/* =========================================================================
   shikhargupta.dev — stylesheet
   Design language: dark "editor" surface, one violet accent tied to the
   .NET brand, one teal accent reserved for AI/LLM content, JetBrains Mono
   for code and structural marks, Inter for reading text.
   ========================================================================= */

/* ---------- Tokens ---------- */
:root {
  --bg: #0b0e14;
  --bg-raised: #121722;
  --bg-raised-2: #161c29;
  --border: rgba(231, 233, 238, 0.09);
  --border-strong: rgba(231, 233, 238, 0.16);

  --text: #e9ebf1;
  --text-muted: #99a2b6;
  --text-faint: #62697c;

  --accent: #7c6fea;       /* .NET-adjacent violet — primary */
  --accent-strong: #9c90ff;
  --accent-soft: rgba(124, 111, 234, 0.12);

  --accent-ai: #33d0ba;    /* teal — reserved for AI / LLM content */
  --accent-ai-soft: rgba(51, 208, 186, 0.12);

  --code-string: #9fd88f;
  --code-type: #7fb8e0;
  --code-keyword: #c792ea;
  --code-comment: #62697c;

  --radius-sm: 6px;
  --radius-md: 12px;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --container: 1120px;
  --section-y: 7rem;
  --nav-h: 68px;
}

@media (max-width: 720px) {
  :root {
    --section-y: 4rem;
  }
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
h1, h2, h3, h4, p { margin: 0; }

::selection { background: var(--accent-soft); color: var(--accent-strong); }

:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--accent);
  color: #0b0e14;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 200;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 1rem; }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

@media (max-width: 720px) {
  .container { padding-inline: 1.25rem; }
}

section { padding-block: var(--section-y); }
section:first-of-type { padding-top: calc(var(--nav-h) + 3rem); }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  margin-bottom: 2.75rem;
}
.section-head::before {
  content: "";
  width: 28px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-ai));
  flex-shrink: 0;
  transform: translateY(-4px);
}
.section-head h2 {
  font-size: clamp(1.6rem, 1.3rem + 1vw, 2.1rem);
  font-weight: 650;
  letter-spacing: -0.01em;
}
.section-kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-strong);
  margin-bottom: 0.5rem;
}
.section-lede {
  color: var(--text-muted);
  max-width: 62ch;
  margin-top: 0.75rem;
  font-size: 1.02rem;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.35rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #0b0e14; }
.btn-primary:hover { background: var(--accent-strong); }
.btn-outline { background: transparent; border-color: var(--border-strong); color: var(--text); }
.btn-outline:hover { border-color: var(--accent-strong); color: var(--accent-strong); }
.btn-ghost { background: transparent; color: var(--text-muted); }
.btn-ghost:hover { color: var(--text); }
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  z-index: 100;
  background: rgba(11, 14, 20, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav .container { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }

.brand {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text);
  display: flex;
  align-items: center;
}
.brand span { color: var(--accent-strong); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  font-size: 0.94rem;
  color: var(--text-muted);
  transition: color 0.15s ease;
  position: relative;
}
.nav-links a:hover, .nav-links a.is-active { color: var(--text); }
.nav-links a.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -8px;
  height: 2px;
  background: var(--accent);
}

.nav-actions { display: flex; align-items: center; gap: 0.75rem; }
.nav-cta { display: inline-flex; }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}
.nav-toggle svg { width: 22px; height: 22px; }

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: inline-flex; }
}

.mobile-menu {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  background: var(--bg);
  z-index: 99;
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}
.mobile-menu.is-open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.mobile-menu a {
  font-size: 1.15rem;
  padding: 0.9rem 0.25rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
.mobile-menu .btn { margin-top: 1.5rem; justify-content: center; }
.mobile-menu .socials { margin-top: auto; padding-top: 1.5rem; }

/* ---------- Hero ---------- */
.hero .container {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3.5rem;
  align-items: center;
}
@media (max-width: 900px) {
  .hero .container { grid-template-columns: 1fr; gap: 2.5rem; }
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-strong);
  margin-bottom: 1.1rem;
}
.hero-eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent-ai);
  box-shadow: 0 0 0 3px var(--accent-ai-soft);
}

