/* ============================================
   kedarpatel.com — Constellation Design System
   ============================================ */

/* --- Tokens --- */
:root {
  --void: #1A1A18;
  --star: #F5F0E8;
  --signal: #C45D3E;
  --dust: #8A8478;
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
}

/* --- Reset --- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--void);
  color: var(--star);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  cursor: none;
}

::selection {
  background: var(--signal);
  color: var(--star);
}

/* --- Background Texture --- */
.background { position: fixed; inset: 0; z-index: 0; pointer-events: none; }

.background-nebula {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 18% 28%, rgba(196,93,62,0.045) 0%, transparent 60%),
    radial-gradient(ellipse 50% 70% at 82% 72%, rgba(138,132,120,0.035) 0%, transparent 50%),
    radial-gradient(ellipse 100% 40% at 50% 8%, rgba(196,93,62,0.02) 0%, transparent 40%),
    radial-gradient(ellipse 35% 35% at 68% 22%, rgba(80,75,68,0.04) 0%, transparent 50%),
    radial-gradient(ellipse 45% 55% at 35% 80%, rgba(196,93,62,0.02) 0%, transparent 45%);
}

.background-grain {
  position: absolute; inset: 0;
  opacity: 0.35;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 200px 200px;
}

.background-vignette {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 65% 55% at 50% 45%, transparent 25%, rgba(8,8,6,0.55) 100%);
}

/* --- Canvas --- */
canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 1;
}

/* --- Cursor --- */
.cursor-glow {
  position: fixed;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(196,93,62,0.1) 0%, rgba(196,93,62,0.03) 30%, transparent 60%);
  pointer-events: none;
  z-index: 2;
  transform: translate(-50%, -50%);
  mix-blend-mode: screen;
  transition: width 0.3s, height 0.3s;
}

.cursor-dot {
  position: fixed;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--star);
  pointer-events: none;
  z-index: 3;
  transform: translate(-50%, -50%);
  opacity: 0.45;
  transition: opacity 0.2s, width 0.2s, height 0.2s;
}

/* --- UI Layer --- */
.ui-layer { position: fixed; inset: 0; z-index: 4; pointer-events: none; }

/* --- Hero --- */
.hero {
  position: absolute;
  top: 35%; left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: auto;
  opacity: 0;
  animation: none;
}

.hero.fonts-ready {
  animation: hero-in 1.8s ease forwards 0.3s;
}

@keyframes hero-in {
  from { opacity: 0; transform: translate(-50%, -43%); }
  to   { opacity: 1; transform: translate(-50%, -50%); }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 7rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 0.95;
}

.hero h1 .dot { color: var(--signal); }

.hero .descriptor {
  font-size: clamp(0.68rem, 1vw, 0.85rem);
  font-weight: 300;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dust);
  margin-top: 1.1rem;
  opacity: 0;
  animation: descriptor-in 1s ease forwards 2s;
}

@keyframes descriptor-in {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero .whisper {
  font-size: 0.58rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--dust);
  margin-top: 0.6rem;
  opacity: 0;
  transition: opacity 1.2s;
}

/* --- Tooltip --- */
.tooltip {
  position: absolute;
  font-family: var(--font-display);
  font-size: clamp(0.95rem, 1.8vw, 1.25rem);
  line-height: 1.45;
  color: var(--star);
  max-width: 310px;
  pointer-events: none;
  opacity: 0;
  transform: translateY(10px) scale(0.97);
  transition: opacity 0.45s ease, transform 0.45s ease;
  z-index: 10;
  letter-spacing: -0.005em;
  text-shadow: 0 0 30px rgba(26,26,24,0.8);
}

.tooltip.on {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.tooltip em {
  font-style: italic;
  color: var(--signal);
}

/* --- Overlay (expanded node) --- */
.overlay {
  position: fixed; inset: 0;
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s;
  background: rgba(26,26,24,0.9);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.overlay.on {
  opacity: 1;
  pointer-events: auto;
  cursor: none;
}

