, var(--accent-soft), transparent 72%);
  opacity: 0.7;
  transform: scale(0.9);
  transition: opacity 240ms ease, transform 240ms ease;
}

.theme-toggle-icon {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.08rem;
  height: 1.08rem;
  color: var(--toggle-icon);
  transition: color 240ms ease, opacity 240ms ease, transform 240ms ease;
}

.theme-toggle-icon svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}

:root[data-theme="dark"] .theme-toggle-icon-sun,
:root:not([data-theme]) .theme-toggle-icon-sun {
  opacity: 0;
  transform: rotate(-40deg) scale(0.65);
}

:root[data-theme="dark"] .theme-toggle-icon-moon,
:root:not([data-theme]) .theme-toggle-icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
  color: var(--accent);
}

:root[data-theme="light"] .theme-toggle-icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
  color: var(--accent);
}

:root[data-theme="light"] .theme-toggle-icon-moon {
  opacity: 0;
  transform: rotate(40deg) scale(0.65);
}

main {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
  padding: 1.25rem 0 4.5rem;
}

.section {
  padding: 4.5rem 0;
  scroll-margin-top: 6.5rem;
}

.hero {
  display: grid;
  gap: 2rem;
  align-items: center;
  padding-top: 1.8rem;
}

.hero-copy,
.hero-panel,
.skill-block,
.project-card,
.info-card,
.contact-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, var(--surface-tint-top), var(--surface-tint-bottom)),
    var(--panel);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 1.5rem;
}

.hero-panel {
  padding: 1.25rem;
}

.hero-copy::after,
.hero-panel::after,
.skill-block::after,
.project-card::after,
.info-card::after,
.contact-panel::after {
  content: "";
  position: absolute;
  inset: auto -20% -50% 20%;
  height: 8rem;
  background: radial-gradient(circle, var(--accent-soft), transparent 70%);
  pointer-events: none;
}

.eyebrow,
.section-kicker,
.card-kicker,
.panel-label {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 2rem;
  padding: 0 0.85rem;
  border: 1px solid var(--accent-border);
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}

.hero-role {
  margin: 1.2rem 0 0;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.hero-accent {
  color: var(--accent);
}

.hero-location {
  margin: 0.6rem 0 0;
  color: var(--text-faint);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Syne", sans-serif;
  line-height: 1;
}

h1 {
  margin-top: 1rem;
  font-size: clamp(3rem, 14vw, 6.4rem);
}

h2 {
  font-size: clamp(2rem, 8vw, 3.5rem);
}

h3 {
  font-size: 1.35rem;
}

.hero-tagline {
  margin: 1rem 0 0;
  font-family: "Syne", sans-serif;
  font-size: clamp(1.35rem, 5vw, 2.1rem);
  color: var(--text-soft);
}

.hero-description,
.about-copy p,
.info-card p,
.skill-block p,
.project-card p,
.contact-copy p,
.contact-list a,
.hero-meta .meta-copy {
  color: var(--muted);
  line-height: 1.7;
}

.hero-description {
  max-width: 38rem;
  margin: 1rem 0 0;
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-top: 1.6rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.3rem;
  padding: 0 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
}

.button-primary {
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.16), rgba(0, 229, 255, 0.28));
  border-color: var(--accent-border);
  color: var(--text);
}

.button-secondary {
  border-color: var(--border);
  background: var(--button-secondary-bg);
}

.hero-meta {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--divider);
}

.meta-label {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--accent);
}

.meta-copy {
  display: block;
}

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

.panel-card strong {
  display: block;
  margin-top: 0.75rem;
  font-size: 1.35rem;
  line-height: 1.35;
}

.panel-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
}

.panel-stat {
  padding: 1.1rem;
  border: 1px solid var(--soft-border);
  border-radius: var(--radius-md);
  background: var(--soft-surface-strong);
}

.stat-value {
  display: block;
  margin-bottom: 0.35rem;
  font-family: "Syne", sans-serif;
  font-size: 1.35rem;
  color: var(--accent);
}

.stat-label {
  color: var(--muted);
  line-height: 1.55;
}

.section-heading {
  display: grid;
  gap: 1rem;
}

.section-heading h2 {
  max-width: 42rem;
}

.about-layout,
.contact-shell {
  display: grid;
  gap: 1.2rem;
  margin-top: 1.8rem;
}

