/* =========================================================
   IsasHomes — sistema visual "Anthropic boutique"
   Paleta cálida, microanimaciones de 2–6px, mobile-first.
   ========================================================= */

:root {
  /* Color */
  --color-bg:        #FAF9F5;
  --color-bg-alt:    #F0EEE6;
  --color-ink:       #141413;
  --color-ink-soft:  #3D3D3A;
  --color-ink-mute:  #5E5D59;
  --color-accent:    #1F3A5F;
  --color-accent-dk: #142A47;
  --color-line:      rgba(20, 20, 19, 0.08);
  --color-line-strong: rgba(20, 20, 19, 0.16);
  --color-white:     #FFFFFF;
  --color-success:   #2E7D4F;

  /* Tipografía */
  --font-serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Espaciado */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
  --space-7: 8rem;

  /* Animación — lenguaje Anthropic */
  --ease:      cubic-bezier(.165, .84, .44, 1);
  --dur-fast:  .15s;
  --dur-base:  .3s;
  --dur-slow:  .6s;

  /* Radios */
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

/* ---------- Reset ---------- */
*, *::before, *::after {
  box-sizing: border-box;
}
* {
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-ink);
  font-size: 17px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img {
  max-width: 100%;
  display: block;
}
button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}
a {
  color: inherit;
  text-decoration: none;
}

/* ---------- Tipografía ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  color: var(--color-ink);
  letter-spacing: -0.01em;
  line-height: 1.1;
}
h1 {
  font-size: clamp(2.75rem, 8vw, 5.5rem);
  letter-spacing: -0.02em;
}
h2 {
  font-size: clamp(2rem, 5vw, 3.25rem);
}
h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-family: var(--font-sans);
  font-weight: 500;
  letter-spacing: -0.005em;
}
p {
  max-width: 60ch;
}

/* ---------- Utilidades ---------- */
.container {
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
  padding-inline: var(--space-3);
}
section {
  padding-block: var(--space-6);
}
.section-subtitle {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-ink-mute);
  margin-bottom: var(--space-2);
}
.section-header {
  text-align: center;
  margin-bottom: var(--space-5);
}

/* ---------- Animaciones de entrada ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--dur-slow) var(--ease),
              transform var(--dur-slow) var(--ease);
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  padding: var(--space-2) var(--space-3);
  background: rgba(250, 249, 245, 0.85);
  border-bottom: 1px solid transparent;
  transition: background-color var(--dur-base) var(--ease),
              border-color var(--dur-base) var(--ease),
              box-shadow var(--dur-base) var(--ease);
}
.navbar.scrolled {
  background: rgba(250, 249, 245, 0.92);
  border-bottom-color: var(--color-line);
}
@supports (backdrop-filter: blur(20px)) {
  @media (min-width: 768px) {
    .navbar {
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
    }
  }
}
.navbar-container {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}
.navbar-brand {
  display: inline-grid;
  align-items: center;
  height: 40px;
  position: relative;
  transition: opacity var(--dur-fast) var(--ease);
}
.navbar-brand:hover {
  opacity: 0.75;
}
.brand-text,
.navbar-logo {
  grid-area: 1 / 1;
  transition: opacity var(--dur-base) var(--ease),
              transform var(--dur-base) var(--ease);
}
.brand-text {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  color: var(--color-ink);
  line-height: 1;
  white-space: nowrap;
  opacity: 1;
  transform: translateY(0);
}
.navbar-logo {
  height: 40px;
  width: auto;
  border-radius: 6px;
  justify-self: start;
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
}
.navbar.scrolled .brand-text {
  opacity: 0;
  transform: translateY(-4px);
}
.navbar.scrolled .navbar-logo {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.navbar-nav {
  list-style: none;
  display: none;
  align-items: center;
  gap: var(--space-1);
}
.nav-link {
  position: relative;
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--color-ink-soft);
  padding: 0.5rem 0.75rem;
  transition: color var(--dur-base) var(--ease);
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0.25rem;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-base) var(--ease);
}
.nav-link:hover,
.nav-link.active {
  color: var(--color-ink);
}
.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.mobile-menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-size: 1.25rem;
  color: var(--color-ink);
  border-radius: 6px;
  transition: background-color var(--dur-fast) var(--ease);
}
.mobile-menu-toggle:hover {
  background: var(--color-line);
}

