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

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

img, picture, svg, video {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
}

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

ul, ol {
  list-style: none;
  padding: 0;
}

table {
  border-collapse: collapse;
}


/*
  Theme contract: every template/component must only use the semantic
  custom properties defined here (--color-*, --radius, --shadow, --font-*).
  Adding a 4th theme means adding one more [data-theme="…"] block below —
  no template markup should ever need to change.
*/

:root,
[data-theme="epure"] {
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-surface-alt: #f0f0ee;
  --color-text: #1a1a1a;
  --color-text-muted: #5c5c5c;
  --color-accent: #2a6f6f;
  --color-accent-strong: #1e5252;
  --color-accent-contrast: #ffffff;
  --color-border: #e4e4e4;
  --color-border-strong: #cfcfcf;

  --radius: 4px;
  --radius-lg: 4px;
  --shadow-card: none;
  --shadow-raised: 0 1px 2px rgba(0, 0, 0, 0.06);

  --font-heading: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --heading-weight: 600;
  --heading-tracking: -0.01em;
}

[data-theme="corporate"] {
  --color-bg: #f4f6f9;
  --color-surface: #ffffff;
  --color-surface-alt: #eaeef4;
  --color-text: #16233d;
  --color-text-muted: #4b5a75;
  --color-accent: #1d6fa5;
  --color-accent-strong: #0b2545;
  --color-accent-contrast: #ffffff;
  --color-border: #d9dfe7;
  --color-border-strong: #b7c2d1;

  --radius: 8px;
  --radius-lg: 12px;
  --shadow-card: 0 1px 3px rgba(11, 37, 69, 0.08), 0 1px 2px rgba(11, 37, 69, 0.05);
  --shadow-raised: 0 8px 24px rgba(11, 37, 69, 0.12);

  --font-heading: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --heading-weight: 700;
  --heading-tracking: -0.01em;
}

[data-theme="dev"] {
  --color-bg: #0d1117;
  --color-surface: #161b22;
  --color-surface-alt: #1c2129;
  --color-text: #e6edf3;
  --color-text-muted: #8b949e;
  --color-accent: #39d2c0;
  --color-accent-strong: #7ee787;
  --color-accent-contrast: #04201c;
  --color-border: #30363d;
  --color-border-strong: #444c56;

  --radius: 6px;
  --radius-lg: 10px;
  --shadow-card: 0 0 0 1px var(--color-border);
  --shadow-raised: 0 0 0 1px rgba(57, 210, 192, 0.25), 0 12px 32px rgba(0, 0, 0, 0.5);

  --font-heading: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --heading-weight: 600;
  --heading-tracking: 0;
}


:root {
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4rem;
  --space-12: 6rem;

  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.375rem;
  --text-2xl: 1.75rem;
  --text-3xl: 2.25rem;
  --text-4xl: 3rem;

  --max-width: 72rem;
  --max-width-prose: 42rem;
  --transition: 160ms ease;
}

html {
  color-scheme: light dark;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  transition: background-color var(--transition), color var(--transition);
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: var(--heading-weight);
  letter-spacing: var(--heading-tracking);
  line-height: 1.15;
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); margin-top: var(--space-10); }
h3 { font-size: var(--text-xl); margin-top: var(--space-6); }

p { margin-top: var(--space-4); }
p:first-child { margin-top: 0; }

a {
  color: var(--color-accent);
  text-underline-offset: 0.15em;
}

a:hover {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.prose {
  max-width: var(--max-width-prose);
}

.prose > * + * {
  margin-top: var(--space-4);
}

.prose ul,
.prose ol {
  list-style: disc;
  padding-inline-start: 1.25em;
}

.prose ol {
  list-style: decimal;
}

section {
  padding-block: var(--space-10);
}

.section-tight {
  padding-block: var(--space-8);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  padding: var(--space-2) var(--space-4);
  z-index: 100;
  border-radius: 0 0 var(--radius) 0;
}

.skip-link:focus {
  left: 0;
}

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

@media (min-width: 48rem) {
  h1 { font-size: 3.5rem; }
}


/* Header / nav */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-4);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--heading-weight);
  font-size: var(--text-lg);
  color: var(--color-text);
}

.brand:hover {
  text-decoration: none;
}

.brand__logo {
  width: 2rem;
  height: 2rem;
  color: var(--color-accent);
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  font-size: var(--text-sm);
}

.nav-links a {
  color: var(--color-text-muted);
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--color-text);
  text-decoration: none;
}

.nav-links a[aria-current="page"] {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
}

/* Mobile nav (progressive enhancement via <details>, no JS required) */

.mobile-nav {
  display: none;
}

.mobile-nav summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius);
  color: var(--color-text);
}

