/* ═══════════════════════════════════════════════════════
   UltraSinergia — Base Styles
   ═══════════════════════════════════════════════════════ */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-body);
  font-weight: var(--fw-regular);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--text-secondary);
  background-color: var(--bg-main);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input, textarea, select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

ul, ol {
  list-style: none;
}

::selection {
  background: var(--accent-cyan);
  color: var(--bg-main);
}

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  line-height: var(--lh-heading);
  letter-spacing: var(--ls-tight);
}

h1 { font-size: var(--fs-h1); font-weight: var(--fw-black); }
h2 { font-size: var(--fs-h2); font-weight: var(--fw-bold); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); }

p {
  line-height: var(--lh-body);
  color: var(--text-secondary);
}

strong { font-weight: var(--fw-semibold); color: var(--text-primary); }

.text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-accent { color: var(--accent-cyan); }
.text-magenta { color: var(--accent-magenta); }

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

/* ── Section ── */
.section {
  padding-block: var(--space-24);
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .section { padding-block: var(--space-32); }
}

/* ── Section Label ── */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--fs-label);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-ultra);
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: var(--space-4);
}

.section-label::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
}

/* ── Utilities ── */
.hidden-mobile {
  display: inline;
}

@media (max-width: 768px) {
  .hidden-mobile { display: none; }
}

.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;
}

.grid-lines {
  background-image:
    linear-gradient(var(--border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
  background-size: 60px 60px;
}

.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slower) var(--ease-out-expo),
              transform var(--duration-slower) var(--ease-out-expo);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity var(--duration-slower) var(--ease-out-expo),
              transform var(--duration-slower) var(--ease-out-expo);
}

.reveal-left.revealed {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity var(--duration-slower) var(--ease-out-expo),
              transform var(--duration-slower) var(--ease-out-expo);
}

.reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}

.delay-1 { transition-delay: 100ms; }
.delay-2 { transition-delay: 200ms; }
.delay-3 { transition-delay: 300ms; }
.delay-4 { transition-delay: 400ms; }