/* =====================================================================
   SPAININSIDER — Real Estate Advisory, Spain
   Swiss / architectural one-page. Mobile-first. Deep-blue accent.
   ===================================================================== */

/* ------------------------------ TOKENS ------------------------------ */
:root {
  /* palette — monochrome + single accent */
  --paper:        #F2F2F0;
  --paper-2:      #E9E9E6;
  --ink:          #0E0F11;
  --graphite:     #191B1E;
  --concrete:     #6E7278;
  --concrete-2:   #9B9EA3;
  --line:         rgba(14, 15, 17, .13);
  --line-strong:  rgba(14, 15, 17, .26);

  --accent:       #1B3BD9;
  --accent-press: #142CA6;
  --on-accent:    #FFFFFF;

  --inv-bg:       #0E0F11;
  --inv-ink:      #F2F2F0;
  --inv-line:     rgba(242, 242, 240, .16);
  --inv-mute:     rgba(242, 242, 240, .55);

  /* structure */
  --maxw: 1360px;
  --gut: clamp(20px, 6vw, 72px);
  --header-h: 68px;

  /* type */
  --sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', 'Menlo', monospace;

  --fs-display: clamp(2.7rem, 9.2vw, 8.2rem);
  --fs-h2:      clamp(2rem, 5.4vw, 4.4rem);
  --fs-h3:      clamp(1.35rem, 2.6vw, 2rem);
  --fs-lead:    clamp(1.05rem, 2.1vw, 1.5rem);
  --fs-body:    clamp(1rem, 1.4vw, 1.15rem);
  --fs-mono:    clamp(.7rem, 1.05vw, .82rem);

  --ease: cubic-bezier(.16, 1, .3, 1);
}

/* ------------------------------ RESET ------------------------------ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  font-family: var(--sans);
  font-size: var(--fs-body);
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  font-feature-settings: 'ss01' 1, 'cv05' 1;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
::selection { background: var(--accent); color: var(--on-accent); }

/* intro fade — reveal page once i18n + fonts settle */
body {
  opacity: 1;
  transition: opacity .5s var(--ease);
}
/* fail-safe: force visible after 1.6s even if JS never clears the class */
body.is-loading {
  opacity: 0;
  animation: introFailsafe .01s linear 1.6s forwards;
}
@keyframes introFailsafe { to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  body, body.is-loading { opacity: 1 !important; transition: none; animation: none; }
}

/* ------------------------------ HELPERS ------------------------------ */
.shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gut);
}

.mono {
  font-family: var(--mono);
  font-size: var(--fs-mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  font-weight: 500;
}

.skip-link {
  position: fixed;
  top: -100px; left: 12px;
  z-index: 200;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 16px;
  font-family: var(--mono);
  font-size: .75rem;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ============================ REVEAL ============================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
  will-change: opacity, transform;
}
[data-reveal].is-in {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1 !important; transform: none !important; transition: none; }
}

/* ============================ HEADER ============================ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background .4s var(--ease), border-color .4s var(--ease), backdrop-filter .4s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(242, 242, 240, .82);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom-color: var(--line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  line-height: 1;
}
.brand__mark {
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: .14em;
}
.brand__loc {
  font-family: var(--mono);
  font-size: .62rem;
  letter-spacing: .1em;
  color: var(--accent);
  border: 1px solid var(--line-strong);
  padding: 2px 5px;
  border-radius: 2px;
  transform: translateY(-1px);
}

.nav { display: none; }
@media (min-width: 940px) {
  .nav {
    display: flex;
    gap: clamp(18px, 2.4vw, 40px);
    margin-left: auto;
    margin-right: clamp(18px, 3vw, 48px);
  }
  .nav__link {
    display: inline-flex;
    align-items: baseline;
    gap: 7px;
    font-size: .92rem;
    font-weight: 500;
    color: var(--ink);
    position: relative;
    padding-bottom: 3px;
  }
  .nav__idx {
    font-family: var(--mono);
    font-size: .62rem;
    color: var(--concrete);
    letter-spacing: .05em;
  }
  .nav__link::after {
    content: "";
    position: absolute;
    left: 0; bottom: 0;
    width: 100%; height: 1px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .4s var(--ease);
  }
  .nav__link:hover::after,
  .nav__link.is-active::after { transform: scaleX(1); }
  .nav__link.is-active .nav__idx { color: var(--accent); }
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 14px;
}
.lang {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  font-family: var(--mono);
}
.lang__btn {
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--concrete);
  padding: 6px 7px;
  border-radius: 3px;
  transition: color .25s var(--ease), background .25s var(--ease);
}
.lang__btn:hover { color: var(--ink); }
.lang__btn.is-active { color: var(--ink); font-weight: 600; }
.lang__btn.is-active::before {
  content: "";
  display: inline-block;
  width: 5px; height: 5px;
  background: var(--accent);
  border-radius: 50%;
  margin-right: 5px;
  transform: translateY(-1px);
}