.mobile-nav summary::-webkit-details-marker {
  display: none;
}

.mobile-nav summary svg {
  width: 1.1rem;
  height: 1.1rem;
}

.mobile-nav[open] summary {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.mobile-nav__panel {
  position: fixed;
  left: 0;
  right: 0;
  top: var(--header-height, 4.25rem);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-5) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.mobile-nav__panel a {
  padding-block: var(--space-2);
  font-size: var(--text-lg);
  color: var(--color-text);
}

.mobile-nav__panel a[aria-current="page"] {
  color: var(--color-accent);
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.65em 1.25em;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: var(--text-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

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

.btn-primary:hover {
  background: var(--color-accent-strong);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

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

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

/* Cards */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--space-6);
}

.card-grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  margin-top: var(--space-8);
}

.card h3 {
  margin-top: 0;
}

.card__icon {
  width: 2.5rem;
  height: 2.5rem;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

/* Hero */

.hero {
  padding-block: var(--space-12) var(--space-10);
}

.hero__tagline {
  font-size: var(--text-xl);
  color: var(--color-text-muted);
  max-width: var(--max-width-prose);
  margin-top: var(--space-4);
}

/* Value props */

.value-list {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
  margin-top: var(--space-8);
}

.value-list li {
  padding-left: var(--space-6);
  position: relative;
}

.value-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 0.6em;
  height: 0.6em;
  border-radius: 50%;
  background: var(--color-accent);
}

/* Client strip */

.client-strip {
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.client-strip__label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.client-strip__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-6);
  margin-top: var(--space-3);
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-text-muted);
}

/* Timeline (CV) */

.timeline {
  margin-top: var(--space-8);
  border-left: 2px solid var(--color-border);
  padding-left: var(--space-6);
}

.timeline-entry {
  position: relative;
  padding-bottom: var(--space-8);
}

.timeline-entry:last-child {
  padding-bottom: 0;
}

.timeline-entry::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-6) - 6px);
  top: 0.4em;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-bg);
}

.timeline-entry__dates {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
}

.timeline-entry h3 {
  margin-top: var(--space-1);
}

.timeline-entry__org {
  color: var(--color-text-muted);
  font-weight: 500;
}

.timeline-entry__stack {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  margin-top: var(--space-2);
}

.timeline-entry ul {
  margin-top: var(--space-2);
  list-style: disc;
  padding-inline-start: 1.2em;
}

.timeline-entry li {
  margin-top: 0.3em;
}

.timeline-earlier {
  margin-top: var(--space-6);
}

.timeline-earlier summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  padding: var(--space-2) 0;
}

.timeline-earlier[open] summary {
  margin-bottom: var(--space-2);
}

/* Contact block */

.contact-block {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-8);
  margin-top: var(--space-6);
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 0.2em;
}

.contact-item__label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.contact-item__value {
  font-weight: 600;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-12);
  padding-block: var(--space-8);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.site-footer__meta {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.site-footer__meta a {
  color: var(--color-text-muted);
}

.site-footer__controls {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  flex-wrap: wrap;
}

/* Theme toggle */

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 2px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
}

.theme-toggle button {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-family: var(--font-mono);
  padding: 0.35em 0.9em;
  border-radius: 999px;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition);
}

.theme-toggle button:hover {
  color: var(--color-text);
}

.theme-toggle button[aria-pressed="true"] {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
}

/* Language switch */

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.social-links {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  color: var(--color-text-muted);
}

.social-links a:hover {
  color: var(--color-text);
  text-decoration: none;
}

.social-links svg {
  width: 1.5rem;
  height: 1.5rem;
}

.lang-switch {
  display: inline-flex;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-family: var(--font-mono);
}

.lang-switch a {
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.lang-switch a[aria-current="true"] {
  color: var(--color-accent);
  font-weight: 700;
}

/* Structured fact grids (CV competencies, personal info, legal-style dl) */

.legal-grid {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-8);
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}

.legal-grid dt {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.legal-grid dd {
  margin-top: 0.25em;
}

@media (max-width: 47.99rem) {
  .nav-links {
    display: none;
  }

  .mobile-nav {
    display: block;
    position: relative;
  }
}


/* Home */

.hero-home h1 {
  max-width: 18ch;
}

.engagement-models {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  margin-top: var(--space-6);
}

/* Services */

.service-card__index {
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* Profile */

.profile-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
}

.highlight-list {
  margin-top: var(--space-8);
  display: grid;
  gap: var(--space-5);
}

.highlight-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
  align-items: start;
}

.highlight-list__num {
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-size: var(--text-lg);
}

.skills-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.skills-tags span {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.3em 0.9em;
  color: var(--color-text-muted);
}

/* CV */

@media print {
  .site-header, .site-footer, .btn-row {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .timeline {
    border-left-color: #ccc;
  }
}