:root {
  --color-bg: #0f172a;
  --color-bg-soft: #111827;
  --color-card: #1e293b;
  --color-card-hover: #273449;
  --color-text: #e5e7eb;
  --color-text-muted: #94a3b8;
  --color-accent: #38bdf8;
  --color-accent-soft: rgba(56, 189, 248, 0.14);
  --color-accent-secondary: #a78bfa;
  --color-border: rgba(148, 163, 184, 0.22);
  --color-success: #22c55e;
  --shadow-soft: 0 24px 70px rgba(2, 6, 23, 0.28);
  --container: 1120px;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.09), transparent 32rem),
    radial-gradient(circle at top right, rgba(167, 139, 250, 0.08), transparent 30rem),
    var(--color-bg);
  color: var(--color-text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.6;
  overflow-x: hidden;
}

button,
input,
textarea,
select {
  font: inherit;
}

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

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

.container {
  width: min(100% - 40px, var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--color-border);
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(16px);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.header-inner {
  min-height: 72px;
}

.brand {
  color: var(--color-text);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1.2;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.site-nav a {
  border-radius: 999px;
  color: var(--color-text-muted);
  font-size: 15px;
  padding: 8px 12px;
  transition: color 180ms ease, background-color 180ms ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  background: var(--color-accent-soft);
  color: var(--color-text);
}

.section {
  padding: 86px 0;
  scroll-margin-top: 92px;
}

.hero {
  min-height: calc(100vh - 72px);
  display: flex;
  align-items: center;
}

.hero-grid,
.split-section {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 42px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 12px;
  max-width: 900px;
  font-size: clamp(38px, 5.5vw, 64px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.12;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 14px;
  font-size: 21px;
  line-height: 1.25;
}

.hero-role {
  margin-bottom: 12px;
  color: var(--color-accent-secondary);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 750;
  line-height: 1.2;
}

.hero-lead {
  max-width: 720px;
  color: var(--color-text);
  font-size: 21px;
  font-weight: 650;
}

.hero-text,
.section-heading p,
.text-block p,
.info-card p,
.project-card p {
  color: var(--color-text-muted);
}

.hero-text {
  max-width: 720px;
  margin-bottom: 30px;
}

.hero-actions,
.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button,
.project-links a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-weight: 750;
  padding: 10px 16px;
  transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease, color 180ms ease;
}

.button:hover,
.project-links a:hover {
  transform: translateY(-2px);
}

.button-primary {
  border-color: transparent;
  background: var(--color-accent);
  color: #07111f;
}

.button-secondary {
  border-color: rgba(167, 139, 250, 0.44);
  background: rgba(167, 139, 250, 0.14);
  color: var(--color-text);
}

.button-ghost {
  color: var(--color-text-muted);
}

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

.hero-panel,
.info-card,
.project-card,
.contacts-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.94), rgba(17, 24, 39, 0.92));
  box-shadow: var(--shadow-soft);
}

.hero-panel {
  padding: 26px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  border: 1px solid rgba(34, 197, 94, 0.28);
  border-radius: 999px;
  background: rgba(34, 197, 94, 0.09);
  color: var(--color-text);
  font-size: 14px;
  font-weight: 750;
  padding: 8px 12px;
}

.status-pill span {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--color-success);
}

.profile-list {
  display: grid;
  gap: 18px;
  margin: 0;
}

.profile-list div {
  border-top: 1px solid var(--color-border);
  padding-top: 18px;
}

.profile-list dt {
  color: var(--color-text-muted);
  font-size: 14px;
  margin-bottom: 4px;
}

.profile-list dd {
  margin: 0;
  font-weight: 700;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 30px;
}

.split-section .section-heading {
  margin-bottom: 0;
}

.text-block {
  font-size: 18px;
}

.accent-note {
  border-left: 3px solid var(--color-accent);
  background: var(--color-accent-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 18px;
}

