:root {
  --background: #080d1a;
  --surface: #0e1628;
  --surface-light: #121e34;
  --border: #23324b;
  --text: #edf3ff;
  --muted: #a0aec5;
  --accent: #65a5ff;
  --accent-light: #9bc5ff;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  background: var(--background);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

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

button {
  font: inherit;
}

.container {
  width: min(90%, var(--max-width));
  margin-inline: auto;
}

.section {
  padding: 90px 0;
}

.section-alt {
  background: #0a1120;
}

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

span {
  color: var(--accent);
}

::selection {
  background: var(--accent);
  color: #07101e;
}

:focus-visible {
  outline: 3px solid var(--accent-light);
  outline-offset: 4px;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 1000;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--accent);
  color: #07101e;
}

.skip-link:focus {
  top: 16px;
}

/* Navigation */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 13, 26, 0.95);
  border-bottom: 1px solid rgba(101, 165, 255, 0.13);
  backdrop-filter: blur(16px);
}

.navbar {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -1px;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.88rem;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--accent-light);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  cursor: pointer;
}

.menu-toggle span {
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
}

/* Hero */

.hero {
  min-height: 620px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 50px;
}

.eyebrow {
  margin-bottom: 16px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 3px;
}

.hero h1 {
  margin-bottom: 18px;
  font-size: clamp(2.5rem, 5vw, 4.4rem);
  line-height: 1.12;
  letter-spacing: -2px;
}

.hero h1 span {
  display: block;
  margin-top: 8px;
  color: var(--accent-light);
}

.hero h2 {
  margin-bottom: 20px;
  color: #d8e5fa;
  font-size: clamp(1.1rem, 2.2vw, 1.45rem);
  font-weight: 500;
}

.hero-description {
  max-width: 620px;
  font-size: 1.02rem;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 700;
  transition:
    transform 0.2s ease,
    background 0.2s ease;
}

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

.button-primary {
  background: var(--accent);
  color: #07101e;
}

.button-primary:hover {
  background: var(--accent-light);
}

.button-outline {
  border-color: var(--border);
  color: var(--text);
}

.button-outline:hover {
  background: var(--surface);
  border-color: var(--accent);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.hero-tags span,
.project-tags span {
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: var(--surface);
  color: #c5d7f3;
  font-size: 0.78rem;
}

/* Hero graphic */

.hero-visual {
  min-height: 380px;
  position: relative;
  display: grid;
  place-items: center;
}

.visual-glow {
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(61, 125, 219, 0.14);
  filter: blur(45px);
}

.shield-card {
  position: relative;
  z-index: 1;
  width: min(100%, 330px);
  padding: 40px 24px;
  text-align: center;
  background: linear-gradient(145deg, #182c4c, #0b1324);
  border: 1px solid #29476f;
  border-radius: 24px;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.25);
}

.shield-icon {
  width: 112px;
  height: 112px;
  margin: 0 auto 22px;
  color: var(--accent-light);
}

.visual-title {
  color: var(--text);
  font-size: 1.35rem;
  font-weight: 700;
}

.visual-subtitle {
  margin-top: 4px;
  font-size: 0.9rem;
}

.status-line {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 25px;
  padding: 8px 13px;
  border: 1px solid var(--border);
  border-radius: 100px;
  color: #cbd8ec;
  font-size: 0.8rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.floating-code {
  position: absolute;
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-light);
  font-size: 1.3rem;
  font-weight: 700;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.code-one {
  top: 25px;
  left: 2px;
}

.code-two {
  right: 0;
  bottom: 28px;
}

/* Section headings */

.section-heading {
  max-width: 720px;
  margin: 0 auto 45px;
  text-align: center;
}

.section-heading h2 {
  margin-bottom: 12px;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.2;
  letter-spacing: -1px;
}

.section-heading h2 span {
  color: var(--accent-light);
}

/* About */

.about-card {
  max-width: 850px;
  margin: 0 auto;
  padding: 34px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
}

.about-card p + p {
  margin-top: 18px;
}

.about-card p {
  font-size: 1.02rem;
}

/* Skills */

.skills-panel {
  padding: 34px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.skill-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid #2a4163;
  border-radius: 8px;
  background: #111e33;
  color: #dce9fc;
  font-size: 0.92rem;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease;
}