.overlay-fragment {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.8vw, 2.7rem);
  line-height: 1.3;
  color: var(--star);
  text-align: center;
  max-width: 660px;
  letter-spacing: -0.02em;
  transform: translateY(14px);
  opacity: 0;
  transition: all 0.6s cubic-bezier(0.25,0.46,0.45,0.94) 0.1s;
}

.overlay.on .overlay-fragment {
  transform: translateY(0);
  opacity: 1;
}

.overlay-fragment em {
  font-style: italic;
  color: var(--signal);
}

.overlay-secondary {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 300;
  line-height: 1.7;
  color: var(--dust);
  text-align: center;
  max-width: 480px;
  margin-top: 1.8rem;
  transform: translateY(10px);
  opacity: 0;
  transition: all 0.6s ease 0.4s;
}

.overlay.on .overlay-secondary {
  transform: translateY(0);
  opacity: 1;
  color: rgba(245,240,232,0.5);
}

.overlay-close {
  position: absolute;
  top: 2rem; right: 2rem;
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dust);
  background: none;
  border: 1px solid rgba(138,132,120,0.2);
  padding: 0.4rem 0.9rem;
  border-radius: 100px;
  cursor: none;
  transition: all 0.3s;
}

.overlay-close:hover {
  color: var(--star);
  border-color: rgba(245,240,232,0.25);
}

.overlay-hint {
  font-size: 0.6rem;
  font-weight: 300;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dust);
  margin-top: 2.5rem;
  opacity: 0;
  transition: opacity 0.6s ease 0.8s;
}

.overlay.on .overlay-hint { opacity: 0.35; }

/* --- Contact Zone --- */
.contact {
  position: absolute;
  bottom: 0; left: 0;
  width: 100%;
  text-align: center;
  padding-bottom: 3rem;
  z-index: 6;
  pointer-events: none;
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.8s, transform 0.8s;
}

.contact.on {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.contact-invitation {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.8vw, 2.1rem);
  margin-bottom: 1.6rem;
  letter-spacing: -0.01em;
}

.contact-invitation .dot { color: var(--signal); }

.contact-links {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  margin-bottom: 1.6rem;
}

.contact-links a {
  font-size: 0.83rem;
  font-weight: 400;
  letter-spacing: 0.03em;
  color: var(--star);
  text-decoration: none;
  position: relative;
  pointer-events: auto;
  cursor: none;
  transition: color 0.3s;
}

.contact-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 100%; height: 1px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}

.contact-links a:hover { color: var(--signal); }
.contact-links a:hover::after { transform: scaleX(1); }

.contact-location {
  font-size: 0.66rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dust);
  opacity: 0.5;
}

.lab-link {
  display: inline-block;
  margin-top: 2rem;
  font-size: 0.66rem;
  font-weight: 300;
  letter-spacing: 0.14em;
  color: var(--dust);
  text-decoration: none;
  opacity: 0.3;
  transition: opacity 0.5s, color 0.5s;
  cursor: none;
  pointer-events: auto;
}

.lab-link:hover {
  opacity: 0.55;
  color: var(--star);
}

/* --- Scroll Hint --- */
.scroll-hint {
  position: fixed;
  bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  z-index: 6;
  opacity: 0;
  animation: scroll-hint-in 0.8s ease forwards 3.5s;
  transition: opacity 0.5s;
}

.scroll-hint.off { opacity: 0 !important; pointer-events: none; }

@keyframes scroll-hint-in { to { opacity: 1; } }

.scroll-hint span {
  display: block;
  width: 1px; height: 34px;
  background: var(--dust);
  margin: 0 auto;
  animation: scroll-bob 2.2s ease-in-out infinite;
}

.scroll-hint-text {
  font-size: 0.55rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dust);
  margin-top: 0.6rem;
  opacity: 0.4;
  text-align: center;
}

