:root {
  /* Typography scale (named): Minor third with fluid clamps for responsive rhythm. */
  --step--1: clamp(0.78rem, 0.74rem + 0.2vw, 0.92rem);
  --step-0: clamp(1rem, 0.96rem + 0.25vw, 1.1rem);
  --step-1: clamp(1.25rem, 1.16rem + 0.4vw, 1.5rem);
  --step-2: clamp(1.56rem, 1.42rem + 0.6vw, 1.95rem);
  --step-3: clamp(1.95rem, 1.72rem + 0.9vw, 2.5rem);
  --step-4: clamp(2.44rem, 2.12rem + 1.3vw, 3.3rem);
  --step-5: clamp(3.05rem, 2.6rem + 2vw, 4.2rem);

  --font-display: "Fraunces", "Iowan Old Style", "Times New Roman", serif;
  --font-body: "Karla", "Avenir", "Helvetica Neue", sans-serif;

  /* Spacing system: 4-8-12-16-24-32-48-64-96 with fluid clamps for scale. */
  --space-1: clamp(0.25rem, 0.22rem + 0.1vw, 0.35rem);
  --space-2: clamp(0.5rem, 0.45rem + 0.2vw, 0.7rem);
  --space-3: clamp(0.75rem, 0.68rem + 0.3vw, 0.95rem);
  --space-4: clamp(1rem, 0.9rem + 0.4vw, 1.3rem);
  --space-5: clamp(1.5rem, 1.3rem + 0.6vw, 2rem);
  --space-6: clamp(2rem, 1.7rem + 0.9vw, 2.8rem);
  --space-7: clamp(3rem, 2.5rem + 1.2vw, 4rem);
  --space-8: clamp(4rem, 3.4rem + 1.8vw, 5.5rem);
  --space-9: clamp(6rem, 5rem + 2.4vw, 8rem);

  /* Color system with grounded neutrals and warm accents. */
  --paper: #f4efe6;
  --ink: #182426;
  --ink-soft: #2d3c3a;
  --ink-deep: #1d2d2c;
  --paper-bright: #f7f1e8;
  --accent: #df6b42;
  --accent-dark: #b44e2f;
  --accent-2: #2a7f76;
  --mist: #d7d0c4;
  --line: rgba(24, 36, 38, 0.15);
  --shadow: 0 18px 45px rgba(24, 36, 38, 0.15);
  --accent-shadow: 0 12px 24px rgba(223, 107, 66, 0.35);

  /* Material tokens for consistent translucency. */
  --glass-card: rgba(244, 239, 230, 0.8);
  --glass-panel: rgba(255, 255, 255, 0.6);
  --glass-panel-strong: rgba(255, 255, 255, 0.75);
  --glass-nav: rgba(244, 239, 230, 0.9);
  --glass-mist: rgba(42, 127, 118, 0.12);
  --glass-accent: rgba(223, 107, 66, 0.12);
  --ghost-bg: rgba(24, 36, 38, 0.08);
  --paper-dim: rgba(247, 241, 232, 0.7);
  --paper-muted: rgba(247, 241, 232, 0.8);
  --orbit-line: rgba(247, 241, 232, 0.4);
  --tooltip-bg: #1c2a29;
  --tooltip-text: #f7f1e8;
  --tooltip-shadow: 0 12px 30px rgba(24, 36, 38, 0.28);
  --tooltip-radius: 14px;
  --tooltip-pad-y: 0.55rem;
  --tooltip-pad-x: 0.85rem;
  --tooltip-offset: 0.65rem;
  --tooltip-max: 220px;
  --tooltip-arrow: 10px;
  --border-soft: rgba(24, 36, 38, 0.1);
  --border-medium: rgba(24, 36, 38, 0.12);
  --grid-opacity: 0.3;
  --noise-opacity: 0.6;

  /* Layout primitives with rationale: radius + shadow define card language. */
  --radius-lg: 12px;
  --radius-md: 8px;
  --radius-pill: 999px;
  --container-width: 1140px; /* 1140px keeps long-form text readable. */

