:root {
  --bg: #07110f;
  --bg-strong: #030706;
  --surface: #0d1a17;
  --surface-raised: #11231f;
  --surface-soft: #13211f;
  --line: #24443d;
  --line-strong: #37c6a4;
  --text: #eef7f3;
  --text-soft: #b8ccc4;
  --text-muted: #7f9990;
  --accent: #38d6ae;
  --accent-strong: #4ce1ff;
  --accent-dark: #0d5c50;
  --blue: #78a8ff;
  --warning: #e5c35c;
  --danger: #ff6b7a;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
  --font-ui:
    "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --sidebar-width: 292px;
  --container: 1120px;
  --section-padding: 104px 0;
  --radius: 8px;
  --font-scale: 1;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(rgba(56, 214, 174, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 214, 174, 0.028) 1px, transparent 1px),
    linear-gradient(135deg, var(--bg-strong) 0%, var(--bg) 44%, #0c161f 100%);
  background-size:
    72px 72px,
    72px 72px,
    auto;
  color: var(--text);
  font-family: var(--font-ui);
  font-size: calc(1rem * var(--font-scale));
  line-height: 1.6;
  overflow-x: hidden;
}

.visually-hidden-translate {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.access-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.access-toolbar .flag_link,
.access-button {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  border: 1px solid rgba(184, 204, 196, 0.2);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
}

.access-toolbar .flag_link img {
  width: 22px;
  height: 22px;
  border-radius: 50%;
}

.access-button {
  cursor: pointer;
}

.access-toolbar .flag_link:hover,
.access-button:hover {
  border-color: rgba(56, 214, 174, 0.55);
  color: var(--accent);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(120deg, rgba(56, 214, 174, 0.08), transparent 34%),
    linear-gradient(290deg, rgba(120, 168, 255, 0.08), transparent 38%);
  opacity: 0.9;
  z-index: -1;
}

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

a {
  color: inherit;
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

::selection {
  background: rgba(56, 214, 174, 0.26);
  color: var(--text);
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 2000;
  transform: translateY(-160%);
  background: var(--accent);
  color: #03110e;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-weight: 700;
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid var(--accent-strong);
  outline-offset: 3px;
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-width);
  height: 100vh;
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  background: rgba(5, 12, 11, 0.92);
  border-right: 1px solid rgba(56, 214, 174, 0.18);
  backdrop-filter: blur(18px);
  z-index: 1000;
}

.profile-section {
  display: flex;
  gap: 14px;
  align-items: center;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(184, 204, 196, 0.12);
}

.profile-mark {
  width: 54px;
  height: 54px;
  flex: 0 0 54px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(56, 214, 174, 0.45);
  background: var(--surface);
  text-decoration: none;
}

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

.profile-name,
.profile-title {
  margin: 0;
}

.profile-name {
  font-weight: 800;
  letter-spacing: 0.01em;
}

.profile-title {
  color: var(--text-muted);
  font-size: 0.86rem;
}

.nav-menu {
  padding: 28px 0;
}

.nav-menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.nav-link {
  min-height: 46px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--text-soft);
  text-decoration: none;
  transition:
    background-color 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

.nav-link i {
  width: 20px;
  color: var(--text-muted);
}

.nav-link:hover,
.nav-link.active {
  background: rgba(56, 214, 174, 0.12);
  color: var(--text);
}

.nav-link:hover {
  transform: translateX(2px);
}

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

.social-links {
  margin-top: auto;
  display: flex;
  gap: 10px;
}

.social-link {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(184, 204, 196, 0.14);
  color: var(--text-soft);
  text-decoration: none;
  transition:
    border-color 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

.social-link:hover {
  color: var(--accent);
  border-color: rgba(56, 214, 174, 0.55);
  transform: translateY(-2px);
}

.mobile-toggle {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 1100;
  width: 46px;
  height: 46px;
  display: none;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(56, 214, 174, 0.45);
  border-radius: var(--radius);
  background: rgba(13, 26, 23, 0.92);
  color: var(--text);
}

.main-content,
.site-footer {
  margin-left: var(--sidebar-width);
}

.section {
  padding: var(--section-padding);
  position: relative;
}

.section-contrast {
  background: rgba(3, 7, 6, 0.32);
  border-block: 1px solid rgba(184, 204, 196, 0.08);
}

.section-content {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.section-header {
  max-width: 760px;
  margin-bottom: 42px;
}

