@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;700&display=swap');

/* ── Variables ── */
:root {
  --color-bg: #0f0f14;
  --color-bg-card: #1a1a24;
  --color-bg-elevated: #22222e;
  --color-text: #e4e4e7;
  --color-text-muted: #9898a6;
  --color-accent: #8b5cf6;
  --color-accent-hover: #7c3aed;
  --color-accent-glow: rgba(139, 92, 246, 0.15);
  --color-border: #2a2a3a;

  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

  --container-max: 1100px;
  --nav-height: 64px;
  --radius: 8px;
  --transition: 200ms ease;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img { max-width: 100%; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-hover); }
ul { list-style: none; }

/* ── Base Typography ── */
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-mono);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.3rem, 2vw, 1.6rem); }

p + p { margin-top: 1rem; }

/* ── Utilities ── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

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

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: 0.75rem 1.5rem;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius);
  z-index: 1000;
  font-weight: 600;
}
.skip-link:focus { top: 1rem; }

/* ── Navigation ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(15, 15, 20, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
  position: relative;
}

.nav__brand {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 0;
}
.nav__brand:hover { color: var(--color-text); }

.nav__prompt {
  color: var(--color-accent);
  margin-right: 2px;
}

.nav__links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav__links li {
  display: flex;
  align-items: center;
}

.nav__links a {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  padding: 0.5rem 0;
  position: relative;
  transition: color var(--transition);
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition);
}

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

.nav__links a.is-active::after,
.nav__links a:hover::after {
  transform: scaleX(1);
}

/* Hamburger */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 44px;
  height: 44px;
  position: relative;
  flex-shrink: 0;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  position: relative;
  top: 0;
  transition: var(--transition);
}

.nav__toggle span::before,
.nav__toggle span::after {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  position: absolute;
  left: 0;
  transition: var(--transition);
}

.nav__toggle span::before { top: -7px; }
.nav__toggle span::after { top: 7px; }

.nav__toggle[aria-expanded="true"] span { background: transparent; }
.nav__toggle[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); }
.nav__toggle[aria-expanded="true"] span::after { top: 0; transform: rotate(-45deg); }

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: var(--nav-height);
}

.hero__terminal {
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  margin-bottom: 2rem;
  color: var(--color-text-muted);
}

.hero__prompt { color: var(--color-accent); }

.hero__typed { color: var(--color-text); }

.hero__cursor {
  display: inline-block;
  width: 10px;
  height: 1.2em;
  background: var(--color-accent);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero h1 { margin-bottom: 0.5rem; }

.hero__subtitle {
  font-size: 1.3rem;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.hero__location {
  font-size: 1rem;
  margin-bottom: 2rem;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  min-height: 44px;
  min-width: 44px;
  text-decoration: none;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
}

.btn--outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn--outline:hover {
  background: var(--color-accent-glow);
  color: var(--color-accent);
}

.btn--small {
  padding: 0.5rem 1.25rem;
  font-size: 0.9rem;
}

/* ── Page Header ── */
.page-header {
  padding: calc(var(--nav-height) + 4rem) 0 3rem;
}

.page-header h1 {
  position: relative;
  display: inline-block;
}

.page-header h1::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-accent);
  margin-top: 0.75rem;
}

/* ── Sections ── */
.section {
  padding: 2rem 0 5rem;
}

.about__content {
  max-width: 700px;
}

/* ── Cards ── */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 20px var(--color-accent-glow);
}

.card h3 { margin-bottom: 1.25rem; }

/* ── Skills ── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.skill-tag {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: var(--color-accent-glow);
  color: var(--color-accent);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: 100px;
  font-size: 0.9rem;
  font-family: var(--font-mono);
  font-weight: 400;
}

/* ── Projects ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 2rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.project-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 20px var(--color-accent-glow);
}

.project-card h3 { margin-bottom: 0.75rem; }
.project-card p { margin-bottom: 1.25rem; color: var(--color-text-muted); }

.project-links {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

/* ── Contact ── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info h2 { margin-bottom: 1rem; }
.contact-info p { color: var(--color-text-muted); margin-bottom: 1.5rem; }

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-list li { line-height: 1.5; }
.contact-list strong {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.15rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group { display: flex; flex-direction: column; gap: 0.4rem; }

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.form-group input,
.form-group textarea {
  padding: 0.75rem 1rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition);
  min-height: 44px;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.form-group textarea { resize: vertical; }

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-footer p { color: var(--color-text-muted); font-size: 0.9rem; }

.footer__links {
  display: flex;
  gap: 1.5rem;
}

.footer__links a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}
.footer__links a:hover { color: var(--color-accent); }

/* ── Scroll Reveal ── */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ── Focus ── */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav__toggle { display: block; }

  .nav__links {
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 0;
    display: none;
  }

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

  .nav__links li { display: block; }

  .nav__links a {
    display: block;
    padding: 0.85rem clamp(1.25rem, 4vw, 2.5rem);
  }


  .contact-layout { grid-template-columns: 1fr; }

  .skills-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero__actions { flex-direction: column; align-items: center; }
  .hero__actions .btn { width: 100%; max-width: 280px; }
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; }
}