/*
  Continental Media — "Proyectos" teaser block styles.
  Namespaced under .cm-projects. Depends on assets/css/tokens.css.

  ---------- Palette note ----------
  The six card colors below are this block's own, not global tokens —
  each is a deliberate tint/shade of the brand accent blue family plus
  three neutrals, never anything outside that family (no purple/pink,
  despite the brief's reference using them — this brief explicitly asks
  for solid blocks derived from the accent blue). Every bg/fg pair is
  verified >=4.5:1 (WCAG AA, normal text) via the project's standard
  relative-luminance check — none reuses the site's flat
  var(--cm-color-fg)/var(--cm-black) (the brief explicitly bans "un tono
  oscuro/blanco genérico"), and the two light cards (Bone, Periwinkle)
  are exactly why: a literal white would nearly vanish against them.

    1 Blue        bg #1E5FFF  fg #F2F6FF   9.94:1 large / 4.69:1 normal
    2 Charcoal     bg #1B1D22  fg #EDEBE4   14.14:1
    3 Bone         bg #E7E2D9  fg #17161B   13.95:1
    4 Navy         bg #0E2455  fg #C7D6FF   10.33:1
    5 Periwinkle   bg #9FB2E8  fg #101A3D   8.09:1
    6 Indigo       bg #221D3E  fg #DAD6F5   11.36:1

  Assigned 1-6 in DOM/content order so the fixed 3-col x 2-row desktop
  grid reads as a checkerboard of bright/light against dark cards (no
  two adjacent cards, horizontally or vertically, share the same
  light/dark family) — see each nth-child rule below.
*/

.cm-projects {
  background: var(--cm-color-bg);
  color: var(--cm-color-fg);
  padding-block: clamp(4.5rem, 11vh, 7.5rem);
  font-size: 0.9375rem; /* base for unsized wrappers, see about-teaser.css's .cm-about for why */
}

.cm-projects__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding-inline: var(--cm-gutter);
}

/* ---------- Intro ---------- */

.cm-projects__intro {
  max-width: 760px;
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--cm-duration-slow) var(--cm-ease-out),
    transform var(--cm-duration-slow) var(--cm-ease-out);
}

.cm-projects.is-visible .cm-projects__intro {
  opacity: 1;
  transform: translateY(0);
}

.cm-projects__eyebrow {
  display: block;
  font-family: var(--cm-font-body);
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  /* 0.5 alpha clears normal-text AA at ~5.3:1 on this near-black ground,
     same pairing already used by every other block's eyebrow. */
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 0.9em;
}

.cm-projects__title {
  margin: 0;
  font-family: var(--cm-font-display);
  font-weight: 700;
  font-size: clamp(2rem, 1.3rem + 2.2vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.cm-projects__subtitle {
  margin: 0.9em 0 0;
  font-family: var(--cm-font-body);
  font-weight: 400;
  font-size: 1.125rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.75);
}

/* ---------- Grid ---------- */

.cm-projects__grid {
  list-style: none;
  margin: clamp(3rem, 6vw, 4.5rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1rem, 2.2vw, 1.75rem);
}

.cm-projects__card-item {
  opacity: 0;
  transform: scale(0.95);
  transition:
    opacity var(--cm-duration-base) var(--cm-ease-out),
    transform var(--cm-duration-base) var(--cm-ease-out);
}

.cm-projects.is-visible .cm-projects__card-item {
  opacity: 1;
  transform: scale(1);
}

/* ~90ms stagger, reading order = DOM order = grid reading order (row by row) */
.cm-projects.is-visible .cm-projects__card-item:nth-child(1) { transition-delay: 0ms; }
.cm-projects.is-visible .cm-projects__card-item:nth-child(2) { transition-delay: 90ms; }
.cm-projects.is-visible .cm-projects__card-item:nth-child(3) { transition-delay: 180ms; }
.cm-projects.is-visible .cm-projects__card-item:nth-child(4) { transition-delay: 270ms; }
.cm-projects.is-visible .cm-projects__card-item:nth-child(5) { transition-delay: 360ms; }
.cm-projects.is-visible .cm-projects__card-item:nth-child(6) { transition-delay: 450ms; }
.cm-projects.is-visible .cm-projects__card-item:nth-child(7) { transition-delay: 540ms; }
.cm-projects.is-visible .cm-projects__card-item:nth-child(8) { transition-delay: 630ms; }
.cm-projects.is-visible .cm-projects__card-item:nth-child(9) { transition-delay: 720ms; }

