:root {
  --bg: #ffffff;
  --text: #0b0f14;
  --muted: #69727d;
  --line: #e4e7eb;
  --soft: #f4f5f6;
  --soft-2: #edf0f3;
  --accent: #244c69;
  --lime: #dfe978;
  --coral: #f1775f;
  --max: 1560px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, Arial, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

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

button {
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font: inherit;
  padding: 0;
}

h1,
h2,
h3,
h4,
p,
dl,
dd {
  margin: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 24px;
  align-items: center;
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 16px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
}

.header-spacer {
  min-width: 1px;
}

.header-nav,
.contact-list,
.case-header dl,
.experience-row {
  display: grid;
}

.header-nav {
  grid-auto-flow: column;
  gap: 14px;
  color: var(--text);
  font-size: 18px;
  font-weight: 500;
}

.header-nav a,
.header-nav button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: #f4f4f4;
  padding: 13px 28px;
  transition:
    background 220ms ease,
    color 220ms ease,
    transform 220ms ease;
}

.header-nav a:hover,
.header-nav button:hover {
  background: var(--text);
  color: #ffffff;
  transform: translateY(-1px);
}

.theme-toggle {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 50%;
  background: #f4f4f4;
  transition:
    background 220ms ease,
    color 220ms ease,
    transform 220ms ease;
}

.theme-toggle:hover {
  background: var(--text);
  color: #ffffff;
  transform: translateY(-1px);
}

.sun-icon,
.moon-icon {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.moon-icon {
  display: none;
}

body.is-dark {
  --bg: #11161d;
  --text: #f5f6f7;
  --muted: #b3bbc4;
  --line: #343b45;
  --soft: #1d242d;
  --soft-2: #26303b;
}

body.is-dark .site-header {
  background: rgba(17, 22, 29, 0.94);
}

body.is-dark .header-nav a,
body.is-dark .header-nav button,
body.is-dark .theme-toggle,
body.is-dark .download-link,
body.is-dark .tabs {
  background: #202832;
}

body.is-dark .header-nav a:hover,
body.is-dark .header-nav button:hover,
body.is-dark .theme-toggle:hover,
body.is-dark .download-link:hover {
  background: #f5f6f7;
  color: #0b0f14;
}

body.is-dark .tabs::before,
body.is-dark .tab.is-active {
  background: #f5f6f7;
}

body.is-dark .tab.is-active {
  color: #0b0f14;
}

body.is-dark .project-image,
body.is-dark .cv-photo,
body.is-dark .about-image {
  border-color: var(--line);
}

body.is-dark .sun-icon {
  display: none;
}

body.is-dark .moon-icon {
  display: block;
}

.contact-list a:hover,
.contact-list button:hover {
  color: var(--text);
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.about {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 52px;
  align-items: start;
  padding: 120px 0;
  border-bottom: 1px solid var(--line);
}

.about-image {
  display: grid;
  height: 376px;
  min-height: 0;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background:
    url("assets/daniil-voynov.jpg") center / contain no-repeat,
    var(--soft);
}

.about-content {
  display: grid;
  gap: 34px;
}

.intro {
  max-width: 900px;
  font-size: 24px;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.12;
}

.contact-list {
  grid-template-columns: repeat(2, minmax(180px, 1fr));
  gap: 16px 36px;
}

.contact-list div {
  display: grid;
  gap: 5px;
}

.contact-list span {
  color: var(--muted);
  font-size: 16px;
}

.contact-list a,
.contact-list button {
  justify-self: start;
  border-bottom: 0;
  font-size: 18px;
  font-weight: 500;
}

.projects,
.case-studies,
.experience {
  padding: 120px 0;
}

h2 {
  font-size: clamp(44px, 6vw, 72px);
  letter-spacing: 0;
  line-height: 0.98;
}

