/* ═══════════════════════════════════════════════════════════════
   idi Ingegneria degli Idrocarburi — style_new.css
   Nuovo design system per homepage e layout globale
   Da includere in index.php DOPO il link a style.css esistente
   ═══════════════════════════════════════════════════════════════ */

/* ── Google Fonts (Barlow) ── */
@import url('https://fonts.googleapis.com/css2?family=Barlow:wght@300;400;500;600&family=Barlow+Condensed:wght@400;500;600;700&display=swap');

/* ── CSS Variables ── */
:root {
  --idi-navy:       #0b1f3a;
  --idi-navy-mid:   #122a50;
  --idi-blue:       #1a5fa8;
  --idi-blue-light: #2b7fd4;
  --idi-accent:     #e07b2a;
  --idi-steel:      #4a6278;
  --idi-light:      #f4f6f9;
  --idi-white:      #ffffff;
  --idi-text:       #1c2b3a;
  --idi-muted:      #6b7f92;
  --idi-border:     rgba(255,255,255,0.08);
}

nav { all: unset; }
body { all: unset; }
card { all: unset; }

/* ── Reset base ── */
*, *::before, *::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: 'Barlow', sans-serif;
  color: var(--idi-text);
  background: var(--idi-white);
  overflow-x: hidden;
  margin: 0;
  padding: 0;
}


/* ════════════════════════════════
   NAVBAR
   ════════════════════════════════ */
.idi-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  height: 72px;
  background: rgba(11,31,58,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--idi-border);
}

.idi-nav__logo {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 26px;
  font-weight: 700;
  color: var(--idi-white);
  letter-spacing: 2px;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 4px;
}
.idi-nav__logo img {
  height: 38px;
  width: auto;
  filter: brightness(0) invert(1);
}
.idi-nav__logo span { color: var(--idi-accent); }

.idi-nav__links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.idi-nav__links a {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.72);
  text-decoration: none;
  transition: color 0.2s;
}
.idi-nav__links a:hover,
.idi-nav__links a.active { color: var(--idi-white); }

.idi-nav__lang {
  display: flex;
  gap: 10px;
  align-items: center;
}
.idi-nav__lang a {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  color: rgba(255,255,255,0.45);
  text-decoration: none;
  transition: color 0.2s;
}
.idi-nav__lang a.active { color: var(--idi-accent); }
.idi-nav__lang a:hover  { color: var(--idi-white); }
.idi-nav__lang .sep {
  color: rgba(255,255,255,0.2);
  font-size: 12px;
}

/* Hamburger mobile */
.idi-nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.idi-nav__burger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--idi-white);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ════════════════════════════════
   HERO
   ════════════════════════════════ */
.idi-hero {
  position: relative;
  height: 100vh;
  min-height: 640px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  padding-top: 72px; /* compensa la navbar fissa */
}

/* griglia geometrica overlay */
.idi-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 1;
  pointer-events: none;
}

.idi-hero__slides {
  position: absolute;
  inset: 0;
}
.idi-hero__slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1.2s ease;
}
.idi-hero__slide.active { opacity: 1; }
.idi-hero__slide::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(11,31,58,0.88) 0%,
    rgba(11,31,58,0.52) 55%,
    rgba(11,31,58,0.2) 100%
  );
}

.idi-hero__content {
  position: relative;
  z-index: 2;
  padding: 0 48px 80px;
  max-width: 720px;
}

.idi-hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(224,123,42,0.15);
  border: 1px solid rgba(224,123,42,0.4);
  color: var(--idi-accent);
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 2px;
  margin-bottom: 24px;
  animation: idiFloatUp 0.8s 0.2s both;
}
.idi-hero__tag::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--idi-accent);
  border-radius: 50%;
  flex-shrink: 0;
}

.idi-hero__title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: clamp(42px, 6vw, 76px);
  font-weight: 600;
  line-height: 1.05;
  color: var(--idi-white);
  letter-spacing: -0.5px;
  margin: 0 0 20px;
  animation: idiFloatUp 0.8s 0.4s both;
}
.idi-hero__title em {
  font-style: normal;
  color: var(--idi-accent);
}

.idi-hero__lead {
  font-size: 17px;
  font-weight: 300;
  line-height: 1.75;
  color: rgba(255,255,255,0.72);
  max-width: 520px;
  margin: 0 0 36px;
  animation: idiFloatUp 0.8s 0.6s both;
}