.menu-toggle {
  display: inline-flex;
  width: 40px; height: 40px;
  align-items: center;
  justify-content: center;
  margin-right: -8px;
}
.menu-toggle__bars { position: relative; width: 22px; height: 12px; display: block; }
.menu-toggle__bars i {
  position: absolute; left: 0;
  width: 100%; height: 1.6px;
  background: var(--ink);
  transition: transform .4s var(--ease), opacity .3s var(--ease);
}
.menu-toggle__bars i:nth-child(1) { top: 1px; }
.menu-toggle__bars i:nth-child(2) { bottom: 1px; }
.is-menu-open .menu-toggle__bars i:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.is-menu-open .menu-toggle__bars i:nth-child(2) { transform: translateY(-4px) rotate(-45deg); }
@media (min-width: 940px) { .menu-toggle { display: none; } }

/* ============================ MOBILE MENU ============================ */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: var(--paper);
  padding: calc(var(--header-h) + 24px) var(--gut) 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity .4s var(--ease), transform .4s var(--ease);
}
.mobile-menu[hidden] { display: none; }
.is-menu-open .mobile-menu {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.mobile-menu__nav { display: flex; flex-direction: column; }
.mobile-menu__link {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 0;
  font-size: clamp(1.9rem, 9vw, 3rem);
  font-weight: 700;
  letter-spacing: -.02em;
  border-bottom: 1px solid var(--line);
}
.mobile-menu__idx {
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--accent);
  font-weight: 500;
}
.mobile-menu__foot { color: var(--concrete); }

/* ============================ HERO ============================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: calc(var(--header-h) + 4vh);
  padding-bottom: 12vh;
}
.hero__inner { width: 100%; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--concrete);
  margin-bottom: clamp(24px, 5vh, 56px);
}
.eyebrow__dot {
  width: 7px; height: 7px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 3.2s var(--ease) infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .35; transform: scale(.7); }
}
@media (prefers-reduced-motion: reduce) { .eyebrow__dot { animation: none; } }

.hero__title {
  font-size: var(--fs-display);
  font-weight: 800;
  line-height: .98;
  letter-spacing: -.035em;
  max-width: 15ch;
  text-wrap: balance;
}

.hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  margin-top: clamp(36px, 7vh, 72px);
}
@media (min-width: 820px) {
  .hero__grid {
    grid-template-columns: 1.4fr 1fr;
    align-items: end;
  }
}
.hero__lead {
  font-size: var(--fs-lead);
  line-height: 1.35;
  max-width: 42ch;
  color: var(--graphite);
  font-weight: 400;
}
.hero__meta {
  display: flex;
  flex-direction: column;
  gap: 20px;
  color: var(--concrete);
}
@media (min-width: 820px) { .hero__meta { align-items: flex-end; text-align: right; } }
.hero__coords { padding-top: 12px; border-top: 1px solid var(--line-strong); width: 100%; }
@media (min-width: 820px) { .hero__coords { text-align: right; } }
.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 600;
  letter-spacing: .04em;
}
.hero__cta-arrow { transition: transform .4s var(--ease); color: var(--accent); }
.hero__cta:hover .hero__cta-arrow { transform: translateX(6px); }

.scroll-hint {
  position: absolute;
  left: var(--gut);
  bottom: 26px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--concrete);
  font-size: .68rem;
}
.scroll-hint__line {
  width: 46px; height: 1px;
  background: var(--line-strong);
  position: relative;
  overflow: hidden;
}
.scroll-hint__line::after {
  content: "";
  position: absolute; inset: 0;
  background: var(--accent);
  transform: translateX(-100%);
  animation: sweep 2.6s var(--ease) infinite;
}
@keyframes sweep {
  0% { transform: translateX(-100%); }
  55%, 100% { transform: translateX(100%); }
}
@media (prefers-reduced-motion: reduce) { .scroll-hint__line::after { animation: none; } }

