/* intro.css — the full-screen intro page */

.intro {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  align-items: center;
  padding: max(var(--space-7), env(safe-area-inset-top)) var(--gutter) var(--space-7);
  overflow: hidden;
}
.intro__inner {
  width: 100%;
  max-width: var(--page-max);
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 6rem);
}
.intro__text { will-change: transform, opacity; }
.intro__greeting {
  font-size: var(--fs-lead);
  color: var(--text-2);
  letter-spacing: var(--track-headline);
  margin-bottom: var(--space-2);
}
.intro__name {
  font-size: var(--fs-display);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: var(--track-display);
  margin-bottom: var(--space-5);
}
.intro__tagline {
  font-size: var(--fs-lead);
  line-height: 1.5;
  color: var(--text);
  max-width: 34ch;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-3);
}
.intro__sub {
  font-size: var(--fs-callout);
  color: var(--text-2);
  margin-bottom: var(--space-6);
}
.intro__location {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-callout);
  font-weight: 500;
  color: var(--text-2);
  padding: 8px 14px 8px 12px;
  border-radius: var(--r-pill);
  background: var(--surface);
  box-shadow: 0 0 0 1px var(--line);
}
.intro__location .icon { color: var(--accent); width: 16px; height: 16px; }

/* Portrait: a tall frame the photo fills completely */
.intro__portrait {
  justify-self: end;
  width: min(100%, 440px);
  will-change: transform, opacity;
}
.intro__frame {
  position: relative;
  aspect-ratio: 4 / 5;
  max-height: 76svh;
  margin-left: auto;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--surface-2);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--line);
}
.intro__frame img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transform: scale(var(--photo-zoom, 1)); }   /* zoom: content/profile.js */
.intro__frame::after {           /* soft edge where light catches the frame */
  content: '';
  position: absolute; inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
  pointer-events: none;
}

/* Entrance (runs once, after the photo has loaded) */
.js .intro__frame { opacity: 0; transform: scale(1.06); filter: blur(14px); }
.js .intro__line { opacity: 0; transform: translateY(16px); }
.js .intro.is-ready .intro__frame {
  opacity: 1; transform: none; filter: none;
  transition: opacity 600ms ease, transform 800ms var(--ease-out), filter 600ms ease;
}
.js .intro.is-ready .intro__line {
  opacity: 1; transform: none;
  transition: opacity 450ms ease, transform 600ms var(--ease-out);
}
.js .intro.is-ready .intro__line:nth-child(1) { transition-delay: 120ms; }
.js .intro.is-ready .intro__line:nth-child(2) { transition-delay: 160ms; }
.js .intro.is-ready .intro__line:nth-child(3) { transition-delay: 200ms; }
.js .intro.is-ready .intro__line:nth-child(4) { transition-delay: 240ms; }
.js .intro.is-ready .intro__line:nth-child(5) { transition-delay: 280ms; }
@media (prefers-reduced-motion: reduce) {
  .js .intro__frame, .js .intro__line { transform: none; filter: none; }
}

/* Day / Night toggle */
.theme-toggle {
  position: absolute;
  top: max(var(--space-5), env(safe-area-inset-top));
  right: var(--gutter);
  z-index: 3;
  width: 44px; height: 44px;
  border-radius: 50%;
  display: grid; place-items: center;
  color: var(--text);
  background: var(--glass);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  backdrop-filter: saturate(180%) blur(16px);
  box-shadow: 0 0 0 1px var(--line), var(--shadow-sm);
}
.theme-toggle:hover { color: var(--accent); }
.theme-toggle__icon { grid-area: 1 / 1; display: grid; transition: opacity 220ms ease, transform 400ms var(--ease-out); }
.theme-toggle .icon { width: 20px; height: 20px; }
.theme-toggle__icon--sun { opacity: 0; transform: rotate(-90deg) scale(0.6); }
:root[data-theme="dark"] .theme-toggle__icon--moon { opacity: 0; transform: rotate(90deg) scale(0.6); }
:root[data-theme="dark"] .theme-toggle__icon--sun { opacity: 1; transform: none; }

/* Hover label: says what a click will do (its text is the button's
   aria-label, which js/ui/theme.js keeps current). Set like the skyline's
   axis labels, with a legend swatch of the palette you'd switch to. */
.theme-toggle { --next-bg: var(--night-bg); }
:root[data-theme="dark"] .theme-toggle { --next-bg: var(--day-bg); }
.theme-toggle::after {
  content: attr(aria-label);
  position: absolute;
  right: calc(100% + 10px);
  top: 50%;
  display: flex;
  align-items: center;
  height: 28px;
  padding: 0 11px 0 27px;
  border-radius: var(--r-pill);
  font: 500 10.5px/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--text);
  background:
    radial-gradient(circle at 14px 50%, var(--next-bg) 3.4px, var(--line-strong) 3.9px 4.6px, transparent 5.1px),
    var(--glass-strong);
  box-shadow: 0 0 0 1px var(--line), var(--shadow-sm);
  opacity: 0;
  transform: translate(6px, -50%) scale(0.96);
  transform-origin: right center;   /* grows out of the button */
  transition: opacity 120ms ease, transform 120ms ease;
  pointer-events: none;
}
.theme-toggle:focus-visible::after {
  opacity: 1;
  transform: translate(0, -50%);
  transition: opacity 200ms ease, transform var(--dur-ui) var(--ease-spring);
}
@media (hover: hover) and (pointer: fine) {
  .theme-toggle:hover::after {
    opacity: 1;
    transform: translate(0, -50%);
    transition: opacity 200ms ease 350ms, transform var(--dur-ui) var(--ease-spring) 350ms;   /* a beat, so passing by doesn't flash it */
  }
}
.theme-toggle:active::after { opacity: 0; transition: opacity 80ms ease; }   /* steps aside on press, returns with the new wording */
@media (prefers-reduced-motion: reduce) {
  .theme-toggle::after { transform: translate(0, -50%); }
}
@media (forced-colors: active) {
  .theme-toggle::after { border: 1px solid CanvasText; }
}

/* Scroll hint */
.intro__cue {
  position: absolute;
  left: 50%; bottom: max(var(--space-4), env(safe-area-inset-bottom));
  translate: -50% 0;
  color: var(--text-3);
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 400ms ease, transform 500ms var(--ease-out);
  pointer-events: none;
}
.intro__cue .icon { width: 22px; height: 22px; }
.intro__cue.is-shown { opacity: 1; transform: none; }

/* Phones and narrow tablets: portrait on top, text below, still one screen */
@media (max-width: 819px) {
  .intro { align-items: start; padding-top: max(var(--space-5), env(safe-area-inset-top)); padding-bottom: var(--space-6); }
  .intro__inner { grid-template-columns: 1fr; gap: var(--space-5); }
  .intro__portrait { order: -1; justify-self: stretch; width: 100%; }
  .intro__frame { aspect-ratio: auto; height: clamp(210px, 45svh, 560px); max-height: none; border-radius: var(--r-lg); }
  .intro__name { margin-bottom: var(--space-4); }
  .intro__sub { margin-bottom: var(--space-4); }
  .theme-toggle { top: calc(max(var(--space-5), env(safe-area-inset-top)) + 12px); right: calc(var(--gutter) + 12px); }
}