:root {
    --concept-gold: #c79a4b;
    --concept-gold-dark: #a87f3b;
    --concept-bg-top: #f5f4f1;
    --concept-bg-bottom: #eae3d7;
    --concept-surface: rgba(255, 255, 255, 0.62);
    --concept-surface-border: rgba(199, 154, 75, 0.18);
    --concept-text: #201a16;
    --concept-text-soft: rgba(32, 26, 22, 0.76);
    --concept-shadow: 0 18px 50px rgba(50, 37, 22, 0.08);
    --concept-radius-xl: 28px;
    --concept-radius-lg: 22px;
    --concept-container: 1240px;
    --concept-transition: 320ms ease;
  }
  
  .concept {
    position: relative;
    overflow: hidden;
    padding: clamp(60px, 10vw, 100px) 0;
    background:
      linear-gradient(180deg, var(--concept-bg-top) 0%, var(--concept-bg-bottom) 100%);
  }
  
  .concept__container {
    position: relative;
    z-index: 2;
    width: min(100% - 32px, var(--concept-container));
    margin: 0 auto;
  }
  
  .concept__intro {
    max-width: 760px;
    margin: 0 auto 48px;
    text-align: center;
  }
  
  .concept__eyebrow {
    margin: 0 0 14px;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--concept-gold-dark);
  }
  
  .concept__title {
    margin: 0 0 18px;
    font-family: "Cormorant Garamond", serif;
    font-size: clamp(2.2rem, 4vw, 4rem);
    line-height: 0.98;
    font-weight: 600;
    letter-spacing: -0.03em;
    color: var(--concept-text);
    text-wrap: balance;
  }
  
  .concept__text {
    margin: 0 auto;
    font-size: clamp(1rem, 1.2vw, 1.08rem);
    line-height: 1.8;
    color: var(--concept-text);
    text-wrap: balance;
  }
  
  .concept__text + .concept__text {
    margin-top: 12px;
  }
  
  .concept__text--soft {
    color: var(--concept-text-soft);
  }
  
  .concept__grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
    align-items: stretch;
  }
  
  .concept-card {
    position: relative;
    min-height: 100%;
    padding: 28px 24px 24px;
    border-radius: var(--concept-radius-lg);
    background: var(--concept-surface);
    border: 1px solid var(--concept-surface-border);
    box-shadow: var(--concept-shadow);
    backdrop-filter: blur(12px);
  
    transition:
      transform var(--concept-transition),
      border-color var(--concept-transition),
      box-shadow var(--concept-transition),
      background-color var(--concept-transition);
  }
  
  .concept-card:hover,
  .concept-card:focus-visible {
    transform: translateY(-8px);
    border-color: rgba(199, 154, 75, 0.42);
    box-shadow: 0 24px 60px rgba(50, 37, 22, 0.12);
    background: rgba(255, 255, 255, 0.78);
    outline: none;
  }
  
  .concept-card__icon {
    width: 68px;
    height: 68px;
    margin-bottom: 18px;
    border-radius: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--concept-gold);
    background:
      linear-gradient(180deg, rgba(199, 154, 75, 0.12) 0%, rgba(199, 154, 75, 0.04) 100%);
    border: 1px solid rgba(199, 154, 75, 0.16);
  }
  
  .concept-card__icon svg {
    width: 34px;
    height: 34px;
  }
  
  .concept-card__title {
    margin: 0 0 10px;
    font-size: 1.08rem;
    line-height: 1.35;
    font-weight: 600;
    color: var(--concept-text);
  }
  
  .concept-card__text {
    margin: 0;
    font-size: 0.96rem;
    line-height: 1.7;
    color: var(--concept-text-soft);
  }
  
  /* Background decorativo */
  .concept__bg-shape {
    position: absolute;
    border-radius: 999px;
    pointer-events: none;
    filter: blur(8px);
    opacity: 0.65;
  }
  
  .concept__bg-shape--one {
    top: -120px;
    left: -80px;
    width: 360px;
    height: 360px;
    background:
      radial-gradient(circle, rgba(199, 154, 75, 0.14) 0%, rgba(199, 154, 75, 0.02) 65%, transparent 100%);
  }
  
  .concept__bg-shape--two {
    right: -120px;
    bottom: -140px;
    width: 420px;
    height: 420px;
    background:
      radial-gradient(circle, rgba(255, 255, 255, 0.45) 0%, rgba(255, 255, 255, 0.04) 60%, transparent 100%);
  }
  
  /* Reveal on scroll */
  .reveal-up {
    opacity: 0;
    transform: translateY(32px);
    transition:
      opacity 700ms ease,
      transform 700ms ease;
    will-change: opacity, transform;
  }
  
  .reveal-up.is-visible {
    opacity: 1;
    transform: translateY(0);
  }
  
  .concept-card.reveal-up:nth-child(1) {
    transition-delay: 80ms;
  }
  
  .concept-card.reveal-up:nth-child(2) {
    transition-delay: 160ms;
  }
  
  .concept-card.reveal-up:nth-child(3) {
    transition-delay: 240ms;
  }
  
  .concept-card.reveal-up:nth-child(4) {
    transition-delay: 320ms;
  }
  
  /* Responsivo */
  @media (max-width: 1100px) {
    .concept__grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
  }
  
  @media (max-width: 768px) {
    .concept {
      padding: 72px 0;
    }
  
    .concept__container {
      width: min(100% - 24px, var(--concept-container));
    }
  
    .concept__intro {
      margin-bottom: 32px;
    }
  
    .concept__title {
      font-size: clamp(2rem, 9vw, 3rem);
    }
  
    .concept__text {
        line-height: 1.7;
    }
  
    .concept__grid {
      grid-template-columns: 1fr;
      gap: 16px;
    }
  
    .concept-card {
      padding: 24px 20px 20px;
      border-radius: 20px;
    }
  
    .concept-card__icon {
      width: 60px;
      height: 60px;
      margin-bottom: 16px;
      border-radius: 16px;
    }
  
    .concept-card__icon svg {
      width: 30px;
      height: 30px;
    }
  }
  
  @media (prefers-reduced-motion: reduce) {
    .reveal-up,
    .concept-card {
      transition: none;
    }
  
    .reveal-up {
      opacity: 1;
      transform: none;
    }
  }