:root {
  --color-bg: #030d06;
  --color-bg-light: #06180c;
  --color-bg-lighter: #092411;
  --color-bg-hover: #0c2e16;
  --color-text: #d8e0f4;
  --color-text-bright: #eef2ff;
  --color-text-slate: #9ca8c0;
  --color-text-light-slate: #b8c4d8;
  --color-accent: #6b9e7b;
  --color-accent-hover: #8bb89a;
  --color-accent-bg: rgba(107, 158, 123, 0.08);
  --color-accent-bg-hover: rgba(107, 158, 123, 0.15);
  --color-border: #0c2e16;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;
  --sidebar-width: 270px;
  --transition: 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
  --easing: cubic-bezier(0.645, 0.045, 0.355, 1);
  --content-max-width: 900px;
}

[data-theme="light"] {
  --color-bg: #f4f7f4;
  --color-bg-light: #ffffff;
  --color-bg-lighter: #e6ebe6;
  --color-bg-hover: #d8dfd8;
  --color-text: #1a1a2e;
  --color-text-bright: #0f172a;
  --color-text-slate: #4a5568;
  --color-text-light-slate: #6b7280;
  --color-accent: #3d6b4d;
  --color-accent-hover: #4d7d5d;
  --color-accent-bg: rgba(61, 107, 77, 0.08);
  --color-accent-bg-hover: rgba(61, 107, 77, 0.15);
  --color-border: #e2e8f0;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition);
}

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

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

.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 40px 30px;
  z-index: 100;
}

.sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.sidebar__link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-slate);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color var(--transition);
  position: relative;
}

.sidebar__link:hover {
  color: var(--color-accent);
}

.sidebar__link::before {
  content: '▸';
  color: var(--color-accent);
  margin-right: 8px;
  font-size: 11px;
}

.sidebar__bottom {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sidebar__social {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}


.sidebar__credit {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-slate);
  line-height: 1.5;
}

.main {
  margin-left: var(--sidebar-width);
  width: calc(100% - var(--sidebar-width));
  max-width: var(--content-max-width);
  padding: 0 60px 80px;
}

.section {
  padding: 80px 0;
}

.section:first-child {
  padding-top: 0;
}

.section__title {
  display: flex;
  align-items: center;
  font-size: 28px;
  font-weight: 600;
  color: var(--color-text-bright);
  margin-bottom: 40px;
  gap: 10px;
  white-space: nowrap;
}

.section__number {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 400;
  color: var(--color-accent);
  margin-right: 4px;
}

.section__line {
  display: block;
  height: 1px;
  width: 100%;
  background: var(--color-border);
  margin-left: 10px;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero__greeting {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.hero__name {
  font-size: 62px;
  font-weight: 700;
  color: var(--color-text-bright);
  line-height: 1.1;
  margin-bottom: 8px;
}

.hero__tagline {
  font-size: 28px;
  font-weight: 600;
  color: var(--color-text-slate);
  line-height: 1.2;
  margin-bottom: 24px;
}

.hero__desc {
  font-size: 16px;
  color: var(--color-text-slate);
  max-width: 540px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero__cta {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-accent);
  background: transparent;
  border: 1px solid var(--color-accent);
  border-radius: 4px;
  padding: 14px 28px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.hero__cta:hover {
  background: var(--color-accent-bg);
  color: var(--color-accent-hover);
}

.hero__email {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-text-slate);
  margin-left: 24px;
  transition: color var(--transition);
}

.hero__email:hover {
  color: var(--color-accent);
}

.about__text p {
  font-size: 16px;
  color: var(--color-text-slate);
  margin-bottom: 16px;
  line-height: 1.7;
  max-width: 600px;
}

.about__text strong {
  color: var(--color-text);
}

.experience__inner {
  display: flex;
  gap: 30px;
}

.experience__tabs {
  display: flex;
  flex-direction: column;
  min-width: 140px;
}

.experience__tab {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-slate);
  background: transparent;
  border: none;
  border-left: 2px solid var(--color-border);
  padding: 12px 16px;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.experience__tab:hover {
  color: var(--color-accent);
  background: var(--color-accent-bg);
}

