/* ============================================
   CIS Tecnologia — Base Styles
   Reset, typography, utilities
   ============================================ */

/* --- 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-body);
  font-size: var(--text-base);
  font-weight: var(--fw-regular);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--duration-fast) var(--ease-out); }
a:hover { color: var(--color-primary-light); }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }
::selection { background: var(--color-primary); color: #fff; }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--fw-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
}
h1 { font-size: var(--text-5xl); font-weight: var(--fw-extrabold); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }
p { margin-bottom: var(--space-4); line-height: var(--leading-normal); }
p:last-child { margin-bottom: 0; }

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}
.container--narrow { max-width: var(--container-lg); }
.container--wide { max-width: var(--container-2xl); }

.section { padding: var(--space-20) 0; }
.section--sm { padding: var(--space-12) 0; }
.section--lg { padding: var(--space-24) 0; }
.section--alt { background-color: var(--color-bg-alt); }
.section--dark { background-color: var(--color-bg-dark); color: var(--color-text-inverse); }
.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4 { color: var(--color-text-inverse); }
.section--primary { background-color: var(--color-primary); color: var(--color-text-inverse); }
.section--primary h2, .section--primary h3 { color: var(--color-text-inverse); }

/* --- Grid --- */
.grid { display: grid; gap: var(--space-8); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1024px) { .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; } }
@media (max-width: 640px) { .container { padding-left: 28px; padding-right: 28px; } }

/* --- Flex --- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  font-family: var(--font-heading); font-size: var(--text-sm); font-weight: var(--fw-semibold);
  letter-spacing: var(--tracking-wide); text-transform: uppercase;
  border: 2px solid transparent; border-radius: var(--radius-md);
  transition: all var(--duration-base) var(--ease-out);
  text-decoration: none; white-space: nowrap; min-height: 48px;
}
.btn--primary { background: var(--color-cta); color: #fff; border-color: var(--color-cta); }
.btn--primary:hover { background: var(--color-cta-hover); border-color: var(--color-cta-hover); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn--secondary { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn--secondary:hover { background: var(--color-primary); color: #fff; transform: translateY(-2px); }
.btn--blue { background: var(--color-primary-light); color: #fff; border-color: var(--color-primary-light); }
.btn--blue:hover { background: var(--color-primary); border-color: var(--color-primary); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn--white { background: #fff; color: var(--color-primary); border-color: #fff; }
.btn--white:hover { background: transparent; color: #fff; border-color: #fff; }
.btn--ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,0.3); }
.btn--ghost:hover { background: rgba(255,255,255,0.1); border-color: #fff; color: #fff; }
.btn--lg { padding: var(--space-4) var(--space-10); font-size: var(--text-base); min-height: 56px; }
.btn--sm { padding: var(--space-2) var(--space-5); font-size: var(--text-xs); min-height: 40px; }
.btn--whatsapp { background: #25D366; color: #fff; border-color: #25D366; }
.btn--whatsapp:hover { background: #20BD5A; border-color: #20BD5A; color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(37,211,102,0.3); }

/* --- Cards --- */
.card {
  background: var(--color-bg-white); border-radius: var(--radius-lg);
  padding: var(--space-8); box-shadow: var(--shadow-card);
  transition: all var(--duration-base) var(--ease-out);
}
.card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-4px); }

/* --- Section Headers --- */
.section-header { text-align: center; max-width: 720px; margin: 0 auto var(--space-12); }
.section-header__label {
  display: inline-block; font-family: var(--font-heading);
  font-size: var(--text-xs); font-weight: var(--fw-bold);
  letter-spacing: var(--tracking-wider); text-transform: uppercase;
  color: var(--color-primary-light); margin-bottom: var(--space-3);
}
.section--dark .section-header__label, .section--primary .section-header__label { color: var(--color-cta-light); }
.section-header__title { margin-bottom: var(--space-4); }
.section-header__desc { font-size: var(--text-lg); color: var(--color-text-secondary); line-height: var(--leading-relaxed); }
.section--dark .section-header__desc { color: var(--color-text-on-dark); }

/* --- Divider --- */
.divider { width: 60px; height: 3px; background: var(--color-primary); border-radius: var(--radius-full); margin: var(--space-6) 0; }
.divider--center { margin-left: auto; margin-right: auto; }

/* --- Scroll Reveal --- */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity var(--duration-reveal) var(--ease-out), transform var(--duration-reveal) var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal--delay-1 { transition-delay: 100ms; }
.reveal--delay-2 { transition-delay: 200ms; }
.reveal--delay-3 { transition-delay: 300ms; }
.reveal--delay-4 { transition-delay: 400ms; }

/* --- Accessibility --- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
:focus-visible { outline: 2px solid var(--color-primary-light); outline-offset: 2px; }

/* --- Utilities --- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }