/* Big 5 ENERGY Base Styles v2 - Mobile-first */

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

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-relaxed);
  color: var(--color-text-body);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Body scroll lock per overlay menu */
body.menu-open {
  overflow: hidden;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-heading);
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--lh-tight);
  letter-spacing: -0.015em;
  text-wrap: balance;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); font-weight: 600; line-height: var(--lh-snug); }
h4 { font-size: var(--fs-h4); font-weight: 600; }

p {
  color: var(--color-text-body);
  line-height: var(--lh-relaxed);
  text-wrap: pretty;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) ease;
}

a:hover {
  color: var(--color-primary-dark);
}

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

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

/* Container mobile-first */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-4);
}

@media (min-width: 480px) {
  .container { padding: 0 var(--sp-5); }
}

@media (min-width: 768px) {
  .container { padding: 0 var(--sp-8); }
}

@media (min-width: 1024px) {
  .container { padding: 0 var(--sp-10); }
}

@media (min-width: 1536px) {
  .container { max-width: var(--container-max-2xl); }
}

/* Section padding mobile-first */
.section {
  padding: var(--sp-12) 0;
}

@media (min-width: 768px) {
  .section { padding: var(--sp-20) 0; }
}

@media (min-width: 1024px) {
  .section { padding: var(--sp-20) 0; }
}

/* Sezioni di raccordo / contenuto leggero: meno vuoto verticale */
.section-compact { padding: var(--sp-10) 0; }
@media (min-width: 768px) {
  .section-compact { padding: var(--sp-12) 0; }
}
@media (min-width: 1024px) {
  .section-compact { padding: var(--sp-16) 0; }
}

/* La prima sezione subito dopo una hero interna non raddoppia il vuoto */
.hero-internal + .section,
.hero-internal + .section-compact {
  padding-top: var(--sp-10);
}
@media (min-width: 1024px) {
  .hero-internal + .section,
  .hero-internal + .section-compact {
    padding-top: var(--sp-12);
  }
}

.section-alt {
  background: var(--color-surface-alt);
}

.section-dark {
  background: var(--color-surface-dark);
  color: var(--color-text-inverse);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--color-text-inverse);
}

/* Label */
.label {
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* 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;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 8px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-md);
  font-weight: 600;
  z-index: 9999;
  transition: top var(--duration-fast) ease;
}

.skip-link:focus {
  top: 8px;
  color: var(--color-text-inverse);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Selection */
::selection {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}