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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Courier New', monospace;
  color: var(--to-text);
  background-color: var(--to-bg);
}

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

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--to-primary);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 8px 16px;
  background: var(--to-bg-card);
  border: 1px solid var(--to-border);
  border-radius: 4px;
  z-index: 20000;
}

.skip-link:focus {
  left: 16px;
  top: 16px;
}

.site-header {
  max-width: 1200px;
  margin: 0 auto 24px;
  padding: 16px 16px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  position: relative;
  z-index: 10;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.site-header__logo {
  background: var(--to-bg-card);
}

.site-header__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.site-header__title {
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-header__subtitle {
  font-size: 12px;
  color: var(--to-text-muted);
}

.site-nav__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  padding: 0;
  margin: 0;
  font-size: 14px;
}

.site-nav__list a {
  padding: 6px 10px;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.site-nav__list a:hover {
  background-color: var(--to-bg-tertiary);
}

.site-nav__list a[aria-current='page'] {
  background-color: var(--to-bg-tertiary);
  color: var(--to-text);
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px 80px;
}

.section {
  margin-top: 40px;
}

.section:first-of-type {
  margin-top: 24px;
}

.section__header {
  margin-bottom: 20px;
}

.section__header h2 {
  margin: 0 0 8px;
  font-size: 22px;
}

.section__subtitle {
  margin: 0;
  font-size: 14px;
  color: var(--to-text-muted);
  max-width: 640px;
}

.section__content {
  margin-top: 8px;
  line-height: 1.6;
  font-size: 14px;
}

.section__content p {
  margin-top: 0;
  margin-bottom: 12px;
}

.section__grid {
  margin-top: 8px;
}

.section__split {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 20px;
  margin-top: 8px;
}

.hero {
  margin-top: 24px;
}

.hero__layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1.4fr);
  gap: 24px;
  align-items: stretch;
}

.hero__content {
  background: var(--to-bg-card);
}

.hero__title {
  margin: 8px 0;
  font-size: clamp(24px, 3vw, 32px);
}

.hero__subtitle {
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--to-text-muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}

.hero__primary-action {
  display: inline-flex;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  margin-top: 12px;
  font-size: 12px;
}

.hero__pulse-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--to-text-muted);
}

.hero__aside {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
}

.hero__aside-header {
  display: flex;
  justify-content: flex-end;
}

.hero__aside-text {
  margin: 0;
  font-size: 14px;
  color: var(--to-text-muted);
}

.hero__aside-list {
  margin: 0;
  padding-left: 18px;
  font-size: 14px;
  color: var(--to-text);
}

.hero__aside-list li + li {
  margin-top: 4px;
}

.hero__aside-footer {
  margin-top: 8px;
}

.feature-card h3,
.stack-card h3 {
  margin-top: 0;
  margin-bottom: 6px;
  font-size: 16px;
}

.feature-card p,
.stack-card p {
  margin: 0;
  font-size: 14px;
  color: var(--to-text-muted);
}

.stack-card__tags {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.to-timeline h3 {
  margin: 0 0 4px;
  font-size: 15px;
}

.to-timeline p {
  margin: 0;
  font-size: 13px;
  color: var(--to-text-muted);
}

.contact__actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.contact__note {
  font-size: 12px;
  color: var(--to-text-muted);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.contact-form__field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-form__field label {
  font-size: 13px;
}

.contact-form__field input,
.contact-form__field textarea {
  border-radius: 4px;
  border: 1px solid var(--to-border-light);
  background: var(--to-bg-secondary);
  color: var(--to-text);
  padding: 8px 10px;
  font-family: inherit;
  font-size: 13px;
}

.contact-form__field input::placeholder,
.contact-form__field textarea::placeholder {
  color: var(--to-text-muted);
}

.contact-form__hint {
  margin: 8px 0 0;
  font-size: 12px;
  color: var(--to-text-muted);
}

.site-footer {
  border-top: 1px solid var(--to-border);
  margin-top: 40px;
}

.site-footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  color: var(--to-text-muted);
}

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.site-footer__nav a {
  padding: 4px 8px;
  border-radius: 4px;
  transition: background-color 0.2s ease;
}

.site-footer__nav a:hover {
  background-color: var(--to-bg-tertiary);
}

/* ============================================
   Mobile Navigation - Show Hamburger on Mobile
   ============================================ */
@media (max-width: 767px) {
  .site-nav__toggle {
    display: flex;
  }

  .site-header {
    flex-wrap: nowrap;
    gap: 12px;
    padding: 12px 16px 0;
  }

  .site-header__brand {
    gap: 8px;
  }

  .site-header__logo {
    font-size: 14px;
  }

  .site-header__title {
    font-size: 16px;
  }

  .site-header__subtitle {
    font-size: 10px;
  }

  .site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(10px);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 1000;
    overflow-y: auto;
    padding: 80px 20px 20px;
  }

