:root {
  color-scheme: dark;
  --bg: #0b0d12;
  --bg-spot-1: rgba(56, 68, 90, 0.45);
  --bg-spot-2: rgba(32, 40, 58, 0.35);
  --bg-spot-3: rgba(80, 92, 110, 0.2);
  --bg-deep: #07080b;
  --bg-line: rgba(170, 200, 230, 0.12);
  --bg-line-soft: rgba(110, 140, 170, 0.06);
  --bg-line-warm: rgba(200, 170, 130, 0.08);
  --surface: #15181d;
  --ink: #d9d9d9;
  --muted: #d9d9d9;
  --accent: #d9d9d9;
  --grid-line: rgba(245, 242, 234, 0.2);
  --panel-bg: rgba(9, 11, 16, 0.75);
  --panel-border: rgba(245, 242, 234, 0.18);
  --panel-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
  --billboard-slab: rgba(245, 242, 234, 0.08);
  --billboard-line: rgba(245, 242, 234, 0.18);
  --billboard-fade: rgba(245, 242, 234, 0.1);
  --gap: clamp(16px, 2.4vw, 28px);
  --side: clamp(20px, 6vw, 72px);
  --max: 1200px;
  --font-sans: "DM Mono", monospace;
  --font-mono: "DM Mono", monospace;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f4f1e9;
  --bg-spot-1: rgba(214, 204, 190, 0.5);
  --bg-spot-2: rgba(190, 180, 165, 0.35);
  --bg-spot-3: rgba(160, 150, 135, 0.2);
  --bg-deep: #e8e2d7;
  --bg-line: rgba(40, 60, 90, 0.14);
  --bg-line-soft: rgba(30, 45, 70, 0.06);
  --bg-line-warm: rgba(120, 90, 60, 0.08);
  --surface: #fbf8f2;
  --ink: #2f2f2f;
  --muted: #2f2f2f;
  --accent: #2f2f2f;
  --grid-line: rgba(255,255,255, 0.14);
  --panel-bg: rgba(250, 247, 241, 0.9);
  --panel-border: rgba(18, 18, 18, 0.12);
  --panel-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
  --billboard-slab: rgba(18, 18, 18, 0.08);
  --billboard-line: rgba(18, 18, 18, 0.18);
  --billboard-fade: rgba(18, 18, 18, 0.1);
}

* {
  box-sizing: border-box;
}

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

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--ink);
  background-color: var(--bg);
  overflow-x: hidden;
  isolation: isolate;
  transition: background-color 0.2s ease, color 0.2s ease;
}

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

a:hover {
  color: var(--accent);
  background: none;
}

/* text highlighting */
::selection {
  background-color: var(--ink);
  color: var(--surface);
}
/* cross browser */
::-moz-selection {
  background-color: var(--ink);
  color: var(--surface);
}

.about__portrait{
  width: 100%;
  height: auto;
  /* border-radius: 0.5rem; */
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  display: block;
}

.page {
  max-width: var(--max);
  margin: 0 auto;
  padding: var(--side);
  position: relative;
  z-index: 1;
  color: var(--ink);
}

.bg-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
  pointer-events: none;
}

.shader-panel {
  position: fixed;
  top: clamp(16px, 4vw, 36px);
  left: clamp(16px, 4vw, 36px);
  z-index: 2;
  width: min(22rem, 92vw);
  padding: 1rem 1rem 1.1rem;
  display: grid;
  gap: 0.75rem;
  border: 1px solid var(--panel-border);
  border-radius: 0.75rem;
  background-color: var(--panel-bg);
  color: var(--ink);
  font-family: var(--font-mono);
  box-shadow: var(--panel-shadow);
  backdrop-filter: blur(16px) saturate(1.1);
  pointer-events: auto;
  opacity: 0.01;
  transition: 300ms ease all;
}
.shader-panel:hover{
    opacity: 1;
  }


.shader-panel__title {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.28em;
  color: var(--muted);
}