/* ============================ SECTION SHARED ============================ */
.section {
  padding-block: clamp(72px, 13vh, 168px);
  border-top: 1px solid var(--line);
  scroll-margin-top: var(--header-h);
}
.section__head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: clamp(28px, 5vh, 56px);
  color: var(--concrete);
}
.section__num {
  font-size: clamp(.8rem, 1.3vw, 1rem);
  color: var(--accent);
  font-weight: 600;
}
.section__kicker { position: relative; padding-left: 16px; }
.section__kicker::before {
  content: "";
  position: absolute; left: 0; top: 50%;
  width: 8px; height: 1px;
  background: var(--line-strong);
}
.section__title {
  font-size: var(--fs-h2);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -.03em;
  max-width: 20ch;
  text-wrap: balance;
}
.section__title--wide { max-width: none; }

/* ---------------------------- 01 APPROACH ---------------------------- */
.approach__grid {
  display: grid;
  gap: clamp(28px, 5vw, 64px);
}
@media (min-width: 900px) {
  .approach__grid { grid-template-columns: 1fr 1fr; align-items: start; }
}
.approach__body { display: flex; flex-direction: column; gap: 22px; max-width: 52ch; }
.approach__body p { color: var(--graphite); }

.principles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 20px;
  margin-top: 12px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}
.principles li { display: flex; align-items: baseline; gap: 8px; color: var(--ink); }
.principles__idx { color: var(--accent); }

.approach__figure { margin-top: clamp(48px, 8vh, 96px); }
.media {
  overflow: hidden;
  background: var(--paper-2);
  aspect-ratio: 16 / 8;
}
.media img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.06);
  transform: scale(1.02);
  transition: filter .6s var(--ease), transform 1.2s var(--ease);
}
.approach__figure:hover .media img { filter: grayscale(.15) contrast(1.02); transform: scale(1); }
.approach__figure figcaption { margin-top: 14px; color: var(--concrete); }

/* ---------------------------- 02 SERVICES ---------------------------- */
.services {
  margin-top: clamp(20px, 4vh, 40px);
  border-top: 1px solid var(--line);
}
.service {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding-block: clamp(28px, 4.5vh, 48px);
  border-bottom: 1px solid var(--line);
  transition: padding-left .5s var(--ease);
}
.service__num { color: var(--accent); padding-top: 6px; }
.service__title {
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 12px;
}
.service__desc { color: var(--concrete); max-width: 62ch; }
@media (min-width: 760px) {
  .service { grid-template-columns: 90px 1.1fr 2fr; align-items: baseline; gap: 24px; }
  .service__desc { margin: 0; }
  .service:hover { padding-left: 14px; }
}

/* ---------------------------- 03 PROCESS ---------------------------- */
.steps {
  display: grid;
  gap: 0;
  margin-top: clamp(20px, 4vh, 40px);
  border-top: 1px solid var(--line);
}
.step {
  padding-block: clamp(26px, 4vh, 44px);
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 10px;
}
.step__num { color: var(--accent); }
.step__title { font-size: var(--fs-h3); font-weight: 700; letter-spacing: -.02em; }
.step__desc { color: var(--concrete); max-width: 56ch; }
@media (min-width: 760px) {
  .steps { grid-template-columns: repeat(4, 1fr); }
  .step {
    border-bottom: none;
    border-left: 1px solid var(--line);
    padding: clamp(20px, 3vh, 40px) 22px clamp(60px, 12vh, 140px);
    align-content: start;
  }
  .step:first-child { border-left: none; padding-left: 0; }
  .step__desc { max-width: none; }
}

/* ---------------------------- 04 REGIONS ---------------------------- */
.regions__intro {
  display: grid;
  gap: 20px;
  margin-bottom: clamp(28px, 5vh, 52px);
}
@media (min-width: 860px) {
  .regions__intro { grid-template-columns: 1.4fr 1fr; align-items: end; }
}
.regions__lead { color: var(--concrete); max-width: 40ch; }
.regions__list { border-top: 1px solid var(--line); }
.region {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 8px 18px;
  padding-block: clamp(20px, 3.2vh, 34px);
  border-bottom: 1px solid var(--line);
  transition: padding-left .5s var(--ease);
}
.region__idx { color: var(--accent); }
.region__name {
  font-size: clamp(1.6rem, 5.5vw, 3rem);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1;
}
.region__note { color: var(--concrete); grid-column: 2; }
@media (min-width: 760px) {
  .region { grid-template-columns: 60px 1fr auto; align-items: center; }
  .region__note { grid-column: auto; }
  .region:hover { padding-left: 14px; }
}