/* ---------- Hero ---------- */
#inicio {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-block: var(--space-6) var(--space-5);
  text-align: center;
  background: var(--color-bg);
}
.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero-logo {
  width: clamp(140px, 22vw, 200px);
  margin-bottom: var(--space-4);
  border-radius: 12px;
  opacity: 0;
  animation: fadeIn 0.6s var(--ease) 0.05s forwards;
}
.hero-title {
  max-width: 18ch;
  margin-bottom: var(--space-4);
  opacity: 0;
  animation: fadeInUp 0.6s var(--ease) 0.15s forwards;
}

/* ---------- CTA Button ---------- */
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.95rem 1.75rem;
  background: var(--color-ink);
  color: var(--color-bg);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: 999px;
  border: 1px solid var(--color-ink);
  opacity: 0;
  animation: fadeInUp 0.6s var(--ease) 0.25s forwards;
  transition: transform var(--dur-base) var(--ease),
              background-color var(--dur-base) var(--ease),
              border-color var(--dur-base) var(--ease),
              box-shadow var(--dur-base) var(--ease);
}
.cta-button:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: 0 12px 24px -12px rgba(31, 58, 95, 0.45);
}
.cta-button:active {
  transform: translateY(-1px);
}

/* ---------- Filosofía ---------- */
#filosofia {
  background: var(--color-bg);
}
.filosofia-content {
  display: grid;
  gap: var(--space-4);
  align-items: center;
}
.filosofia-text h2 {
  margin-bottom: var(--space-3);
}
.filosofia-text p {
  font-size: 1.0625rem;
  color: var(--color-ink-soft);
  max-width: 50ch;
}
.filosofia-image {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

/* ---------- Servicios ---------- */
#servicios {
  background: var(--color-bg-alt);
}
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  margin-top: var(--space-4);
}
.service-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-3);
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  transition: transform var(--dur-base) var(--ease),
              border-color var(--dur-base) var(--ease),
              box-shadow var(--dur-base) var(--ease);
}
.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-line-strong);
  box-shadow: 0 10px 28px -16px rgba(20, 20, 19, 0.18);
}
.service-icon {
  width: 40px;
  height: 40px;
  color: var(--color-ink);
  transition: color var(--dur-base) var(--ease),
              transform var(--dur-base) var(--ease);
}
.service-card:hover .service-icon {
  color: var(--color-accent);
}
.service-card h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--color-ink);
}
.service-card p {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--color-ink-mute);
  line-height: 1.55;
  margin: 0;
}

/* ---------- Portfolio (carrusel) ---------- */
#portfolio {
  background: var(--color-bg);
  overflow: hidden;
}
.portfolio-carousel {
  position: relative;
  margin-top: var(--space-4);
}
.portfolio-track {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding-block: var(--space-2);
  padding-inline: calc(50% - 40%);
}
.portfolio-track::-webkit-scrollbar {
  display: none;
}
.portfolio-slide {
  flex: 0 0 80%;
  aspect-ratio: 3 / 4;
  scroll-snap-align: center;
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-bg-alt);
  transform: scale(0.94);
  opacity: 0.45;
  transition: transform var(--dur-base) var(--ease),
              opacity var(--dur-base) var(--ease);
}
.portfolio-slide.is-active {
  transform: scale(1);
  opacity: 1;
}
.portfolio-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.portfolio-caption {
  min-height: 1.8em;
  margin-top: var(--space-3);
  margin-inline: auto;
  max-width: none;
  text-align: center;
  font-family: var(--font-serif);
  font-size: 1.375rem;
  color: var(--color-ink);
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease);
}
.portfolio-caption.is-visible {
  opacity: 1;
}

.portfolio-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-3);
}
.portfolio-arrow {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-line-strong);
  color: var(--color-ink);
  align-items: center;
  justify-content: center;
  transition: background-color var(--dur-base) var(--ease),
              border-color var(--dur-base) var(--ease),
              color var(--dur-base) var(--ease),
              transform var(--dur-base) var(--ease);
}
.portfolio-arrow:hover {
  background: var(--color-ink);
  border-color: var(--color-ink);
  color: var(--color-bg);
  transform: translateY(-2px);
}
.portfolio-arrow:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  transform: none;
}
.portfolio-arrow svg {
  width: 18px;
  height: 18px;
}
@media (hover: hover) and (pointer: fine) {
  .portfolio-arrow {
    display: inline-flex;
  }
}