.shader-panel__rows {
  display: grid;
  gap: 0.6rem;
}

.shader-panel__row {
  display: grid;
  grid-template-columns: minmax(5rem, 1fr) minmax(8rem, 1.4fr) auto;
  gap: 0.75rem;
  align-items: center;
}

.shader-panel__label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--muted);
}

.shader-panel__range {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
}

.shader-panel__color {
  width: 2.4rem;
  height: 1.6rem;
  padding: 0;
  border: 1px solid var(--panel-border);
  border-radius: 0.3rem;
  background-color: transparent;
  cursor: pointer;
}

.shader-panel__value {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}

.shader-panel__color::-webkit-color-swatch-wrapper {
  padding: 0;
}

.shader-panel__color::-webkit-color-swatch {
  border: none;
  border-radius: 0.2rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
  align-items: start;
}

.site-header {
  padding-bottom: clamp(16px, 4vw, 40px);
  align-items: center;
}

.site-header__brand {
  grid-column: 1 / span 8;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 20px);
}

.site-header__logo svg {
  width: clamp(52px, 6vw, 72px);
  height: auto;
  display: block;
}

.site-header__text {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.site-header__name {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 500;
}

.site-header__role {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--muted);
}

.site-header__toggle {
  grid-column: 9 / -1;
  justify-self: end;
  display: flex;
  align-items: center;
}

.site-billboard {
  position: relative;
  margin: clamp(24px, 5vw, 64px) 0;
  padding: clamp(18px, 4vw, 40px) 0;
}

.site-billboard::before {
  content: "";
  position: absolute;
  inset: 0;
  background: transparent;
  pointer-events: none;
}

.site-billboard__intro {
  grid-column: 1 / -1;
  display: contents;
}

.site-billboard__index {
  grid-column: 1 / span 2;
  align-self: center;
  font-size: clamp(0.85rem, 1.2vw, 1rem);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.site-billboard__text {
  grid-column: 3 / -1;
  font-size: clamp(1.1rem, 2.4vw, 2rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
}

:root[data-billboard="slab"] .site-billboard::before {
  background: var(--billboard-slab);
  border: 1px solid var(--billboard-line);
}

:root[data-billboard="line"] .site-billboard {
  padding: 0;
  margin: clamp(12px, 3vw, 32px) 0 clamp(32px, 6vw, 72px);
}

:root[data-billboard="line"] .site-billboard::before {
  inset: auto 0 0 0;
  height: 1px;
  background: var(--billboard-line);
}

:root[data-billboard="line"] .site-billboard__intro,
:root[data-billboard="fade"] .site-billboard__intro {
  display: none;
}

:root[data-billboard="fade"] .site-billboard {
  padding: clamp(28px, 6vw, 72px) 0;
}

:root[data-billboard="fade"] .site-billboard::before {
  background: linear-gradient(
    180deg,
    transparent 0%,
    var(--billboard-fade) 50%,
    transparent 100%
  );
}

:root[data-billboard="type"] .site-billboard::before {
  background: transparent;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 0px solid currentColor;
  background-color: transparent;
  /* add bright shadow */
  box-shadow: 0 0 8px 2px rgba(240,240,240, 0.12);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
  border-radius: 999px;
  transition: box-shadow 0.15s ease;
}

.theme-toggle:hover{
  box-shadow: 0 0 12px 3px rgba(240,240,240, 0.2);
}

.theme-toggle__icon {
  width: 1.35rem;
  height: 1.35rem;
  display: block;
}

.theme-toggle__sun,
.theme-toggle__moon {
  fill: currentColor;
  transform-origin: center;
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.theme-toggle__moon-cut {
  fill: black;
  transition: transform 0.35s ease;
  transform-origin: center;
}

:root[data-theme="light"] .theme-toggle__sun {
  opacity: 1;
  transform: scale(1);
}

:root[data-theme="light"] .theme-toggle__moon {
  opacity: 0;
  transform: scale(0.65) rotate(-12deg);
}

:root[data-theme="light"] .theme-toggle__moon-cut {
  transform: translate(2px, -1px);
}