.section-kicker,
.availability {
  margin: 0 0 14px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  color: var(--text);
  line-height: 1.05;
  letter-spacing: 0;
}

h1 {
  max-width: 760px;
  font-size: clamp(2.6rem, 4.8vw, 4.35rem);
  font-weight: 800;
  margin-bottom: 22px;
}

h2 {
  font-size: clamp(2rem, 4.3vw, 4rem);
  font-weight: 800;
  margin-bottom: 16px;
}

h3 {
  font-size: clamp(1.18rem, 2vw, 1.55rem);
  font-weight: 750;
  margin-bottom: 12px;
}

h4 {
  font-size: 1.14rem;
  font-weight: 750;
}

p {
  color: var(--text-soft);
}

.hero {
  min-height: 86vh;
  display: flex;
  align-items: flex-start;
  padding-top: 76px;
  padding-bottom: 64px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(330px, 0.78fr);
  gap: 56px;
  align-items: start;
}

.hero-subtitle {
  max-width: 660px;
  color: var(--text);
  font-size: clamp(1.25rem, 2.2vw, 1.8rem);
  font-weight: 650;
  line-height: 1.25;
  margin-bottom: 18px;
}

.hero-description {
  max-width: 690px;
  font-size: 1.05rem;
  margin-bottom: 30px;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.btn-primary,
.btn-secondary,
.project-link {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 750;
  line-height: 1;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease,
    color 180ms ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #03110e;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.045);
  border-color: rgba(184, 204, 196, 0.18);
  color: var(--text);
}

.btn-primary:hover,
.btn-secondary:hover,
.project-link:hover {
  transform: translateY(-2px);
}

.btn-secondary:hover,
.project-link:hover {
  border-color: rgba(56, 214, 174, 0.55);
  color: var(--accent);
}

.hero-system {
  position: relative;
  padding: 18px;
  border: 1px solid rgba(56, 214, 174, 0.22);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(17, 35, 31, 0.92), rgba(9, 18, 16, 0.94)),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 20px,
      rgba(56, 214, 174, 0.04) 21px
    );
  box-shadow: var(--shadow);
}

.system-topline,
.system-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.system-topline {
  margin-bottom: 18px;
}

.system-topline strong {
  color: var(--accent);
}

.system-node {
  padding: 18px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(184, 204, 196, 0.14);
}

.system-node span {
  display: block;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.system-node strong {
  display: block;
  font-size: 1.35rem;
  margin-bottom: 6px;
}

.system-node small {
  color: var(--text-muted);
}

.primary-node {
  border-color: rgba(56, 214, 174, 0.42);
  background: linear-gradient(
    135deg,
    rgba(56, 214, 174, 0.14),
    rgba(120, 168, 255, 0.08)
  );
}

.system-path {
  width: 2px;
  height: 36px;
  margin: 0 auto;
  background: linear-gradient(var(--accent), rgba(56, 214, 174, 0.08));
}

.system-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.system-footer {
  flex-wrap: wrap;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(184, 204, 196, 0.12);
}

.project-grid,
.timeline-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.timeline-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.project-card,
.timeline-card,
.skill-feature,
.skill-list article,
.contact-form {
  border: 1px solid rgba(184, 204, 196, 0.14);
  border-radius: var(--radius);
  background: rgba(17, 35, 31, 0.68);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.16);
}

.skill-label,
.skill-list article span,
.timeline-card span,
.project-status,
.project-type {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 5px 9px;
  border-radius: var(--radius);
  background: rgba(56, 214, 174, 0.1);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
}

.portfolio-stack {
  display: grid;
  gap: 42px;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.blog-card {
  min-height: 280px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(184, 204, 196, 0.14);
  border-radius: var(--radius);
  background: rgba(17, 35, 31, 0.68);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.16);
}

.blog-card h3 {
  margin: 0 0 12px;
}

.blog-card p {
  margin: 0 0 14px;
}

.blog-meta {
  margin-bottom: 10px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.blog-actions {
  margin-top: 22px;
}

.portfolio-group {
  display: grid;
  gap: 18px;
}

.portfolio-group-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
}

.portfolio-group-header h3 {
  margin: 0;
}

.portfolio-group-header p {
  max-width: 560px;
  margin: 0;
  font-size: 0.95rem;
}

.project-card {
  min-height: 360px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 214, 174, 0.44);
  background: rgba(18, 42, 37, 0.78);
}

.project-card-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 18px;
}

.project-type {
  background: rgba(120, 168, 255, 0.1);
  color: var(--blue);
}

.project-card dl {
  display: grid;
  gap: 14px;
  margin: 0 0 18px;
}

.project-card dt {
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.project-card dd {
  margin: 4px 0 0;
  color: var(--text-soft);
  font-size: 0.95rem;
}

.project-impact {
  margin: 16px 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(184, 204, 196, 0.1);
  font-size: 0.92rem;
}

