/* ============================================================
   CELSIK Group — landing page styles.
   Composes the CELSIK design-system tokens; no invented values.
   ============================================================ */

html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--surface-page);
  color: var(--text-primary);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--plum-700); color: var(--white); }

a { color: var(--green-700); text-decoration: none; transition: color var(--dur-fast) var(--ease-standard); }
a:hover { color: var(--plum-700); }

/* Animated left→right underline for text links */
.cs-lnk { position: relative; }
.cs-lnk::after {
  content: '';
  position: absolute;
  left: 0; bottom: -4px;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-normal) var(--ease-out);
}
.cs-lnk:hover::after, .cs-lnk:focus-visible::after { transform: scaleX(1); }

.cs-container { max-width: var(--container-max); margin: 0 auto; padding: 0 40px; }

.cs-eyebrow {
  font-family: var(--font-ui);
  font-size: var(--text-2xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-muted);
}
.cs-eyebrow--dark { color: var(--green-200); }

.cs-h2 {
  font-family: var(--font-display);
  font-size: clamp(30px, 3.4vw, var(--text-3xl));
  font-weight: var(--weight-medium);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  margin: 0;
  text-wrap: pretty;
}

/* ---- Scroll reveal (fade-up, subtle) ------------------------ */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 360ms var(--ease-standard), transform 380ms var(--ease-out);
}
.reveal.is-in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 90ms; }
.reveal.d2 { transition-delay: 180ms; }
.reveal.d3 { transition-delay: 270ms; }

/* ---- Intro: cortina que se abre por una costura en chevron ----- */
.cs-intro { position: fixed; inset: 0; z-index: 100; pointer-events: none; overflow: hidden; }
.cs-intro-panel {
  position: absolute; inset: 0;
  background: var(--green-700);
  will-change: transform;
  transition: transform 1000ms cubic-bezier(0.76, 0, 0.24, 1);
}
/* La unión entre los dos paneles dibuja el chevron de la marca */
.cs-intro-top { clip-path: polygon(0 0, 100% 0, 100% 46%, 50% 60%, 0 46%); }
.cs-intro-bot { clip-path: polygon(0 46%, 50% 60%, 100% 46%, 100% 100%, 0 100%); }
.cs-intro.p2 .cs-intro-top { transform: translateY(-101%); }
.cs-intro.p2 .cs-intro-bot { transform: translateY(101%); }

.cs-intro-center {
  position: absolute; inset: 0; z-index: 2;
  display: flex; align-items: center; justify-content: center;
}
.cs-intro-mark {
  position: absolute;
  width: clamp(74px, 9vw, 104px); height: auto;
  border-radius: 4px;
  opacity: 0; transform: scale(0.82);
  transition: opacity 460ms var(--ease-standard), transform 760ms var(--ease-out);
}
.cs-intro.p1 .cs-intro-mark { opacity: 1; transform: scale(1); }
.cs-intro.p2 .cs-intro-mark { opacity: 0; transform: scale(1.35); }

/* Flechas grandes que se abren hacia fuera */
.cs-intro-arrows {
  position: absolute;
  width: clamp(300px, 46vw, 560px); height: auto;
  overflow: visible;
}
.cs-a {
  stroke: var(--white); stroke-width: 1.4;
  stroke-linecap: round; stroke-linejoin: round;
  opacity: 0;
  transition: opacity 600ms var(--ease-standard), transform 1000ms var(--ease-out);
}
.cs-intro.p1 .cs-a { opacity: 0.5; }
.cs-intro.p1 .a2, .cs-intro.p1 .a4 { opacity: 0.26; }
.cs-intro.p2 .cs-a { opacity: 0; }
.cs-intro.p2 .up { transform: translateY(-96px); }
.cs-intro.p2 .dn { transform: translateY(96px); }

/* Wordmark CELSIK GROUP en la barra de navegación */
.cs-nav-wordmark { height: 36px; width: auto; display: block; }
@media (max-width: 980px) { .cs-nav-wordmark { height: 30px; } }

