/* style.css — dataguru components */

/* ===== LAYOUT ===== */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 4vw, var(--space-8));
}

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow 240ms ease, background 240ms ease, border-color 240ms ease;
}
.site-header.is-scrolled {
  box-shadow: 0 1px 0 0 var(--color-divider), 0 8px 24px -16px rgba(14, 20, 34, 0.16);
  background: color-mix(in oklab, var(--color-bg) 94%, transparent);
}
[data-theme='dark'] .site-header.is-scrolled {
  box-shadow: 0 1px 0 0 var(--color-divider), 0 8px 24px -12px rgba(0, 0, 0, 0.6);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
  font-weight: 600;
  letter-spacing: -0.02em;
  font-size: var(--text-base);
}
.brand svg {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  color: var(--color-primary);
}
.brand-name {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--text-sm);
  letter-spacing: 0;
}
.brand-name .accent {
  color: var(--color-primary);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.nav-links {
  display: none;
  gap: var(--space-1);
  list-style: none;
}
@media (min-width: 720px) {
  .nav-links {
    display: flex;
  }
}
.nav-links a {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  border-radius: var(--radius-md);
  font-weight: 500;
  position: relative;
}
.nav-links a:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: var(--space-3);
  right: var(--space-3);
  bottom: 4px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 240ms cubic-bezier(0.16, 1, 0.3, 1);
}
.nav-links a:hover::after,
.nav-links a[aria-current='page']::after {
  transform: scaleX(1);
}
.nav-links a[aria-current='page'] {
  color: var(--color-primary);
  background: transparent;
}

.controls {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: var(--space-2);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  border: 1px solid transparent;
}
.icon-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
  border-color: var(--color-border);
}

.lang-toggle {
  width: auto;
  padding: 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.lang-toggle .lang-sep {
  margin-inline: 4px;
  color: var(--color-text-faint);
}
.lang-toggle .lang-active {
  color: var(--color-primary);
}

/* ===== HAMBURGER & MOBILE DRAWER ===== */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  border: 1px solid transparent;
  padding: 8px;
}
.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 300ms ease, opacity 300ms ease;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 719px) {
  .hamburger {
    display: flex;
  }
}
.hamburger:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
  border-color: var(--color-border);
}

.mobile-drawer {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  opacity: 0;
  transition: opacity 250ms ease;
}
.mobile-drawer.open {
  pointer-events: auto;
  opacity: 1;
}
.mobile-drawer-backdrop {
  position: absolute;
  inset: 0;
  background: color-mix(in oklab, var(--color-bg) 70%, transparent);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.mobile-drawer-panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(300px, 80vw);
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transform: translateX(100%);
  transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1);
}
.mobile-drawer.open .mobile-drawer-panel {
  transform: translateX(0);
}
.mobile-drawer-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.mobile-drawer-nav a {
  display: block;
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--text-base);
  font-weight: 500;
  border-radius: var(--radius-md);
}
.mobile-drawer-nav a:hover,
.mobile-drawer-nav a[aria-current='page'] {
  background: var(--color-surface-offset);
  color: var(--color-primary);
}
.mobile-drawer-controls {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  line-height: 1;
  position: relative;
  letter-spacing: 0.01em;
  will-change: transform;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow:
    0 1px 0 inset color-mix(in oklab, #fff 30%, transparent),
    0 6px 14px -6px color-mix(in oklab, var(--color-primary) 60%, transparent);
}
[data-theme='dark'] .btn-primary {
  color: #0a0d14;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow:
    0 1px 0 inset color-mix(in oklab, #fff 30%, transparent),
    0 10px 26px -8px color-mix(in oklab, var(--color-primary) 70%, transparent);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow:
    0 1px 0 inset color-mix(in oklab, #fff 15%, transparent),
    0 2px 6px -2px color-mix(in oklab, var(--color-primary) 50%, transparent);
}
.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover {
  background: var(--color-surface-offset);
  border-color: var(--color-text-faint);
}
.btn svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-interactive);
}
.btn:hover svg {
  transform: translateX(2px);
}

/* ===== SCROLL TO TOP ===== */
.scroll-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 90;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 300ms ease, transform 300ms ease, color var(--transition-interactive), background var(--transition-interactive);
}
.scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.scroll-top:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-surface-offset);
}
.scroll-top svg {
  transition: transform var(--transition-interactive);
}
.scroll-top:hover svg {
  transform: translateY(-2px);
}

/* ===== LANG SWITCHING HELPERS ===== */
html[lang='de'] [data-lang-en],
html[lang='en'] [data-lang-de] {
  display: none !important;
}

/* ===== PAGE LOAD FADE-IN ===== */
@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
main {
  display: block;
  animation: fade-in-up 600ms ease both;
}

