/* ═══════════════════════════════════════════════════
   Footer — "Fin." Closing Chapter
   Portfolio v3 · 2026
   Theme-inverted, signature stroke-draw via JS
   ═══════════════════════════════════════════════════ */

.footer {
  background:
    radial-gradient(ellipse 90% 40% at 50% 0%, oklch(62% 0.18 35 / 0.12), transparent 65%),
    radial-gradient(ellipse 70% 30% at 50% 100%, oklch(62% 0.18 35 / 0.08), transparent 65%),
    var(--surface-footer);
  padding-bottom: clamp(3rem, 6vh, 5rem);
  position: relative;
  overflow: hidden;
}

/* Top rust seam */
.footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    oklch(62% 0.18 35 / 0.55) 25%,
    oklch(62% 0.18 35 / 0.55) 75%,
    transparent 100%);
  z-index: 25;
  pointer-events: none;
}

/* ═══ Page cover — slides up via JS ═══ */
.footer__cover {
  position: absolute;
  inset: 0;
  background: var(--surface-base);
  z-index: 20;
  pointer-events: none;
  transform-origin: bottom center;
  /* No transition — JS drives this directly via scroll position */
  transform: translateY(0);
  will-change: transform;
}

/* ═══ Now — where I'm pointed (pre-"Fin.") ═══ */
.footer__now {
  position: relative;
  z-index: 2;
  max-width: 640px;
  margin: 0 auto;
  padding: clamp(5rem, 10vh, 8rem) clamp(1.5rem, 5vw, 3rem) clamp(2rem, 4vh, 3rem);
  text-align: left;
}

.footer__now-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 1.5rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid oklch(15% 0.03 55 / 0.15);
}

.footer__now-text {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  line-height: 1.6;
  color: var(--ink-body);
  margin: 0 0 1.1rem;
  letter-spacing: 0;
}

.footer__now-coda {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1rem, 1.35vw, 1.15rem);
  line-height: 1.55;
  color: var(--ink-muted);
  margin: 0;
  max-width: 55ch;
}

/* ═══ Closing chapter — "Fin." ═══ */
.footer__chapter {
  position: relative;
  z-index: 1;
  height: 40vh;
  min-height: 260px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  pointer-events: none;
}

.footer__chapter::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse 55% 45% at 50% 50%,
    oklch(62% 0.18 35 / 0.08),
    transparent 70%
  );
  pointer-events: none;
}

.footer__chapter-word {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(4rem, 14vw, 10rem);
  font-weight: 400;
  letter-spacing: -0.055em;
  color: var(--ink-primary);
  line-height: 0.88;
  display: block;
  text-align: center;
}

/* ═══ The letter ═══ */
.footer__letter {
  max-width: 640px;
  margin: clamp(1rem, 3vh, 2.5rem) auto 0;
  padding: 0 clamp(1.5rem, 5vw, 3rem);
  position: relative;
  z-index: 2;
}

/* ═══ Author portrait — editorial book-flap treatment, static elevation (no hover) ═══ */
.footer__portrait {
  margin: 0 1.25rem 0.4rem 0.2rem;
  float: left;
  shape-outside: circle(50%);
  width: 108px;
  height: 108px;
  overflow: hidden;
  border-radius: 50%;
  position: relative;
  /* Three-layer shadow — pop out off the cream footer surface */
  box-shadow:
    0 20px 44px oklch(15% 0.03 55 / 0.26),
    0 9px 18px oklch(15% 0.03 55 / 0.16),
    0 2px 4px oklch(15% 0.03 55 / 0.12);
}

/* Soft highlight at top-left — reads as light falling on a 3D object */
.footer__portrait::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(
    circle at 30% 25%,
    oklch(100% 0 0 / 0.16) 0%,
    transparent 50%
  );
}

.footer__portrait img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1);
  opacity: 0.96;
}

.footer__prose {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 1.8vw, 1.45rem);
  line-height: 1.58;
  color: var(--ink-body);
  margin: 0;
  text-align: left;
  letter-spacing: 0;
}

.footer__writeme {
  color: var(--accent);
  font-style: italic;
  text-decoration: none;
  white-space: nowrap;
  background-image: linear-gradient(90deg, var(--accent), var(--accent));
  background-size: 100% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  padding-bottom: 0.1em;
  transition: color 0.3s ease, background-size 0.4s ease;
}