/* ---- Navigation — floating pill (detaches on scroll) ---------- */
.cs-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 40;
  display: flex; justify-content: center;
  pointer-events: none;
}
.cs-nav-inner {
  pointer-events: auto;
  box-sizing: border-box;
  width: 100%;
  max-width: var(--container-wide);
  margin: 0;
  padding: 14px 40px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 999px;
  transition:
    margin 460ms var(--ease-out),
    max-width 460ms var(--ease-out),
    padding 460ms var(--ease-out),
    background 320ms var(--ease-standard),
    border-color 320ms var(--ease-standard),
    border-radius 460ms var(--ease-out),
    box-shadow 320ms var(--ease-standard);
}
.cs-nav.is-solid .cs-nav-inner {
  margin-top: 12px;
  max-width: 900px;
  padding: 7px 18px;
  background: rgba(29, 46, 28, 0.8);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
  border-color: rgba(255, 255, 255, 0.14);
  box-shadow: var(--shadow-lg);
}
.cs-nav.menu-open .cs-nav-inner {
  margin-top: 0;
  max-width: 100%;
  border-radius: 0;
  background: var(--green-700);
}
.cs-nav-logo { display: block; line-height: 1; transition: transform 320ms var(--ease-out); transform-origin: left center; }
.cs-nav.is-solid .cs-nav-logo { transform: scale(0.82); }
.cs-nav-links { display: flex; align-items: center; gap: 4px; }
.cs-nav-links a {
  font-family: var(--font-ui);
  font-size: var(--text-3xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--white);
  opacity: 0.9;
  padding: 9px 14px;
  border-radius: 999px;
  transition: background 200ms var(--ease-standard), transform 200ms var(--ease-out), opacity 200ms var(--ease-standard);
}
.cs-nav-links a:hover, .cs-nav-links a:focus-visible {
  color: var(--white); opacity: 1;
  background: rgba(255, 255, 255, 0.13);
  transform: scale(1.09);
}
.cs-nav-links a:active { transform: scale(1.02); background: rgba(255, 255, 255, 0.22); }
.cs-nav-right { display: flex; align-items: center; gap: 20px; }

/* Selector de idioma: cápsula de cristal a juego con la barra de navegación */
.cs-langs {
  display: flex; align-items: center; gap: 3px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-pill);
  padding: 3px;
  background: rgba(255, 255, 255, 0.06);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  backdrop-filter: blur(10px) saturate(140%);
}
.cs-langs button {
  font-family: var(--font-ui);
  font-size: var(--text-3xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  line-height: 1;
  color: var(--white);
  opacity: 0.7;
  background: transparent; border: 0;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background 260ms var(--ease-out), color 220ms var(--ease-standard),
              opacity 220ms var(--ease-standard), transform 200ms var(--ease-out);
}
.cs-langs button:hover { opacity: 1; background: rgba(255, 255, 255, 0.12); }
.cs-langs button:active { transform: scale(0.95); }
.cs-langs button.on {
  background: var(--white);
  color: var(--green-800);
  opacity: 1;
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.20);
}

.cs-burger {
  display: none;
  background: none; border: 0; cursor: pointer;
  padding: 10px; margin: -10px -6px -10px 0;
}
.cs-burger span {
  display: block; width: 22px; height: 1.5px;
  background: var(--white);
  margin: 5px 0;
  transition: transform var(--dur-normal) var(--ease-out), opacity var(--dur-fast);
}
.cs-burger.open span:first-child { transform: translateY(3.25px) rotate(45deg); }
.cs-burger.open span:last-child { transform: translateY(-3.25px) rotate(-45deg); }

.cs-mobilemenu {
  position: fixed; inset: 0; z-index: 39;
  background: var(--green-700);
  display: flex; flex-direction: column; justify-content: center;
  padding: 0 40px;
  gap: 8px;
}
.cs-mobilemenu a {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--white);
  padding: 10px 0;
  border-bottom: 1px solid var(--border-inverse);
}

/* ---- Hero ----------------------------------------------------- */
.cs-hero {
  position: relative;
  min-height: 100svh;
  background: var(--green-700);
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.cs-hero-canvas { position: absolute; inset: 0; display: block; }
.cs-hero-scrim {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 46% 42% at 50% 47%, rgba(29,46,28,0.88) 0%, rgba(29,46,28,0.42) 58%, rgba(29,46,28,0) 100%);
  pointer-events: none;
}
.cs-hero-content {
  position: relative;
  text-align: center;
  padding: 140px 24px 120px;
  max-width: 880px;
  pointer-events: none;
}
.cs-hero-content a, .cs-hero-content button { pointer-events: auto; }
.cs-hero h1 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: var(--weight-medium);
  font-size: clamp(34px, 4.7vw, 62px);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--white);
  margin: 34px 0 22px;
  text-wrap: balance;
}
.cs-hero-sub {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--slate-200);
  max-width: 54ch;
  margin: 0 auto 40px;
}
.cs-hero-ctas { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

/* Hero buttons — quiet; aubergine appears only on press */
.cs-btn-hero {
  font-family: var(--font-ui);
  font-weight: var(--weight-semibold);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  line-height: 1;
  padding: 16px 32px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-standard),
              color var(--dur-fast) var(--ease-standard),
              border-color var(--dur-fast) var(--ease-standard),
              transform var(--dur-fast) var(--ease-standard);
}
.cs-btn-hero--solid { background: var(--white); color: var(--green-800); }
.cs-btn-hero--solid:hover { background: var(--slate-100); }
.cs-btn-hero--ghost { background: transparent; color: var(--white); border-color: var(--border-inverse); }
.cs-btn-hero--ghost:hover { background: rgba(255, 255, 255, 0.08); }
.cs-btn-hero:active {
  background: var(--plum-700);
  color: var(--white);
  border-color: var(--plum-700);
  transform: translateY(1px);
}

