/* Header / Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  backdrop-filter: blur(14px);
  background: rgba(18, 16, 20, 0.78);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  font-size: var(--fs-md);
  letter-spacing: -0.03em;
}

.brand span {
  color: var(--color-accent-soft);
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.nav__link {
  display: inline-flex;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  transition:
    color var(--duration-fast),
    background var(--duration-fast);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--color-text);
  background: rgba(124, 77, 255, 0.12);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.15rem;
  margin-left: 0.25rem;
  padding: 0.2rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-bg-elevated);
}

.lang-switch__btn {
  min-width: 2.25rem;
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-text-subtle);
  transition:
    background var(--duration-fast),
    color var(--duration-fast);
}

.lang-switch__btn.is-active {
  background: var(--color-accent);
  color: #fff;
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.3rem;
}

.nav-toggle span {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--duration), opacity var(--duration);
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  transition:
    transform var(--duration-fast) var(--ease-out),
    background var(--duration-fast),
    border-color var(--duration-fast),
    box-shadow var(--duration-fast);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-deep) 100%);
  color: #fff;
  box-shadow: 0 10px 28px var(--color-accent-glow);
}

.btn--primary:hover {
  box-shadow: 0 14px 36px var(--color-accent-glow);
}

.btn--ghost {
  border: 1px solid var(--color-border-strong);
  background: rgba(42, 34, 52, 0.55);
  color: var(--color-text);
}

.btn--ghost:hover {
  border-color: var(--color-accent-soft);
  background: rgba(124, 77, 255, 0.12);
}

.btn__icon {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

.btn--primary .btn__icon {
  filter: brightness(0) invert(1);
}

/* Social links */
.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.85rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: rgba(26, 22, 32, 0.7);
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  transition:
    color var(--duration-fast),
    border-color var(--duration-fast),
    background var(--duration-fast),
    transform var(--duration-fast) var(--ease-out);
}

.social-link:hover {
  color: var(--color-text);
  border-color: var(--color-accent-soft);
  background: rgba(124, 77, 255, 0.12);
  transform: translateY(-2px);
}

.social-link img {
  width: 1.05rem;
  height: 1.05rem;
}

/* Tags */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.28rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--color-warm);
  background: rgba(124, 77, 255, 0.12);
  border: 1px solid rgba(167, 139, 250, 0.22);
}

/* Timeline entries */
.timeline {
  display: grid;
  gap: 1.25rem;
}

.timeline-item {
  position: relative;
  padding: 1.4rem 1.4rem 1.4rem 1.6rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(34, 28, 42, 0.92), rgba(26, 22, 32, 0.75));
  border: 1px solid var(--color-border);
  transition:
    border-color var(--duration),
    box-shadow var(--duration);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.2rem;
  bottom: 1.2rem;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--color-accent-soft), var(--color-accent-deep));
}

.timeline-item:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-accent);
}

.timeline-item__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-bottom: 0.55rem;
  font-size: var(--fs-sm);
  color: var(--color-text-subtle);
}

.timeline-item__title {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  margin-bottom: 0.2rem;
}

.timeline-item__subtitle {
  color: var(--color-accent-soft);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  margin-bottom: 0.85rem;
}

.timeline-item__desc {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  white-space: pre-line;
}

.timeline-item__missions {
  display: grid;
  gap: 0.4rem;
  margin-bottom: 1rem;
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
}

.timeline-item__missions li {
  position: relative;
  padding-left: 1rem;
}

.timeline-item__missions li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.35rem;
  height: 0.35rem;
  border-radius: 50%;
  background: var(--color-accent-soft);
}

/* Skills — vertical stack, aligned with timeline items */
.skills-stack {
  display: grid;
  gap: 1.25rem;
}

.skills-item .timeline-item__title {
  margin-bottom: 1rem;
}

.skills-item__meta {
  margin: 0 0 0.35rem;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-accent-soft);
}

.skills-item--domains::before {
  background: linear-gradient(180deg, #c4b5fd, var(--color-accent-deep));
}

.skills-item--hard::before {
  background: linear-gradient(180deg, var(--color-accent), #3b0764);
}

