/* =========================================================
   Nir — provizor.co.il
   Minimal black & white personal site
   ========================================================= */

:root {
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --speed: 0.6s;
}

/* Night (default) */
[data-theme="night"] {
  --bg: #070707;
  --bg-2: #101010;
  --fg: #f7f7f7;
  --muted: #6b6b6b;
  --line: rgba(247, 247, 247, 0.14);
  --dot: 247, 247, 247;        /* particle colour (rgb channels) */
  --accent-day: #6b6b6b;       /* dimmed half of tagline */
  --accent-night: #ffffff;     /* lit half of tagline */
  --grain-opacity: 0.05;
}

/* Day */
[data-theme="day"] {
  --bg: #f6f6f4;
  --bg-2: #ffffff;
  --fg: #0a0a0a;
  --muted: #9a9a9a;
  --line: rgba(10, 10, 10, 0.12);
  --dot: 10, 10, 10;
  --accent-day: #0a0a0a;
  --accent-night: #b3b3b3;
  --grain-opacity: 0.04;
}

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

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

body {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--bg);
  color: var(--fg);
  font-family: "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  cursor: crosshair;        /* hints the dot field is playable anywhere */
  overflow: hidden;
  position: relative;
  transition: background var(--speed) var(--ease), color var(--speed) var(--ease);
}

/* ---------- Background canvas ---------- */
#bg {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
}

/* ---------- Film grain ---------- */
.grain {
  position: fixed;
  inset: -50%;
  z-index: 1;
  pointer-events: none;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 8s steps(6) infinite;
}

@keyframes grain {
  0%, 100% { transform: translate(0, 0); }
  20% { transform: translate(-8%, 4%); }
  40% { transform: translate(6%, -6%); }
  60% { transform: translate(-4%, 8%); }
  80% { transform: translate(8%, 2%); }
}

/* ---------- Theme toggle ---------- */
.theme-toggle {
  position: fixed;
  top: clamp(1.2rem, 4vw, 2.2rem);
  right: clamp(1.2rem, 4vw, 2.2rem);
  z-index: 5;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  color: var(--fg);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.4s var(--ease), border-color var(--speed) var(--ease), background 0.4s var(--ease);
}
.theme-toggle:hover { transform: rotate(25deg) scale(1.06); background: var(--bg-2); }
.theme-toggle:active { transform: scale(0.94); }
.theme-toggle .icon { transition: transform 0.5s var(--ease); }

/* Show moon at night, sun by day */
.theme-toggle .sun { opacity: 0; transform-origin: center; transform: scale(0.4) rotate(-90deg); transition: opacity 0.4s var(--ease), transform 0.5s var(--ease); }
.theme-toggle .moon { opacity: 1; transition: opacity 0.4s var(--ease); }
[data-theme="day"] .theme-toggle .sun { opacity: 1; transform: scale(1) rotate(0); }
[data-theme="day"] .theme-toggle .moon { opacity: 0; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 2rem 1.5rem;
}

/* The particle name lives on a full-viewport canvas (so flung dots roam the
   whole screen); the word itself is drawn small in the bottom-left corner.
   Its entrance is the dot rain in script.js — no CSS fade needed. */
#name-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  display: block;
  pointer-events: none;     /* physics tracked via window pointer events */
}

/* Visually hidden, still read by screen readers */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.tagline {
  font-size: clamp(0.85rem, 3vw, 1.2rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-bottom: 0;
}
.tagline .part { transition: color var(--speed) var(--ease), opacity var(--speed) var(--ease); }
.tagline .day { color: var(--accent-day); }
.tagline .night { color: var(--accent-night); }
.tagline .arrow {
  margin: 0 0.5em;
  color: var(--muted);
  font-weight: 400;
  transition: color var(--speed) var(--ease);
}

/* Blinking terminal caret */
.caret {
  display: inline-block;
  width: 0.58em;
  height: 1.05em;
  margin-left: 0.12em;
  transform: translateY(0.15em);
  background: var(--accent-night);
  animation: blink 1.1s steps(1) infinite;
  transition: background var(--speed) var(--ease);
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- Email (in the footer corner) ---------- */
.mail {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  color: var(--fg);            /* brighter than the muted label -> reads as the CTA */
  text-transform: none;        /* keep the address lowercase */
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color var(--speed) var(--ease);
}
.mail svg { width: 1em; height: 1em; transition: transform 0.35s var(--ease); }
.mail::after {
  content: "";
  position: absolute;
  left: 0; bottom: -3px;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.45s var(--ease);
}
.mail:hover::after { transform: scaleX(1); transform-origin: left; }
.mail:hover svg { transform: translate(2px, -2px); }

/* ---------- Footer ---------- */
.footer {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1rem;
  padding: clamp(1.1rem, 4vw, 1.8rem) clamp(1.3rem, 5vw, 2.4rem);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: clamp(0.62rem, 2.2vw, 0.74rem);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color var(--speed) var(--ease);
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(1.1em);
  animation: rise 0.9s var(--ease) forwards;
  animation-delay: calc(var(--d, 0) * 90ms + 150ms);
}
@keyframes rise {
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .reveal { animation: none; opacity: 1; transform: none; }
  .grain { animation: none; }
  .caret { animation: none; }
  * { transition-duration: 0.001ms !important; }
}