  /* Motion rules: no animation longer than 700ms; ease-out only for entry. */
  --duration-fast: 160ms;
  --duration-medium: 360ms;
  --duration-slow: 680ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.7, 0, 0.3, 1);
  --reveal-stagger: 70ms;
  --reveal-offset: 18px;
  --timeline-reveal-offset: 8px;
  --timeline-reveal-delay: 0ms;
  --timeline-reveal-duration: 360ms;

  /* Component sizing tokens to avoid one-off values. */
  --btn-pad-y: 0.7rem;
  --btn-pad-x: 1.4rem;
  --tag-pad-y: 0.2rem;
  --tag-pad-x: 0.7rem;
  --grid-size: calc(var(--space-6) * 1.1); /* grid texture echoes spacing scale */
  --orbit-size-lg: clamp(220px, 28vw, 260px);
  --orbit-size-sm: clamp(150px, 20vw, 180px);
  --nav-offset: calc(var(--space-6) + var(--space-4)); /* header height buffer */
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--ink);
  background: radial-gradient(circle at top right, #f7e9d9 0%, transparent 55%),
    radial-gradient(circle at 15% 25%, rgba(42, 127, 118, 0.22), transparent 60%),
    linear-gradient(150deg, #f4efe6 15%, #ebe4d9 55%, #f4efe6 100%);
  position: relative;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: var(--grid-size) var(--grid-size);
  opacity: var(--grid-opacity);
  pointer-events: none;
  z-index: -2;
}

.hidden {
  display: none;
}

.ambient {
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180' viewBox='0 0 180 180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.7' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='0.08'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
  opacity: var(--noise-opacity);
  pointer-events: none;
  z-index: -1;
}

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

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

.container {
  width: min(100% - 2 * var(--space-6), var(--container-width));
  margin: 0 auto;
}

.stack {
  display: grid;
  gap: var(--space-4);
}

.grid {
  display: grid;
  gap: var(--space-5);
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

.card {
  background: var(--glass-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--tag-pad-y) var(--tag-pad-x);
  border-radius: var(--radius-pill);
  background: var(--glass-mist);
  color: var(--accent-2);
  font-weight: 600;
  letter-spacing: 0.02em;
  font-size: var(--step--1);
  text-transform: uppercase;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--btn-pad-y) var(--btn-pad-x);
  border-radius: var(--radius-pill);
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  transition: transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

.btn.primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--accent-shadow);
}

.btn.outline {
  border-color: var(--ink);
  color: var(--ink);
}

.btn.ghost {
  border-color: transparent;
  color: var(--ink);
  background: var(--ghost-bg);
}

.btn:hover {
  transform: translateY(-2px);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: var(--glass-nav);
  border-bottom: 1px solid var(--border-medium);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
  gap: var(--space-4);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  --header-control-height: calc(2 * var(--btn-pad-y) + 1.6em + 2px);
}

.header-actions .btn.ghost {
  min-height: var(--header-control-height);
}

.logo {
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: var(--space-4);
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.nav-links a {
  position: relative;
  padding-bottom: 0.2rem;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--duration-fast) var(--ease-out);
}

.nav-links a:hover::after {
  width: 100%;
}

.lang-switch {
  display: inline-flex;
  align-items: stretch;
  gap: var(--space-1);
  padding: 0.2rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-pill);
  background: var(--glass-panel);
  height: var(--header-control-height);
}

.lang-btn {
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  min-width: 2.8rem;
  height: 100%;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.lang-btn.is-active {
  background: var(--ink-deep);
  color: var(--paper-bright);
}

.lang-btn:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}

.hero {
  padding: var(--space-7) 0 var(--space-6);
  scroll-margin-top: var(--nav-offset);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-7);
  align-items: stretch;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.eyebrow {
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent-2);
  font-weight: 600;
}

.display {
  font-family: var(--font-display);
  font-size: var(--step-5);
  line-height: 1.05;
  margin: var(--space-3) 0 var(--space-4);
}

.display .display-name {
  display: block;
}

.display .display-subtitle {
  display: block;
  font-size: var(--step-1);
  font-weight: 500;
  color: var(--ink-soft);
  margin-top: var(--space-3);
}

.lead {
  font-size: var(--step-1);
  margin: 0 0 var(--space-5);
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-3);
  margin-top: auto;
}