.portfolio-dots {
  display: flex;
  align-items: center;
  gap: 8px;
}
.portfolio-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-ink-mute);
  opacity: 0.4;
  padding: 0;
  transition: transform var(--dur-base) var(--ease),
              opacity var(--dur-base) var(--ease),
              background-color var(--dur-base) var(--ease);
}
.portfolio-dot:hover {
  opacity: 0.8;
}
.portfolio-dot.is-active {
  background: var(--color-ink);
  opacity: 1;
  transform: scale(1.4);
}

/* ---------- Contacto ---------- */
#contacto {
  background: var(--color-bg-alt);
}
.contacto-wrap {
  max-width: 540px;
  margin: 0 auto;
  text-align: center;
}
.contacto-wrap p {
  margin-inline: auto;
}
.contacto-intro {
  color: var(--color-ink-soft);
  margin-bottom: var(--space-4);
}
.contacto-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}
.contacto-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  font-size: 0.95rem;
  color: var(--color-ink-soft);
}
.contacto-details a {
  color: var(--color-ink);
  transition: color var(--dur-base) var(--ease);
}
.contacto-details a:hover {
  color: var(--color-accent);
}

.whatsapp-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.5rem;
  background: var(--color-bg);
  color: var(--color-ink);
  border: 1px solid var(--color-line-strong);
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: transform var(--dur-base) var(--ease),
              background-color var(--dur-base) var(--ease),
              border-color var(--dur-base) var(--ease),
              color var(--dur-base) var(--ease),
              box-shadow var(--dur-base) var(--ease);
}
.whatsapp-button:hover {
  background: var(--color-ink);
  border-color: var(--color-ink);
  color: var(--color-bg);
  transform: translateY(-3px);
  box-shadow: 0 10px 24px -14px rgba(20, 20, 19, 0.4);
}
.whatsapp-button svg {
  width: 18px;
  height: 18px;
}

/* ---------- Footer ---------- */
.footer {
  padding: var(--space-5) var(--space-3) var(--space-3);
  background: var(--color-bg);
  border-top: 1px solid var(--color-line);
}
.footer-container {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  text-align: center;
}
.footer-brand {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-ink);
  letter-spacing: -0.01em;
}
.footer-social {
  display: flex;
  gap: var(--space-1);
}
.footer-social a {
  display: inline-flex;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--color-line);
  color: var(--color-ink-soft);
  transition: transform var(--dur-base) var(--ease),
              color var(--dur-base) var(--ease),
              border-color var(--dur-base) var(--ease);
}
.footer-social a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-3px);
}
.footer-bottom {
  font-size: 0.8125rem;
  color: var(--color-ink-mute);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  align-items: center;
}
.footer-bottom a {
  transition: color var(--dur-base) var(--ease);
}
.footer-bottom a:hover {
  color: var(--color-ink);
}
.footer-bottom .sep {
  opacity: 0.5;
}

/* =========================================================
   Breakpoints — mobile-first
   ========================================================= */

/* ≥ 640px ── small tablets */
@media (min-width: 640px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }
  .contacto-buttons {
    flex-direction: row;
    justify-content: center;
  }
}

/* ≥ 768px ── tablets */
@media (min-width: 768px) {
  section {
    padding-block: var(--space-7);
  }
  .container {
    padding-inline: var(--space-4);
  }
  .navbar {
    padding: var(--space-2) var(--space-4);
  }
  .navbar-nav {
    display: flex;
  }
  .mobile-menu-toggle {
    display: none;
  }
  .filosofia-content {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
  }
  .footer-container {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
  .portfolio-track {
    padding-inline: calc(50% - 27.5%);
    gap: var(--space-3);
  }
  .portfolio-slide {
    flex: 0 0 55%;
  }
}

/* ≥ 1024px ── desktop */
@media (min-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .portfolio-track {
    padding-inline: calc(50% - 22.5%);
  }
  .portfolio-slide {
    flex: 0 0 45%;
  }
}

/* ---------- Menú móvil ---------- */
@media (max-width: 767px) {
  .navbar-nav {
    position: absolute;
    inset: 100% 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-2);
    background: rgba(250, 249, 245, 0.98);
    border-bottom: 1px solid var(--color-line);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--dur-base) var(--ease),
                opacity var(--dur-base) var(--ease);
  }
  .navbar-nav.active {
    display: flex;
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-link {
    display: block;
    padding: 0.75rem 1rem;
    border-radius: 6px;
  }
  .nav-link::after {
    display: none;
  }
  .nav-link:hover,
  .nav-link.active {
    background: var(--color-line);
  }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .portfolio-track {
    scroll-behavior: auto;
  }
  .portfolio-slide {
    transform: none;
    opacity: 1;
  }
}