/* ---------------------------- 05 CONTACT ---------------------------- */
.section--contact {
  background: var(--inv-bg);
  color: var(--inv-ink);
  border-top-color: var(--inv-bg);
}
.section--contact ::selection { background: var(--on-accent); color: var(--accent); }
.section__head--inv { color: var(--inv-mute); }
.section__head--inv .section__kicker::before { background: var(--inv-line); }

.contact__grid { display: grid; gap: clamp(40px, 7vw, 80px); }
@media (min-width: 900px) {
  .contact__grid { grid-template-columns: 1.3fr 1fr; align-items: start; }
}
.contact__title {
  font-size: clamp(2.2rem, 6.5vw, 5.2rem);
  font-weight: 800;
  line-height: .98;
  letter-spacing: -.035em;
  max-width: 14ch;
  text-wrap: balance;
}
.contact__lead {
  font-size: var(--fs-lead);
  color: var(--inv-mute);
  max-width: 40ch;
  margin-top: clamp(20px, 4vh, 34px);
  line-height: 1.4;
}
.contact__mail {
  display: inline-flex;
  flex-direction: column;
  gap: 8px;
  margin-top: clamp(32px, 6vh, 56px);
}
.contact__mail-label { color: var(--inv-mute); }
.contact__mail-addr {
  font-size: clamp(1.4rem, 4vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -.02em;
  position: relative;
  width: fit-content;
  background-image: linear-gradient(var(--accent), var(--accent));
  background-size: 0% 2px;
  background-position: left 100%;
  background-repeat: no-repeat;
  transition: background-size .45s var(--ease);
  padding-bottom: 4px;
}
.contact__mail:hover .contact__mail-addr { background-size: 100% 2px; }

.contact__details { display: grid; gap: 2px; align-self: end; }
.contact__item {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 16px;
  align-items: baseline;
  padding-block: 16px;
  border-top: 1px solid var(--inv-line);
}
.contact__item:last-child { border-bottom: 1px solid var(--inv-line); }
.contact__key { color: var(--inv-mute); }
.contact__val {
  font-size: 1.02rem;
  transition: color .25s var(--ease);
}
a.contact__val:hover { color: var(--accent); }

/* ============================ FOOTER ============================ */
.site-footer {
  background: var(--inv-bg);
  color: var(--inv-mute);
  padding-block: clamp(48px, 8vh, 88px) 28px;
  border-top: 1px solid var(--inv-line);
}
.site-footer__inner {
  display: grid;
  gap: clamp(36px, 6vw, 72px);
}
@media (min-width: 820px) {
  .site-footer__inner { grid-template-columns: 1fr 1.4fr; }
}
.site-footer__brand .brand__mark { color: var(--inv-ink); font-size: 1.3rem; }
.site-footer__tag { margin-top: 12px; }

.site-footer__cols { display: grid; gap: 32px; }
@media (min-width: 560px) {
  .site-footer__cols { grid-template-columns: auto 1fr; gap: 48px; }
}
.site-footer__nav { display: flex; flex-direction: column; gap: 12px; }
.site-footer__nav a {
  color: var(--inv-ink);
  font-size: .95rem;
  width: fit-content;
  transition: color .25s var(--ease);
}
.site-footer__nav a:hover { color: var(--accent); }
.site-footer__legal { display: grid; gap: 12px; line-height: 1.7; letter-spacing: .04em; }
.site-footer__legal p { text-transform: none; }

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(40px, 7vh, 80px);
  padding-top: 24px;
  border-top: 1px solid var(--inv-line);
}
.site-footer__top { transition: color .25s var(--ease); }
.site-footer__top:hover { color: var(--accent); }

/* ============================ WIDE SCREENS ============================ */
@media (min-width: 1100px) {
  .approach__grid { grid-template-columns: 1fr 1.1fr; gap: 80px; }
  .section__title { max-width: 16ch; }
}