/* ---- fonts ---- */
@font-face {
  font-family: "Aeonik";
  src: url("fonts/Aeonik-Medium.woff2") format("woff2"),
       url("fonts/Aeonik-Medium.woff") format("woff");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Aeonik Mono";
  src: url("fonts/AeonikMono-Regular.woff2") format("woff2"),
       url("fonts/AeonikMono-Regular.woff") format("woff");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --paper: #FBFAF7;
  --ink: #1A1916;
  --ink-soft: #6F6B63;
  --line: #E5E2DB;
  --saffron: #E8A33D;
  --yellow: #FDF578;
  --nav-h: 40px;
  --sans: "Aeonik", -apple-system, system-ui, "Segoe UI", Roboto, sans-serif;
  --mono: "Aeonik Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* index-page gradient: FDF578 → transparent across the lower quarter,
   sitting behind the cards. Hidden on the tool view. */
body::after {
  content: "";
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: 25vh;
  background: linear-gradient(to top, var(--yellow), rgba(253, 245, 120, 0));
  pointer-events: none;
  z-index: 0;
}
body.is-tool::after { display: none; }

/* ---- layout ---- */
.wrap {
  position: relative;
  z-index: 1;
  max-width: 960px;
  margin: 0 auto;
  padding: clamp(24px, 6vw, 72px) clamp(20px, 5vw, 40px);
}

.eyebrow {
  display: flex;
  align-items: center;
  height: 25px;              /* match the session-head row so titles align */
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #000;
  margin: 0 0 28px;
}

.title {
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 600;
  margin: 0 0 40px;
}

.backlink {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: #000;
  display: inline-block;
  margin: 0 0 28px;
  text-transform: uppercase;
  transition: color 200ms cubic-bezier(0.33, 1, 0.68, 1);
}
.backlink:hover { color: var(--saffron); }

/* session page: backlink + session tag on one row */
.session-head {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 25px;              /* match the landing eyebrow row */
  margin: 0 0 28px;
}
.session-head .backlink { margin: 0; }

/* WORK pills: inverted — black fill, yellow text */
.session-tag.is-work,
.card .code.is-work { background: #1D1D1B; color: var(--yellow); }
.session-tag {
  display: inline-flex;
  align-items: center;
  height: 25px;
  margin-left: 12px;         /* nudge the tag right */
  padding: 0 11px;
  border-radius: 999px;
  background: var(--yellow);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #000;
}

/* ---- grids + cards ---- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: none;
  border-radius: 20px;
  padding: 22px 20px;
  background: #fff;
  aspect-ratio: 1;
  overflow: hidden;
  /* promote to its own layer so the rounded clip is AA'd cleanly
     (kills the dark hairline at the corners) */
  transform: translateZ(0);
  -webkit-mask-image: -webkit-radial-gradient(white, black);
  /* gentle staggered entrance, top-left → bottom-right */
  animation: tile-in 820ms cubic-bezier(0.22, 1, 0.36, 1) backwards;
  animation-delay: calc(var(--i, 0) * 90ms);
}

@keyframes tile-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateZ(0); }
}

/* hover: dissolve the whole tile to solid FDF578 (crossfade, no movement) */
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: inherit;
  background: var(--yellow);
  opacity: 0;
  /* return to default: quick 200ms ease-out */
  transition: opacity 200ms cubic-bezier(0.33, 1, 0.68, 1);
  pointer-events: none;
}
.card:hover::before {
  opacity: 1;
  /* hover-in: ease-out over 500ms (fast start, easing to a stop) */
  transition: opacity 500ms cubic-bezier(0.5, 1, 0.89, 1);
}

/* keyboard focus ring kept for accessibility */
.card:focus-visible { outline: 2px solid var(--saffron); outline-offset: 2px; }

/* optional cover image: fills the card, with an FDF578 75% wash on top so
   the type always reads. */
.card .cover {
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  background-size: cover;
  background-position: center;
  /* no return transition: on unhover the scale resets instantly (hidden
     behind the still-opaque yellow), so the tile just dissolves back */
}
.card:hover .cover {
  transform: scale(1.07);
  /* hover-in: ease-out over 500ms (fast start, easing to a stop) */
  transition: transform 500ms cubic-bezier(0.5, 1, 0.89, 1);
}

/* light-grey (ECECEB) wash on cover tiles: 100% at the bottom,
   fading to 0% at 3/4 of the tile height */
.card::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(to top,
    rgba(236, 236, 235, 1) 0%,
    rgba(236, 236, 235, 1) 5%,
    rgba(236, 236, 235, 0) 100%);
}

/* tiles without a cover: fill the whole tile with the grey */
.card:not(:has(.cover)) { background: #ECECEB; }

/* session tiles: on hover, run a randomised cover slideshow with a slow
   continuous zoom instead of the yellow fill. */
.session-covers {
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  overflow: hidden;
  opacity: 0;
  transform: scale(1);
  pointer-events: none;
  transition: opacity 200ms cubic-bezier(0.5, 1, 0.89, 1);
}
/* opacity fades via :hover; the zoom is driven in JS (Web Animations API)
   so it can ease cleanly back from its current scale on hover-out */
.session-card:hover .session-covers { opacity: 1; }
.session-covers .frame {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  /* steady linear crossfade; only the incoming frame fades in, base stays opaque */
  transition: opacity 140ms linear;
}
.session-covers .frame:first-child  { z-index: 0; } /* base, always opaque */
.session-covers .frame:last-child   { z-index: 1; } /* overlay, fades in */

/* session tiles show covers on hover, not the yellow fill */
.session-card:hover::before { opacity: 0; }