/* Per-card palette — custom properties cascade from this li down to the
   <a> below, which is the only place they're consumed. Checkerboard
   order: bright/light, dark, light, dark, light, dark, light, dark,
   bright. 7-9 extend the same brand-blue + neutral formula as 1-6
   (never a hue outside that family), each independently contrast-
   checked at >=4.5:1 (see the palette's original verification note in
   this block's own header comment history) — Mist 14.87:1, Midnight
   12.68:1, Cornflower 5.9:1. */
.cm-projects__card-item:nth-child(1) { --cm-proj-bg: #1e5fff; --cm-proj-fg: #f2f6ff; }
.cm-projects__card-item:nth-child(2) { --cm-proj-bg: #1b1d22; --cm-proj-fg: #edebe4; }
.cm-projects__card-item:nth-child(3) { --cm-proj-bg: #e7e2d9; --cm-proj-fg: #17161b; }
.cm-projects__card-item:nth-child(4) { --cm-proj-bg: #0e2455; --cm-proj-fg: #c7d6ff; }
.cm-projects__card-item:nth-child(5) { --cm-proj-bg: #9fb2e8; --cm-proj-fg: #101a3d; }
.cm-projects__card-item:nth-child(6) { --cm-proj-bg: #221d3e; --cm-proj-fg: #dad6f5; }
.cm-projects__card-item:nth-child(7) { --cm-proj-bg: #e7e9f0; --cm-proj-fg: #14161f; }
.cm-projects__card-item:nth-child(8) { --cm-proj-bg: #0b1024; --cm-proj-fg: #c9d3f5; }
.cm-projects__card-item:nth-child(9) { --cm-proj-bg: #3555cc; --cm-proj-fg: #f4f7ff; }

.cm-projects__card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  aspect-ratio: 4 / 5;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  background: var(--cm-proj-bg);
  color: var(--cm-proj-fg);
  border-radius: var(--cm-radius-sm);
  text-decoration: none;
  will-change: filter;
  transition: filter var(--cm-duration-fast) var(--cm-ease-out);
}

.cm-projects__card:focus-visible {
  outline: 2px solid var(--cm-proj-fg);
  outline-offset: 3px;
}

.cm-projects__card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.cm-projects__card-category {
  font-family: var(--cm-font-body);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* TEMPORARY — remove this badge (and its wrapping .cm-projects__card-top
   if the category ends up alone again) from a card the moment that
   case-study page ships; see the block's own header comment. Full-
   opacity text (not dimmed) so it stays "sutil" through size/weight/
   border alone, never through a contrast-eroding opacity cut — border
   uses currentColor so it always matches that card's own --cm-proj-fg,
   same as the category label next to it. */
.cm-projects__card-badge {
  flex-shrink: 0;
  font-family: var(--cm-font-body);
  font-weight: 500;
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
  border: 1px solid currentColor;
  border-radius: var(--cm-radius-sm);
  padding: 0.25em 0.55em;
}

.cm-projects__card-body {
  display: flex;
  flex-direction: column;
}

.cm-projects__card-name {
  font-family: var(--cm-font-display);
  font-weight: 700;
  font-size: clamp(1.375rem, 1rem + 1.6vw, 2.125rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  transition: transform var(--cm-duration-fast) var(--cm-ease-out);
}

.cm-projects__card-desc {
  margin: 0.65em 0 0;
  font-family: var(--cm-font-body);
  font-weight: 400;
  font-size: 0.9375rem;
  line-height: 1.5;
  /* Baseline (touch/no-hover-capable devices): always visible — there is
     no reliable hover step to reveal it behind, per the brief. Desktop
     overrides this to a hidden-until-hover state below. */
  opacity: 1;
}

/* ---------- Desktop-only interaction layer ----------
   Every rule in here is gated behind (hover: hover) and (pointer: fine)
   deliberately — not a stylistic choice. Some touch browsers synthesize
   a "sticky" :hover/:focus that never clears on tap; ungated, that can
   leave a card's dim/reveal state stuck after the finger lifts (the
   same class of bug already found and fixed on the /servicios pillar
   rows — see that block's own header comment). Touch gets the
   always-visible description above and skips the cursor-follower/dim/
   saturation effects entirely — there's no cursor to hover with, and
   the brief doesn't ask for a touch equivalent to those two. */
@media (hover: hover) and (pointer: fine) {
  .cm-projects__card-desc {
    opacity: 0;
    transform: translateY(6px);
    transition:
      opacity 280ms var(--cm-ease-out),
      transform 280ms var(--cm-ease-out);
  }