.cs-scrollhint {
  position: absolute; bottom: 26px; left: 50%;
  transform: translateX(-50%);
  color: var(--white);
  opacity: 0.66;
  padding: 8px;
  line-height: 0;
}
.cs-scrollhint:hover { color: var(--white); opacity: 1; }
.cs-scrollhint svg { animation: csBob 2.4s var(--ease-standard) infinite; }
@keyframes csBob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(7px); }
}

/* ---- Sections ------------------------------------------------- */
.cs-section { padding: 104px 0; }
.cs-section--band { padding: 78px 0; }

/* Chevron texture on green bands */
.cs-band-texture {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.4;
  pointer-events: none;
}

/* ---- Mandates table ------------------------------------------- */
.cs-mhead, .cs-mrow {
  display: grid;
  grid-template-columns: 2.3fr 1.5fr 1.25fr 0.95fr;
  gap: 24px;
  align-items: baseline;
}
.cs-mhead {
  padding: 0 10px 12px;
  font-family: var(--font-ui);
  font-size: var(--text-3xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-muted);
}
.cs-mrow {
  padding: 22px 10px;
  border-top: 1px solid var(--border-subtle);
  transition: background var(--dur-fast) var(--ease-standard);
  outline: none;
}
.cs-mtable > .cs-mrow:last-of-type { border-bottom: 1px solid var(--border-subtle); }
.cs-mrow:hover, .cs-mrow:focus-visible { background: var(--surface-sunken); }
.cs-mrow-extra {
  grid-column: 1 / -1;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: max-height var(--dur-normal) var(--ease-out), opacity var(--dur-normal) var(--ease-standard), padding-top var(--dur-normal) var(--ease-out);
}
.cs-mrow:hover .cs-mrow-extra,
.cs-mrow:focus-visible .cs-mrow-extra,
.cs-mrow:focus-within .cs-mrow-extra {
  max-height: 72px;
  opacity: 1;
  padding-top: 8px;
}
@media (hover: none) {
  .cs-mrow-extra { max-height: none; opacity: 1; padding-top: 8px; }
}

/* ---- Accordion (research theses) ------------------------------ */
.cs-acc {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--surface-card);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.cs-acc-item + .cs-acc-item { border-top: 1px solid var(--border-subtle); }
.cs-acc-btn {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  width: 100%;
  background: none; border: 0; cursor: pointer;
  padding: 18px 24px;
  text-align: left;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--weight-medium);
  color: var(--text-primary);
  transition: background var(--dur-fast) var(--ease-standard);
}
.cs-acc-btn:hover { background: var(--surface-sunken); }
.cs-acc-chev { flex-shrink: 0; transition: transform var(--dur-normal) var(--ease-out); color: var(--slate-500); }
.cs-acc-item.open .cs-acc-chev { transform: rotate(180deg); }
.cs-acc-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 300ms var(--ease-out);
}
.cs-acc-item.open .cs-acc-panel { max-height: 200px; }
.cs-acc-panel p {
  margin: 0;
  padding: 0 24px 20px;
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: var(--leading-normal);
  color: var(--text-secondary);
  max-width: 72ch;
}

/* ---- Form fields (select / textarea to match DS Input) -------- */
.cs-field { display: flex; flex-direction: column; gap: 6px; width: 100%; }
.cs-field > label {
  font-family: var(--font-ui);
  font-size: var(--text-2xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--text-secondary);
}
.cs-select, .cs-textarea {
  font-family: var(--font-body);
  font-size: var(--text-md);
  color: var(--text-primary);
  background: var(--surface-card);
  padding: 11px 14px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  outline: none;
  width: 100%;
  box-sizing: border-box;
  transition: border-color var(--dur-fast) var(--ease-standard), box-shadow var(--dur-fast) var(--ease-standard);
}
.cs-textarea { resize: vertical; min-height: 108px; }
.cs-select:focus, .cs-textarea:focus {
  border-color: var(--green-600);
  box-shadow: 0 0 0 3px rgba(41, 64, 32, 0.12);
}

/* ---- Team portraits (duotone) ---------------------------------- */
.cs-portrait {
  position: relative;
  aspect-ratio: 4 / 4.6;
  background: var(--green-800);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 22px;
}
.cs-portrait-pattern {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.3;
  pointer-events: none;
}
.cs-portrait image-slot {
  position: absolute; inset: 0;
  filter: grayscale(1) contrast(1.04);
}
.cs-portrait-tint {
  position: absolute; inset: 0;
  background: var(--green-700);
  mix-blend-mode: color;
  opacity: 0.6;
  pointer-events: none;
}

