/* ===== SITE LAYOUT — two-column ===== */
.site-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  padding: var(--space-8) var(--space-6);
  scrollbar-width: none;
  background: var(--color-bg);
  z-index: 10;
}

.sidebar::-webkit-scrollbar {
  display: none;
}

/* Sidebar photo */
.sidebar__photo {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: var(--space-5);
  flex-shrink: 0;
  transition: opacity var(--duration-fast) var(--ease-standard);
}

a:has(.sidebar__photo):hover .sidebar__photo {
  opacity: 0.8;
}

.sidebar__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Sidebar identity */
.sidebar__name {
  font-family: var(--font-display);
  font-size: 1.125rem;
  color: var(--color-text-primary);
  line-height: 1.2;
  margin-bottom: var(--space-2);
}

.sidebar__role {
  font-size: var(--text-caption-size);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.sidebar__status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-label-size);
  font-weight: 500;
  color: var(--color-success);
  margin-bottom: var(--space-6);
}

.sidebar__status::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-success);
  border-radius: 50%;
  flex-shrink: 0;
}

/* Sidebar meta */
.sidebar__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.sidebar__meta-item {
  font-size: var(--text-caption-size);
  color: var(--color-text-tertiary);
  line-height: 1.4;
}

.sidebar__meta-item strong {
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* Sidebar nav */
.sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.sidebar__nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-body-size);
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: var(--space-2) 0;
  text-decoration: none;
  transition: color var(--duration-fast);
}

.sidebar__nav-link:hover,
.sidebar__nav-link.active {
  color: var(--color-text-primary);
}

.sidebar__nav-link.active {
  color: var(--color-accent);
}

.sidebar__nav-arrow {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
  transition: transform var(--duration-fast), color var(--duration-fast);
}

.sidebar__nav-link:hover .sidebar__nav-arrow {
  transform: translateX(3px);
  color: var(--color-text-primary);
}

/* Sidebar links */
.sidebar__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: auto;
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-caption-size);
  font-weight: 500;
  color: var(--color-text-tertiary);
  text-decoration: none;
  transition: color var(--duration-fast);
  padding: var(--space-1) 0;
}

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

.sidebar__link svg {
  flex-shrink: 0;
  opacity: 0.5;
  transition: opacity var(--duration-fast);
}

.sidebar__link:hover svg {
  opacity: 1;
}

/* Sidebar lang switcher — subtle */
.sidebar__lang {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: var(--space-5);
}

.sidebar__lang-btn {
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--color-text-tertiary);
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 3px;
  transition: color var(--duration-fast);
  line-height: 1;
  opacity: 0.5;
}

.sidebar__lang-btn.active {
  color: var(--color-text-secondary);
  opacity: 1;
}

.sidebar__lang-btn:hover:not(.active) {
  opacity: 0.75;
  color: var(--color-text-tertiary);
}

.sidebar__lang-sep {
  font-size: 0.625rem;
  color: var(--color-border-strong);
  opacity: 0.5;
  line-height: 1;
}

/* Sidebar close button (mobile only) */
.sidebar__close {
  display: none;
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
  width: 36px;
  height: 36px;
  background: var(--color-surface-raised);
  border: none;
  border-radius: 50%;
  color: var(--color-text-secondary);
  font-size: 1rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: background var(--duration-fast), color var(--duration-fast);
}

.sidebar__close:hover {
  background: var(--color-border);
  color: var(--color-text-primary);
}

/* Sidebar version */
.sidebar__version {
  margin-top: var(--space-4);
  font-size: 0.6875rem;
  color: var(--color-text-tertiary);
  letter-spacing: 0.04em;
  opacity: 0.6;
}

/* Main content area */
.main-content {
  min-width: 0;
}

/* Container (inside main-content) */
.container {
  width: 100%;
  max-width: 100%;
  padding-inline: var(--container-pad);
}

/* Mobile: fullscreen overlay */
@media (max-width: 900px) {
  .site-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100dvh;
    border-right: none;
    overflow-y: auto;
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
    transition: opacity var(--duration-slow) var(--ease-standard),
                transform var(--duration-slow) var(--ease-standard);
    z-index: 200;
    /* layout: column, centered horizontally, start from top */
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 72px var(--space-6) var(--space-8);
    gap: 0;
  }

