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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background 0.35s ease, color 0.35s ease;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.2;
  color: var(--color-primary-dark);
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-4);
}

h1 { font-size: var(--text-3xl); font-weight: 400; }
h2 { font-size: var(--text-2xl); margin-top: var(--space-8); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

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

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--transition-base);
}

a:hover { color: var(--color-primary-hover); }

a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 2px;
}

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

ul, ol { padding-left: 1.25rem; margin: 0 0 var(--space-4); }
li { margin-bottom: var(--space-2); }

::selection { background: var(--color-primary); color: var(--color-bg); }


.skip-link {
  position: absolute;
  left: -10000px;
  top: auto;
}
.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
  background: var(--color-primary);
  color: var(--color-bg);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: 100;
}


.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.container--wide {
  max-width: var(--content-wide);
}

section {
  padding: var(--space-8) 0;
}

section + section {
  border-top: 1px solid var(--color-border);
}


.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(243, 237, 226, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-border);
  transition: background 0.35s ease, border-color 0.35s ease;
}

[data-theme="dark"] .nav {
  background: rgba(30, 24, 20, 0.92);
}

.nav__inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.nav__brand {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-primary-dark);
  text-decoration: none;
}

.nav__brand:hover { color: var(--color-primary); }

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav__links a {
  color: var(--color-primary-dark);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
}

.nav__links a:hover {
  color: var(--color-primary);
}

.nav__lang {
  display: inline-flex;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 2px;
  gap: 2px;
}

.nav__lang button {
  appearance: none;
  background: transparent;
  border: 0;
  padding: var(--space-1) var(--space-3);
  font: inherit;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-muted);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--transition-base), color var(--transition-base);
}

.nav__lang button:hover { color: var(--color-primary-dark); }

.nav__lang button[aria-pressed="true"] {
  background: var(--color-primary);
  color: var(--color-bg);
}

.nav__toggle {
  display: none;
  appearance: none;
  background: transparent;
  border: 0;
  padding: var(--space-2);
  cursor: pointer;
  color: var(--color-primary-dark);
}

@media (max-width: 720px) {
  .nav__toggle { display: block; }
  .nav__links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: none;
  }
  .nav__links.is-open { display: flex; }
}


.hero {
  position: relative;
  padding-top: var(--space-9);
  padding-bottom: var(--space-8);
  overflow: hidden;
  min-height: 420px;
}


.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("../assets/img/hero-bg.png") center center / cover no-repeat;
  opacity: 0.07;
  filter: grayscale(30%);
  pointer-events: none;
  z-index: 0;
}


.hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to bottom, transparent, var(--color-bg));
  pointer-events: none;
  z-index: 0;
}

.hero > .container {
  position: relative;
  z-index: 1;
}

.hero__inner {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--space-7);
}

.hero__photo {
  width: 130px;
  height: 130px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 3px solid var(--color-surface);
  box-shadow: var(--shadow-md);
  background: var(--color-border);
  flex-shrink: 0;
}

.hero__text {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.hero__eyebrow {
  font-size: var(--text-xs);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0;
}

.hero__title {
  font-size: var(--text-3xl);
  margin: 0;
  line-height: 1.15;
}

.hero__tagline {
  font-size: var(--text-base);
  color: var(--color-muted);
  max-width: 48ch;
  margin: 0;
  line-height: 1.55;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-2);
}


@media (max-width: 600px) {
  .hero__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-5);
  }
  .hero__photo {
    width: 100px;
    height: 100px;
  }
}


.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font: inherit;
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
}

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

.btn--primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: var(--color-bg);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--secondary {
  background: transparent;
  color: var(--color-primary-dark);
  border-color: var(--color-border);
}

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


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

.skills__group h3 {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  margin: 0 0 var(--space-3);
  font-family: var(--font-body);
  font-weight: 600;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
  margin: 0;
}

.chip {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  color: var(--color-primary-dark);
  margin: 0;
}


.project-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.project-expand {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.project-expand[open] {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.project-expand__summary {
  padding: var(--space-5);
  cursor: pointer;
  list-style: none;
}

.project-expand__summary::-webkit-details-marker { display: none; }

.project-expand__summary::marker { content: ""; }

.project-expand__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2) var(--space-4);
  margin-bottom: var(--space-2);
}

.project-expand__head h3 {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  color: var(--color-primary-dark);
  margin: 0;
}

.project-expand__sub {
  font-size: var(--text-sm);
  color: var(--color-muted);
  font-style: italic;
}

.project-expand__date {
  font-size: var(--text-xs);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  margin-left: auto;
}

.project-expand__desc {
  font-size: var(--text-sm);
  color: var(--color-text);
  margin: 0;
  line-height: 1.6;
}

.project-expand__body {
  padding: 0 var(--space-5) var(--space-5);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
}