/* ---- Perspectives cards ---------------------------------------- */
.cs-persp-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--weight-medium);
  line-height: var(--leading-snug);
  color: var(--text-primary);
  margin: 14px 0 10px;
  text-wrap: pretty;
}
a.cs-persp-link { display: block; }
a.cs-persp-link:hover .cs-persp-title { color: var(--plum-700); }

/* ---- Perspectives modal (card over blurred page) ---------------- */
.cs-modal-backdrop {
  position: fixed; inset: 0; z-index: 80;
  background: rgba(16, 28, 15, 0.45);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  animation: csFade 240ms var(--ease-standard);
}
.cs-modal-card {
  position: relative;
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 720px; width: 100%;
  max-height: 84vh;
  overflow: auto;
  padding: 56px;
  box-sizing: border-box;
  animation: csCardIn 320ms var(--ease-out);
}
.cs-modal-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--weight-medium);
  line-height: var(--leading-snug);
  color: var(--text-primary);
  margin: 14px 0 22px;
  text-wrap: pretty;
}
.cs-modal-card p {
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  margin: 0 0 18px;
}
.cs-modal-close {
  position: absolute; top: 18px; right: 18px;
  width: 36px; height: 36px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: var(--surface-card);
  color: var(--slate-700);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--dur-fast) var(--ease-standard), transform var(--dur-fast) var(--ease-out);
}
.cs-modal-close:hover { background: var(--slate-100); transform: scale(1.08); }
@keyframes csFade { from { opacity: 0; } }
@keyframes csCardIn { from { opacity: 0; transform: translateY(16px) scale(0.985); } }
@media (max-width: 640px) { .cs-modal-card { padding: 34px 24px; } }

/* ---- Aviso de cookies ------------------------------------------ */
.cs-cookie {
  position: fixed; z-index: 90;
  left: 50%; bottom: 22px;
  transform: translateX(-50%);
  width: min(960px, calc(100vw - 32px));
  animation: csCookieIn 520ms var(--ease-out) both;
}
.cs-cookie-inner {
  display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
  background: rgba(29, 46, 28, 0.94);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 20px 24px;
}
.cs-cookie-text {
  flex: 1 1 380px;
  margin: 0;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--slate-200);
}
.cs-cookie-text a { color: var(--green-200); }
.cs-cookie-text a:hover { color: var(--white); }
.cs-cookie-actions { display: flex; gap: 10px; flex-shrink: 0; }
.cs-cookie-btn {
  font-family: var(--font-ui);
  font-size: var(--text-2xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  line-height: 1;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--dur-fast) var(--ease-standard),
              color var(--dur-fast) var(--ease-standard),
              transform var(--dur-fast) var(--ease-standard);
}
.cs-cookie-btn.solid { background: var(--white); color: var(--green-800); }
.cs-cookie-btn.solid:hover { background: var(--slate-100); }
.cs-cookie-btn.ghost { background: transparent; color: var(--white); border-color: var(--border-inverse); }
.cs-cookie-btn.ghost:hover { background: rgba(255, 255, 255, 0.1); }
.cs-cookie-btn:active { transform: translateY(1px); }
@keyframes csCookieIn { from { opacity: 0; transform: translateX(-50%) translateY(16px); } }
@media (max-width: 620px) {
  .cs-cookie { bottom: 12px; }
  .cs-cookie-inner { padding: 18px; gap: 16px; }
  .cs-cookie-actions { width: 100%; }
  .cs-cookie-btn { flex: 1; }
}

/* ---- Responsive ------------------------------------------------- */
@media (max-width: 980px) {
  .cs-container { padding: 0 24px; }
  .cs-nav-inner { padding: 12px 24px; }
  .cs-nav-links { display: none; }
  .cs-burger { display: block; }
  .cs-section { padding: 72px 0; }
  .cs-grid-2, .cs-grid-3 { grid-template-columns: 1fr !important; }
  .cs-grid-4 { grid-template-columns: 1fr 1fr !important; row-gap: 40px; }
  .cs-charts-row { grid-template-columns: 1fr !important; }
  .cs-mhead { display: none; }
  .cs-mrow { grid-template-columns: 1fr; gap: 6px; padding: 20px 8px; }
  .cs-contact-grid { grid-template-columns: 1fr !important; gap: 48px !important; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .cs-scrollhint svg { animation: none; }
  .cs-intro { display: none; }
  .cs-mrow-extra, .cs-acc-panel, .cs-acc-chev { transition: none; }
  .cs-nav-inner, .cs-nav-logo, .cs-nav-links a { transition: none; }
  .cs-modal-backdrop, .cs-modal-card { animation: none; }
}