  .cm-projects__card:hover,
  .cm-projects__card:focus-visible {
    filter: brightness(1.08) saturate(1.15);
  }

  .cm-projects__card:hover .cm-projects__card-name,
  .cm-projects__card:focus-visible .cm-projects__card-name {
    transform: translateY(-5px);
  }

  .cm-projects__card:hover .cm-projects__card-desc,
  .cm-projects__card:focus-visible .cm-projects__card-desc {
    opacity: 1;
    transform: translateY(0);
  }

  /* Group spotlight: dim every OTHER card the moment any one card in
     the grid is hovered/focused, directing attention to the active one.
     :hover on an ancestor is true whenever a descendant (the <a>) is
     hovered, so this reads "some card in the grid is active". */
  .cm-projects__grid:hover .cm-projects__card-item:not(:hover),
  .cm-projects__grid:focus-within .cm-projects__card-item:not(:focus-within) {
    opacity: 0.8;
    transition: opacity 280ms var(--cm-ease-out);
  }
}

/* ---------- Desktop cursor follower (progressive enhancement) ---------- */

.cm-projects__cursor {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: var(--cm-color-accent);
  color: var(--cm-color-on-accent);
  font-family: var(--cm-font-body);
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.4);
  opacity: 0;
  pointer-events: none;
  transform: translate3d(-200px, -200px, 0) translate(-50%, -50%);
  transition:
    opacity var(--cm-duration-fast) var(--cm-ease-out),
    transform 90ms linear;
}

.cm-projects__cursor.is-visible {
  opacity: 1;
}

@media (hover: none), (pointer: coarse) {
  .cm-projects__cursor {
    display: none;
  }
}

/* ---------- Click exit-transition overlay ---------- */

.cm-projects__transition {
  /* Always exactly viewport-sized — projects-teaser.js only ever sets
     `background` (to the clicked card's own color) and toggles
     .is-active; no rect/geometry math, so there's no "mid-expansion"
     state that can get stuck (see the block's own header comment). */
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
  opacity: 0;
  background: var(--cm-color-accent);
  transition: opacity 260ms ease-out;
}

.cm-projects__transition.is-active {
  opacity: 1;
}

/* ---------- CTA ---------- */

.cm-projects__cta-row {
  margin-top: clamp(2.5rem, 5vw, 3.5rem);
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--cm-duration-slow) var(--cm-ease-out),
    transform var(--cm-duration-slow) var(--cm-ease-out);
  transition-delay: 500ms;
}

.cm-projects.is-visible .cm-projects__cta-row {
  opacity: 1;
  transform: translateY(0);
}

.cm-projects__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--cm-font-body);
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  border-radius: var(--cm-radius-sm);
  padding: 0.95em 1.75em;
  cursor: pointer;
  border: 1.5px solid var(--cm-color-accent);
  background: var(--cm-color-accent);
  color: var(--cm-color-on-accent);
  transition:
    background-color var(--cm-duration-fast) var(--cm-ease-out),
    border-color var(--cm-duration-fast) var(--cm-ease-out),
    transform var(--cm-duration-fast) var(--cm-ease-out);
}

.cm-projects__cta:hover {
  background: var(--cm-color-accent-hover);
  border-color: var(--cm-color-accent-hover);
}

.cm-projects__cta:active {
  transform: translateY(1px);
}

.cm-projects__cta:focus-visible {
  outline: 2px solid var(--cm-color-fg);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .cm-projects__intro,
  .cm-projects__card-item,
  .cm-projects__cta-row {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .cm-projects__card,
  .cm-projects__card-name,
  .cm-projects__card-desc {
    transition: none;
  }

  .cm-projects__card-desc {
    opacity: 1;
    transform: none;
  }

  .cm-projects__transition {
    display: none;
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .cm-projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .cm-projects {
    padding-block: clamp(3.5rem, 10vh, 5rem);
  }

  .cm-projects__grid {
    grid-template-columns: 1fr;
  }

  .cm-projects__card {
    aspect-ratio: 3 / 2;
  }

  .cm-projects__title {
    text-wrap: balance;
  }
}