.hero h1 {
  font-size: clamp(2.1rem, 1.5rem + 2.6vw, 3.4rem);
  font-weight: 680;
  letter-spacing: -0.02em;
  line-height: 1.12;
}
.hero h1 .name { display: block; }
.hero h1 .role {
  display: block;
  color: var(--text-muted);
  font-size: 0.5em;
  font-weight: 500;
  margin-top: 0.6rem;
  letter-spacing: 0;
}

.hero-desc {
  margin-top: 1.4rem;
  color: var(--text-muted);
  font-size: 1.08rem;
  max-width: 46ch;
}

.hero-ctas {
  margin-top: 2.1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.hero-socials {
  margin-top: 2.25rem;
  display: flex;
  gap: 0.9rem;
}
.icon-link {
  width: 40px; height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: color 0.15s ease, border-color 0.15s ease;
}
.icon-link:hover { color: var(--accent-strong); border-color: var(--accent-strong); }
.icon-link svg { width: 19px; height: 19px; }

/* Code panel */
.code-panel {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 30px 60px -30px rgba(0,0,0,0.6);
}
.code-panel-tab {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1rem;
  background: var(--bg-raised-2);
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}
.code-panel-tab::before {
  content: "";
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-ai);
}
.code-panel pre {
  margin: 0;
  padding: 1.5rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.75;
}
.code-panel code { color: var(--text); }
.tok-kw { color: var(--code-keyword); }
.tok-type { color: var(--code-type); }
.tok-str { color: var(--code-string); }
.tok-comment { color: var(--code-comment); font-style: italic; }
.code-cursor {
  display: inline-block;
  width: 7px; height: 1em;
  background: var(--accent-ai);
  margin-left: 2px;
  vertical-align: -0.15em;
  animation: blink 1.1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 3rem;
}
@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
}
.about-copy p { color: var(--text-muted); font-size: 1.04rem; }
.about-copy p + p { margin-top: 1.1rem; }
.about-copy strong { color: var(--text); font-weight: 600; }

.interest-list {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}
.interest-list li {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.7rem 0.9rem;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text-muted);
}
.interest-list li svg { width: 17px; height: 17px; color: var(--accent-strong); flex-shrink: 0; }

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
@media (max-width: 900px) { .skills-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .skills-grid { grid-template-columns: 1fr; } }

.skill-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.4rem;
}
.skill-card.is-ai { border-color: rgba(51, 208, 186, 0.22); background: linear-gradient(180deg, var(--accent-ai-soft), transparent 40%), var(--bg-raised); }
.skill-card-head {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 1rem;
}
.skill-card-icon {
  width: 34px; height: 34px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.skill-card.is-ai .skill-card-icon { background: var(--accent-ai-soft); color: var(--accent-ai); }
.skill-card-icon svg { width: 18px; height: 18px; }
.skill-card h3 { font-size: 1rem; font-weight: 600; }

.chip-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--border-strong);
  border-radius: 5px;
  color: var(--text-muted);
}

/* ---------- Experience ---------- */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: "";
  position: absolute;
  left: 5px; top: 6px; bottom: 6px;
  width: 1px;
  background: var(--border-strong);
}
.timeline-item { position: relative; padding-bottom: 2.75rem; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -2rem;
  top: 6px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
}
.timeline-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.6rem 1.75rem;
}
.timeline-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-bottom: 0.35rem;
}
.timeline-role { font-size: 1.08rem; font-weight: 650; }
.timeline-dates { font-family: var(--font-mono); font-size: 0.82rem; color: var(--text-faint); flex-shrink: 0; }
.timeline-org { color: var(--accent-strong); font-size: 0.95rem; margin-bottom: 1rem; }
.timeline-points { display: flex; flex-direction: column; gap: 0.55rem; }
.timeline-points li {
  padding-left: 1.15rem;
  position: relative;
  color: var(--text-muted);
  font-size: 0.97rem;
}
.timeline-points li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.6em;
  width: 5px; height: 5px;
  background: var(--accent);
  border-radius: 50%;
}