.meta-card {
  padding: var(--space-4);
  height: clamp(7.8rem, 10vw, 8.4rem);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  background: var(--glass-panel);
}

.meta-title {
  font-size: var(--step--1);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 var(--space-2);
  color: var(--accent-2);
  font-weight: 600;
}

.meta-value {
  margin: 0;
  font-weight: 600;
}

.hero-panel {
  display: grid;
  gap: var(--space-5);
}

.orbit-card {
  position: relative;
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background: var(--ink-deep);
  color: var(--paper-bright);
  overflow: hidden;
}

.orbit-ring {
  position: absolute;
  width: var(--orbit-size-lg);
  height: var(--orbit-size-lg);
  border: 1px dashed var(--orbit-line);
  border-radius: 50%;
  top: calc(var(--orbit-size-lg) * -0.46);
  right: calc(var(--orbit-size-lg) * -0.42);
}

.orbit-ring.ring-two {
  width: var(--orbit-size-sm);
  height: var(--orbit-size-sm);
  top: auto;
  bottom: calc(var(--orbit-size-sm) * -0.44);
  left: calc(var(--orbit-size-sm) * -0.22);
}

.orbit-center {
  position: relative;
  z-index: 1;
}

.orbit-label {
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: var(--step--1);
  margin: 0 0 var(--space-2);
  color: var(--paper-dim);
}

.orbit-title {
  font-family: var(--font-display);
  font-size: var(--step-2);
  margin: 0 0 var(--space-2);
}

.orbit-sub {
  margin: 0;
  font-size: var(--step--1);
}

.stats {
  gap: var(--space-3);
}

.stat-card {
  padding: var(--space-4);
  height: clamp(7.8rem, 10vw, 8.4rem);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  background: var(--glass-panel);
}

.stat-number {
  font-family: var(--font-display);
  font-size: var(--step-2);
  margin: 0 0 var(--space-2);
}

.stat-label {
  margin: 0;
  color: var(--ink-soft);
}

.section {
  padding: var(--space-6) 0;
  scroll-margin-top: var(--nav-offset);
}

.section-head {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  max-width: 720px;
}

.section h2 {
  font-family: var(--font-display);
  font-size: var(--step-4);
  margin: 0;
}

.section p {
  margin: 0;
  color: var(--ink-soft);
}

.work-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.work-card {
  display: grid;
  gap: var(--space-2);
}

.card-top {
  display: grid;
  gap: var(--space-2);
}

.card-top h3 {
  font-size: var(--step-1);
  margin: 0;
}

.card-top .tag {
  margin: 0;
  justify-self: start;
  width: fit-content;
  padding-inline: calc(var(--tag-pad-x) + var(--space-1));
  padding-top: 0;
  padding-bottom: 0;
  line-height: 2rem;
  height: 2.1rem;
  display: inline-flex;
  align-items: center;
}

.list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-2);
  font-size: var(--step--1);
}

.list li::before {
  content: "•";
  margin-right: var(--space-2);
  color: var(--accent);
}

.approach-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}

.step {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4);
}

.step-number {
  font-family: var(--font-display);
  color: var(--accent);
  font-size: var(--step-3);
  margin: 0;
}

.step h3 {
  margin: 0;
}

.step p {
  margin: 0;
}

.timeline {
  display: grid;
  gap: var(--space-4);
}

.timeline [data-reveal] {
  --reveal-offset: var(--timeline-reveal-offset);
  transition-duration: var(--timeline-reveal-duration);
  transition-delay: var(--timeline-reveal-delay);
}

.timeline-item {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
  background: var(--glass-panel-strong);
}

.timeline-item h3 {
  margin: 0 0 var(--space-2);
  font-size: var(--step-1);
}

.time {
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-2);
  margin: 0 0 var(--space-2);
}

.pill {
  align-self: flex-start;
  padding: var(--tag-pad-y) var(--tag-pad-x);
  border-radius: var(--radius-pill);
  background: var(--glass-accent);
  color: var(--accent-dark);
  font-size: var(--step--1);
  font-weight: 600;
}

.skills-grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.capabilities-card {
  grid-column: 1 / -1;
}