.experience__tab.active {
  color: var(--color-accent);
  border-left-color: var(--color-accent);
  background: var(--color-accent-bg);
}

.experience__panels {
  flex: 1;
}

.experience__panel {
  display: none;
}

.experience__panel.active {
  display: block;
}

.experience__role {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text-bright);
  margin-bottom: 4px;
}

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

.experience__dates {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-slate);
  margin-bottom: 20px;
}

.experience__bullets {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
}

.experience__bullets li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
  font-size: 15px;
  color: var(--color-text-slate);
  line-height: 1.6;
}

.experience__bullets li::before {
  content: '\25B8';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 14px;
}

.experience__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.experience__tags li {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent);
  background: var(--color-accent-bg);
  padding: 4px 10px;
  border-radius: 3px;
}

.experience__resume-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-accent);
  margin-top: 40px;
  transition: color var(--transition);
}

.experience__resume-link:hover {
  color: var(--color-accent-hover);
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.project-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg-light);
  border-radius: 6px;
  padding: 28px 24px;
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid transparent;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  border-color: var(--color-border);
}

.project-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.project-card__folder {
  font-size: 36px;
  line-height: 1;
}

.project-card__links a {
  color: var(--color-text-slate);
  font-size: 20px;
  transition: color var(--transition);
}

.project-card__links a:hover {
  color: var(--color-accent);
}

.project-card__title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text-bright);
  margin-bottom: 12px;
  transition: color var(--transition);
}

.project-card:hover .project-card__title {
  color: var(--color-accent);
}

.project-card__desc {
  font-size: 14px;
  color: var(--color-text-slate);
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.project-card__tags li {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-slate);
  white-space: nowrap;
}

.writing__list {
  display: flex;
  flex-direction: column;
}

.writing__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition);
  gap: 20px;
}

.writing__item:first-child {
  border-top: 1px solid var(--color-border);
}

.writing__item:hover .writing__title {
  color: var(--color-accent);
}

.writing__item:hover .writing__arrow {
  color: var(--color-accent);
  transform: translateX(4px);
}

.writing__meta {
  display: flex;
  align-items: baseline;
  gap: 24px;
  flex: 1;
}

.writing__date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-slate);
  white-space: nowrap;
  min-width: 36px;
}

.writing__title {
  font-size: 16px;
  color: var(--color-text);
  transition: color var(--transition);
}

.writing__arrow {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-text-slate);
  transition: all var(--transition);
}

.site-footer {
  padding: 40px 0 20px;
  text-align: center;
}

.site-footer p {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-text-slate);
  line-height: 1.8;
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s var(--easing), transform 0.5s var(--easing);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.mobile-toggle {
  display: none;
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 200;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  color: var(--color-accent);
  font-size: 24px;
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }

  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s var(--easing);
    background: var(--color-bg-light);
    width: 280px;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 99;
  }

  .sidebar-overlay.open {
    display: block;
  }

  .main {
    margin-left: 0;
    width: 100%;
    padding: 0 24px 60px;
  }

  .hero__name {
    font-size: 36px;
  }

  .hero__tagline {
    font-size: 20px;
  }

  .hero__email {
    display: block;
    margin-left: 0;
    margin-top: 16px;
  }

  .section {
    padding: 60px 0;
  }

  .section__title {
    font-size: 22px;
  }

  .experience__inner {
    flex-direction: column;
    gap: 20px;
  }

  .experience__tabs {
    flex-direction: row;
    overflow-x: auto;
    min-width: unset;
  }

  .experience__tab {
    border-left: none;
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
    padding: 10px 14px;
  }

  .experience__tab.active {
    border-bottom-color: var(--color-accent);
    border-left-color: transparent;
  }

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

  .writing__meta {
    flex-direction: column;
    gap: 6px;
  }
}

@media (max-width: 480px) {
  .hero__name {
    font-size: 28px;
  }

  .hero__tagline {
    font-size: 17px;
  }

  .main {
    padding: 0 16px 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }
}