.skills-grid,
.position-grid,
.projects-grid {
  display: grid;
  gap: 18px;
}

.skills-grid,
.position-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.info-card {
  padding: 24px;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.info-card:hover,
.project-card:hover {
  border-color: rgba(56, 189, 248, 0.36);
  background: var(--color-card-hover);
  transform: translateY(-3px);
}

.tag-list,
.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tag-list li,
.tech-list li {
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.38);
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.35;
  padding: 7px 10px;
}

.projects-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.project-card {
  overflow: hidden;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.media-placeholder {
  min-height: 184px;
  display: grid;
  place-items: center;
  border-bottom: 1px solid var(--color-border);
  background:
    linear-gradient(135deg, rgba(56, 189, 248, 0.15), transparent 45%),
    linear-gradient(315deg, rgba(167, 139, 250, 0.17), transparent 52%),
    #111827;
  color: var(--color-text-muted);
  font-size: 15px;
  font-weight: 800;
  text-align: center;
  text-transform: uppercase;
}

.project-media {
  width: 100%;
  height: 184px;
  display: block;
  border-bottom: 1px solid var(--color-border);
  background: #111827;
  object-fit: cover;
}

.project-body {
  padding: 22px;
  font-size: 16px;
}

.project-body p {
  min-height: 54px;
}

.tech-list {
  margin: 18px 0;
}

.project-links a {
  flex: 1 1 104px;
  color: var(--color-text);
  background: rgba(15, 23, 42, 0.4);
}

.project-links a[href="#"] {
  color: var(--color-text-muted);
}

/* Project card specific layout: buttons in 2 columns */
.project-card .project-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

/* Make buttons occupy full column and look consistent */
.project-card .project-links .button,
.project-card .project-links a.button {
  width: 100%;
  justify-content: center;
  font-size: 16px;
  line-height: 1.35;
}

/* Inactive / disabled GitHub button style (muted, GitHub-like) */
.button[disabled],
.button[aria-disabled="true"],
.button.disabled {
  background: rgba(148, 163, 184, 0.08);
  color: var(--color-text-muted);
  border-color: rgba(148, 163, 184, 0.12);
  cursor: not-allowed;
  transform: none;
}

/* Larger project headings and emphasized meta labels */
.project-body h3 {
  font-size: 24px;
  margin-bottom: 8px;
}

.project-subtitle {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
}

.project-meta span {
  display: block;
  font-weight: 700;
  font-size: 16px;
  color: var(--color-text);
  margin-bottom: 6px;
}

.project-bullets {
  margin: 12px 0 16px 0;
  padding-left: 18px;
}

.project-bullets li {
  font-size: 16px;
  margin-bottom: 6px;
}

.contacts-card {
  display: grid;
  gap: 14px;
  padding: 24px;
  font-style: normal;
}

.contacts-card a {
  color: var(--color-accent);
  font-weight: 750;
  overflow-wrap: anywhere;
}

.contacts-card a:hover,
.contacts-card a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 28px 0;
}

.site-footer a {
  color: var(--color-text);
  font-weight: 750;
}

.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-card);
  color: var(--color-text);
  cursor: pointer;
  font-size: 22px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 180ms ease, transform 180ms ease, background-color 180ms ease;
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-card-hover);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 920px) {
  .hero-grid,
  .split-section,
  .skills-grid,
  .position-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .section {
    padding: 64px 0;
  }
}

@media (max-width: 680px) {
  body {
    font-size: 16px;
  }

  .container {
    width: min(100% - 28px, var(--container));
  }

  .header-inner {
    min-height: auto;
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
    gap: 10px;
  }

  .site-nav {
    width: 100%;
    justify-content: flex-start;
    gap: 6px;
  }

  .site-nav a {
    font-size: 14px;
    padding: 7px 9px;
  }

  .section {
    scroll-margin-top: 132px;
  }

  .hero-actions .button {
    flex: 1 1 100%;
  }

  .hero-panel,
  .info-card,
  .project-body,
  .contacts-card {
    padding: 20px;
  }

  .media-placeholder {
    min-height: 156px;
  }

  .project-media {
    height: 156px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }
}

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

  .reveal {
    opacity: 1;
    transform: none;
  }
}