  .site-nav[aria-hidden="false"] {
    transform: translateX(0);
  }

  .site-nav__list {
    flex-direction: column;
    gap: 8px;
    padding: 0;
    margin: 0;
    list-style: none;
  }

  .site-nav__list a {
    display: block;
    padding: 16px 20px;
    border-radius: 8px;
    font-size: 16px;
    text-align: left;
    transition: all 0.2s ease;
    min-height: auto;
    min-width: auto;
  }

  .site-nav__list a:hover {
    background-color: var(--to-bg-tertiary);
    transform: translateX(4px);
  }

  .site-nav__list a[aria-current='page'] {
    background-color: var(--to-bg-tertiary);
    color: var(--to-text);
  }

  .site-nav__toggle {
    position: relative;
    z-index: 1001;
  }

  .site-nav__toggle-icon {
    display: block;
    width: 24px;
    height: 18px;
    position: relative;
  }

  .site-nav__toggle-icon::before,
  .site-nav__toggle-icon::after,
  .site-nav__toggle-icon span {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--to-text);
    transition: all 0.3s ease;
  }

  .site-nav__toggle-icon span {
    top: 50%;
    transform: translateY(-50%);
  }

  .site-nav__toggle-icon::before {
    top: 0;
  }

  .site-nav__toggle-icon::after {
    bottom: 0;
  }

  .site-nav__toggle[aria-expanded="true"] .site-nav__toggle-icon::before {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
  }

  .site-nav__toggle[aria-expanded="true"] .site-nav__toggle-icon::after {
    bottom: 50%;
    transform: translateY(-50%) rotate(-45deg);
  }

  .site-nav__toggle[aria-expanded="true"] .site-nav__toggle-icon span {
    opacity: 0;
  }
}

/* ============================================
   Tablet and Up: 768px
   ============================================ */
@media (min-width: 768px) {
  .site-nav__toggle {
    display: none;
  }

  .site-nav {
    position: static;
    transform: none;
    background: transparent;
    border: none;
    display: block !important;
    overflow: visible;
  }

  .site-nav__list {
    flex-direction: row;
    gap: 16px;
    padding: 0;
  }

  .site-nav__list a {
    padding: 8px 12px;
    min-height: auto;
  }

  main {
    padding: 0 20px 80px;
  }

  .section__header h2 {
    font-size: 24px;
  }

  .hero__layout {
    grid-template-columns: 1.5fr 1fr;
    gap: 32px;
  }

  .hero__content {
    padding: 24px;
  }

  .hero__title {
    font-size: 32px;
  }

  .hero__actions {
    flex-direction: row;
  }

  .hero__meta {
    flex-direction: row;
  }

  .section__split {
    grid-template-columns: 1.35fr 1fr;
  }

  .section__grid.to-grid[data-columns="3"] {
    grid-template-columns: repeat(3, 1fr);
  }

  .section__grid.to-grid[data-columns="2"] {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }

  /* Tablet-specific improvements */
  .site-header {
    padding: 16px 24px 0;
    max-width: 100%;
  }

  .site-header__brand {
    gap: 16px;
  }

  .site-header__logo {
    font-size: 16px;
  }

  .site-header__title {
    font-size: 18px;
  }

  .site-header__subtitle {
    font-size: 11px;
  }

  .hero__aside {
    padding: 20px;
  }

  .hero__aside-text {
    font-size: 15px;
  }

  .hero__aside-list {
    font-size: 15px;
  }

  .feature-card,
  .stack-card {
    padding: 20px;
  }

  .feature-card h3,
  .stack-card h3 {
    font-size: 18px;
  }

  .contact-form__field input,
  .contact-form__field textarea {
    font-size: 14px;
    padding: 10px 12px;
  }

  .contact-form__field label {
    font-size: 14px;
  }
}

/* ============================================
   Small Laptops: 1024px
   ============================================ */
@media (min-width: 1024px) {
  .site-header,
  .site-footer__inner,
  main {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
  }

  .hero__layout {
    grid-template-columns: 2fr 1.4fr;
    gap: 40px;
  }

  .hero__content {
    padding: 32px;
  }

  .hero__title {
    font-size: 36px;
  }

  .hero__aside {
    padding: 24px;
  }

  .hero__aside-text {
    font-size: 16px;
  }

  .hero__aside-list {
    font-size: 16px;
  }

  .section__header h2 {
    font-size: 28px;
  }

  .feature-card,
  .stack-card {
    padding: 24px;
  }

  .feature-card h3,
  .stack-card h3 {
    font-size: 20px;
  }

  .contact-form__field input,
  .contact-form__field textarea {
    font-size: 15px;
    padding: 12px 16px;
  }