.skill-tag:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.skills-note {
  margin-top: 28px;
  text-align: center;
  font-size: 0.9rem;
}

/* Projects */

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.project-card {
  padding: 30px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
  transition:
    transform 0.2s ease,
    border-color 0.2s ease;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: #426b9f;
}

.project-icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin-bottom: 24px;
  border: 1px solid #29476f;
  border-radius: 13px;
  background: #142642;
  color: var(--accent-light);
}

.project-icon svg {
  width: 28px;
  height: 28px;
}

.project-label,
.timeline-label {
  margin-bottom: 8px;
  color: var(--accent);
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 1.6px;
}

.project-card h3,
.timeline-card h3,
.experience-card h3 {
  margin-bottom: 12px;
  color: var(--text);
  font-size: 1.3rem;
}

.project-card > p:not(.project-label) {
  font-size: 0.95rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

/* Education */

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 10px;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-left: 42px;
}

.timeline-item + .timeline-item {
  margin-top: 26px;
}

.timeline-dot {
  position: absolute;
  top: 12px;
  left: 3px;
  width: 16px;
  height: 16px;
  border: 3px solid var(--accent);
  border-radius: 50%;
  background: var(--background);
}

.timeline-card {
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
}

.timeline-place {
  margin-bottom: 10px;
  color: var(--accent-light);
  font-weight: 600;
}

/* Experience */

.experience-card {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
  padding: 30px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
}

.experience-mark {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border: 1px solid #29476f;
  border-radius: 14px;
  background: #142642;
  color: var(--accent-light);
  font-size: 1.6rem;
  font-weight: 800;
}

/* Contact */

.contact-card {
  max-width: 680px;
  margin: 0 auto;
  padding: 42px 28px;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
}

.contact-symbol {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border: 1px solid #29476f;
  border-radius: 50%;
  background: #142642;
  color: var(--accent-light);
  font-size: 1.8rem;
  font-weight: 700;
}

.contact-card h3 {
  margin-bottom: 8px;
  font-size: 1.35rem;
}

.contact-email {
  display: inline-block;
  margin-top: 12px;
  color: var(--accent-light);
  overflow-wrap: anywhere;
}

.contact-email:hover {
  text-decoration: underline;
}

.social-links {
  display: flex;
  justify-content: center;
  margin-top: 25px;
}

.social-link {
  display: inline-block;
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-light);
  color: var(--accent-light);
  font-weight: 600;
  transition:
    background 0.2s ease,
    border-color 0.2s ease;
}

.social-link:hover {
  background: #172945;
  border-color: var(--accent);
}

/* Footer */

.site-footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  background: #070b15;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-content p {
  font-size: 0.85rem;
  text-align: center;
}

.back-to-top {
  color: var(--accent-light);
  font-size: 0.85rem;
}

.back-to-top:hover {
  text-decoration: underline;
}

/* Responsive design */

@media (max-width: 1000px) {
  .nav-links {
    gap: 13px;
  }

  .nav-links a {
    font-size: 0.8rem;
  }
}

@media (max-width: 820px) {
  .section {
    padding: 76px 0;
  }

  .navbar {
    min-height: 70px;
  }

  .menu-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 5% 18px;
    border-bottom: 1px solid var(--border);
    background: #0b1221;
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    display: block;
    padding: 12px 8px;
    font-size: 0.95rem;
  }

  .hero {
    min-height: auto;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .hero-content {
    padding-top: 10px;
  }

  .hero-visual {
    min-height: 330px;
  }

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

@media (max-width: 520px) {
  .container {
    width: 91%;
  }

  .section {
    padding: 64px 0;
  }

  .hero h1 {
    font-size: 2.55rem;
    letter-spacing: -1.2px;
  }

  .hero-description {
    font-size: 0.96rem;
  }

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

  .button {
    width: 100%;
  }

  .hero-visual {
    min-height: 300px;
  }

  .shield-card {
    width: 90%;
    padding: 32px 18px;
  }

  .shield-icon {
    width: 90px;
    height: 90px;
  }

  .about-card,
  .skills-panel,
  .project-card,
  .timeline-card,
  .experience-card,
  .contact-card {
    padding: 23px;
  }

  .skills-list {
    gap: 10px;
  }

  .skill-tag {
    padding: 8px 12px;
    font-size: 0.85rem;
  }

  .experience-card {
    flex-direction: column;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}