.section-title {
  display: grid;
  gap: 18px;
  margin-bottom: 56px;
}

.section-title h2 {
  font-size: 32px;
  line-height: 1.1;
}

.tabs {
  position: relative;
  display: flex;
  width: 100%;
  gap: 6px;
  border: 0;
  border-radius: 999px;
  background: #f4f4f4;
  padding: 6px;
}

.tabs::before {
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 6px;
  width: calc((100% - 18px) / 2);
  border-radius: 999px;
  background: var(--text);
  content: "";
  transition: transform 460ms cubic-bezier(0.22, 1, 0.36, 1);
}

.tabs[data-active="study"]::before {
  transform: translateX(calc(100% + 6px));
}

.tab {
  position: relative;
  z-index: 1;
  flex: 1;
  min-height: 54px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 740;
  padding: 14px 18px;
  transition:
    background 240ms ease,
    color 240ms ease,
    transform 240ms ease;
}

.tab.is-active {
  color: #ffffff;
}

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

.tab.is-active:hover {
  color: #ffffff;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 64px 42px;
}

.project-card[hidden] {
  display: none;
}

.project-card {
  display: grid;
  gap: 12px;
}

.project-image {
  display: grid;
  min-height: 430px;
  overflow: hidden;
  place-items: center;
  border-radius: 16px;
  background: var(--soft);
  padding: 48px;
}

.placeholder-light {
  background: #f5f5f5;
}

.placeholder-dark {
  background: #252525;
}

.placeholder-gray {
  background: #c9c9c9;
}

.placeholder-photo {
  background:
    radial-gradient(circle at 66% 50%, rgba(255, 255, 255, 0.14), transparent 34%),
    linear-gradient(135deg, #090909, #303030);
}

.screen-mockup {
  width: min(520px, 88%);
  min-height: 250px;
  border-radius: 6px;
  background:
    linear-gradient(#dce3e8 0 0) 22px 24px / 34% 10px no-repeat,
    linear-gradient(#ffffff 0 0) 22px 58px / calc(100% - 44px) 54px no-repeat,
    linear-gradient(#ffffff 0 0) 22px 132px / calc(50% - 30px) 84px no-repeat,
    linear-gradient(#ffffff 0 0) calc(100% - 22px) 132px / calc(50% - 30px) 84px no-repeat,
    #eef1f4;
  box-shadow: 0 22px 60px rgba(11, 15, 20, 0.12);
}

.screen-mockup.dark {
  background:
    linear-gradient(#474747 0 0) 22px 24px / 34% 10px no-repeat,
    linear-gradient(#1c1c1c 0 0) 22px 58px / calc(100% - 44px) 54px no-repeat,
    linear-gradient(#141414 0 0) 22px 132px / calc(50% - 30px) 84px no-repeat,
    linear-gradient(#141414 0 0) calc(100% - 22px) 132px / calc(50% - 30px) 84px no-repeat,
    #101010;
  box-shadow: none;
}

.project-card h3 {
  margin-top: 12px;
  font-size: 22px;
  font-weight: 500;
  line-height: 1.25;
}

.project-card p {
  width: fit-content;
  border-radius: 999px;
  background: #f4f4f4;
  color: #8f969e;
  font-size: 18px;
  padding: 8px 14px;
}

body.is-dark .project-card p {
  background: #202832;
}

.case-studies {
  display: grid;
  gap: 70px;
}

.case {
  display: grid;
  gap: 28px;
  border-top: 1px solid var(--line);
  padding-top: 34px;
}

.case[hidden] {
  display: none;
}

.case-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 430px;
  gap: 48px;
}

.case-header h3 {
  max-width: 680px;
  font-size: clamp(42px, 6vw, 76px);
  letter-spacing: 0;
  line-height: 0.98;
}

.case-header p {
  margin-top: 12px;
  color: var(--muted);
  font-size: 22px;
}

.case-header dl {
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  align-self: end;
}

.case-header dl div {
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.case-header dt {
  color: var(--muted);
  font-size: 13px;
}