.footer__writeme:hover,
.footer__writeme:focus-visible {
  color: var(--palette-rust-deep);
  background-size: 100% 2px;
}

/* ═══ Signature — stroke draw via JS ═══ */
.footer__signature {
  margin: clamp(2rem, 4vh, 3rem) 0 0.8rem;
  color: var(--accent);
  line-height: 0;
}

.footer__signature-svg {
  display: block;
  width: clamp(150px, 22vw, 220px);
  height: auto;
  overflow: visible;
  filter: drop-shadow(0 1px 2px oklch(15% 0.03 55 / 0.15))
          drop-shadow(0 0 18px oklch(62% 0.18 35 / 0.3));
}

.footer__sig-stroke {
  fill: none;
  stroke: currentColor;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Period dot — starts hidden, JS reveals */
.footer__sig-dot {
  opacity: 0;
  transform-origin: 208px 96px;
  transform: scale(0);
  transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.footer__sig-dot.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* ── Date ── */
.footer__date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin: 1.5rem 0 0;
}

/* Copyright — very end of the page */
.footer__copyright {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
  text-align: center;
  padding: 1.5rem var(--space-page) 2rem;
  opacity: 0.5;
}

/* ═══ Seal — hairline rule, draws via JS ═══ */
.footer__seal {
  max-width: 640px;
  margin: clamp(3rem, 6vh, 4.5rem) auto clamp(1.5rem, 3vh, 2.5rem);
  padding: 0 clamp(1.5rem, 5vw, 3rem);
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    oklch(62% 0.18 35 / 0.55) 25%,
    oklch(62% 0.18 35 / 0.55) 75%,
    transparent 100%
  );
  transform-origin: center center;
  transform: scaleX(0);
  transition: transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.footer__seal.is-visible {
  transform: scaleX(1);
}

/* ═══ Thesis words — four keywords below the seal, earned by reading ═══ */
.footer__thesis {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: oklch(35% 0.03 55 / 0.65);
  text-align: center;
  margin: 0 auto clamp(1.5rem, 3vh, 2.5rem);
  opacity: 0;
  transition: opacity 1.2s ease 0.6s;
}

.footer__thesis.is-visible {
  opacity: 1;
}

/* Dark mode — footer flips, use a light colour */
:root:not([data-theme="light"]) .footer__thesis {
  color: oklch(85% 0.02 85 / 0.55);
}

/* ═══ Portrait — intro position inside Now section ═══ */
.footer__portrait--intro {
  display: flex;
  justify-content: center;
  margin: 0 auto 1.5rem;
}

.footer__portrait--intro img {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  filter: grayscale(18%);
  opacity: 0.88;
  display: block;
}

/* ═══ Coordinates ═══ */
.footer__coords {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 5vw, 3rem);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.1rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  text-transform: lowercase;
  font-weight: 500;
  color: var(--ink-body);
}

/* Coords fade in after signature */
.footer__coords {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.footer__coords.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.footer__date-sep { color: var(--ink-faint); user-select: none; }

.footer__coord-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--ink-muted);
  text-decoration: none;
  border-radius: 50%;
  transition: color 0.3s ease, background 0.3s ease, transform 0.3s ease;
}

.footer__coord-link:hover,
.footer__coord-link:focus-visible {
  color: var(--accent);
  background: oklch(62% 0.18 35 / 0.08);
  transform: translateY(-1px);
}

.footer__coord-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  transition: opacity 0.3s ease;
}

/* URL tooltip on hover */
.footer__coord-link::after {
  content: attr(data-url);
  position: absolute;
  bottom: calc(100% + 0.4rem);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  white-space: nowrap;
  color: var(--ink-body);
  background: var(--surface-footer);
  padding: 0.3rem 0.55rem;
  border: 1px solid oklch(15% 0.03 55 / 0.1);
  border-radius: 4px;
  box-shadow: 0 4px 12px oklch(15% 0.03 55 / 0.12);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 2;
}

.footer__coord-link:hover::after,
.footer__coord-link:focus-visible::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ═══ Colophon — a quiet editorial invite to the receipt at /health ═══ */
.footer__colophon {
  position: relative;
  z-index: 21;                 /* above the peel cover (z-index: 20) */
  max-width: 620px;
  margin: clamp(2.5rem, 5vh, 3.5rem) auto 0;
  padding: clamp(1.75rem, 3.5vh, 2.5rem) clamp(1.5rem, 4vw, 2.5rem) 0;
  border-top: 1px solid color-mix(in oklch, var(--ink-body) 12%, transparent);
  text-align: center;
}

