:root {
  --bg: #0f1115;
  --panel: #151920;
  --card: #1c222c;
  --primary: #7cf3c5;
  --primary-soft: rgba(124, 243, 197, 0.16);
  --text: #e6eef7;
  --muted: #93a0b5;
  --border: #1f2630;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  --radius: 18px;
  --radius-sm: 12px;
  --radius-lg: 28px;
  --gradient: linear-gradient(135deg, #7cf3c5 0%, #68a7ff 50%, #c888ff 100%);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Space Grotesk', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: radial-gradient(circle at 20% 20%, rgba(124, 243, 197, 0.08), transparent 25%),
              radial-gradient(circle at 80% 10%, rgba(200, 136, 255, 0.12), transparent 25%),
              radial-gradient(circle at 40% 80%, rgba(104, 167, 255, 0.1), transparent 30%),
              var(--bg);
  color: var(--text);
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: rgba(15, 17, 21, 0.72);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav__logo {
  font-weight: 700;
  letter-spacing: 0.04em;
}

.nav__links {
  display: flex;
  gap: 18px;
}

.nav__links a {
  font-weight: 500;
  color: var(--muted);
  transition: color 0.2s ease;
}

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

.btn {
  background: var(--gradient);
  border: none;
  color: #0d1015;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.4);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: none;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}

.section {
  margin-top: 96px;
}

.section__heading h2 {
  margin: 6px 0 12px;
}

.section__heading h2:empty,
.section__heading p:empty {
  display: none;
  margin: 0;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  color: var(--primary);
  margin: 0;
}

.muted {
  color: var(--muted);
}

.small {
  font-size: 12px;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  align-items: center;
  margin-top: 32px;
}

.hero__content h1 {
  font-size: clamp(32px, 4vw, 54px);
  margin: 8px 0 12px;
}

.hero__lead {
  color: var(--muted);
  max-width: 540px;
  line-height: 1.6;
}

.hero__cta {
  display: flex;
  gap: 12px;
  margin: 18px 0;
  flex-wrap: wrap;
}

.socials {
  display: flex;
  gap: 12px;
  color: var(--muted);
}

.hero__photo {
  justify-self: end;
}

.photo-frame {
  background: var(--gradient);
  padding: 6px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.photo-frame img {
  border-radius: var(--radius-lg);
  width: min(420px, 100%);
  height: auto;
  display: block;
}

.about__grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-top: 12px;
}

.about__card {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 18px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.timeline {
  position: relative;
}

.timeline__wrapper {
  position: relative;
  padding: 32px 0 16px;
}

.timeline__line {
  position: absolute;
  left: 16px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--primary-soft);
}

.timeline__items {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.timeline__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: center;
  padding: 12px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}

.timeline__item .dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--card);
  border: 4px solid var(--primary);
  box-shadow: 0 0 0 6px var(--primary-soft);
}

.timeline__item:hover {
  border-color: var(--primary-soft);
  background: rgba(255, 255, 255, 0.02);
  transform: translateX(4px);
}

.timeline__item.is-active {
  border-color: var(--primary);
  background: rgba(124, 243, 197, 0.06);
}

.timeline__details {
  margin-top: 24px;
  display: grid;
  gap: 12px;
}

.cv-inline {
  margin-top: 16px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.cv-inline::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 30%, rgba(124, 243, 197, 0.12), transparent 32%),
              radial-gradient(circle at 80% 10%, rgba(104, 167, 255, 0.14), transparent 28%);
  pointer-events: none;
  opacity: 0.9;
}

.cv-inline h3 {
  margin: 4px 0 6px;
}

.cv-inline h3:empty {
  display: none;
}

.cv-inline .muted:empty {
  display: none;
  margin: 0;
}

.cv-inline .eyebrow {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(124, 243, 197, 0.12);
  border: 1px solid rgba(124, 243, 197, 0.22);
  width: max-content;
}

.cv-inline__btn {
  text-decoration: none;
  padding: 12px 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-weight: 700;
}

.cv-inline__actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  align-items: center;
  min-width: 240px;
}

.cv-inline__actions .cv-inline__btn {
  width: auto;
  min-width: 160px;
}

.documents .cv-inline {
  margin: 0 auto 18px;
  max-width: 960px;
  background: linear-gradient(135deg, rgba(124, 243, 197, 0.08), rgba(104, 167, 255, 0.05));
  border: 1px solid rgba(124, 243, 197, 0.24);
  padding: 18px 20px;
  grid-template-columns: 1.4fr 0.9fr;
}

