/* ═══════════════════════════════════════════════════════════
   ANUJ RAGHAV — Personal Site
   style.css  |  Shared across all pages
   ═══════════════════════════════════════════════════════════ */

/* ─── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }

/* ─── Variables ──────────────────────────────────────────── */
:root {
  --navy:        #07111f;
  --navy-2:      #0c1b36;
  --navy-3:      #152847;
  --navy-4:      #1e3560;
  --blue:        #1a4faa;
  --blue-mid:    #2563c4;
  --blue-light:  #5b96e8;
  --red:         #e8320a;
  --red-dark:    #c42808;
  --white:       #ffffff;
  --off-white:   #f4f6fa;
  --grey-1:      #e4e9f2;
  --grey-2:      #8e9ab0;
  --grey-3:      #4a5568;
  --text:        #18243a;

  --font-display: 'Syne', sans-serif;
  --font-body:    'DM Sans', sans-serif;
  --font-mono:    'DM Mono', monospace;

  --radius:      0.5rem;
  --radius-lg:   1rem;
  --trans:       0.2s ease;
  --shadow-sm:   0 2px 12px rgba(0,0,0,0.06);
  --shadow-md:   0 8px 32px rgba(0,0,0,0.10);
  --shadow-lg:   0 20px 60px rgba(0,0,0,0.14);
}

/* ─── Base ───────────────────────────────────────────────── */
body {
  font-family: var(--font-body);
  background: var(--white);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--blue); text-decoration: none; transition: color var(--trans); }
a:hover { color: var(--red); }
img { display: block; max-width: 100%; }
p + p { margin-top: 0.9rem; }

/* ─── Layout ─────────────────────────────────────────────── */
.container {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 2rem;
}
.container--narrow { max-width: 760px; }
.section { padding: 6rem 2rem; }
.section--dark  { background: var(--navy-2); }
.section--navy  { background: var(--navy); }
.section--grey  { background: var(--off-white); }
.section--white { background: var(--white); }

/* ─── Typography helpers ─────────────────────────────────── */
.label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--red);
  display: block;
  margin-bottom: 0.6rem;
}
.label--light { color: rgba(255,255,255,0.4); }

.heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--navy-2);
  letter-spacing: -0.02em;
}
.heading--light { color: var(--white); }
.heading--sm {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--navy-2);
  letter-spacing: -0.01em;
}

.rule {
  width: 2.5rem; height: 3px;
  background: var(--red);
  border-radius: 2px;
  margin: 1rem 0 1.8rem;
}

.lead {
  font-size: 1.05rem;
  color: var(--grey-3);
  line-height: 1.8;
  max-width: 640px;
}
.lead--light { color: rgba(255,255,255,0.62); }

/* ─── Nav ────────────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: 58px;
  background: rgba(7,17,31,0.93);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.055);
  z-index: 200;
  display: flex;
  align-items: center;
  padding: 0 2rem;
  justify-content: space-between;
}
.nav__brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--white);
  letter-spacing: 0.01em;
}
.nav__brand span { color: var(--red); }
.nav__links {
  display: flex;
  list-style: none;
  gap: 0.2rem;
}
.nav__links a {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius);
  transition: all var(--trans);
}
.nav__links a:hover,
.nav__links a.active {
  color: var(--white);
  background: rgba(255,255,255,0.07);
}
.nav__links a.active { color: var(--white); }
.nav__menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: rgba(255,255,255,0.7);
  padding: 0.3rem;
}
.nav__mobile {
  display: none;
  position: fixed;
  top: 58px; left: 0; right: 0;
  background: rgba(7,17,31,0.97);
  border-bottom: 1px solid rgba(255,255,255,0.07);
  padding: 1rem 2rem 1.5rem;
  z-index: 199;
  flex-direction: column;
  gap: 0.3rem;
}
.nav__mobile.open { display: flex; }
.nav__mobile a {
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255,255,255,0.55);
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.nav__mobile a:hover { color: var(--white); }

/* ─── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.65rem 1.45rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  border: none;
  transition: all var(--trans);
  text-decoration: none;
}
.btn--primary {
  background: var(--white);
  color: var(--navy-2);
}
.btn--primary:hover {
  background: var(--grey-1);
  color: var(--navy-2);
  transform: translateY(-1px);
}
.btn--outline {
  background: transparent;
  color: rgba(255,255,255,0.78);
  border: 1.5px solid rgba(255,255,255,0.22);
}
.btn--outline:hover {
  background: rgba(255,255,255,0.08);
  color: var(--white);
  transform: translateY(-1px);
}
.btn--dark {
  background: var(--navy-2);
  color: var(--white);
}
.btn--dark:hover {
  background: var(--navy-3);
  transform: translateY(-1px);
}
.btn--ghost {
  background: transparent;
  color: var(--navy-2);
  border: 1.5px solid var(--grey-1);
}
.btn--ghost:hover {
  border-color: var(--blue);
  color: var(--blue);
}

/* ─── Tags ───────────────────────────────────────────────── */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.22rem 0.65rem;
  border-radius: 2rem;
  background: var(--grey-1);
  color: var(--grey-3);
  white-space: nowrap;
}
.tag--blue { background: rgba(26,79,170,0.1); color: var(--blue-mid); }
.tag--red  { background: rgba(232,50,10,0.09); color: var(--red); }
.tag--dark {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.5);
}
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }

/* ─── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--white);
  border: 1px solid var(--grey-1);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--trans);
  position: relative;
  overflow: hidden;
}
.card:hover {
  border-color: rgba(26,79,170,0.3);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.card--dark {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
}
.card--dark:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.13);
  transform: translateY(-2px);
}
.card--dark::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.card--dark:hover::before { transform: scaleX(1); }

/* ─── Grid texture ───────────────────────────────────────── */
.grid-bg::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.024) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.024) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

/* ─── Footer ─────────────────────────────────────────────── */
.footer {
  background: var(--navy);
  border-top: 1px solid rgba(255,255,255,0.055);
  padding: 2.2rem 2rem;
  text-align: center;
}
.footer__text {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: rgba(255,255,255,0.22);
  letter-spacing: 0.06em;
}
.footer__text a {
  color: rgba(255,255,255,0.38);
  border-bottom: 1px solid rgba(255,255,255,0.14);
}
.footer__text a:hover { color: rgba(255,255,255,0.65); }

/* ─── Scroll reveal ──────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ─── Page header (inner pages) ──────────────────────────── */
.page-header {
  padding: 8rem 2rem 5rem;
  background: var(--navy);
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.024) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.024) 1px, transparent 1px);
  background-size: 44px 44px;
}
.page-header::after {
  content: "";
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 60px;
  background: var(--white);
  clip-path: ellipse(55% 100% at 50% 100%);
}
.page-header--grey::after { background: var(--off-white); }
.page-header__inner {
  position: relative;
  max-width: 1060px;
  margin: 0 auto;
}

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__menu-btn { display: block; }
  .section { padding: 4rem 1.5rem; }
  .page-header { padding: 7rem 1.5rem 4.5rem; }
}