/* =========================================================
   STONE EMPREENDIMENTOS — DESIGN TOKENS
   ========================================================= */

:root {
  /* Cores da marca */
  --stone-red: #C71E24;
  --stone-red-dark: #9E1419;
  --stone-red-light: #E84C44;

  --stone-charcoal: #1B1D1F;
  --stone-charcoal-soft: #2A2D2F;

  --stone-gray: #6B6E6E;
  --stone-gray-light: #9A9C9C;

  --stone-bg: #F7F5F2;
  --stone-bg-alt: #EFEBE6;
  --stone-line: #E2DED8;

  --stone-bronze: #B08D57;
  --stone-bronze-light: #D4B98C;

  --stone-white: #FFFFFF;

  /* Texto */
  --text-primary: #1B1D1F;
  --text-secondary: #5C5E5E;
  --text-muted: #8A8C8B;
  --text-on-dark: #F4F1EC;
  --text-on-dark-muted: #B8B6B2;

  /* Tipografia */
  --font-display: "Fraunces", "Georgia", serif;
  --font-body: "Inter", -apple-system, "Segoe UI", sans-serif;

  /* Escala tipográfica */
  --fs-hero: clamp(2.6rem, 6vw, 5rem);
  --fs-h1: clamp(2.2rem, 4.5vw, 3.6rem);
  --fs-h2: clamp(1.8rem, 3.2vw, 2.6rem);
  --fs-h3: clamp(1.3rem, 2vw, 1.7rem);
  --fs-lead: clamp(1.05rem, 1.4vw, 1.3rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-eyebrow: 0.8rem;

  /* Espaçamento */
  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1.25rem;
  --space-md: 2rem;
  --space-lg: 3.5rem;
  --space-xl: 5.5rem;
  --space-2xl: 8rem;

  --container-max: 1280px;
  --container-pad: clamp(1.25rem, 4vw, 3rem);

  /* Bordas e sombras */
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 18px;

  --shadow-sm: 0 2px 12px rgba(27, 29, 31, 0.06);
  --shadow-md: 0 12px 40px rgba(27, 29, 31, 0.10);
  --shadow-lg: 0 24px 70px rgba(27, 29, 31, 0.16);

  /* Transições */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --t-fast: 0.2s var(--ease);
  --t-med: 0.45s var(--ease);
  --t-slow: 0.8s var(--ease);

  /* Header */
  --header-h: 92px;
  --header-h-scrolled: 68px;
}

/* =========================================================
   RESET
   ========================================================= */

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.65;
  color: var(--text-primary);
  background: var(--stone-bg);
  -webkit-font-smoothing: antialiased;
}

img, video {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol { padding: 0; margin: 0; list-style: none; }

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

p { margin: 0; }

button { font-family: inherit; cursor: pointer; }

input, select, textarea {
  font-family: inherit;
  font-size: 1rem;
}

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

@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;
  }
}

/* =========================================================
   LAYOUT HELPERS
   ========================================================= */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.section {
  padding: var(--space-2xl) 0;
}

.section--tight {
  padding: var(--space-xl) 0;
}

.section--dark {
  background: var(--stone-charcoal);
  color: var(--text-on-dark);
}

.section--dark h1,
.section--dark h2,
.section--dark h3 {
  color: var(--text-on-dark);
}

.section--alt {
  background: var(--stone-bg-alt);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-body);
  font-size: var(--fs-eyebrow);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--stone-red);
  margin-bottom: var(--space-sm);
}

.eyebrow::before {
  content: "";
  display: block;
  width: 28px;
  height: 2px;
  background: var(--stone-red);
}

.section--dark .eyebrow,
.section--dark .eyebrow::before {
  color: var(--stone-bronze-light);
  background: var(--stone-bronze-light);
}

.section-head {
  max-width: 720px;
  margin-bottom: var(--space-lg);
}

.section-head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.lead {
  font-size: var(--fs-lead);
  color: var(--text-secondary);
  margin-top: var(--space-sm);
}

.section--dark .lead {
  color: var(--text-on-dark-muted);
}

/* =========================================================
   BOTÕES
   ========================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.95rem 2.1rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
  white-space: nowrap;
}

.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--stone-red);
  color: var(--stone-white);
}
.btn--primary:hover {
  background: var(--stone-red-dark);
}

.btn--outline {
  background: transparent;
  color: var(--stone-white);
  border-color: rgba(255,255,255,0.45);
}
.btn--outline:hover {
  background: rgba(255,255,255,0.12);
  border-color: var(--stone-white);
}

.btn--ghost {
  background: transparent;
  color: var(--stone-red);
  border-color: var(--stone-red);
}
.btn--ghost:hover {
  background: var(--stone-red);
  color: var(--stone-white);
}

.btn--dark {
  background: var(--stone-charcoal);
  color: var(--stone-white);
}
.btn--dark:hover {
  background: var(--stone-red);
}

.btn--block { width: 100%; }
.btn--sm { padding: 0.7rem 1.4rem; font-size: 0.85rem; }

/* =========================================================
   ANIMAÇÕES / REVEAL
   ========================================================= */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0.02s; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 0.10s; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 0.18s; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 0.26s; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 0.34s; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 0.42s; }
.reveal-stagger.is-visible > *:nth-child(7) { transition-delay: 0.50s; }
.reveal-stagger.is-visible > *:nth-child(8) { transition-delay: 0.58s; }
.reveal-stagger.is-visible > *:nth-child(9) { transition-delay: 0.66s; }
.reveal-stagger.is-visible > *:nth-child(10) { transition-delay: 0.74s; }

.reveal-stagger.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-stagger > * {
    opacity: 1;
    transform: none;
    transition: none;
  }
}