/* ============================================================
 * main.css — Prince Kumar portfolio
 * Liquid-glass design system + utilities
 * ============================================================ */

html, body { background: #000; color: #fff; }
html { scroll-behavior: smooth; }
body { font-family: 'Barlow', sans-serif; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* Subtle scrollbar so it doesn't break the dark glass aesthetic */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #000; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 9999px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.16); }

/* ───────── Liquid Glass — exact spec from design.md ───────── */
.liquid-glass {
  background: rgba(255, 255, 255, 0.01);
  background-blend-mode: luminosity;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border: none;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
}
.liquid-glass::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.4px;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.45) 0%,
    rgba(255, 255, 255, 0.15) 20%,
    rgba(255, 255, 255, 0) 40%,
    rgba(255, 255, 255, 0) 60%,
    rgba(255, 255, 255, 0.15) 80%,
    rgba(255, 255, 255, 0.45) 100%
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
          mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}

.liquid-glass-strong {
  background: rgba(255, 255, 255, 0.01);
  background-blend-mode: luminosity;
  backdrop-filter: blur(50px);
  -webkit-backdrop-filter: blur(50px);
  border: none;
  box-shadow: 4px 4px 4px rgba(0, 0, 0, 0.05),
    inset 0 1px 1px rgba(255, 255, 255, 0.15);
  position: relative;
  overflow: hidden;
}
.liquid-glass-strong::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.4px;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.5) 0%,
    rgba(255, 255, 255, 0.2) 20%,
    rgba(255, 255, 255, 0) 40%,
    rgba(255, 255, 255, 0) 60%,
    rgba(255, 255, 255, 0.2) 80%,
    rgba(255, 255, 255, 0.5) 100%
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
          mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}

/* Subtle ambient glow used for sections w/o video bg */
.ambient-bg {
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(167, 139, 250, 0.10), transparent 60%),
    radial-gradient(900px 500px at 100% 100%, rgba(249, 115, 22, 0.06), transparent 60%),
    #000;
}

/* Marquee for the partner / tech ribbon */
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.marquee-track { animation: marquee 28s linear infinite; }
.mask-fade {
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 12%, #000 88%, transparent 100%);
          mask-image: linear-gradient(90deg, transparent 0, #000 12%, #000 88%, transparent 100%);
}

/* Floating dot (status pill pulse) */
@keyframes pulseDot { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }
.pulse-dot { animation: pulseDot 1.6s ease-in-out infinite; }

/* ───────── Liquid hover spotlight ─────────
   A mouse-tracked radial highlight that lives inside any glass element. */
.liquid-hover { position: relative; isolation: isolate; }
.liquid-hover::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    180px circle at var(--mx, 50%) var(--my, 50%),
    rgba(255, 255, 255, 0.22),
    rgba(255, 255, 255, 0.06) 35%,
    transparent 60%
  );
  opacity: 0;
  transition: opacity 220ms ease;
  pointer-events: none;
  z-index: 0;
}
.liquid-hover:hover::after { opacity: 1; }
.liquid-hover > * { position: relative; z-index: 1; }

/* Tighter, larger spotlight for prominent CTAs / nav links */
.liquid-hover-tight::after {
  background: radial-gradient(
    90px circle at var(--mx, 50%) var(--my, 50%),
    rgba(255, 255, 255, 0.30),
    rgba(255, 255, 255, 0.08) 40%,
    transparent 70%
  );
}

/* Soft entrance for big section headings */
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
.float-slow { animation: floatY 6s ease-in-out infinite; }

/* Reveal-on-scroll accent line */
.accent-line {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
}

/* Mobile menu animation */
@keyframes menuIn {
  from { opacity: 0; transform: translateY(-8px); filter: blur(8px); }
  to { opacity: 1; transform: translateY(0); filter: blur(0); }
}
.menu-in { animation: menuIn 320ms ease-out both; }