.project-expand__body p {
  font-size: var(--text-sm);
  line-height: 1.65;
}

.project-expand__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}


.project-subpage {
  padding: var(--space-7) 0;
}

.project-subpage__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}

.project-subpage__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}


.awards-list {
  list-style: none;
  padding: 0;
  margin: var(--space-5) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.award-item {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.award-item__title {
  font-family: var(--font-heading);
  font-weight: 500;
  color: var(--color-primary-dark);
}

.award-item__where {
  font-size: var(--text-xs);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.award-item__note {
  width: 100%;
  font-size: var(--text-sm);
  color: var(--color-muted);
  margin-top: var(--space-1);
}


.timeline {
  list-style: none;
  padding: 0;
  margin: var(--space-5) 0 0;
  border-left: 2px solid var(--color-border);
}

.timeline__item {
  position: relative;
  padding: 0 0 var(--space-6) var(--space-5);
  margin: 0;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 8px;
  width: 12px;
  height: 12px;
  background: var(--color-primary);
  border: 2px solid var(--color-bg);
  border-radius: var(--radius-full);
}

.timeline__date {
  font-size: var(--text-xs);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.timeline__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  color: var(--color-primary-dark);
  margin: var(--space-1) 0;
}

.timeline__org {
  font-size: var(--text-sm);
  color: var(--color-muted);
  margin: 0 0 var(--space-2);
}

.timeline__item ul {
  margin: var(--space-2) 0 0;
  padding-left: 1.1rem;
  font-size: var(--text-sm);
}


.contact-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  list-style: none;
  padding: 0;
  margin: var(--space-5) 0 0;
}

.contact-list a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-size: var(--text-sm);
  color: var(--color-primary-dark);
  font-weight: 500;
  transition: all var(--transition-base);
}

.contact-list a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}


.cv-header {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.cv-section {
  margin-bottom: var(--space-7);
}

.cv-section h2 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  margin-top: 0;
}

.cv-entry {
  margin-bottom: var(--space-5);
}

.cv-entry__head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.cv-entry__title {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-primary-dark);
  margin: 0;
}

.cv-entry__date {
  font-size: var(--text-xs);
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.cv-entry__sub {
  font-size: var(--text-sm);
  color: var(--color-muted);
  margin: 0 0 var(--space-2);
  font-style: italic;
}


.footer {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-border);
  font-size: var(--text-sm);
  color: var(--color-muted);
  text-align: center;
}

.footer p { margin: 0; }


.theme-toggle {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-muted);
  cursor: pointer;
  transition: background 0.35s ease, border-color 0.35s ease, color 0.25s ease, transform 0.2s ease;
  flex-shrink: 0;
}

.theme-toggle:hover {
  transform: scale(1.08);
  border-color: var(--color-primary);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  position: absolute;
  transition: opacity 0.3s ease, transform 0.3s ease;
}


.theme-toggle .icon-sun  { opacity: 1; transform: rotate(0deg); }
.theme-toggle .icon-moon { opacity: 0; transform: rotate(-90deg); }


[data-theme="dark"] .theme-toggle .icon-sun  { opacity: 0; transform: rotate(90deg); }
[data-theme="dark"] .theme-toggle .icon-moon { opacity: 1; transform: rotate(0deg); }


[data-theme="dark"] .hero::before {
  opacity: 0.06;
  filter: grayscale(20%) invert(85%) brightness(1.2);
}




[data-theme="dark"] .hero__photo {
  border-color: #2A2420;
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}


[data-theme="dark"] .nav__links a {
  color: var(--color-text);
}
[data-theme="dark"] .nav__links a:hover {
  color: var(--color-primary);
}
[data-theme="dark"] .nav__brand {
  color: var(--color-text);
}


[data-theme="dark"] .nav__lang button[aria-pressed="true"] {
  background: var(--color-primary);
  color: #121010;
}


[data-theme="dark"] .btn--primary {
  background: var(--color-primary);
  color: #121010;
}
[data-theme="dark"] .btn--primary:hover {
  background: var(--color-primary-hover);
}
[data-theme="dark"] .btn--secondary {
  border-color: var(--color-border);
  color: var(--color-text);
}
[data-theme="dark"] .btn--secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}


[data-theme="dark"] .project-expand {
  background: var(--color-surface);
  border-color: var(--color-border);
}
[data-theme="dark"] .project-expand[open] {
  border-color: var(--color-primary);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}
[data-theme="dark"] .project-expand__head h3 {
  color: var(--color-primary);
}


[data-theme="dark"] .chip {
  background: #1C1917;
  border-color: var(--color-border);
  color: var(--color-primary);
}


[data-theme="dark"] .timeline__title {
  color: var(--color-primary);
}


[data-theme="dark"] .cv-entry__title {
  color: var(--color-primary);
}
[data-theme="dark"] .cv-entry__org {
  color: var(--color-muted);
}


[data-theme="dark"] h1,
[data-theme="dark"] h2 {
  color: var(--color-text);
}


[data-theme="dark"] .footer {
  border-top-color: var(--color-border);
}


@media (max-width: 720px) {
  [data-theme="dark"] .nav__links {
    background: var(--color-surface);
    border-bottom-color: var(--color-border);
  }
}