/* Eyebrow label — small mono chapter mark */
.footer__colophon-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: clamp(1rem, 2vh, 1.4rem);
}

/* The invite link — editorial italic with mono path + arrow */
.footer__colophon-invite {
  display: inline-flex;
  align-items: baseline;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 0.65rem;
  padding: 0.3rem 0;
  color: var(--ink-primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer__colophon-phrase {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.25rem, 2.2vw, 1.7rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  border-bottom: 1px solid color-mix(in oklch, var(--ink-body) 22%, transparent);
  padding-bottom: 3px;
  transition: border-bottom-color 0.3s ease;
}

.footer__colophon-path {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-muted);
  padding: 0.2rem 0.55rem;
  border: 1px solid color-mix(in oklch, var(--ink-body) 16%, transparent);
  border-radius: 3px;
  transition: color 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.footer__colophon-arrow {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  color: var(--ink-muted);
  display: inline-block;
  transition: transform 0.35s var(--ease-out), color 0.3s ease;
  will-change: transform;
}

.footer__colophon-invite:hover,
.footer__colophon-invite:focus-visible {
  color: var(--accent);
}

.footer__colophon-invite:hover .footer__colophon-phrase,
.footer__colophon-invite:focus-visible .footer__colophon-phrase {
  border-bottom-color: var(--accent);
}

.footer__colophon-invite:hover .footer__colophon-path,
.footer__colophon-invite:focus-visible .footer__colophon-path {
  color: var(--accent);
  border-color: color-mix(in oklch, var(--accent) 50%, transparent);
  background: color-mix(in oklch, var(--accent) 6%, transparent);
}

.footer__colophon-invite:hover .footer__colophon-arrow,
.footer__colophon-invite:focus-visible .footer__colophon-arrow {
  transform: translateX(6px);
  color: var(--accent);
}

/* ═══ Responsive ═══ */
@media (max-width: 480px) {
  .footer__colophon {
    padding-top: 1.75rem;
  }
  .footer__colophon-phrase {
    font-size: clamp(1.1rem, 4.5vw, 1.35rem);
  }
  .footer__colophon-path {
    font-size: 0.6rem;
    letter-spacing: 0.18em;
  }
}

/* Touch devices: tap reveals tooltip instead of immediate hover */
@media (hover: none) and (pointer: coarse) {
  .footer__coord-link::after {
    transition: opacity 0.2s ease;
  }
  .footer__coord-link:active::after {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
  /* Slight gap between icons so tooltip has room */
  .footer__coords {
    gap: 1rem;
  }
}

/* ═══ Responsive ═══ */
@media (max-width: 768px) {
  .footer__chapter {
    height: 32vh;
    min-height: 220px;
  }
  .footer__chapter-word {
    font-size: clamp(4rem, 25vw, 9rem);
  }
  .footer__prose {
    font-size: clamp(1.05rem, 4.2vw, 1.3rem);
  }
  .footer__portrait {
    width: 92px;
    height: 92px;
    margin: 0 1rem 0.3rem 0;
  }
  .footer__signature-svg {
    width: clamp(110px, 35vw, 180px);
  }
}

@media (max-width: 480px) {
  .footer {
    padding-bottom: 2rem;
  }
  .footer__chapter {
    height: 28vh;
    min-height: 180px;
  }
  .footer__chapter-word {
    font-size: clamp(3rem, 22vw, 6rem);
  }
  .footer__prose {
    font-size: 1rem;
  }
  .footer__letter {
    padding: 0 1.25rem;
  }
  .footer__portrait {
    float: none;
    shape-outside: none;
    width: 84px;
    height: 84px;
    margin: 0 0 1rem 0;
  }
  .footer__signature-svg {
    width: clamp(90px, 30vw, 140px);
  }
  .footer__seal {
    padding: 0 1.25rem;
  }
  .footer__coords {
    padding: 0 1.25rem;
    font-size: 0.68rem;
    gap: 0.75rem;
  }
}

/* ═══ Reduced motion ═══ */
@media (prefers-reduced-motion: reduce) {
  .footer__cover { display: none; }
  .footer__sig-stroke {
    stroke-dasharray: none !important;
    stroke-dashoffset: 0 !important;
  }
  .footer__sig-dot {
    opacity: 1;
    transform: scale(1);
  }
  .footer__seal {
    transform: scaleX(1);
  }
}