/* =============================================================
   Shivam Sharma — portfolio
   Modern dev-minimal: the page as a well-commented source file.
   JetBrains Mono = structural/machine layer, Inter = prose layer.
   ============================================================= */

:root {
  /* dark is the default theme (also the no-JS fallback) */
  --bg: #0b0e13;
  --bg-soft: #0f131a;
  --surface: #141a22;
  --surface-2: #1a212b;
  --border: #262d39;
  --border-soft: #1d232d;

  --text: #e7ebf2;
  --text-muted: #97a1b1;
  --text-faint: #8b95a2;

  --accent: #58b7f5;        /* interactive: links, buttons, focus */
  --accent-strong: #7cc7f7;
  --accent-contrast: #06121c; /* text on filled accent */
  --comment: #7ea87a;       /* reserved for the // section markers */

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

  --radius: 14px;
  --radius-sm: 10px;
  --maxw: 1080px;
  --pad-x: clamp(1.25rem, 5vw, 2.5rem);
  --shadow: 0 1px 0 rgba(255, 255, 255, 0.02), 0 12px 30px -18px rgba(0, 0, 0, 0.7);
}

:root[data-theme="light"] {
  --bg: #fbfcfd;
  --bg-soft: #f3f5f8;
  --surface: #ffffff;
  --surface-2: #f1f4f8;
  --border: #e2e7ee;
  --border-soft: #eaeef3;

  --text: #1a2029;
  --text-muted: #566171;
  --text-faint: #5f6975;

  --accent: #1774d1;
  --accent-strong: #135fac;
  --accent-contrast: #ffffff;
  --comment: #4f7d4a;

  --shadow: 0 1px 0 rgba(16, 24, 40, 0.02), 0 14px 30px -20px rgba(16, 24, 40, 0.25);
}

/* ---------- base ---------- */

*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

a { color: var(--accent); text-decoration: none; }

h1, h2, h3 { margin: 0; line-height: 1.1; font-weight: 700; }

ul { margin: 0; padding: 0; list-style: none; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

/* Visible focus for keyboard users only */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translate(-50%, -120%);
  z-index: 100;
  background: var(--accent);
  color: var(--accent-contrast);
  font-family: var(--mono);
  font-size: 0.85rem;
  padding: 0.5rem 0.9rem;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  transition: transform 0.18s ease;
}
.skip-link:focus { transform: translate(-50%, 0); }

/* ---------- nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border-soft);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 60px;
}

.wordmark {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.wordmark:hover { color: var(--accent); }

.nav__links {
  display: flex;
  gap: 1.35rem;
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.85rem;
}
.nav__links a {
  color: var(--text-muted);
  position: relative;
  padding: 0.15rem 0;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1.5px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}
.nav__links a:hover { color: var(--text); }
.nav__links a:hover::after { transform: scaleX(1); }

.theme-toggle {
  margin-left: 0.25rem;
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
  flex-shrink: 0;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
.nav__links + .theme-toggle { margin-left: 1rem; }
html:not(.js) .theme-toggle { display: none; }

.theme-toggle__icon { grid-area: 1 / 1; }
:root[data-theme="light"] .theme-toggle__icon--sun { display: none; }
:root[data-theme="dark"] .theme-toggle__icon--moon,
:root:not([data-theme="light"]) .theme-toggle__icon--moon { display: none; }

/* ---------- hero ---------- */

.hero {
  padding-top: clamp(2.75rem, 7vw, 5rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
  border-bottom: 1px solid var(--border-soft);
}

.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.9fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.hero__text { min-width: 0; }

.hero__eyebrow {
  font-family: var(--mono);
  color: var(--comment);
  font-size: 0.9rem;
  margin: 0 0 1rem;
  letter-spacing: 0.01em;
}

.hero__name {
  font-size: clamp(2.6rem, 6.5vw, 4.25rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.02;
  margin: 0;
}

.hero__tagline {
  color: var(--text-muted);
  font-size: clamp(1.02rem, 1.6vw, 1.18rem);
  max-width: 34ch;
  margin: 1.15rem 0 0;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.9rem;
}