/* ===== FORCED-DARK SECTIONS (hero, flagships, numbers strip) ===== */
.section-dark {
  background: var(--forced-dark-bg);
  color: var(--forced-dark-text);
}
.section-dark .text-muted {
  color: var(--forced-dark-text-muted);
}
.section-dark .text-faint {
  color: var(--forced-dark-text-faint);
}

/* ===== FOOTER — slim two-column ===== */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-8);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-copy {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer-social {
  display: flex;
  gap: var(--space-3);
}
.footer-social a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--transition-interactive);
}
.footer-social a:hover {
  color: var(--color-primary);
}

/* ===== SCROLL REVEAL — simplified, no stagger ===== */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ===== HERO SPLIT ===== */
.hero-split {
  position: relative;
  overflow: hidden;
  padding-block: var(--space-20) var(--space-16);
  /* Grid-pattern background */
  background-image:
    linear-gradient(rgba(77,139,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(77,139,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
}
.hero-split::after {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60%;
  height: 80%;
  background: radial-gradient(circle, rgba(0,102,255,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-split-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-12);
  align-items: center;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.hero-headline {
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--forced-dark-text);
  margin-bottom: var(--space-6);
}
.hero-headline .accent {
  color: var(--color-primary);
}

.hero-sub {
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--forced-dark-text-muted);
  max-width: 500px;
  margin-bottom: var(--space-8);
}

.hero-ctas {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* Hero artifact container (right side) */
.hero-artifact {
  background: var(--forced-dark-surface);
  border: 1px solid var(--forced-dark-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.hero-artifact img {
  border-radius: var(--radius-lg);
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.hero-artifact-caption {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}
.hero-artifact-caption .label {
  color: var(--color-primary);
  letter-spacing: 0.08em;
}
.hero-artifact-caption .metrics {
  display: flex;
  gap: var(--space-4);
}
.hero-artifact-caption .metric-success {
  color: var(--color-success);
}
.hero-artifact-caption .metric-warning {
  color: var(--color-warning);
}

/* Mobile: stack vertically */
@media (max-width: 959px) {
  .hero-split-inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .hero-split {
    padding-block: var(--space-12) var(--space-10);
  }
}

/* ===== FLAGSHIP TEASERS (index page) ===== */
.teaser-section {
  padding-block: var(--space-16);
}
.teaser-section-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-12);
}

.teaser-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: center;
  margin-bottom: var(--space-16);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}
.teaser-card:nth-child(even) {
  direction: rtl;
}
.teaser-card:nth-child(even) > * {
  direction: ltr;
}

.teaser-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-divider);
}
.teaser-image img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.teaser-card:hover .teaser-image img {
  transform: scale(1.03);
}

.teaser-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.teaser-title {
  font-size: var(--text-lg);
  font-weight: 600;
}
.teaser-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}
.teaser-metric {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-success);
  font-weight: 600;
}
.teaser-link {
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}
.teaser-link:hover {
  text-decoration: underline;
}

@media (max-width: 719px) {
  .teaser-card,
  .teaser-card:nth-child(even) {
    grid-template-columns: 1fr;
    direction: ltr;
    gap: var(--space-6);
  }
}

/* ===== NUMBERS STRIP ===== */
.numbers-strip {
  padding-block: var(--space-12);
}
.numbers-strip-inner {
  display: flex;
  justify-content: center;
  gap: var(--space-12);
  flex-wrap: wrap;
}
.number-item {
  text-align: center;
}
.number-value {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--forced-dark-text);
}
.number-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--forced-dark-text-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: var(--space-1);
}

@media (max-width: 540px) {
  .numbers-strip-inner {
    gap: var(--space-6);
  }
  .number-value {
    font-size: var(--text-lg);
  }
}

/* ===== PROFILE TEASER ===== */
.profile-teaser {
  padding-block: var(--space-16);
  text-align: center;
}
.profile-teaser-text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.8;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
}

/* ===== CASE STUDY (flagship projects) ===== */
.case-study {
  padding-block: var(--space-16);
  border-bottom: 1px solid var(--forced-dark-border);
  position: relative;
}
.case-study:last-of-type {
  border-bottom: none;
}

.case-study-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-8);
}

.case-study-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.case-study-number {
  font-family: var(--font-mono);
  font-size: clamp(3rem, 5vw, 5rem);
  font-weight: 800;
  color: rgba(77, 139, 255, 0.08);
  line-height: 1;
}

.case-study-title {
  font-size: var(--text-xl);
  color: var(--forced-dark-text);
  font-weight: 700;
}

/* Panorama image */
.case-study-image {
  border: 1px solid var(--forced-dark-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--space-8);
}
.case-study-image img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

/* Metrics row */
.case-study-metrics {
  display: flex;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}
.metric-block {
  flex: 1;
  min-width: 120px;
  padding-left: var(--space-3);
  border-left: 2px solid var(--color-primary);
}
.metric-block.success { border-color: var(--color-success); }
.metric-block.warning { border-color: var(--color-warning); }
.metric-block.purple  { border-color: var(--color-purple); }