/* ───────── Scroll reveal ─────────
   NOTE: blur is intentionally desktop-only — it's expensive on mobile. */
.reveal { opacity: 0; transform: translateY(20px);
  transition: opacity 600ms cubic-bezier(.2,.7,.2,1),
              transform 600ms cubic-bezier(.2,.7,.2,1); }
.reveal.in-view { opacity: 1; transform: translateY(0); }
@media (min-width: 1024px) and (hover: hover) {
  .reveal { filter: blur(8px);
    transition: opacity 800ms cubic-bezier(.2,.7,.2,1),
                transform 800ms cubic-bezier(.2,.7,.2,1),
                filter 800ms cubic-bezier(.2,.7,.2,1); }
  .reveal.in-view { filter: blur(0); }
}
.reveal-delay-1 { transition-delay: 80ms; }
.reveal-delay-2 { transition-delay: 160ms; }
.reveal-delay-3 { transition-delay: 240ms; }
.reveal-delay-4 { transition-delay: 320ms; }
.reveal-delay-5 { transition-delay: 400ms; }
.reveal-delay-6 { transition-delay: 480ms; }

/* ───────── Animated gradient border (hover) ─────────
   Used for premium project cards. */
.grad-border {
  position: relative;
  isolation: isolate;
}
.grad-border::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: conic-gradient(
    from var(--ang, 0deg),
    rgba(167,139,250,0) 0deg,
    rgba(167,139,250,0.85) 90deg,
    rgba(249,115,22,0.85) 180deg,
    rgba(167,139,250,0.85) 270deg,
    rgba(167,139,250,0) 360deg
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
          mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: 0;
  transition: opacity 350ms ease;
  pointer-events: none;
  z-index: 2;
}
@property --ang { syntax: '<angle>'; initial-value: 0deg; inherits: false; }
@keyframes spinAng { to { --ang: 360deg; } }
.grad-border:hover::after {
  opacity: 1;
  animation: spinAng 4s linear infinite;
}

/* ───────── Shimmer (for Hire-Me CTA) ───────── */
@keyframes shimmer {
  0% { transform: translateX(-120%) skewX(-12deg); }
  100% { transform: translateX(220%) skewX(-12deg); }
}
.shimmer-on-hover { position: relative; overflow: hidden; }
.shimmer-on-hover::before {
  content: "";
  position: absolute;
  top: 0; bottom: 0; width: 40%;
  background: linear-gradient(90deg,
    transparent 0%,
    rgba(255,255,255,0.55) 50%,
    transparent 100%);
  transform: translateX(-120%) skewX(-12deg);
  pointer-events: none;
  opacity: 0;
  transition: opacity 200ms ease;
}
.shimmer-on-hover:hover::before { opacity: 1; animation: shimmer 1.1s ease-out; }

/* ───────── Aurora background (Connect section) ───────── */
@keyframes auroraShift {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(2%, -3%, 0) scale(1.06); }
}
.aurora {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.aurora::before, .aurora::after {
  content: "";
  position: absolute;
  width: 60vw;
  height: 60vw;
  max-width: 900px;
  max-height: 900px;
  border-radius: 9999px;
  filter: blur(80px);
  opacity: 0.45;
  animation: auroraShift 14s ease-in-out infinite;
}
.aurora::before {
  background: radial-gradient(closest-side, rgba(167,139,250,0.55), transparent 70%);
  top: -10%;
  left: -10%;
}
.aurora::after {
  background: radial-gradient(closest-side, rgba(249,115,22,0.40), transparent 70%);
  bottom: -10%;
  right: -10%;
  animation-delay: -7s;
}

/* ───────── Dotted texture for section accents ───────── */
.dot-grid {
  background-image:
    radial-gradient(rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 22px 22px;
}

/* ───────── Tilt-on-hover ───────── */
.tilt {
  transform: perspective(800px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transition: transform 240ms ease;
  will-change: transform;
}

/* ───────── KBD chip styling ───────── */
kbd.kbd {
  font-family: 'Barlow', sans-serif;
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 6px;
  background: rgba(255,255,255,0.08);
  box-shadow: inset 0 -1px 0 rgba(0,0,0,0.25), inset 0 1px 0 rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.85);
}

/* Selection */
::selection { background: rgba(167,139,250,0.35); color: #fff; }

/* Reduce hero typography squeeze on tiny screens */
@media (max-width: 480px) {
  .hero-headline { letter-spacing: -2px !important; }
}

/* Disable heavy hover effects on touch devices */
@media (hover: none) {
  .liquid-hover::after, .grad-border::after { display: none; }
}

/* ───────── Mobile-only refinements ───────── */
/* Make all primary tap targets reach the 44px minimum */
@media (max-width: 640px) {
  .tap-44 { min-height: 44px; }
}