:root[data-theme="dark"] .theme-toggle__sun {
  opacity: 0;
  transform: scale(0.6) rotate(12deg);
}

:root[data-theme="dark"] .theme-toggle__moon {
  opacity: 1;
  transform: scale(1);
}

:root[data-theme="dark"] .theme-toggle__moon-cut {
  transform: translate(0, 0);
}

.theme-toggle:hover {
  border-color: var(--accent);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}


.section__label, .capability__num {
  grid-column: 1 / span 2;
  font-family: var(--font-mono);
  font-size: clamp(0.85rem, 1.2vw, 1rem);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.about,
.contact {
  margin-top: clamp(32px, 6vw, 72px);
  padding-top: clamp(20px, 4vw, 40px);
}

section{
  /* backdrop-filter: blur(8px); */
  margin-bottom: 3rem;
}

hr{
  border: none;
  border-top: 1px solid var(--grid-line);
  margin: clamp(32px, 6vw, 72px) 0;
}

.about__copy,
.contact__copy {
  grid-column: 3 / span 6;
  font-size: 1rem;
  line-height: 1.6;
}

.about__copy p,
.contact__copy p {
  margin: 0 0 1rem;
}

.about__copy p:last-child,
.contact__copy p:last-child {
  margin-bottom: 0;
}

.about__details {
  grid-column: 9 / -1;
  display: grid;
  gap: 1rem;
  align-content: start;
}

.detail {
  display: grid;
  gap: 0.25rem;
}

.detail__k {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.detail__v {
  font-size: 0.875rem;
  color: var(--ink);
}

.contact__copy {
  color: var(--muted);
}

.contact__links {
  grid-column: 3 / span 6;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.contact__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--grid-line);
  background-color: var(--transparent);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

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

.contact__note {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.capabilities {
  margin-top: clamp(32px, 7vw, 96px);
  display: grid;
  gap: clamp(20px, 4vw, 36px);
}

.capability {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
  padding-bottom: clamp(16px, 3vw, 26px);
  align-items: start;
}

.capability__num {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1, "lnum" 1;
}

.capability__title {
  grid-column: 3 / span 4;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.capability__desc {
  grid-column: 7 / -1;
  font-size: 1rem;
  color: var(--muted);
  max-width: 60ch;
}

.capability__tools {
  grid-column: 7 / -1;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.capability__tools .tool-sep {
  color: var(--bg-line);
  /* font-weight: 600; */
}

.tool-slot {
  --tool-shift: 1.2em;
  display: inline-grid;
  align-items: end;
  justify-items: start;
  height: 1.2em;
  line-height: 1.2;
  overflow: hidden;
  white-space: nowrap;
  vertical-align: bottom;
  position: relative;
  transition: width 0.9s ease;
}

.tool-slot__word {
  grid-area: 1 / 1;
  white-space: nowrap;
}

.tool-slot__letter {
  display: inline-block;
  transition: transform 0.9s ease, opacity 0.9s ease;
  transform: translateY(0);
  opacity: 1;
  white-space: pre;
}

.tool-slot__letter:not(:last-child):not(.tool-slot__letter--space) {
  margin-right: 0.12em;
}

.tool-slot__word--next .tool-slot__letter {
  transform: translateY(var(--tool-shift));
  opacity: 0;
}

.tool-slot__word--out .tool-slot__letter {
  transform: translateY(calc(-1 * var(--tool-shift)));
  opacity: 0;
}

.tool-slot__word--in .tool-slot__letter {
  transform: translateY(0);
  opacity: 1;
}

.tool-slot--animating {
  overflow: visible;
  z-index: 1;
}

.tool-sep {
  display: inline-block;
}


.footer {
  margin-top: clamp(36px, 8vw, 120px);
  padding-top: clamp(20px, 6vw, 60px);
}

.footer__col {
  grid-column: span 3;
  display: grid;
  gap: 0.4rem;
  align-content: start;
}
.footer__col:first-child {
  grid-column: span 2;
}