  .sidebar.open {
    opacity: 1;
    pointer-events: all;
    transform: translateY(0);
  }

  /* Close btn — absolute inside fixed sidebar */
  .sidebar__close {
    display: flex;
    position: absolute;
    top: 14px;
    right: 14px;
    z-index: 1;
  }

  /* Photo */
  .sidebar__photo {
    width: 52px;
    height: 52px;
    margin-bottom: var(--space-3);
    margin-inline: auto;
    flex-shrink: 0;
  }

  /* Name */
  .sidebar__name {
    font-size: 1rem;
    margin-bottom: 2px;
  }

  /* Role */
  .sidebar__role {
    font-size: 0.8125rem;
    margin-bottom: var(--space-1);
  }

  /* Status */
  .sidebar__status {
    margin-bottom: var(--space-6);
    font-size: 0.75rem;
    flex-shrink: 0;
  }

  /* Meta hidden */
  .sidebar__meta {
    display: none;
  }

  /* Nav — dividers, big links */
  .sidebar__nav {
    width: 100%;
    max-width: 320px;
    border-top: 1px solid var(--color-border);
    padding-top: 0;
    margin-bottom: var(--space-5);
    gap: 0;
    flex-shrink: 0;
  }

  .sidebar__nav-link {
    font-size: 1.125rem;
    font-weight: 600;
    padding: 14px 0;
    justify-content: center;
    border-bottom: 1px solid var(--color-border);
  }

  .sidebar__nav-arrow {
    display: none;
  }

  /* Links row */
  .sidebar__links {
    flex-direction: row;
    justify-content: center;
    gap: var(--space-6);
    margin-top: 0;
    margin-bottom: var(--space-4);
    flex-shrink: 0;
  }

  .sidebar__link {
    font-size: 0.875rem;
  }

  /* Lang centered */
  .sidebar__lang {
    margin-top: 0;
    margin-inline: auto;
    flex-shrink: 0;
  }

  /* Version */
  .sidebar__version {
    margin-top: var(--space-3);
    flex-shrink: 0;
  }

  .sidebar-overlay {
    display: none;
  }
}

/* Section */
section {
  padding-block: var(--section-pad);
}

/* Section header */
.section-header {
  margin-bottom: var(--space-10);
}

.section-number {
  display: block;
  font-size: var(--text-label-size);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}

/* Divider */
.divider {
  height: 1px;
  background: var(--color-border);
  border: none;
}

/* Nav spacer */
.nav-spacer {
  height: 64px;
}

/* Hero layout */
.hero {
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  padding-block: var(--space-20);
}

.hero__inner {
  max-width: 860px;
}

.hero__headline {
  margin-bottom: var(--space-6);
}

.hero__sub {
  font-size: 1.1875rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin-bottom: var(--space-8);
}

/* About layout */
.about {
  background: var(--color-surface);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: start;
}

.about__bio p {
  margin-bottom: var(--space-5);
}

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

.about__how h4 {
  margin-bottom: var(--space-6);
}

.how-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.how-item__title {
  font-weight: 600;
  color: var(--color-text-primary);
  font-size: var(--text-body-size);
  display: block;
  margin-bottom: var(--space-1);
}

.how-item__text {
  font-size: var(--text-caption-size);
  line-height: 1.55;
  color: var(--color-text-secondary);
}

/* Work items list */
.works__list {
  display: flex;
  flex-direction: column;
}

.work-item {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-10);
}

.work-item:last-child {
  border-bottom: 1px solid var(--color-border);
}

.work-item__cover-link {
  display: block;
  overflow: hidden;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-8);
}

.work-item__cover {
  width: 100%;
  aspect-ratio: 16 / 6;
  overflow: hidden;
  background: var(--color-surface-raised);
}

.work-item__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 500ms var(--ease-standard);
}