.idi-hero__ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: idiFloatUp 0.8s 0.8s both;
}

/* slide dots */
.idi-hero__dots {
  position: absolute;
  bottom: 36px;
  right: 48px;
  z-index: 3;
  display: flex;
  gap: 10px;
}
.idi-hero__dot {
  width: 28px; height: 3px;
  background: rgba(255,255,255,0.3);
  cursor: pointer;
  border-radius: 2px;
  transition: background 0.3s, width 0.3s;
  border: none;
  padding: 0;
}
.idi-hero__dot.active { background: var(--idi-accent); width: 44px; }

/* scroll hint */
.idi-hero__scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.38);
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: idiFadeIn 1.5s 1.2s both;
}
.idi-hero__scroll::after {
  content: '';
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.38), transparent);
  animation: idiScrollLine 2s ease infinite;
}

/* ════════════════════════════════
   STATS BAR
   ════════════════════════════════ */
.idi-stats {
  background: var(--idi-navy);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.idi-stats__item {
  padding: 32px 24px;
  text-align: center;
  border-right: 1px solid var(--idi-border);
}
.idi-stats__item:last-child { border-right: none; }

.idi-stats__num {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 48px;
  font-weight: 700;
  color: var(--idi-white);
  line-height: 1;
  display: block;
}
.idi-stats__num em {
  font-style: normal;
  color: var(--idi-accent);
}
.idi-stats__label {
  font-size: 12px;
  font-weight: 400;
  color: rgba(255,255,255,0.48);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-top: 6px;
  display: block;
}

/* ════════════════════════════════
   UTILITIES CONDIVISE
   ════════════════════════════════ */
.idi-section {
  padding: 96px 48px;
}
.idi-section--light { background: var(--idi-light); }
.idi-section--dark  { background: var(--idi-navy); }

.idi-inner {
  max-width: 1400px;
  margin: 0 auto;
}

.idi-section-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--idi-blue);
  margin-bottom: 14px;
}
.idi-section-tag::before {
  content: '';
  display: block;
  width: 24px; height: 2px;
  background: var(--idi-accent);
  flex-shrink: 0;
}
.idi-section--dark .idi-section-tag { color: rgba(255,255,255,0.45); }

.idi-section-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--idi-navy);
  letter-spacing: -0.3px;
  margin: 0 0 48px;
}
.idi-section--dark .idi-section-title { color: var(--idi-white); }

/* Bottoni */
.idi-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  text-decoration: none;
  padding: 13px 26px;
  border-radius: 5px;
  transition: background 0.2s, transform 0.15s, border-color 0.2s;
  cursor: pointer;
  border: none;
}
.idi-btn:hover { transform: translateY(-1px); }

.idi-btn--accent {
  background: var(--idi-accent);
  color: var(--idi-white);
}
.idi-btn--accent:hover { background: #c96a1c; color: var(--idi-white); }

.idi-btn--dark {
  background: var(--idi-navy);
  color: var(--idi-white);
}
.idi-btn--dark:hover { background: var(--idi-navy-mid); }

.idi-btn--outline {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.35);
  color: var(--idi-white);
}
.idi-btn--outline:hover { border-color: white; background: rgba(255,255,255,0.08); }

.idi-btn--text {
  background: transparent;
  color: var(--idi-blue);
  padding-left: 0;
  padding-right: 0;
  border-bottom: 1px solid transparent;
  border-radius: 0;
}
.idi-btn--text:hover { border-color: var(--idi-blue); transform: none; }

/* Scroll reveal */
.idi-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.idi-reveal.visible {
  opacity: 1;
  transform: none;
}
.idi-reveal--delay1 { transition-delay: 0.1s; }
.idi-reveal--delay2 { transition-delay: 0.2s; }
.idi-reveal--delay3 { transition-delay: 0.3s; }

/* ════════════════════════════════
   CHI SIAMO
   ════════════════════════════════ */
.idi-about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.idi-about__visual { position: relative; }

.idi-about__img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: 5px;
  display: block;
}