.about-cards,
.skills-grid,
.projects-grid {
  display: grid;
  gap: 1rem;
}

.info-card,
.skill-block {
  padding: 1.35rem;
}

.info-card h3,
.skill-block h3 {
  margin-top: 1rem;
}

.info-card p,
.skill-block p {
  margin: 0.85rem 0 0;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1rem;
}

.skill-tags span {
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  padding: 0 0.95rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--tag-bg);
  color: var(--tag-text);
}

.projects-grid {
  margin-top: 1.8rem;
}

.project-card {
  display: block;
  padding: 1.4rem;
}

.project-index {
  color: var(--accent);
}

.project-card h3 {
  margin-top: 1rem;
}

.project-card p {
  margin: 0.85rem 0 1.4rem;
}

.project-link {
  color: var(--project-link-color);
}

.contact-shell {
  padding: 1.6rem;
  border: 1px solid var(--border);
  border-radius: calc(var(--radius-lg) + 4px);
  background:
    linear-gradient(180deg, var(--surface-tint-top), var(--surface-tint-bottom)),
    var(--panel-strong);
  box-shadow: var(--shadow);
}

.contact-panel {
  padding: 1.25rem;
}

.button-wide {
  width: 100%;
}

.contact-list {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.2rem;
}

.contact-list a {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  min-height: 4rem;
  padding: 0.95rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--soft-surface-strong);
}

.contact-icon {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
}

.contact-icon svg {
  width: 1.2rem;
  height: 1.2rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.contact-icon .icon-fill {
  fill: currentColor;
  stroke: none;
}

.contact-label {
  overflow-wrap: anywhere;
  color: var(--text);
  font-weight: 500;
}

.js .reveal {
  opacity: 0;
  transform: translateY(24px);
}

.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 700ms ease,
    transform 700ms ease;
}

.nav-cta:hover,
.button:hover,
.project-card:hover,
.skill-block:hover,
.info-card:hover,
.contact-list a:hover {
  transform: translateY(-4px);
}

.project-card:hover,
.skill-block:hover,
.info-card:hover,
.contact-panel:hover {
  border-color: var(--accent-border);
  box-shadow: var(--surface-hover-shadow);
}

.site-nav a:hover,
.contact-list a:hover {
  color: var(--text);
}

.site-nav a:focus-visible,
.nav-cta:focus-visible,
.theme-toggle:focus-visible,
.button:focus-visible,
.project-card:focus-visible,
.contact-list a:focus-visible,
.brand:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.button-primary:hover,
.nav-cta:hover {
  box-shadow: 0 12px 36px rgba(0, 229, 255, 0.18);
}

.theme-toggle:hover {
  border-color: var(--accent-border);
  transform: translateY(-2px);
}

.theme-toggle:hover::after {
  opacity: 1;
  transform: scale(1);
}

@media (min-width: 720px) {
  .site-nav {
    display: inline-flex;
  }

  .hero-actions {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .hero-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-cards,
  .skills-grid,
  .projects-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 719px) {
  .site-header {
    padding: 0.75rem 0.85rem;
    gap: 0.65rem;
  }

  .brand-text {
    font-size: 1.02rem;
  }

  .header-actions {
    gap: 0.5rem;
  }

  .nav-cta {
    min-height: 2.7rem;
    padding: 0 0.8rem;
    font-size: 0.68rem;
    letter-spacing: 0.08em;
  }

  .theme-toggle {
    width: 2.7rem;
    height: 2.7rem;
  }

  .theme-toggle-icon {
    width: 1rem;
    height: 1rem;
  }

  .hero-copy {
    padding: 1.3rem;
  }
}

@media (min-width: 960px) {
  main {
    padding-top: 3rem;
  }

  .hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.72fr);
  }

  .hero-copy {
    padding: 2rem;
  }

  .hero-panel {
    padding: 1.5rem;
  }

  .about-layout,
  .contact-shell {
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.92fr);
    align-items: start;
  }

  .about-cards {
    grid-template-columns: 1fr;
  }

  .skills-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .projects-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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

  .site-nav a,
  .nav-cta,
  .theme-toggle,
  .button,
  .project-card,
  .skill-block,
  .info-card,
  .contact-panel,
  .site-header,
  .hero-copy,
  .hero-panel,
  .panel-card,
  .panel-stat,
  .contact-shell,
  .skill-tags span,
  .js .reveal {
    transition: none;
  }

  .js .reveal,
  .js .reveal.is-visible {
    opacity: 1;
    transform: none;
  }
}