.case-header dd {
  margin-top: 4px;
  font-weight: 650;
}

.case-description {
  max-width: 760px;
  color: var(--muted);
  font-size: 20px;
}

.explore-link {
  width: fit-content;
  border-bottom: 1px solid currentColor;
  font-size: 18px;
  font-weight: 760;
}

.case-media {
  display: grid;
  min-height: 610px;
  overflow: hidden;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
  padding: 46px;
}

.desktop-ui {
  width: min(760px, 100%);
  min-height: 420px;
  border: 10px solid var(--text);
  border-radius: 26px;
  background:
    linear-gradient(var(--text) 0 0) 36px 38px / 90px 12px no-repeat,
    linear-gradient(#d8dfe7 0 0) 36px 86px / 140px 11px no-repeat,
    linear-gradient(#d8dfe7 0 0) 36px 126px / 110px 11px no-repeat,
    linear-gradient(#eef1f4 0 0) 220px 34px / calc(100% - 260px) 56px no-repeat,
    linear-gradient(135deg, transparent 0 30%, rgba(36, 76, 105, 0.2) 30% 100%) 220px 118px / calc(100% - 260px) 210px no-repeat,
    linear-gradient(#e4e9ee 0 0) 220px 360px / 28% 52px no-repeat,
    linear-gradient(#e4e9ee 0 0) 54% 360px / 24% 52px no-repeat,
    linear-gradient(#e4e9ee 0 0) calc(100% - 36px) 360px / 20% 52px no-repeat,
    #ffffff;
  box-shadow: 0 28px 72px rgba(11, 15, 20, 0.16);
}

.phone-media,
.study-media {
  grid-template-columns: repeat(3, minmax(120px, 210px));
  gap: clamp(18px, 4vw, 42px);
}

.phone-ui {
  width: 100%;
  min-height: 420px;
  border: 10px solid var(--text);
  border-radius: 42px;
  background:
    linear-gradient(#cbd4dd 0 0) 22px 32px / 46px 10px no-repeat,
    linear-gradient(var(--lime) 0 0) center 90px / 60% 100px no-repeat,
    linear-gradient(#e7ebef 0 0) center 226px / 72% 44px no-repeat,
    linear-gradient(#e7ebef 0 0) center 292px / 72% 44px no-repeat,
    linear-gradient(var(--accent) 0 0) center bottom 24px / 72% 56px no-repeat,
    #ffffff;
  box-shadow: 0 24px 64px rgba(11, 15, 20, 0.14);
}

.phone-ui.center {
  transform: translateY(-26px);
}

.note-ui {
  width: 100%;
  min-height: 310px;
  border-radius: 8px;
  background:
    linear-gradient(#f1bba5 0 0) 24px 24px / calc(100% - 48px) 110px no-repeat,
    linear-gradient(#d8dfe6 0 0) 24px 172px / 72% 12px no-repeat,
    linear-gradient(#d8dfe6 0 0) 24px 210px / 82% 12px no-repeat,
    linear-gradient(#d8dfe6 0 0) 24px 248px / 58% 12px no-repeat,
    #ffffff;
}

.note-ui.small {
  align-self: end;
  min-height: 250px;
}

.ai-media {
  grid-template-columns: minmax(300px, 1fr) minmax(200px, 0.7fr);
  gap: 30px;
}

.ai-ui,
.result-ui {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 24px 64px rgba(11, 15, 20, 0.14);
}

.ai-ui {
  min-height: 420px;
  background:
    linear-gradient(#303743 0 0) 28px 28px / calc(100% - 56px) 48px no-repeat,
    radial-gradient(circle at 50% 48%, #f7cdbd 0 22%, transparent 23%),
    linear-gradient(#303743 0 0) 28px bottom 28px / 20% 48px no-repeat,
    linear-gradient(#303743 0 0) 50% bottom 28px / 20% 48px no-repeat,
    linear-gradient(#303743 0 0) calc(100% - 28px) bottom 28px / 20% 48px no-repeat,
    #151a22;
}