/* Horizontally scrollable rail (e.g., stack tabs) with no scrollbar */
.h-scroll {
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.h-scroll::-webkit-scrollbar { display: none; }
.h-scroll-mask {
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 6%, #000 94%, transparent 100%);
          mask-image: linear-gradient(90deg, transparent 0, #000 6%, #000 94%, transparent 100%);
}

/* Prevent oversized backdrop-filter on low-power phones */
@media (max-width: 480px) {
  .liquid-glass-strong {
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
  }
  .aurora::before, .aurora::after { filter: blur(60px); opacity: 0.35; }
}

/* ─── Mobile-perf overrides ───
   Touch devices and small screens drop the most expensive paint work.
   Hover effects are already disabled on (hover:none); these go further. */
@media (max-width: 1024px) {
  /* Replace blur with a flat translucent panel — visually similar, ~10x cheaper to paint. */
  .liquid-glass {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: rgba(255, 255, 255, 0.04);
  }
  .liquid-glass-strong {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: rgba(255, 255, 255, 0.08);
  }
  /* Aurora is the single largest paint cost — drop it on phones. */
  .aurora { display: none; }
  /* Animated grad-border is paint-heavy and hover-only anyway. */
  .grad-border::after { display: none; }
  /* Marquee duration shorter so it doesn't feel sluggish on smaller screens. */
  .marquee-track { animation-duration: 22s; }
}

/* Skip painting offscreen sections — huge scroll-FPS win on long pages. */
main > section {
  content-visibility: auto;
  contain-intrinsic-size: 1px 900px;
}
/* Hero must stay paintable so the headline doesn't pop on first load. */
main > section#home {
  content-visibility: visible;
}

/* Headlines: tighten letter-spacing further on very narrow phones */
@media (max-width: 380px) {
  .hero-headline { letter-spacing: -1.5px !important; }
}

/* Long URLs / emails should never burst the card */
.break-anywhere { overflow-wrap: anywhere; word-break: break-word; }

/* Make sure the fixed navbar/scroll progress are always interactive
   and never sit beneath sibling sections that use transform/filter. */
.nav-fixed { z-index: 70 !important; pointer-events: auto !important; }
.nav-fixed * { pointer-events: auto; }
.progress-fixed { z-index: 71 !important; pointer-events: none !important; }

/* Visually hidden but accessible to screen readers and crawlers */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}
/* Reveals an sr-only element when keyboard-focused (skip link) */
.focus\:not-sr-only:focus {
  position: fixed;
  width: auto;
  height: auto;
  padding: 0.5rem 1rem;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
  outline: 2px solid rgba(167,139,250,0.8);
  outline-offset: 2px;
}


/* ───────── Blog post body ───────── */
.post-body p { margin: 0 0 1.25em; }
.post-body p:last-child { margin-bottom: 0; }
.post-body h2 {
  font-family: 'Instrument Serif', serif;
  font-style: italic;
  color: #fff;
  font-size: clamp(1.6rem, 3.4vw, 2.25rem);
  letter-spacing: -1px;
  line-height: 1;
  margin: 2.4em 0 0.8em;
}
.post-body h3 {
  color: #fff;
  font-weight: 500;
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
  margin: 1.8em 0 0.6em;
}
.post-body a {
  color: rgba(167,139,250,0.95);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.post-body a:hover { color: #fff; }
.post-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, monospace;
  font-size: 0.88em;
  padding: 1px 6px;
  border-radius: 6px;
  background: rgba(255,255,255,0.08);
  color: #fff;
}
.post-body pre {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  padding: 18px 20px;
  overflow-x: auto;
  margin: 1.5em 0;
  font-size: 13.5px;
  line-height: 1.65;
}
.post-body pre code {
  padding: 0;
  background: transparent;
  color: rgba(255,255,255,0.92);
}
.post-body ul, .post-body ol {
  padding-left: 1.4em;
  margin: 0 0 1.25em;
}
.post-body li { margin: 0.35em 0; }
.post-body blockquote {
  border-left: 2px solid rgba(167,139,250,0.65);
  padding: 0.4em 0 0.4em 1.1em;
  margin: 1.5em 0;
  color: rgba(255,255,255,0.75);
  font-style: italic;
}
.post-body hr {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.18), transparent);
  margin: 2.5em 0;
}
.post-body strong { color: #fff; font-weight: 600; }
.post-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 13.5px;
}
.post-body th, .post-body td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.post-body th { color: #fff; font-weight: 600; }