/* keep card text above the cover, gradient and hover fill */
.card .code,
.card .name,
.card .meta,
.card .foot {
  position: relative;
  z-index: 3;
}

.card .code {
  position: absolute;           /* pin to the tile corner */
  top: 14px;
  left: 14px;
  display: inline-flex;
  align-items: center;
  height: 25px;
  padding: 0 11px;
  border-radius: 999px;         /* fully rounded pill */
  background: var(--yellow);
  font-family: var(--mono);
  font-size: 12px;
  color: #000;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.card .name {
  /* 1.5× the previous 18px */
  font-size: 27px;
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
}

.card .meta {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: #000;
  text-transform: uppercase;
}

/* tool-card footer: name + byline pinned to the bottom */
.card .foot { margin-top: auto; }

.card .byline { line-height: 1.2; }

.card .byline .by {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: #000;
  text-transform: uppercase;
}

.card .byline .who {
  font-family: var(--sans);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
}

/* ---- tool view ---- */
.toolview { position: relative; display: flex; flex-direction: column; height: 100vh; }

.toolbar {
  position: relative;
  z-index: 2;
  height: var(--nav-h);
  flex: 0 0 var(--nav-h);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 14px;
  background: var(--yellow);
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.2);
}

.toolbar .back {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: #000;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  position: relative;
  z-index: 1;
  text-transform: uppercase;
  transition: color 200ms cubic-bezier(0.33, 1, 0.68, 1);
}
.toolbar .back:hover { color: var(--saffron); }

/* tool + name: non-mono, centred in the panel */
.toolbar .label {
  font-family: var(--sans);
  font-size: 24px;
  font-weight: 600;
  color: var(--ink);
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  max-width: 60%;
  text-align: center;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

/* small mono "by", sitting on the baseline of the name/author */
.toolbar .label .by {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #000;
  vertical-align: baseline;
}

.toolview iframe { flex: 1 1 auto; width: 100%; border: 0; background: #fff; }

/* toolbar "Copy code" toggle (right side) */
.copy-code {
  margin-left: auto;
  position: relative;
  z-index: 1;
  height: 28px;
  padding: 0 14px;
  border: 1px solid rgba(0, 0, 0, 0.7);
  border-radius: 999px;
  background: transparent;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #000;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 200ms cubic-bezier(0.33, 1, 0.68, 1),
              border-color 200ms cubic-bezier(0.33, 1, 0.68, 1),
              color 200ms cubic-bezier(0.33, 1, 0.68, 1);
}
.copy-code:hover { background: #1D1D1B; border-color: #1D1D1B; color: var(--yellow); }
.copy-code .cc-label { display: inline-block; }

/* code panel: modal over the running tool, below the toolbar */
.code-panel {
  position: absolute;
  left: 0;
  right: 0;
  top: var(--nav-h);
  bottom: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(24px, 5vw, 56px);
  overflow: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 220ms cubic-bezier(0.33, 1, 0.68, 1),
              transform 220ms cubic-bezier(0.33, 1, 0.68, 1),
              visibility 0s linear 220ms;
}
.code-panel.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition: opacity 220ms cubic-bezier(0.33, 1, 0.68, 1),
              transform 220ms cubic-bezier(0.33, 1, 0.68, 1);
}
.code-veil {
  position: absolute;
  inset: 0;
  background: rgba(251, 250, 247, 0.9);
}
.code-panel .ai-card { position: relative; z-index: 1; }

/* ---- AI gate (tool needs an API we don't run here) ---- */
/* the tool still loads as a faint, non-interactive backdrop */
.ai-stage {
  position: relative;
  flex: 1 1 auto;
  display: flex;
  overflow: hidden;
}
.ai-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  background: #fff;
  pointer-events: none;   /* non-interactive */
}
.ai-veil {
  position: absolute;
  inset: 0;
  background: rgba(251, 250, 247, 0.9);  /* 90% paper */
  pointer-events: none;
}
.ai-gate {
  position: relative;
  z-index: 1;
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(24px, 5vw, 56px);
  overflow: auto;
}
.ai-card {
  width: 100%;
  max-width: 560px;
  display: flex;
  flex-direction: column;
}
.ai-eyebrow {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  height: 25px;
  padding: 0 11px;
  border-radius: 999px;
  background: var(--yellow);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #000;
  margin: 0 0 18px;
}
.ai-title {
  font-family: var(--sans);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 10px;
}
.ai-text {
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.45;
  color: var(--ink-soft);
  margin: 0 0 18px;
}
.ai-prompt,
.code-text {
  width: 100%;
  height: 180px;
  resize: vertical;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink);
  white-space: pre;
  overflow: auto;
}
.ai-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
}
.ai-copy,
.code-copy,
.ai-open {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 20px;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  cursor: pointer;
  transition: filter 200ms cubic-bezier(0.33, 1, 0.68, 1),
              background-color 200ms cubic-bezier(0.33, 1, 0.68, 1);
}
.ai-copy,
.code-copy {
  border: none;
  background: var(--yellow);
  color: #000;
}
.ai-copy:hover,
.code-copy:hover { filter: brightness(0.94); }
.ai-open {
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
}
.ai-open:hover { background: var(--ink); color: var(--paper); }

/* ---- empty + motion ---- */
.empty {
  position: relative;
  z-index: 1;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: #000;
  border: 1px dashed var(--line);
  border-radius: 10px;
  padding: 32px;
  text-align: center;
  text-transform: uppercase;
}

@media (prefers-reduced-motion: reduce) {
  .card::before { transition: none; }
  .card .cover { transition: none; }
  .card:hover .cover { transform: none; }
  .card { animation: none; }
}