/* ---------- Projects ---------- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
@media (max-width: 860px) { .project-grid { grid-template-columns: 1fr; } }

.project-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.85rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  transition: border-color 0.15s ease;
}
.project-card:hover { border-color: var(--border-strong); }
.project-card.is-ai { border-color: rgba(51, 208, 186, 0.2); }

.project-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; }
.project-name { font-size: 1.18rem; font-weight: 650; }
.project-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.3rem 0.55rem;
  border-radius: 5px;
  background: var(--accent-ai-soft);
  color: var(--accent-ai);
  white-space: nowrap;
  flex-shrink: 0;
}
.project-desc { color: var(--text-muted); font-size: 0.97rem; }

.project-meta { display: flex; flex-direction: column; gap: 0.9rem; }
.project-meta-block h4 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-faint);
  font-weight: 500;
  margin-bottom: 0.4rem;
}
.project-meta-block p, .project-meta-block li { color: var(--text-muted); font-size: 0.93rem; }
.project-meta-block ul { display: flex; flex-direction: column; gap: 0.3rem; }
.project-meta-block ul li { padding-left: 1rem; position: relative; }
.project-meta-block ul li::before {
  content: "–";
  position: absolute; left: 0; color: var(--text-faint);
}

.project-tech { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: auto; padding-top: 0.4rem; }
.project-links { display: flex; gap: 0.75rem; }

/* ---------- Architecture ---------- */
.arch-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
@media (max-width: 860px) { .arch-grid { grid-template-columns: 1fr; } }

.arch-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
}
.arch-card h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 1.4rem;
  color: var(--text);
}
.arch-flow { display: flex; flex-direction: column; }
.arch-node {
  font-family: var(--font-mono);
  font-size: 0.87rem;
  padding: 0.8rem 1rem;
  background: var(--bg-raised-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: center;
}
.arch-card.is-ai .arch-node { border-color: rgba(51, 208, 186, 0.18); }
.arch-arrow {
  align-self: center;
  color: var(--text-faint);
  font-size: 0.85rem;
  padding: 0.35rem 0;
}

/* ---------- Resume ---------- */
.resume-card {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.resume-info { display: flex; align-items: center; gap: 1.1rem; }
.resume-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent-strong);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.resume-icon svg { width: 24px; height: 24px; }
.resume-info h3 { font-size: 1.05rem; font-weight: 650; margin-bottom: 0.2rem; }
.resume-info p { color: var(--text-muted); font-size: 0.92rem; }
.resume-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 3rem;
}
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; gap: 2.25rem; } }

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  margin-bottom: 1.4rem;
}
.contact-info-item .icon-link { pointer-events: none; }
.contact-info-item div h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 0.15rem; }
.contact-info-item div a, .contact-info-item div p { color: var(--text-muted); font-size: 0.93rem; }
.contact-info-item div a:hover { color: var(--accent-strong); }

.form-row { margin-bottom: 1.15rem; }
.form-row.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1.15rem; }
@media (max-width: 560px) { .form-row.two-col { grid-template-columns: 1fr; } }

label {
  display: block;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 0.45rem;
}
input, textarea {
  width: 100%;
  background: var(--bg-raised);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
  color: var(--text);
  font: inherit;
  font-size: 0.96rem;
  transition: border-color 0.15s ease;
}
input:focus, textarea:focus { border-color: var(--accent-strong); }
textarea { resize: vertical; min-height: 130px; }

.honeypot-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-status {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  display: none;
}
.form-status.is-visible { display: block; }
.form-status.is-success { background: var(--accent-ai-soft); color: var(--accent-ai); border: 1px solid rgba(51,208,186,0.3); }
.form-status.is-error { background: rgba(240, 100, 100, 0.1); color: #f18b8b; border: 1px solid rgba(240,100,100,0.3); }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 2.25rem;
}
.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.site-footer p { color: var(--text-faint); font-size: 0.87rem; }
.footer-socials { display: flex; gap: 0.6rem; }
.footer-socials .icon-link { width: 34px; height: 34px; }
.footer-socials .icon-link svg { width: 16px; height: 16px; }

/* ---------- Utilities ---------- */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}