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

html,
body {
  margin: 0;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

/* ---------- Design tokens (Nocturne) ---------- */
:root {
  --color-bg: #161826;
  --color-surface: #232532;
  --color-text: #e9e9ed;
  --color-accent: #9184d9;
  --color-divider: color-mix(in srgb, #e9e9ed 16%, transparent);

  --color-neutral-100: #f3f5fe;
  --color-neutral-400: #b2b6ca;
  --color-neutral-500: #9397ab;
  --color-neutral-800: #3f424d;

  --color-accent-100: #f5f4ff;
  --color-accent-800: #423a6a;

  --font-heading: "Inter", system-ui, sans-serif;
  --font-heading-weight: 500;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, monospace;

  --space-1: 2.8px;
  --space-2: 5.6px;
  --space-3: 8.4px;
  --space-4: 11.2px;
  --space-6: 16.8px;
  --space-8: 22.4px;

  --radius-md: 8px;

  color-scheme: dark;
}

[data-theme="light"] {
  --color-bg: #f3f5fe;
  --color-surface: #e4e7f5;
  --color-text: #292b31;
  --color-divider: color-mix(in srgb, #292b31 14%, transparent);
  --color-neutral-400: #595d6c;
  --color-neutral-500: #75798c;

  color-scheme: light;
}

/* ---------- Base ---------- */
body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  font-weight: 400;
  transition: background-color 0.2s ease, color 0.2s ease;
}

h1,
h3 {
  font-family: var(--font-heading);
  font-weight: var(--font-heading-weight);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  text-underline-offset: 3px;
}

.mono {
  font-family: var(--font-mono);
}

:focus {
  outline: none;
}

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

::selection {
  background: color-mix(in srgb, var(--color-accent) 30%, transparent);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: var(--color-bg);
  padding: var(--space-2) var(--space-3);
  z-index: 100;
  border-radius: var(--radius-md);
}

.skip-link:focus {
  left: var(--space-3);
  top: var(--space-3);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- Layout ---------- */
.page {
  max-width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 48px;
  padding: 64px 32px 96px;
  min-height: 100vh;
}

/* ---------- Nav rail ---------- */
.rail {
  position: sticky;
  top: 64px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rail-item {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-neutral-500);
  cursor: pointer;
  transition: color 0.15s;
}

.rail-item:hover,
.rail-item:focus-visible {
  color: var(--color-accent);
}

#theme-toggle {
  margin-top: 24px;
  text-align: left;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-neutral-500);
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  transition: color 0.15s;
}

#theme-toggle:hover,
#theme-toggle:focus-visible {
  color: var(--color-accent);
}

/* ---------- Content ---------- */
.content {
  display: flex;
  flex-direction: column;
  gap: 64px;
  min-width: 0;
}

.eyebrow {
  font-size: 11px;
  color: var(--color-neutral-500);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ---------- Intro ---------- */
.intro {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.intro-eyebrow {
  font-size: 12px;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.intro h1 {
  font-size: 38px;
  max-width: 600px;
}

.bio {
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-neutral-400);
  max-width: 560px;
  margin: 0;
}

.intro-actions {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: var(--font-heading-weight);
  font-size: 14px;
  line-height: 1.2;
  color: var(--color-text);
  background: transparent;
  border: 1px solid transparent;
  padding: var(--space-2) calc(var(--space-3) * 1.2);
  border-radius: var(--radius-md);
}

.btn-primary {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
}

.btn-primary:active {
  background: color-mix(in srgb, var(--color-accent) 22%, transparent);
}

.btn-secondary {
  border-color: var(--color-divider);
}

.btn-secondary:hover {
  background: color-mix(in srgb, var(--color-text) 7%, transparent);
}

.btn-secondary:active {
  background: color-mix(in srgb, var(--color-text) 14%, transparent);
}

/* ---------- Work / project cards ---------- */
.work {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.cards {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.proj-card {
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--color-surface);
}

.proj-card[hidden] {
  display: none;
}

.proj-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.proj-kicker {
  font-size: 11px;
  color: var(--color-accent);
}

.proj-view {
  font-size: 11px;
  color: var(--color-neutral-500);
}

.work-toggle {
  align-self: flex-start;
}

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

.proj-card h3 {
  font-size: 21px;
}

.proj-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-neutral-400);
}

.tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.tag {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  letter-spacing: 0.02em;
  padding: 3px 10px;
  border-radius: calc(var(--radius-md) * 0.75);
}

.tag-outline {
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
}

.tag-neutral {
  background: var(--color-neutral-800);
  color: var(--color-neutral-100);
  justify-content: flex-start;
}

/* ---------- Skills ---------- */
.skills {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.skill-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.skill-group-label {
  font-size: 11px;
  color: var(--color-neutral-500);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.skill-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px 16px;
}

/* ---------- Experience ---------- */
.experience {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.experience .eyebrow {
  margin-bottom: 12px;
}

.exp-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-divider);
}

.exp-row:last-child {
  border-bottom: none;
}

.exp-date {
  font-size: 12px;
  color: var(--color-neutral-500);
  font-variant-numeric: tabular-nums;
}

.exp-role {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}

.exp-company {
  color: var(--color-neutral-400);
  font-weight: 400;
}

/* ---------- Contact ---------- */
.contact {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-divider);
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.contact-links a {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  color: var(--color-text);
}

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

.contact-label {
  color: var(--color-neutral-500);
  font-size: 12px;
}

/* ---------- Responsive ---------- */
@media (max-width: 700px) {
  .page {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px 20px 64px;
  }

  .rail {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    row-gap: 12px;
    column-gap: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-divider);
  }

  #theme-toggle {
    margin-top: 0;
    margin-left: auto;
  }

  .content {
    gap: 40px;
  }

  .intro h1 {
    font-size: 32px;
  }

  .skill-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .exp-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

@media (max-width: 420px) {
  .skill-grid {
    grid-template-columns: 1fr;
  }

  .intro-actions {
    flex-direction: column;
    align-items: flex-start;
  }
}