.documents .cv-inline__text {
  display: grid;
  gap: 6px;
}

.documents .cv-inline__btn {
  background: linear-gradient(120deg, #7cf3c5, #68a7ff);
  color: #0d1015;
  border: 1px solid rgba(124, 243, 197, 0.35);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.documents .cv-inline__btn--bundle {
  background: linear-gradient(120deg, rgba(124, 243, 197, 0.16), rgba(104, 167, 255, 0.18));
  color: var(--text);
  border: 1px solid rgba(124, 243, 197, 0.45);
}

.cv-inline__actions {
  display: grid;
  gap: 8px;
  justify-items: end;
  min-width: 220px;
}

.cv-inline__actions .cv-inline__btn {
  width: 100%;
}

@media (max-width: 720px) {
  .cv-inline {
    grid-template-columns: 1fr;
  }

  .cv-inline__actions {
    justify-content: stretch;
    flex-direction: column;
    align-items: stretch;
    min-width: unset;
  }
}

.detail-card {
  display: none;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.detail-card ul {
  margin: 10px 0 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.6;
}

.detail-card.is-visible {
  display: block;
  animation: fadeIn 0.25s ease;
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: start;
}

.contact__form {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.form-status {
  margin-top: 8px;
  font-size: 14px;
  color: var(--muted);
  min-height: 18px;
}

.form-status.is-success {
  color: var(--primary);
}

.form-status.is-error {
  color: #ffb3a0;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

label {
  font-size: 14px;
  color: var(--muted);
}

input,
textarea {
  background: #0f131a;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  color: var(--text);
  font-family: inherit;
}

input:focus,
textarea:focus,
.timeline__item:focus-visible,
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.contact__links {
  display: grid;
  gap: 12px;
}

.contact-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  color: var(--muted);
}

.contact-card .link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  margin: 6px 6px 0 0;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
}

.contact__direct {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.link--inline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
  padding: 8px 10px;
  gap: 6px;
}

.link--inline svg {
  display: block;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.footer {
  margin: 64px auto 32px;
  text-align: center;
  color: var(--muted);
}

.highlight {
  color: var(--primary);
}

.gallery__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
  margin: 20px auto 0;
  max-width: 980px;
}

.gallery__item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
  box-shadow: var(--shadow);
  transform: translateZ(0);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(1) brightness(0.96);
  transition: transform 0.35s ease, filter 0.35s ease;
}

.gallery__item figcaption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: rgba(15, 17, 21, 0.7);
  border: 1px solid var(--border);
  color: var(--text);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.gallery__item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(124, 243, 197, 0.18), transparent 45%),
              radial-gradient(circle at 80% 20%, rgba(200, 136, 255, 0.14), transparent 45%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.gallery__item:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.45);
  border-color: var(--primary-soft);
}

.gallery__item:hover img {
  transform: scale(1.08);
  filter: saturate(1.05) brightness(1);
}

.gallery__item:hover::after {
  opacity: 1;
}

.gallery__item.is-zoomed,
.gallery__item:focus-visible {
  transform: translateY(-6px) scale(1.05);
  border-color: var(--primary-soft);
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.45);
}

.documents .docs__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: 960px;
  margin: 0 auto;
}

.doc-block {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.015));
  border: 1px solid rgba(124, 243, 197, 0.18);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  display: grid;
  gap: 14px;
}

.doc-sections {
  display: grid;
  gap: 18px;
}

.doc-section {
  padding: 10px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: grid;
  gap: 10px;
}

.doc-section__heading h3 {
  margin: 0 0 4px;
}
.doc-section__heading h4 {
  margin: 0 0 4px;
  font-size: 18px;
}

.doc-bundle {
  padding-top: 6px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.doc-bundle__btn {
  width: 100%;
  justify-content: center;
  font-size: 15px;
}

.doc-block__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.doc-block--single .doc-block__header {
  align-items: flex-start;
}

.doc-block__header h3 {
  margin: 0 0 4px;
}

.doc-block__cta {
  white-space: nowrap;
  padding: 10px 16px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.doc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr;
}