.btn {
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.72rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  line-height: 1;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary {
  background: var(--accent);
  color: var(--accent-contrast);
}
.btn--primary:hover { background: var(--accent-strong); }
.btn--ghost {
  border-color: var(--border);
  color: var(--text);
  background: var(--surface);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

.social-row {
  display: flex;
  gap: 0.35rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}
.social-row a {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: color 0.18s ease, background 0.18s ease, transform 0.15s ease;
}
.social-row a:hover {
  color: var(--accent);
  background: var(--surface);
  transform: translateY(-2px);
}

.hero__portrait {
  justify-self: center;
  width: min(320px, 78vw);
  aspect-ratio: 1;
  border-radius: 22px;
  padding: 4px;
  background: linear-gradient(150deg, color-mix(in srgb, var(--accent) 55%, transparent), transparent 60%), var(--border);
  box-shadow: var(--shadow);
}
.hero__portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 18px;
}

/* ---------- section shell ---------- */

.section { padding-block: clamp(3.5rem, 8vw, 6rem); }
.section:nth-of-type(even) { background: var(--bg-soft); }

.section__heading {
  font-family: var(--mono);
  font-weight: 600;
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  color: var(--text);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}
.section__heading .comment { color: var(--comment); }
.section__heading::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ---------- about ---------- */

.about {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: clamp(1.75rem, 5vw, 3.5rem);
  align-items: start;
}
.about__skills { min-width: 0; }
.about__bio {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  line-height: 1.6;
  color: var(--text);
  margin: 0;
  max-width: 46ch;
}

.skills__label {
  font-family: var(--mono);
  color: var(--comment);
  font-size: 0.82rem;
  margin: 0 0 0.85rem;
}
.skills {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 0.6rem;
}
.skills li {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.75rem;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.skills li:hover { color: var(--text); border-color: var(--accent); }

/* ---------- work / project cards ---------- */

.projects {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: 1.1rem;
}
.card {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
.card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
  box-shadow: var(--shadow);
}
.card__icon {
  width: 56px;
  height: 56px;
  border-radius: 13px;
  overflow: hidden;
  background: var(--surface-2);
  border: 1px solid var(--border-soft);
  flex-shrink: 0;
}
.card__icon img { width: 100%; height: 100%; object-fit: cover; }
.card__icon--mono {
  display: grid;
  place-items: center;
  border: none;
  background: linear-gradient(135deg, var(--accent), #7b6ef6);
}
.card__icon--mono span {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1.7rem;
  color: #fff;
}
.card__title {
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-top: 0.15rem;
}
.card__desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 0;
  flex: 1;
}
.card__link {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--accent);
  margin-top: 0.35rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  align-self: flex-start;
}
.card__link:hover { color: var(--accent-strong); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- blog ---------- */

.posts { border-top: 1px solid var(--border); }
.post { border-bottom: 1px solid var(--border); }
.post__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 0.4rem;
  color: var(--text);
  transition: padding-left 0.18s ease, color 0.18s ease;
}
.post__link:hover { padding-left: 0.9rem; color: var(--accent); }
.post__title { font-size: 1.05rem; font-weight: 500; }
.post__date {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-faint);
  white-space: nowrap;
  flex-shrink: 0;
}

/* ---------- footer / contact ---------- */

.footer {
  padding-block: clamp(3.5rem, 8vw, 6rem) clamp(2rem, 5vw, 3rem);
  border-top: 1px solid var(--border-soft);
  background: var(--bg-soft);
}
.footer__lead {
  color: var(--text-muted);
  max-width: 44ch;
  margin: 0 0 1.5rem;
}
.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.5rem;
  font-family: var(--mono);
  font-size: 0.9rem;
}
.footer__links a { color: var(--text-muted); }
.footer__links a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.footer__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  margin-top: 2.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-faint);
}

/* ---------- progressive scroll reveal (JS only) ---------- */

.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .hero__inner { grid-template-columns: minmax(0, 1fr); }
  .hero__portrait { grid-row: 1; justify-self: start; }
  .about { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 600px) {
  .nav__links { display: none; }
  .nav__links + .theme-toggle { margin-left: auto; }
  .post__link { flex-direction: column; gap: 0.25rem; }
  .post__date { order: -1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover, .card:hover, .social-row a:hover { transform: none; }
  * { transition-duration: 0.001ms !important; }
}