.result-ui {
  min-height: 340px;
  background:
    linear-gradient(#dfe5eb 0 0) center 42px / 70% 14px no-repeat,
    linear-gradient(#e9edf1 0 0) center 88px / 82% 11px no-repeat,
    linear-gradient(#e9edf1 0 0) center 122px / 62% 11px no-repeat,
    #ffffff;
}

.case-detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(260px, 1fr);
  gap: 28px;
  align-items: stretch;
}

.case-detail-grid > div:first-child,
.mini-media {
  border: 1px solid var(--line);
  border-radius: 8px;
}

.case-detail-grid > div:first-child {
  display: grid;
  align-content: end;
  gap: 14px;
  min-height: 260px;
  padding: 26px;
}

.case-detail-grid h4 {
  font-size: 28px;
  line-height: 1.1;
}

.case-detail-grid p {
  color: var(--muted);
}

.mini-media {
  min-height: 260px;
  background:
    linear-gradient(#dfe5eb 0 0) 28px 32px / 46% 12px no-repeat,
    linear-gradient(#eef1f4 0 0) 28px 72px / calc(100% - 56px) 112px no-repeat,
    var(--soft);
}

.mini-media.warm {
  background:
    linear-gradient(#f1bba5 0 0) 28px 32px / 46% 12px no-repeat,
    linear-gradient(#fff4ef 0 0) 28px 72px / calc(100% - 56px) 112px no-repeat,
    var(--soft);
}

.mini-media.cool {
  background:
    linear-gradient(var(--accent) 0 0) 28px 32px / 46% 12px no-repeat,
    linear-gradient(#edf3f7 0 0) 28px 72px / calc(100% - 56px) 112px no-repeat,
    var(--soft);
}

.mini-media.dark {
  background:
    linear-gradient(#303743 0 0) 28px 32px / 46% 12px no-repeat,
    linear-gradient(#151a22 0 0) 28px 72px / calc(100% - 56px) 112px no-repeat,
    var(--soft);
}

.experience {
  border-bottom: 0;
}

.experience h2 {
  margin-bottom: 34px;
}

.experience-table {
  display: grid;
  border-top: 1px solid var(--line);
}

.experience-row {
  grid-template-columns: 1.05fr 1fr 1fr 0.72fr;
  gap: 20px;
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}

.experience-head {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.experience-row:not(.experience-head) {
  font-size: 17px;
  font-weight: 450;
}

.cv-page {
  padding-bottom: 72px;
}

.cv-hero {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 54px;
  align-items: start;
  padding: 96px 0 78px;
  border-bottom: 1px solid var(--line);
}

.download-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  border-radius: 999px;
  background: #f4f4f4;
  color: var(--text);
  font-size: 18px;
  font-weight: 500;
  padding: 13px 28px;
  transition:
    background 220ms ease,
    color 220ms ease,
  transform 220ms ease;
}

.header-nav .download-link {
  background: var(--text);
  color: var(--bg);
}

.download-link:hover {
  background: var(--text);
  color: var(--bg);
  transform: translateY(-1px);
}

.header-nav .download-link:hover {
  background: #2b343d;
}

body.is-dark .header-nav .download-link {
  background: #f5f6f7;
  color: #0b0f14;
}

body.is-dark .header-nav .download-link:hover {
  background: #dfe4ea;
  color: #0b0f14;
}

.download-icon {
  position: relative;
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
}

.download-icon::before {
  position: absolute;
  left: 10px;
  top: 1px;
  width: 2px;
  height: 14px;
  border-radius: 999px;
  background: currentColor;
  content: "";
}

.download-icon::after {
  position: absolute;
  left: 5px;
  top: 9px;
  width: 10px;
  height: 10px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  content: "";
  transform: rotate(45deg);
}