.metric-value {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 700;
}
.metric-block.success .metric-value { color: var(--color-success); }
.metric-block.warning .metric-value { color: var(--color-warning); }
.metric-block.purple  .metric-value { color: var(--color-purple); }
.metric-block:not(.success):not(.warning):not(.purple) .metric-value {
  color: var(--color-primary);
}

.metric-label {
  font-size: var(--text-xs);
  color: var(--forced-dark-text-faint);
  margin-top: var(--space-1);
}

/* Story text */
.case-study-story {
  font-size: var(--text-base);
  color: var(--forced-dark-text-muted);
  line-height: 1.8;
  max-width: 640px;
  margin-bottom: var(--space-6);
}

/* Tech tags on dark background */
.tech-tags-dark {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.tech-tags-dark .tag {
  border: 1px solid var(--forced-dark-border);
  color: var(--forced-dark-text-muted);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
}

@media (max-width: 540px) {
  .case-study-metrics {
    gap: var(--space-4);
  }
  .case-study-image img {
    aspect-ratio: 16 / 9;
  }
}

/* ===== SOLID PROJECT CARDS ===== */
.solid-projects {
  padding-block: var(--space-16);
}
.solid-projects-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-10);
}

.solid-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.solid-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive);
}
.solid-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.solid-card-image {
  overflow: hidden;
}
.solid-card-image img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.solid-card:hover .solid-card-image img {
  transform: scale(1.03);
}

.solid-card-body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.solid-card-title {
  font-size: var(--text-lg);
  font-weight: 600;
}
.solid-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}
.solid-card-metrics {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-success);
  font-weight: 600;
}

/* Tech tags on light background */
.tech-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.tech-tags .tag {
  background: var(--color-surface-offset);
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
}

@media (max-width: 719px) {
  .solid-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== PAGE HERO BANNER (dark, reusable) ===== */
.page-hero {
  padding-block: var(--space-16) var(--space-12);
}
.page-hero-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}
.page-hero-title {
  font-size: var(--text-2xl);
  color: var(--forced-dark-text);
  font-weight: 700;
  margin-bottom: var(--space-4);
}
.page-hero-sub {
  font-size: var(--text-base);
  color: var(--forced-dark-text-muted);
  max-width: 600px;
  line-height: 1.7;
}

/* ===== ABOUT PAGE ===== */
.about-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-12);
  padding-block: var(--space-12);
}

/* Sidebar */
.about-sidebar {
  position: sticky;
  top: calc(var(--space-16) + var(--space-8));
  align-self: start;
}
.about-photo {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  border: 3px solid var(--color-divider);
  object-fit: cover;
  margin-bottom: var(--space-4);
}
.about-name {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}
.about-role {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}
.about-location {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}
.about-social {
  display: flex;
  gap: var(--space-2);
}
.about-social a {
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  text-decoration: none;
  font-family: var(--font-mono);
}
.about-social a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Content sections */
.about-section {
  margin-bottom: var(--space-12);
}
.about-section-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
}

/* Combined timeline */
.timeline {
  position: relative;
  padding-left: var(--space-8);
}
.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: var(--color-divider);
}
.timeline-item {
  position: relative;
  margin-bottom: var(--space-8);
}
.timeline-item:last-child {
  margin-bottom: 0;
}
.timeline-dot {
  position: absolute;
  left: calc(-1 * var(--space-8) + 3px);
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-divider);
  border: 2px solid var(--color-bg);
}
.timeline-item.current .timeline-dot {
  background: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-highlight);
  animation: pulse-ring 2.4s ease-out infinite;
}
@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(0, 102, 255, 0.4); }
  100% { box-shadow: 0 0 0 10px rgba(0, 102, 255, 0); }
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}
.timeline-title {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-1);
}
.timeline-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Skills grid (4 categories, one occurrence) */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}
.skill-category {
  padding: var(--space-4);
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
}
.skill-category-title {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-3);
}
.skill-category .tech-tags {
  gap: var(--space-1);
}

/* Contact CTA */
.about-cta {
  text-align: center;
  padding: var(--space-10);
  background: var(--color-surface-2);
  border-radius: var(--radius-xl);
}
.about-cta-title {
  font-size: var(--text-lg);
  margin-bottom: var(--space-4);
}
.about-cta-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

/* Mobile about */
@media (max-width: 719px) {
  .about-layout {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .about-sidebar {
    position: static;
    text-align: center;
  }
  .about-photo {
    margin-inline: auto;
  }
  .about-social {
    justify-content: center;
  }
  .skills-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== FOCUS RING CONSISTENCY ===== */
.solid-card:focus-visible,
.teaser-card:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
}

/* ===== PRINT ===== */
@media print {
  .site-header, .site-footer, .scroll-top, .mobile-drawer, .hamburger { display: none !important; }
}