.work-item:hover .work-item__cover img {
  transform: scale(1.02);
}

.work-item__body {
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: var(--space-8);
  align-items: start;
}

.work-item__left {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.work-item__num {
  font-size: var(--text-label-size);
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  font-family: var(--font-ui);
}

.work-item__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.work-item__company {
  font-size: var(--text-caption-size);
  font-weight: 600;
  color: var(--color-text-primary);
  font-family: var(--font-ui);
}

.work-item__period {
  font-size: var(--text-caption-size);
  color: var(--color-text-tertiary);
}

.work-item__title {
  font-size: var(--text-h3-size);
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-weight: 600;
  color: var(--color-text-primary);
}

.work-item__title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast);
}

.work-item__title a:hover {
  color: var(--color-accent);
}

.work-item__desc {
  font-size: var(--text-body-size);
  line-height: 1.6;
  color: var(--color-text-secondary);
  max-width: 600px;
}

.work-item__results {
  font-size: var(--text-caption-size);
  color: var(--color-text-tertiary);
  font-family: var(--font-ui);
  line-height: 1.5;
}

.work-item__right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-6);
  padding-top: var(--space-6);
}

.work-item__stat {
  text-align: right;
}

.work-item__stat-num {
  display: block;
  font-family: var(--font-display);
  font-style: normal;
  font-size: 2.5rem;
  line-height: 1;
  color: var(--color-accent);
  letter-spacing: -0.02em;
}

.work-item__stat-label {
  display: block;
  font-size: var(--text-caption-size);
  color: var(--color-text-tertiary);
  margin-top: var(--space-1);
}

.work-item__cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.work-item__cta:hover {
  color: var(--color-text-primary);
}

.work-item__cta:hover .work-item__arrow {
  transform: translateX(4px);
}

.work-item__arrow {
  display: inline-block;
  transition: transform var(--duration-fast) var(--ease-standard);
}

/* Responsive */
@media (max-width: 768px) {
  .work-item__body {
    grid-template-columns: 1fr;
  }

  .work-item__right {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding-top: 0;
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-5);
  }

  .work-item__stat {
    text-align: left;
  }

  .work-item__cover {
    aspect-ratio: 16 / 7;
  }
}

/* Skills layout */
.skills {
  background: var(--color-surface);
}

.skills__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8) var(--space-10);
}

.skill-group__title {
  font-size: var(--text-label-size);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
  display: block;
}

.skill-group__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* Contact layout */
.contact__inner {
  max-width: 600px;
}

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

.contact__sub {
  margin-bottom: var(--space-8);
  font-size: 1.0625rem;
}

.contact__links {
  display: flex;
  gap: var(--space-6);
  align-items: center;
  flex-wrap: wrap;
}

/* Footer */
.footer {
  padding-block: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__copy {
  font-size: var(--text-caption-size);
  color: var(--color-text-tertiary);
}

/* Metric break */
.metric-break {
  text-align: center;
  padding-block: var(--space-16);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.metric-break__label {
  display: block;
  font-size: var(--text-label-size);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}

.metric-break__number {
  font-family: var(--font-display);
  font-style: normal;
  font-size: var(--text-h1-size);
  line-height: 1;
  color: var(--color-text-primary);
  display: block;
  margin-bottom: var(--space-4);
}

.metric-break__sub {
  font-size: var(--text-caption-size);
  color: var(--color-text-tertiary);
}

/* Responsive — tablet */
@media (max-width: 1024px) {
  .about__grid {
    grid-template-columns: 200px 1fr;
    gap: var(--space-6);
  }

  .about__how {
    grid-column: 1 / -1;
  }

  .skills__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6) var(--space-8);
  }
}

/* Responsive — mobile */
@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding-block: var(--space-10);
    padding-top: var(--space-14);
  }

  .hero__sub {
    font-size: 1rem;
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .about__photo-img {
    max-width: 200px;
  }

  .skills__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
  }

  .contact__links {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .footer__inner {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }

  .metric-break__number {
    font-size: 3rem;
  }
}

@media (max-width: 480px) {
  .skills__grid {
    grid-template-columns: 1fr;
  }
}