.skills-item--soft::before {
  background: linear-gradient(180deg, #e8d5c4, #8a6a4a);
}

.skills-item--soft .skills-item__meta {
  color: #d4b896;
}

.tags--soft .tag {
  color: var(--color-warm);
  background: rgba(232, 213, 196, 0.1);
  border-color: rgba(232, 213, 196, 0.22);
}

/* Certifications */
.cert-list {
  display: grid;
  gap: 0.85rem;
}

@media (min-width: 700px) {
  .cert-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

.cert-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1.1rem 1.2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: rgba(26, 22, 32, 0.75);
}

.cert-item__title {
  font-weight: var(--fw-semibold);
}

.cert-item__meta {
  font-size: var(--fs-sm);
  color: var(--color-text-subtle);
}

/* Project cards */
.project-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 700px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .project-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.project-card {
  display: flex;
  flex-direction: column;
  text-align: left;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  transition:
    transform var(--duration) var(--ease-out),
    border-color var(--duration),
    box-shadow var(--duration);
  height: 100%;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-soft);
}

.project-card__media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-bg-soft);
}

.project-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}

.project-card:hover .project-card__media img {
  transform: scale(1.04);
}

.project-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.15rem 1.2rem 1.35rem;
  flex: 1;
}

.project-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
}

.project-card__desc {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  flex: 1;
}

.project-card__cta {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent-soft);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: var(--gutter);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--duration) var(--ease-out),
    visibility var(--duration);
}

.modal.is-open {
  opacity: 1;
  visibility: visible;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 6, 10, 0.72);
  backdrop-filter: blur(6px);
}

.modal__dialog {
  position: relative;
  z-index: 1;
  width: min(100%, 820px);
  max-height: min(90vh, 900px);
  overflow: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-strong);
  background: linear-gradient(180deg, #221c2c 0%, #161218 100%);
  box-shadow: var(--shadow-soft);
  transform: translateY(1rem) scale(0.98);
  transition: transform var(--duration) var(--ease-out);
}

.modal.is-open .modal__dialog {
  transform: none;
}

.modal__close {
  position: sticky;
  top: 0.75rem;
  float: right;
  margin: 0.75rem 0.75rem 0 0;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: rgba(18, 16, 20, 0.85);
  color: var(--color-text);
  font-size: 1.25rem;
  line-height: 1;
  z-index: 2;
}

.modal__content {
  padding: 1.5rem 1.5rem 2rem;
  clear: both;
}

.modal__title {
  font-size: var(--fs-xl);
  margin-bottom: 0.75rem;
}

.modal__desc {
  color: var(--color-text-muted);
  margin: 1rem 0;
  white-space: pre-line;
}

.modal__sections {
  display: grid;
  gap: 1.25rem;
  margin: 1.25rem 0;
}

.modal__section-title {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  margin-bottom: 0.45rem;
}

.modal__section-text {
  color: var(--color-text-muted);
  white-space: pre-line;
  font-size: var(--fs-sm);
}

.modal__gallery {
  display: grid;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

@media (min-width: 640px) {
  .modal__gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

.modal__gallery img,
.modal__gallery video {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}

.modal__link {
  display: inline-flex;
  margin-top: 0.5rem;
  color: var(--color-accent-soft);
  font-weight: var(--fw-medium);
  font-size: var(--fs-sm);
}

.modal__link:hover {
  text-decoration: underline;
}

body.modal-open {
  overflow: hidden;
}

/* Footer */
.site-footer {
  padding: 2rem 0 2.75rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-subtle);
  font-size: var(--fs-sm);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
}

/* Mobile nav */
@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    position: fixed;
    inset: var(--header-height) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    padding: 1rem var(--gutter) 1.25rem;
    background: rgba(18, 16, 20, 0.96);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition:
      transform var(--duration) var(--ease-out),
      opacity var(--duration),
      visibility var(--duration);
  }

  .nav.is-open {
    transform: none;
    opacity: 1;
    visibility: visible;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
  }

  .nav__link {
    padding: 0.75rem 0.85rem;
  }

  .lang-switch {
    margin-left: 0;
    align-self: flex-start;
  }
}