.cv-photo {
  width: min(420px, 100%);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.cv-photo img {
  display: block;
  width: 100%;
  aspect-ratio: 0.8;
  object-fit: cover;
  object-position: center 32%;
}

.cv-section {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 64px;
  padding: 58px 0;
  border-bottom: 1px solid var(--line);
}

.cv-section h1 {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.1;
}

.cv-entry {
  display: grid;
  grid-template-columns: 150px minmax(0, 760px);
  gap: 44px;
  align-items: start;
  grid-column: 2;
}

.cv-skills,
.cv-contacts {
  grid-column: 2;
}

.cv-entry + .cv-entry {
  margin-top: 54px;
}

.cv-years,
.cv-location,
.cv-contacts span {
  color: var(--muted);
}

.cv-years {
  white-space: nowrap;
}

.cv-entry-body {
  min-width: 0;
  max-width: 760px;
}

.cv-entry-body h2 {
  margin-bottom: 8px;
  font-size: 22px;
  font-weight: 600;
  line-height: 1.15;
  max-width: 560px;
}

.cv-entry-body p {
  margin-top: 16px;
  color: var(--text);
  font-size: 16px;
  line-height: 1.55;
}

.cv-entry-body .cv-location {
  margin-top: 0;
}

.cv-skills {
  max-width: 820px;
  font-size: 18px;
  line-height: 1.5;
}

.cv-contacts {
  display: grid;
  max-width: 640px;
  grid-template-columns: repeat(2, minmax(180px, 1fr));
  gap: 20px 42px;
}

.cv-contacts div {
  display: grid;
  gap: 5px;
}

.cv-contacts a,
.cv-contacts button {
  justify-self: start;
  border-bottom: 1px solid currentColor;
  font-weight: 650;
}

.cv-footer {
  padding-top: 28px;
  color: var(--muted);
  font-size: 14px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: none;
  margin: 0;
  background: #f4f4f4;
  padding: 56px max(24px, calc((100vw - var(--max)) / 2 + 24px));
}

.site-footer p {
  font-size: 18px;
  font-weight: 600;
}

.site-footer span {
  color: var(--muted);
  font-size: 14px;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.site-footer a,
.site-footer button {
  border: 0;
  border-radius: 999px;
  background: #ffffff;
  box-shadow: 0 8px 24px rgba(11, 15, 20, 0.06);
  font-size: 18px;
  font-weight: 500;
  padding: 13px 28px;
  transition:
    background 220ms ease,
    color 220ms ease,
    transform 220ms ease;
}

.site-footer a:hover,
.site-footer button:hover {
  background: var(--text);
  color: var(--bg);
  transform: translateY(-1px);
}

body.is-dark .site-footer a,
body.is-dark .site-footer button {
  background: #26303b;
}

body.is-dark .site-footer {
  background: #151a21;
}

body.is-dark .site-footer a:hover,
body.is-dark .site-footer button:hover {
  background: #f5f6f7;
  color: #0b0f14;
}

@media (max-width: 920px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .header-nav {
    grid-column: auto;
    grid-row: auto;
    grid-auto-flow: column;
    grid-template-columns: none;
  }

  .about,
  .case-header,
  .case-detail-grid {
    grid-template-columns: 1fr;
  }

  .about {
    min-height: auto;
  }

  .about-image {
    height: 300px;
  }

  .case-header dl {
    max-width: 520px;
  }

  .cv-hero,
  .cv-section {
    grid-template-columns: 1fr;
  }

  .cv-entry {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 28px;
    grid-column: auto;
  }

  .cv-skills,
  .cv-contacts {
    grid-column: auto;
  }
}

@media (max-width: 640px) {
  .site-header,
  main {
    padding-inline: 18px;
  }

  .site-header {
    gap: 16px;
  }

  .header-nav {
    grid-auto-flow: row;
    grid-template-columns: 1fr;
    gap: 8px;
    width: min(100%, 280px);
  }