.idi-about__cert {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: var(--idi-white);
  border: 1px solid #e2e8ef;
  border-radius: 4px;
  padding: 16px 20px;
  box-shadow: 0 8px 32px rgba(11,31,58,0.12);
  display: flex;
  align-items: center;
  gap: 12px;
}
.idi-about__cert-icon {
  width: 36px; height: 36px;
  background: var(--idi-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
  font-weight: 700;
  font-family: 'Barlow Condensed', sans-serif;
  flex-shrink: 0;
}
.idi-about__cert-text {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: var(--idi-navy);
  line-height: 1.4;
}
.idi-about__cert-text small {
  display: block;
  font-weight: 400;
  color: var(--idi-muted);
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.idi-about__text p {
  font-size: 16px;
  font-weight: 300;
  line-height: 1.85;
  color: #3d5168;
  margin: 0 0 16px;
}

.idi-ati {
  background: var(--idi-light);
  border-left: 3px solid var(--idi-accent);
  border-radius: 0 4px 4px 0;
  padding: 20px 24px;
  margin-top: 28px;
}
.idi-ati__label {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--idi-accent);
  margin-bottom: 6px;
}
.idi-ati p {
  font-size: 14px;
  color: var(--idi-steel);
  margin: 0;
  line-height: 1.65;
}
.idi-ati a { color: var(--idi-blue); text-decoration: none; font-weight: 500; }

.idi-about__ctas {
  display: flex;
  gap: 16px;
  margin-top: 36px;
  flex-wrap: wrap;
  align-items: center;
}

/* ════════════════════════════════
   SERVIZI
   ════════════════════════════════ */
.idi-services__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 56px;
}
.idi-services__header .idi-section-title { margin-bottom: 0; }

.idi-services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.idi-service-card {
  background: var(--idi-white);
  padding: 40px 36px;
  position: relative;
  cursor: pointer;
  transition: background 0.25s;
  border-top: 3px solid transparent;
  text-decoration: none;
  display: block;
  color: inherit;
  margin: 5px;
  border-radius: 5px;
}
.idi-service-card:hover {
  background: var(--idi-navy);
  border-top-color: var(--idi-accent);
  text-decoration: none;
}
.idi-service-card:hover .idi-service-card__num   { color: rgba(255,255,255,0.1); }
.idi-service-card:hover .idi-service-card__icon  { background: rgba(224,123,42,0.15); }
.idi-service-card:hover .idi-service-card__title { color: white; }
.idi-service-card:hover .idi-service-card__desc  { color: rgba(255,255,255,0.6); }
.idi-service-card:hover .idi-service-card__link  { color: var(--idi-accent); }

.idi-service-card__num {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 56px;
  font-weight: 700;
  color: rgba(11,31,58,0.06);
  position: absolute;
  top: 18px; right: 24px;
  line-height: 1;
  transition: color 0.25s;
  pointer-events: none;
}
.idi-service-card__icon {
  width: 44px; height: 44px;
  background: rgba(26,95,168,0.08);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 20px;
  transition: background 0.25s;
}
.idi-service-card__title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--idi-navy);
  letter-spacing: 0.3px;
  margin: 0 0 12px;
  transition: color 0.25s;
}
.idi-service-card__desc {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--idi-muted);
  margin: 0 0 20px;
  transition: color 0.25s;
}
.idi-service-card__link {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--idi-blue);
  transition: color 0.25s;
}

/* ════════════════════════════════
   SETTORI
   ════════════════════════════════ */
.idi-sectors__grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
}

.idi-sector-item {
  background: rgba(255,255,255,0.04);
  padding: 32px 12px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
  transition: background 0.2s, border-color 0.2s;
}
.idi-sector-item:hover {
  background: rgba(224,123,42,0.12);
  border-color: rgba(224,123,42,0.3);
}
.idi-sector-item:hover .idi-sector-item__name { color: var(--idi-accent); }

.idi-sector-item__icon {
  font-size: 28px;
  display: block;
  margin-bottom: 12px;
}
.idi-sector-item__name {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  transition: color 0.2s;
}

/* ════════════════════════════════
   REFERENZE — logo scroll
   ════════════════════════════════ */
.idi-references {
  padding: 72px 48px;
  background: var(--idi-white);
  overflow: hidden;
}

.idi-logos-track {
  position: relative;
  overflow: hidden;
}
.idi-logos-track::before,
.idi-logos-track::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  width: 100px;
  z-index: 2;
  pointer-events: none;
}
.idi-logos-track::before { left: 0;  background: linear-gradient(to right, var(--idi-white), transparent); }
.idi-logos-track::after  { right: 0; background: linear-gradient(to left,  var(--idi-white), transparent); }