  .contact-form__field label {
    font-size: 15px;
  }

  .site-header {
    padding: 20px 32px 0;
  }

  .site-header__brand {
    gap: 20px;
  }

  .site-header__logo {
    font-size: 18px;
  }

  .site-header__title {
    font-size: 20px;
  }

  .site-header__subtitle {
    font-size: 12px;
  }

  .site-nav__list {
    gap: 20px;
  }

  .site-nav__list a {
    padding: 10px 16px;
    font-size: 15px;
  }

  main {
    padding: 0 32px 100px;
  }

  .section {
    margin-top: 48px;
  }

  .section__header {
    margin-bottom: 24px;
  }

  .section__split {
    gap: 32px;
  }
}

/* ============================================
   Large Desktops: 1200px+
   ============================================ */
@media (min-width: 1200px) {
  .section__header {
    text-align: left;
  }

  .site-header,
  .site-footer__inner,
  main {
    max-width: 1400px;
  }

  .hero__layout {
    grid-template-columns: 2.2fr 1.6fr;
    gap: 48px;
  }

  .hero__content {
    padding: 40px;
  }

  .hero__title {
    font-size: 40px;
  }

  .hero__aside {
    padding: 32px;
  }

  .hero__aside-text {
    font-size: 17px;
  }

  .hero__aside-list {
    font-size: 17px;
  }

  .section__header h2 {
    font-size: 32px;
  }

  .feature-card,
  .stack-card {
    padding: 32px;
  }

  .feature-card h3,
  .stack-card h3 {
    font-size: 22px;
  }

  .contact-form__field input,
  .contact-form__field textarea {
    font-size: 16px;
    padding: 14px 18px;
  }

  .contact-form__field label {
    font-size: 16px;
  }

  .site-header {
    padding: 24px 40px 0;
  }

  .site-header__brand {
    gap: 24px;
  }

  .site-header__logo {
    font-size: 20px;
  }

  .site-header__title {
    font-size: 22px;
  }

  .site-header__subtitle {
    font-size: 13px;
  }

  .site-nav__list {
    gap: 24px;
  }

  .site-nav__list a {
    padding: 12px 20px;
    font-size: 16px;
  }

  main {
    padding: 0 40px 120px;
  }

  .section {
    margin-top: 56px;
  }

  .section__header {
    margin-bottom: 32px;
  }

  .section__split {
    gap: 40px;
  }

  .section__grid.to-grid[data-columns="3"] {
    gap: 32px;
  }

  .section__grid.to-grid[data-columns="2"] {
    gap: 32px;
  }
}

/* ============================================
   Ultra High Resolution: 1440px+
   ============================================ */
@media (min-width: 1440px) {
  .site-header,
  .site-footer__inner,
  main {
    max-width: 1600px;
  }

  .hero__layout {
    grid-template-columns: 2.4fr 1.8fr;
    gap: 56px;
  }

  .hero__content {
    padding: 48px;
  }

  .hero__title {
    font-size: 44px;
  }

  .hero__aside {
    padding: 40px;
  }

  .section__header h2 {
    font-size: 36px;
  }

  .feature-card,
  .stack-card {
    padding: 40px;
  }

  .feature-card h3,
  .stack-card h3 {
    font-size: 24px;
  }

  .site-header {
    padding: 28px 48px 0;
  }

  .site-header__logo {
    font-size: 22px;
  }

  .site-header__title {
    font-size: 24px;
  }

  .site-header__subtitle {
    font-size: 14px;
  }

  main {
    padding: 0 48px 140px;
  }

  .section {
    margin-top: 64px;
  }

  .section__header {
    margin-bottom: 40px;
  }

  .section__split {
    gap: 48px;
  }
}

/* ============================================
   Prevent Horizontal Scroll on All Devices
   ============================================ */
html,
body {
  overflow-x: hidden;
  max-width: 100vw;
}

*,
*::before,
*::after {
  max-width: 100%;
  box-sizing: border-box;
}

/* ============================================
   Touch Targets Optimization (Min 44x44px)
   ============================================ */
.to-button,
.site-nav__list a,
.site-footer__nav a,
.to-scroll-top,
.contact-form__field input,
.contact-form__field textarea {
  min-height: 44px;
  min-width: 44px;
}

.site-nav__toggle {
  min-width: 44px;
  min-height: 44px;
  width: 44px;
  height: 44px;
}

/* ============================================
   Responsive Typography with Fluid Scaling
   ============================================ */
.hero__title {
  font-size: clamp(24px, 5vw, 32px);
}

.section__header h2 {
  font-size: clamp(18px, 4vw, 22px);
}

@media (min-width: 768px) {
  .hero__title {
    font-size: clamp(28px, 4vw, 36px);
  }

  .section__header h2 {
    font-size: clamp(22px, 3.5vw, 28px);
  }
}

@media (min-width: 1024px) {
  .hero__title {
    font-size: clamp(32px, 3vw, 40px);
  }