@keyframes scroll-bob {
  0%, 100% { opacity: 0.15; }
  50% { opacity: 0.5; }
}

/* --- Easter Egg Pill --- */
.easter-egg-pill {
  position: fixed;
  bottom: 2rem; right: 2rem;
  z-index: 6;
  font-family: var(--font-body);
  font-size: 0.55rem;
  font-weight: 300;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dust);
  background: rgba(138,132,120,0.06);
  border: 1px solid rgba(138,132,120,0.12);
  padding: 0.35rem 0.8rem;
  border-radius: 100px;
  opacity: 0;
  transition: opacity 1.5s;
  pointer-events: none;
}

.easter-egg-pill.on { opacity: 0.5; }

.easter-egg-pill kbd {
  font-family: var(--font-body);
  font-size: 0.55rem;
  background: rgba(245,240,232,0.06);
  border: 1px solid rgba(245,240,232,0.1);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  margin-left: 0.2rem;
  color: var(--star);
  font-weight: 400;
}

/* --- Tap Hint (mobile onboarding) --- */
.tap-hint {
  display: none;
  position: fixed;
  top: 62%;
  left: 50%;
  transform: translateX(-50%);
  z-index: 6;
  font-family: var(--font-body);
  font-size: 0.55rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dust);
  opacity: 0;
  transition: opacity 1.2s;
  pointer-events: none;
}

.tap-hint.on { opacity: 0.45; }

@media (hover: none) and (pointer: coarse) {
  .tap-hint { display: block; }
}

/* --- Touch devices (no hover/fine pointer) --- */
@media (hover: none) and (pointer: coarse) {
  html, body { cursor: auto; }
  .cursor-glow, .cursor-dot { display: none; }
  .contact-links a, .overlay-close { cursor: pointer; }
}

/* --- Mobile tooltip (centered below viewport middle) --- */
.tooltip.mobile-focused {
  position: fixed;
  left: 50% !important;
  top: auto !important;
  bottom: 15%;
  transform: translateX(-50%) translateY(0) scale(1) !important;
  max-width: 85vw;
  text-align: center;
  background: rgba(26,26,24,0.85);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  padding: 1rem 1.4rem;
  border-radius: 12px;
  border: 1px solid rgba(138,132,120,0.1);
}

.tooltip.mobile-focused.on {
  opacity: 1;
  transform: translateX(-50%) translateY(0) scale(1) !important;
}

/* Tap hint below mobile tooltip */
.tooltip-tap-hint {
  display: none;
  font-family: var(--font-body);
  font-size: 0.52rem;
  font-weight: 300;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dust);
  margin-top: 0.6rem;
  opacity: 0.4;
}

.tooltip.mobile-focused .tooltip-tap-hint { display: block; }

/* Shake hint for mobile easter egg */
.shake-hint {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 6;
  font-family: var(--font-body);
  font-size: 0.52rem;
  font-weight: 300;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dust);
  opacity: 0;
  transition: opacity 1.5s;
  pointer-events: none;
}

.shake-hint.on { opacity: 0.4; }

/* --- Mobile (small screens) --- */
@media (max-width: 768px) {
  .hero h1 { font-size: clamp(2.2rem, 11vw, 3.6rem); }
  .contact-links { flex-direction: column; gap: 1rem; }
  .easter-egg-pill { display: none; }
}

/* --- Tablet --- */
@media (min-width: 769px) and (max-width: 1024px) {
  .hero h1 { font-size: clamp(2.8rem, 6vw, 5rem); }
}

/* --- Tablet with trackpad/pencil — restore desktop cursor --- */
@media (min-width: 769px) and (hover: hover) and (pointer: fine) {
  html, body { cursor: none; }
  .cursor-glow, .cursor-dot { display: block; }
}

/* --- Mobile landscape --- */
@media (orientation: landscape) and (max-height: 500px) {
  .hero h1 { font-size: clamp(1.8rem, 6vw, 2.8rem); }
  .hero .descriptor { margin-top: 0.6rem; }
  .contact { padding-bottom: 1.5rem; }
}

/* --- Screen Reader Only --- */
.sr-only { position: absolute; left: -9999px; }

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}