  .header-nav a,
  .header-nav button {
    min-height: 44px;
    padding-inline: 18px;
  }

  .about {
    padding-top: 42px;
  }

  .about-image {
    height: 260px;
  }

  .intro {
    font-size: 24px;
  }

  h2 {
    font-size: 42px;
  }

  .contact-list,
  .section-title,
  .case-header dl,
  .experience-row {
    grid-template-columns: 1fr;
  }

  .tabs {
    width: 100%;
  }

  .tab {
    flex: 1;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .project-image {
    min-height: 320px;
    padding: 28px;
  }

  .case-header h3 {
    font-size: 40px;
  }

  .case-media {
    min-height: 360px;
    padding: 24px;
  }

  .phone-media,
  .study-media,
  .ai-media {
    grid-template-columns: minmax(180px, 240px);
  }

  .phone-ui:not(.center),
  .note-ui,
  .result-ui {
    display: none;
  }

  .phone-ui.center {
    transform: none;
  }

  .desktop-ui,
  .ai-ui {
    min-height: 300px;
  }

  .experience-head {
    display: none;
  }

  .experience-row span:nth-child(n + 2) {
    color: var(--muted);
    font-size: 15px;
  }

  .cv-hero {
    padding-top: 54px;
  }

  .cv-entry,
  .cv-contacts {
    grid-template-columns: 1fr;
  }

  .cv-section h1 {
    font-size: 22px;
  }

  .cv-skills {
    font-size: 18px;
  }

  .site-footer {
    display: grid;
    gap: 18px;
    padding: 24px 18px 30px;
  }

  .site-footer nav {
    justify-content: flex-start;
  }
}

@media (max-width: 760px) {
  body {
    overflow-x: hidden;
  }

  .site-header {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    padding: 12px 14px;
  }

  .header-spacer {
    display: none;
  }

  .header-nav {
    display: grid;
    width: 100%;
    grid-auto-flow: column;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 8px;
  }

  .header-nav a,
  .header-nav button {
    min-width: 0;
    padding: 10px 16px;
    font-size: 14px;
    white-space: nowrap;
  }

  .header-nav button {
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .theme-toggle {
    width: 42px;
    height: 42px;
  }

  .sun-icon,
  .moon-icon {
    width: 18px;
    height: 18px;
  }

  main {
    padding: 0 16px 72px;
  }

  .about {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 72px 0;
  }

  .about-image {
    width: min(280px, 100%);
    height: 376px;
    justify-self: start;
  }

  .about-content {
    gap: 28px;
  }

  .intro {
    max-width: 100%;
    font-size: 22px;
    line-height: 1.18;
  }

  .contact-list {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .contact-list span {
    font-size: 14px;
  }

  .contact-list a,
  .contact-list button {
    font-size: 16px;
  }

  .projects {
    padding: 72px 0;
  }

  .section-title {
    gap: 16px;
    margin-bottom: 34px;
  }

  .section-title h2 {
    font-size: 30px;
  }

  .tabs {
    padding: 5px;
  }

  .tabs::before {
    top: 5px;
    bottom: 5px;
    left: 5px;
    width: calc((100% - 16px) / 2);
  }

  .tabs[data-active="study"]::before {
    transform: translateX(calc(100% + 6px));
  }

  .tab {
    min-height: 48px;
    padding: 12px 10px;
    font-size: 14px;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .project-image {
    min-height: 280px;
    border-radius: 12px;
    padding: 24px;
  }

  .screen-mockup {
    width: 92%;
    min-height: 180px;
  }

  .project-card h3 {
    font-size: 20px;
  }

  .project-card p {
    font-size: 15px;
    padding: 7px 12px;
  }

  .cv-page {
    padding-bottom: 96px;
  }

  .cv-hero {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 54px 0;
  }

  .cv-photo {
    width: min(320px, 100%);
  }

  .download-link {
    gap: 10px;
    font-size: 14px;
    padding: 10px 16px;
  }

  .download-icon {
    width: 18px;
    height: 18px;
  }

  .cv-section {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 44px 0;
  }

  .cv-section h1 {
    font-size: 24px;
  }

  .cv-entry {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .cv-entry + .cv-entry {
    margin-top: 38px;
  }