  .section__header h2 {
    font-size: clamp(26px, 2.5vw, 32px);
  }
}

/* ============================================
   Responsive Images with Lazy Loading
   ============================================ */
img {
  max-width: 100%;
  height: auto;
  border: 0;
}

img[loading="lazy"] {
  opacity: 0;
  transition: opacity 0.4s ease;
}

img[loading="lazy"].loaded {
  opacity: 1;
}

/* ============================================
   Performance: Reduced Motion
   ============================================ */
@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;
  }

  .to-scroll-top {
    transition: none;
  }

  .site-nav {
    transition: none;
  }
}

/* ============================================
   Enhanced Responsive Grids and Layouts
   ============================================ */
@media (max-width: 639px) {
  .section__grid.to-grid[data-columns="3"] {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .section__grid.to-grid[data-columns="2"] {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .section__split {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero__actions {
    flex-direction: column;
    gap: 12px;
  }

  .hero__meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .contact__actions {
    gap: 12px;
  }

  .site-footer__inner {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .site-footer__nav {
    justify-content: center;
  }
}

@media (max-width: 479px) {
  .hero__layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero__content {
    padding: 20px;
  }

  .hero__aside {
    padding: 20px;
  }

  .site-header {
    padding: 12px 16px 0;
  }

  .site-header__brand {
    gap: 8px;
  }

  .site-header__logo {
    font-size: 12px;
  }

  .site-header__title {
    font-size: 14px;
  }

  .site-header__subtitle {
    font-size: 9px;
  }

  main {
    padding: 0 16px 60px;
  }

  .section {
    margin-top: 32px;
  }

  .section__header {
    margin-bottom: 16px;
  }

  .section__header h2 {
    font-size: 20px;
  }

  .hero__title {
    font-size: 24px;
  }

  .hero__subtitle {
    font-size: 13px;
  }

  .feature-card,
  .stack-card {
    padding: 16px;
  }

  .feature-card h3,
  .stack-card h3 {
    font-size: 16px;
  }

  .contact-form__field input,
  .contact-form__field textarea {
    font-size: 13px;
    padding: 8px 10px;
  }

  .contact-form__field label {
    font-size: 12px;
  }

  .to-button {
    padding: 12px 20px;
    font-size: 14px;
  }
}

/* ============================================
   Enhanced Touch Optimization for Mobile Devices
   ============================================ */
@media (hover: none) and (pointer: coarse) {
  .to-button,
  .site-nav__list a,
  .site-footer__nav a,
  .to-scroll-top {
    min-height: 48px;
    min-width: 48px;
  }

  .site-nav__toggle {
    min-width: 48px;
    min-height: 48px;
    width: 48px;
    height: 48px;
  }

  .contact-form__field input,
  .contact-form__field textarea {
    min-height: 48px;
  }

  .hero__actions .to-button {
    min-height: 48px;
  }

  .to-grid[data-columns="3"] .to-card,
  .to-grid[data-columns="2"] .to-card {
    min-height: auto;
  }
}

/* ============================================
   High DPI Displays Optimization
   ============================================ */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .site-header__logo {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }

  .to-avatar {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}

/* ============================================
   Landscape Mobile Optimization
   ============================================ */
@media (max-width: 767px) and (orientation: landscape) {
  .site-header {
    padding: 8px 16px 0;
  }

  .hero__layout {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .hero__content {
    padding: 16px;
  }

  .hero__aside {
    padding: 16px;
  }

  .section__header h2 {
    font-size: 20px;
  }

  .hero__title {
    font-size: 24px;
  }

  .site-nav__list a {
    padding: 12px 16px;
    font-size: 14px;
  }

  main {
    padding: 0 16px 60px;
  }

  .section {
    margin-top: 32px;
  }
}

/* ============================================
   Dark Mode Optimization for High Contrast
   ============================================ */
@media (prefers-color-scheme: dark) {
  .site-nav {
    background: rgba(10, 10, 15, 0.98);
  }

  .site-nav__list a:hover {
    background-color: var(--to-bg-tertiary);
  }

  .site-nav__list a[aria-current='page'] {
    background-color: var(--to-bg-tertiary);
  }
}

/* ============================================
   Focus Visible for Keyboard Navigation
   ============================================ */
@media (hover: hover) and (pointer: fine) {
  .to-button:focus-visible,
  .site-nav__list a:focus-visible,
  .site-footer__nav a:focus-visible,
  .to-scroll-top:focus-visible {
    outline: 2px solid var(--to-primary);
    outline-offset: 2px;
  }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
  .site-nav__toggle,
  .to-scroll-top {
    display: none !important;
  }

  .site-nav {
    position: static;
    transform: none;
    background: none;
    border: none;
  }

  body {
    background: white;
    color: black;
  }

  a {
    text-decoration: underline;
  }
}