.tag-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-1);
}

.has-tooltip {
  position: relative;
  cursor: help;
}

.has-tooltip::after,
.has-tooltip::before {
  position: absolute;
  left: 50%;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -4px);
  transition: opacity var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.has-tooltip::after {
  content: attr(data-tooltip);
  bottom: calc(100% + var(--tooltip-offset));
  max-width: var(--tooltip-max);
  width: max-content;
  padding: var(--tooltip-pad-y) var(--tooltip-pad-x);
  border-radius: var(--tooltip-radius);
  background: var(--tooltip-bg);
  color: var(--tooltip-text);
  box-shadow: var(--tooltip-shadow);
  font-size: var(--step--1);
  line-height: 1.35;
  text-transform: none;
  letter-spacing: 0.01em;
  white-space: normal;
  text-align: left;
  z-index: 2;
}

.has-tooltip::before {
  content: "";
  bottom: calc(100% + var(--tooltip-offset) - var(--tooltip-arrow));
  border-width: var(--tooltip-arrow);
  border-style: solid;
  border-color: var(--tooltip-bg) transparent transparent transparent;
}

.has-tooltip:hover::after,
.has-tooltip:focus-visible::after,
.has-tooltip:hover::before,
.has-tooltip:focus-visible::before {
  opacity: 1;
  transform: translate(-50%, 0);
}

.award {
  margin-top: var(--space-4);
  font-weight: 600;
  font-size: var(--step--1);
  letter-spacing: 0.04em;
}

.award span {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent-2);
  margin-right: var(--space-2);
  font-weight: 700;
}

.contact {
  padding-bottom: var(--space-7);
}

.contact-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  background: var(--ink-deep);
  color: var(--paper-bright);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
}

.contact-card .btn.outline {
  border-color: var(--paper-bright);
  color: var(--paper-bright);
}

.contact-card p {
  color: var(--paper-muted);
}

.contact-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.site-footer {
  padding: var(--space-6) 0 var(--space-7);
  border-top: 1px solid var(--border-medium);
}

body.is-language-reloading :is(
    .card,
    .meta-card,
    .stat-card,
    .timeline-item,
    .orbit-card,
    .contact-card
  ) {
  will-change: transform, opacity, filter;
  animation: language-box-reload 620ms cubic-bezier(0.24, 0.88, 0.32, 1) both;
}

@keyframes language-box-reload {
  0% {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
  }
  28% {
    opacity: 0;
    transform: translateY(-8px) scale(0.991);
    filter: blur(1.1px);
  }
  48% {
    opacity: 0;
    transform: translateY(-8px) scale(0.991);
    filter: blur(0.95px);
  }
  50% {
    opacity: 0;
    transform: translateY(14px) scale(0.991);
    filter: blur(0.75px);
  }
  76% {
    opacity: 0.82;
    transform: translateY(3px) scale(0.9975);
    filter: blur(0.18px);
  }
  92% {
    opacity: 0.98;
    transform: translateY(0.4px) scale(0.9997);
    filter: blur(0.03px);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
  }
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-4);
  font-size: var(--step--1);
}

.footer-content p {
  margin-top: 0;
}

.footer-links {
  display: flex;
  gap: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(var(--reveal-offset));
  transition: opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
  transition-delay: calc(var(--reveal-stagger) * var(--delay-multiplier, 0));
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Reveal delay classes: multiples of --reveal-stagger for consistent rhythm. */
.reveal-delay-0 {
  --delay-multiplier: 0;
}

.reveal-delay-1 {
  --delay-multiplier: 1;
}

.reveal-delay-2 {
  --delay-multiplier: 2;
}

.reveal-delay-3 {
  --delay-multiplier: 3;
}

.reveal-delay-4 {
  --delay-multiplier: 4;
}

.reveal-delay-5 {
  --delay-multiplier: 5;
}

.reveal-delay-6 {
  --delay-multiplier: 6;
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none;
  }

  .timeline-item {
    flex-direction: column;
  }
}

@media (max-width: 720px) {
  .nav-bar {
    flex-wrap: wrap;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }

  .site-header .btn.ghost {
    width: auto;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-actions,
  .contact-actions {
    width: 100%;
  }

  .contact-card {
    padding: var(--space-5);
  }

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

  .meta-card,
  .stat-card {
    height: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation: none !important;
    transition-duration: 1ms !important;
  }
}