/* ============================================
   Kevin Burger — Minimal, typography-first
   ============================================ */

:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.8125rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.3vw,  0.9375rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.0625rem);
  --text-lg:   clamp(1.0625rem, 1rem   + 0.4vw,  1.25rem);
  --text-xl:   clamp(1.375rem, 1.1rem  + 1.2vw,  2rem);
  --text-2xl:  clamp(1.75rem,  1.3rem  + 2vw,    2.75rem);

  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 720px;
  --content-wide:   1040px;

  --font-display: 'Cabinet Grotesk', 'Inter', sans-serif;
  --font-body:    'Satoshi', 'Inter', sans-serif;
}

/* Light (default) */
:root, [data-theme="light"] {
  --color-bg:          #F7F4EF;
  --color-surface:     #FFFFFF;
  --color-text:        #1A1916;
  --color-text-muted:  #6B6560;
  --color-text-faint:  #A8A39D;
  --color-primary:     #1A1916;
  --color-primary-hover: #4A4642;
  --color-border:      rgba(26, 25, 22, 0.12);
  --color-divider:     rgba(26, 25, 22, 0.08);
  --color-selection:   rgba(26, 25, 22, 0.12);
}

/* Dark */
[data-theme="dark"] {
  --color-bg:          #15130F;
  --color-surface:     #1C1A16;
  --color-text:        #ECE7DE;
  --color-text-muted:  #9A938A;
  --color-text-faint:  #5C544C;
  --color-primary:     #ECE7DE;
  --color-primary-hover: #C4BDB2;
  --color-border:      rgba(236, 231, 222, 0.12);
  --color-divider:     rgba(236, 231, 222, 0.08);
  --color-selection:   rgba(236, 231, 222, 0.18);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:          #15130F;
    --color-surface:     #1C1A16;
    --color-text:        #ECE7DE;
    --color-text-muted:  #9A938A;
    --color-text-faint:  #5C544C;
    --color-primary:     #ECE7DE;
    --color-primary-hover: #C4BDB2;
    --color-border:      rgba(236, 231, 222, 0.12);
    --color-divider:     rgba(236, 231, 222, 0.08);
    --color-selection:   rgba(236, 231, 222, 0.18);
  }
}

/* ============================================
   LAYOUT
   ============================================ */

.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

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

@media (max-width: 640px) {
  .container { padding-inline: var(--space-5); }
}

main {
  display: block;
}

/* ============================================
   HEADER
   ============================================ */

.site-header {
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-bg);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  min-height: 4rem;
  padding-block: var(--space-4);
}

.wordmark {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
  text-decoration: none;
}

.nav-main {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.nav-link:hover {
  color: var(--color-text);
}

.nav-link--active {
  color: var(--color-text);
  font-weight: 700;
}

.nav-sep {
  color: var(--color-text-faint);
  font-size: var(--text-sm);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.lang-option {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.lang-option:hover { color: var(--color-text); }

.lang-option--active {
  color: var(--color-text);
  font-weight: 700;
}

.lang-separator {
  color: var(--color-text-faint);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  padding: 4px;
  transition: color var(--transition);
}

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

@media (max-width: 520px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
  .nav-main {
    justify-content: flex-start;
    width: 100%;
  }
}

/* ============================================
   FOOTER
   ============================================ */

.site-footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-8);
  margin-top: var(--space-20);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-text {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin: 0;
}

.footer-text a {
  color: var(--color-text-muted);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color var(--transition);
}

.footer-text a:hover {
  color: var(--color-text);
}

/* ============================================
   SECTIONS
   ============================================ */

.hero {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32)) var(--space-16);
}

.section {
  border-top: 1px solid var(--color-divider);
  padding-block: clamp(var(--space-12), 8vw, var(--space-20));
}

.section-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  text-transform: uppercase;
  margin: 0 0 var(--space-8);
}

/* ============================================
   HERO / TYPOGRAPHY
   ============================================ */

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--color-text);
  margin: 0 0 var(--space-6);
}

.hero-description {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 56ch;
  margin: 0 0 var(--space-8);
}

.hero-cta {
  margin: 0;
}

.hero-cta a {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 2px;
  transition: color var(--transition), border-color var(--transition);
}

.hero-cta a:hover {
  color: var(--color-primary-hover);
  border-bottom-color: currentColor;
}

/* ============================================
   WORK LIST (two-column rows)
   ============================================ */

.work-list {
  margin: 0;
  display: grid;
  gap: var(--space-6);
}

.work-row {
  display: grid;
  grid-template-columns: minmax(12rem, 14rem) 1fr;
  gap: var(--space-8);
  align-items: baseline;
}

.work-title {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}

.work-description {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
  max-width: 56ch;
}

@media (max-width: 640px) {
  .work-row {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }
}

/* ============================================
   PROJECTS
   ============================================ */

.project-list {
  display: grid;
  gap: var(--space-10);
}

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

.project-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
  letter-spacing: -0.01em;
}

.project-meta {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}

.project-summary {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 64ch;
  margin: var(--space-2) 0 0;
}

/* ============================================
   CLOSING
   ============================================ */

.closing {
  text-align: center;
}

.closing-question {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin: 0 0 var(--space-4);
}

.closing-cta {
  margin: 0;
}

.closing-cta a {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 2px;
  transition: color var(--transition), border-color var(--transition);
}

.closing-cta a:hover {
  color: var(--color-primary-hover);
  border-bottom-color: currentColor;
}

/* ============================================
   ABOUT
   ============================================ */

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: start;
}

@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 220px;
    gap: var(--space-12);
  }
  .about-portrait {
    justify-self: end;
  }
}

.about-portrait {
  margin: 0;
}

.about-portrait img {
  width: 100%;
  max-width: 220px;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center top;
  display: block;
}

@media (max-width: 767px) {
  .about-portrait img {
    max-width: 100%;
    aspect-ratio: 4 / 3;
  }
}

.about-bio {
  max-width: 60ch;
}

/* ============================================
   PROSE (markdown content)
   ============================================ */

.prose {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.7;
}

.prose p {
  margin: 0 0 var(--space-5);
  max-width: 60ch;
}

.prose p:last-child { margin-bottom: 0; }

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

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

/* ============================================
   PLAIN LIST (outside work)
   ============================================ */

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

.plain-list li {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 60ch;
}

/* ============================================
   LANGUAGES LINE
   ============================================ */

.languages-line {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* ============================================
   CONTACT
   ============================================ */

.contact-email {
  margin: 0 0 var(--space-3);
}

.mailto-link {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 2px;
  transition: color var(--transition), border-color var(--transition);
}

.mailto-link:hover {
  color: var(--color-primary-hover);
  border-bottom-color: currentColor;
}

.contact-linkedin {
  margin: var(--space-6) 0 0;
}

.contact-linkedin a {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color var(--transition);
}

.contact-linkedin a:hover {
  color: var(--color-text);
}

/* ============================================
   FADE-IN (subtle, the one permitted animation)
   ============================================ */

.fade-in {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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