.project-link {
  align-self: flex-start;
  margin-top: auto;
  min-height: 40px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(184, 204, 196, 0.16);
  color: var(--text);
  font-size: 0.9rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-list span {
  min-height: 28px;
  display: inline-flex;
  align-items: center;
  padding: 5px 9px;
  border: 1px solid rgba(184, 204, 196, 0.14);
  border-radius: var(--radius);
  color: var(--text-soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.skill-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.86fr) minmax(0, 1.14fr);
  gap: 18px;
}

.integration-strip {
  margin-top: 18px;
  padding: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  border: 1px solid rgba(184, 204, 196, 0.14);
  border-radius: var(--radius);
  background: rgba(17, 35, 31, 0.48);
}

.integration-strip span {
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: var(--radius);
  background: rgba(56, 214, 174, 0.1);
  color: var(--text-soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.skill-feature {
  padding: 28px;
}

.skill-feature h3 {
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  margin-top: 16px;
}

.skill-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.skill-list article {
  padding: 22px;
}

.skill-list article h3 {
  margin-top: 14px;
}

.timeline-card {
  padding: 24px;
}

.education-heading {
  margin-top: 48px;
}

.timeline-card span {
  margin-bottom: 18px;
  color: var(--warning);
  background: rgba(229, 195, 92, 0.1);
}

.timeline-card .company {
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 10px;
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 0.78fr);
  gap: 48px;
  align-items: start;
}

.contact-actions {
  margin: 28px 0;
}

.contact-list {
  display: grid;
  gap: 14px;
  margin: 0;
}

.contact-list div {
  padding: 16px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(184, 204, 196, 0.1);
}

.contact-list dt {
  color: var(--text-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.contact-list dd {
  margin: 0;
  color: var(--text);
}

.contact-list a {
  color: var(--text);
  text-decoration-color: rgba(56, 214, 174, 0.45);
  text-underline-offset: 4px;
}

.contact-form {
  padding: 24px;
}

.contact-form h3 {
  margin-bottom: 18px;
}

.contact-form label {
  display: grid;
  gap: 8px;
  color: var(--text-soft);
  font-size: 0.92rem;
  font-weight: 650;
  margin-bottom: 14px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  min-height: 46px;
  padding: 11px 12px;
  border: 1px solid rgba(184, 204, 196, 0.18);
  border-radius: var(--radius);
  background: rgba(3, 7, 6, 0.38);
  color: var(--text);
  resize: vertical;
}

.contact-form textarea {
  min-height: 132px;
}

.contact-form button {
  width: 100%;
}

.form-status {
  min-height: 24px;
  margin: 14px 0 0;
  font-size: 0.92rem;
}

.form-status[data-type="success"] {
  color: var(--accent);
}

.form-status[data-type="error"] {
  color: var(--danger);
}

.form-status[data-type="info"] {
  color: var(--blue);
}

.loading-panel,
.empty-state {
  display: grid;
  place-items: center;
  min-height: 180px;
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid rgba(184, 204, 196, 0.14);
  background: rgba(17, 35, 31, 0.6);
  text-align: center;
}

.loading {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 3px solid rgba(184, 204, 196, 0.22);
  border-top-color: var(--accent);
  animation: spin 800ms linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.site-footer {
  width: auto;
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 32px;
  border-top: 1px solid rgba(184, 204, 196, 0.1);
  background: rgba(3, 7, 6, 0.7);
}

.site-footer p {
  margin: 0;
  font-size: 0.92rem;
}

.site-footer a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
}

@media (max-width: 1180px) {
  .hero-grid,
  .skill-layout,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero-system {
    max-width: 680px;
  }
}

@media (max-width: 980px) {
  :root {
    --section-padding: 82px 0;
  }

  .mobile-toggle {
    display: inline-flex;
  }

  .sidebar {
    transform: translateX(calc(-100% - 12px));
    visibility: hidden;
    transition:
      transform 220ms ease,
      visibility 220ms;
  }

  .sidebar.mobile-show {
    transform: translateX(0);
    visibility: visible;
  }

  .main-content,
  .site-footer {
    margin-left: 0;
  }

  .hero {
    padding-top: 96px;
  }

  .blog-grid,
  .project-grid,
  .timeline-grid {
    grid-template-columns: 1fr;
  }

  .portfolio-group-header {
    display: grid;
  }
}

@media (max-width: 700px) {
  .section-content {
    width: min(100% - 32px, var(--container));
  }

  .hero {
    min-height: auto;
    padding-bottom: 36px;
  }

  .hero-system {
    display: none;
  }

  .system-row,
  .skill-list,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions,
  .contact-actions {
    align-items: stretch;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }

  .site-footer {
    display: grid;
    padding: 22px 16px;
  }
}

@media (max-width: 420px) {
  .sidebar {
    width: min(292px, calc(100vw - 24px));
  }

  h1 {
    font-size: 2.7rem;
  }

  h2 {
    font-size: 2rem;
  }

  .project-card-top {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}