.idi-logos-scroll {
  display: flex;
  animation: idiScrollLogos 40s linear infinite;
  will-change: transform;
}
.idi-logos-scroll:hover { animation-play-state: paused; }

.idi-logo-item {
  flex-shrink: 0;
  width: 160px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-right: 1px solid #eef2f6;
  padding: 0 20px;
}
.idi-logo-item span {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--idi-muted);
  text-transform: uppercase;
  white-space: nowrap;
  transition: color 0.2s;
}
.idi-logo-item:hover span { color: var(--idi-navy); opacity: 0.5;}

/* ════════════════════════════════
   FOOTER
   ════════════════════════════════ */
.idi-footer {
  background: var(--idi-navy);
  padding: 64px 48px 32px;
  border-top: 1px solid var(--idi-border);
}

.idi-footer__grid {
  max-width: 1400px;
  margin: 0 auto 48px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.idi-footer__brand p {
  font-size: 14px;
  font-weight: 300;
  line-height: 1.75;
  color: rgba(255,255,255,0.42);
  margin: 12px 0 16px;
}
.idi-footer__brand a.idi-footer__email {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  transition: color 0.2s;
}
.idi-footer__brand a.idi-footer__email:hover { color: var(--idi-accent); }

.idi-footer__col h4 {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  margin: 0 0 18px;
}
.idi-footer__col ul {
  list-style: none;
  padding: 0; margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.idi-footer__col ul a {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  transition: color 0.2s;
}
.idi-footer__col ul a:hover { color: var(--idi-white); }

.idi-footer__bottom {
  max-width: 1400px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--idi-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.idi-footer__bottom p {
  font-size: 12px;
  color: rgba(255,255,255,0.28);
  letter-spacing: 0.5px;
  margin: 0;
}
.idi-footer__bottom-links {
  display: flex;
  gap: 20px;
}
.idi-footer__bottom-links a {
  font-size: 12px;
  color: rgba(255,255,255,0.35);
  text-decoration: none;
  transition: color 0.2s;
}
.idi-footer__bottom-links a:hover { color: rgba(255,255,255,0.7); }

/* Logo footer */
.idi-footer__logo {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 26px;
  font-weight: 700;
  color: var(--idi-white);
  letter-spacing: 2px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.idi-footer__logo img {
  height: 34px;
  filter: brightness(0) invert(1);
}
.idi-footer__logo span { color: var(--idi-accent); }

/* ════════════════════════════════
   KEYFRAMES
   ════════════════════════════════ */
@keyframes idiFloatUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes idiFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes idiScrollLine {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}
@keyframes idiScrollLogos {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ════════════════════════════════
   RESPONSIVE
   ════════════════════════════════ */
@media (max-width: 1200px) {
  .idi-sectors__grid { grid-template-columns: repeat(4, 1fr); }
  .idi-footer__grid  { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 1024px) {
  .idi-nav { padding: 0 24px; }
  .idi-nav__links { gap: 20px; }
  .idi-section { padding: 64px 24px; }
  .idi-about  { grid-template-columns: 1fr; gap: 48px; }
  .idi-about__cert { right: 0; }
  .idi-services__grid { grid-template-columns: repeat(2, 1fr); }
  .idi-stats { grid-template-columns: repeat(2, 1fr); }
  .idi-references { padding: 64px 24px; }
  .idi-footer { padding: 48px 24px 24px; }
}

@media (max-width: 768px) {
  .idi-nav__links { display: none; }
  .idi-nav__burger { display: flex; }
  .idi-hero__content { padding: 0 24px 64px; }
  .idi-hero__dots  { right: 24px; }
  .idi-services__grid { grid-template-columns: 1fr; }
  .idi-sectors__grid  { grid-template-columns: repeat(3, 1fr); }
  .idi-footer__grid   { grid-template-columns: 1fr; gap: 28px; }
  .idi-services__header { flex-direction: column; align-items: flex-start; gap: 16px; }
}

@media (max-width: 480px) {
  .idi-sectors__grid { grid-template-columns: repeat(2, 1fr); }
  .idi-stats { grid-template-columns: 1fr 1fr; }
  .idi-stats__num { font-size: 36px; }
  .idi-nav__logo img { max-width: 260px;}
}

body.page-not-home { padding-top: 72px; }