.doc-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
}

.doc-row__meta {
  display: grid;
  gap: 4px;
}

.doc-row__title {
  font-weight: 700;
}

.doc-row__subtitle {
  font-size: 13px;
}

.doc-row__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.doc-row__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  background: rgba(124, 243, 197, 0.08);
  border: 1px solid var(--primary-soft);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 14px;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.2s ease;
}

.doc-row__link:hover {
  transform: translateY(-1px);
  border-color: var(--primary);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  background: var(--primary);
  color: #0f1115;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  font-weight: 700;
  font-size: 12px;
}

@media (max-width: 720px) {
  .doc-block__header {
    align-items: flex-start;
    flex-direction: column;
  }

  .doc-block__cta {
    width: 100%;
    justify-content: center;
  }

  .doc-list {
    grid-template-columns: 1fr;
  }
}

.projects .tabs {
  display: inline-flex;
  gap: 6px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px;
  margin: 12px 0 16px;
}

.tab {
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 700;
  transition: background 0.2s ease, color 0.2s ease;
}

.tab.is-active {
  background: var(--primary-soft);
  color: var(--text);
}

.projects__content {
  position: relative;
}

.projects__list {
  display: none;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}

.projects__list.is-active {
  display: grid;
}

.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 8px;
}

.project-card__top h3 {
  margin: 0 0 6px;
}

.project-card__tech {
  color: var(--primary);
  font-weight: 600;
  margin: 0;
}

.project-card__impact {
  margin: 0;
  line-height: 1.5;
}

.project-card__link {
  color: var(--primary);
  font-weight: 700;
}

.roadmap__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  align-items: start;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  padding: 10px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--text);
  border: 1px solid var(--border);
  font-weight: 600;
}

.steps {
  display: grid;
  gap: 12px;
}

.step-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}

.step-card__horizon {
  display: inline-flex;
  padding: 6px 10px;
  background: rgba(124, 243, 197, 0.1);
  color: var(--primary);
  border-radius: var(--radius-sm);
  font-weight: 700;
  margin-bottom: 8px;
}

.gallery__item.is-zoomed img,
.gallery__item:focus-visible img {
  transform: scale(1.12);
}

.gallery {
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
}

.lightbox {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
}

.lightbox.is-open {
  display: flex;
}

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(5, 7, 10, 0.8);
  backdrop-filter: blur(4px);
}

.lightbox__content {
  position: relative;
  z-index: 1;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.65);
  max-width: min(900px, 92vw);
  padding: 16px;
  animation: fadeIn 0.2s ease;
}

.lightbox__img {
  display: block;
  width: 100%;
  max-height: 70vh;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.lightbox__text {
  margin-top: 12px;
  color: var(--muted);
  line-height: 1.6;
}

.lightbox__close {
  position: absolute;
  top: 10px;
  right: 10px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
}

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

.lang-toggle {
  position: fixed;
  top: 14px;
  right: 16px;
  z-index: 60;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 8px 12px;
  border: 1px solid var(--border);
  box-shadow: none;
  background: rgba(15, 17, 21, 0.9);
  backdrop-filter: blur(10px);
}

.toc {
  position: fixed;
  top: 14px;
  left: 16px;
  z-index: 55;
  display: grid;
  gap: 8px;
  background: rgba(15, 17, 21, 0.8);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  backdrop-filter: blur(10px);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.toc__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.toc__title {
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.toc__toggle {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 32px;
  height: 32px;
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
  display: grid;
  place-items: center;
}

.toc__toggle:hover,
.toc__toggle:focus-visible {
  border-color: var(--primary);
  color: var(--primary);
}

.toc__links {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.toc__link {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.toc__link:hover,
.toc__link:focus-visible {
  color: var(--text);
  border-color: var(--primary);
  background: rgba(124, 243, 197, 0.08);
  outline: none;
}

.toc.is-collapsed {
  padding: 10px;
}

.toc.is-collapsed .toc__links {
  display: none;
}

.toc.is-collapsed .toc__toggle {
  transform: rotate(180deg);
}

@media (max-width: 900px) {
  .toc {
    position: fixed;
    top: 12px;
    left: 12px;
    right: auto;
    margin: 0;
    justify-content: flex-start;
    width: auto;
    max-width: min(320px, calc(100% - 24px));
  }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
  .nav {
    flex-wrap: wrap;
    gap: 12px;
  }
  .nav__links {
    width: 100%;
    justify-content: space-between;
  }
  .contact__grid {
    grid-template-columns: 1fr;
  }
  .timeline__line {
    left: 10px;
  }
}