  .cv-entry-body h2 {
    font-size: 20px;
  }

  .cv-skills {
    font-size: 18px;
  }

  .cv-contacts {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 1100px) {
  .cv-section {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .cv-entry {
    grid-template-columns: 140px minmax(0, 1fr);
    grid-column: auto;
  }

  .cv-entry-body {
    max-width: 780px;
  }

  .cv-skills,
  .cv-contacts {
    grid-column: auto;
  }
}

@media (max-width: 700px) {
  .cv-entry {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

@media (max-width: 760px) {
  .cv-section {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .cv-entry {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

@media (max-width: 420px) {
  .header-nav a,
  .header-nav button {
    padding: 9px 12px;
    font-size: 13px;
  }

  .theme-toggle {
    width: 40px;
    height: 40px;
  }

  .about {
    padding-top: 56px;
  }

  .about-image {
    width: 240px;
    height: 322px;
  }

  .intro {
    font-size: 20px;
  }

  .project-image {
    min-height: 240px;
  }

  .screen-mockup {
    min-height: 150px;
  }
}

@media (max-width: 900px) {
  .site-header {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
  }

  .header-spacer {
    display: none;
  }

  .header-nav {
    min-width: 0;
    grid-column: 1;
    grid-row: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-start;
  }

  .theme-toggle {
    grid-column: 2;
    grid-row: 1;
  }

  .header-nav a,
  .header-nav button,
  .download-link {
    max-width: 100%;
    min-width: 0;
    padding: 10px 16px;
    font-size: 14px;
    white-space: nowrap;
  }

  .header-nav button {
    overflow: hidden;
    text-overflow: ellipsis;
  }

  main {
    padding-right: 18px;
    padding-left: 18px;
  }

  .about {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 72px 0;
  }

  .about-image {
    width: min(280px, 100%);
    height: 376px;
  }

  .intro {
    max-width: 100%;
    font-size: 22px;
    line-height: 1.18;
  }

  .contact-list {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .projects {
    padding: 72px 0;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .project-image {
    min-height: 300px;
    padding: 24px;
  }

  .project-card h3 {
    font-size: 20px;
  }

  .project-card p {
    font-size: 15px;
  }

  .cv-hero,
  .cv-section {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .cv-hero {
    padding: 54px 0;
  }

  .cv-entry {
    grid-column: auto;
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .cv-skills,
  .cv-contacts {
    grid-column: auto;
  }

  .cv-photo {
    width: min(320px, 100%);
  }

  .site-footer {
    display: grid;
    gap: 18px;
    padding: 34px 18px;
  }

  .site-footer nav {
    justify-content: flex-start;
  }
}

@media (max-width: 520px) {
  .site-header {
    padding: 12px;
  }

  .header-nav {
    display: grid;
    grid-template-columns: 1fr;
    width: calc(100vw - 76px);
  }

  .header-nav a,
  .header-nav button,
  .download-link {
    justify-content: center;
    width: 100%;
    padding: 10px 14px;
  }

  .theme-toggle {
    width: 42px;
    height: 42px;
  }

  .about {
    padding: 56px 0;
  }

  .about-image {
    width: 240px;
    height: 322px;
  }

  .intro {
    font-size: 20px;
  }

  .section-title h2 {
    font-size: 30px;
  }

  .tab {
    min-height: 48px;
    padding: 12px 8px;
  }

  .project-image {
    min-height: 240px;
    border-radius: 12px;
  }

  .screen-mockup {
    width: 92%;
    min-height: 150px;
  }

  .site-footer a,
  .site-footer button {
    width: 100%;
    justify-content: center;
    text-align: center;
  }
}