.footer__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--muted);
  margin-bottom: 1rem;
}

.footer__value {
  font-size: 0.9rem;
  color: var(--ink);
}

.footer__time {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.footer__note {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.sun-graph {
  margin-top: 0.5rem;
  width: min(12rem, 100%);
}

.sun-graph__svg {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}

.sun-graph__path,
.sun-graph__horizon {
  stroke: var(--grid-line);
  stroke-width: 3.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  opacity: 0.85;
}

.sun-graph__horizon {
  stroke-width: 2.8;
  opacity: 0.7;
}

.sun-graph__sun-group {
  pointer-events: none;
}

.sun-graph__sun-glow {
  fill: var(--accent);
  opacity: 0.35;
}

.sun-graph__sun {
  fill: var(--accent);
  stroke: var(--accent);
}

.sun-graph__svg[data-night="true"] .sun-graph__sun {
  opacity: 0.25;
}

.sun-graph__svg[data-night="true"] .sun-graph__sun-glow {
  opacity: 0;
}

.sun-debug {
  margin-top: 0.6rem;
  display: grid;
  gap: 0.35rem;
}

.sun-debug__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sun-debug__label {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.sun-debug__toggle {
  border: 1px solid var(--grid-line);
  background: transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 0.25rem 0.55rem;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.sun-debug__toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.sun-debug__toggle:disabled {
  opacity: 0.4;
  cursor: default;
}

.sun-debug__range {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
}

.sun-debug__value {
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.footer__link {
  position: relative;
  width: fit-content;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-weight: 600;
  color: var(--ink);
}

.footer__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.2rem;
  width: 100%;
  height: 1px;
  background-color: currentColor;
  opacity: 0.45;
  transform: scaleX(0.45);
  transform-origin: left;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.footer__link:hover::after {
  transform: scaleX(1);
  opacity: 1;
}

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

.reveal {
  opacity: 0;
  transform: translateY(12px);
  animation: rise 0.7s ease forwards;
  animation-delay: var(--d, 0s);
}

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .site-header {
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .site-header__brand,
  .site-header__toggle {
    grid-column: auto;
  }

  .site-header__toggle {
    justify-self: end;
    margin-top: 0;
  }

  .site-billboard__index,
  .site-billboard__text {
    grid-column: 1 / -1;
  }

  .site-billboard__text {
    margin-top: 0.4rem;
  }

  .section__label,
  .about__copy,
  .about__details,
  .contact__copy,
  .contact__links {
    grid-column: 1 / -1;
  }

  .about__details {
    margin-top: 1.5rem;
  }

  .capability__title {
    grid-column: 3 / span 6;
  }

  .capability__desc,
  .capability__tools {
    grid-column: 3 / -1;
  }

  .footer__col {
    grid-column: span 6;
  }
}

@media (max-width: 720px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .site-header {
    grid-template-columns: 1fr auto;
    align-items: center;
  }

  .site-header__brand,
  .site-header__toggle {
    grid-column: auto;
  }

  .section__label,
  .about__copy,
  .about__details,
  .contact__copy,
  .contact__links {
    grid-column: 1 / -1;
  }

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

  .capability__num,
  .capability__title,
  .capability__desc,
  .capability__tools,
  .footer__col {
    grid-column: 1 / -1;
  }

  .capability__title {
    margin-top: 6px;
  }

  .capability__desc {
    margin-top: 12px;
  }

  .footer__col {
    margin-top: 10px;
  }

  .contact__links {
    align-items: stretch;
  }

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

  .shader-panel {
    left: var(--side);
    right: var(--side);
    top: auto;
    bottom: var(--side);
    width: auto; 
  }

  .shader-panel__row {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "label value"
      "control control";
  }

  .shader-panel__label {
    grid-area: label;
  }

  .shader-panel__value {
    grid-area: value;
    justify-self: end;
  }

  .shader-panel__range,
  .shader-panel__color {
    grid-area: control;
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    animation: none;
    opacity: 1;
    transform: none;
  }
}