/* =============================================
   ILIOS ENERGIA SOLAR – Global Styles
   ============================================= */

:root {
  --sun: #F59E0B;
  --sun-dark: #D97706;
  --sun-light: #FEF3C7;
  --green: #059669;
  --green-light: #D1FAE5;
  --dark: #0F172A;
  --dark-2: #1E293B;
  --dark-3: #334155;
  --mid: #64748B;
  --light: #F1F5F9;
  --white: #FFFFFF;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,.08);
  --shadow-lg: 0 16px 48px rgba(0,0,0,.14);
  --transition: .25s ease;
  --max-w: 1200px;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Inter', sans-serif;
  color: var(--dark);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a  { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

/* ── Buttons ─────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-weight: 600;
  font-size: .95rem;
  padding: .75rem 1.75rem;
  border-radius: 50px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn--primary {
  background: var(--sun);
  color: var(--dark);
}
.btn--primary:hover { background: var(--sun-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245,158,11,.4); }

.btn--ghost {
  background: rgba(255,255,255,.15);
  color: var(--white);
  border-color: rgba(255,255,255,.5);
  backdrop-filter: blur(6px);
}
.btn--ghost:hover { background: rgba(255,255,255,.25); }

.btn--outline-nav {
  border-color: var(--sun);
  color: var(--sun);
  padding: .5rem 1.25rem;
}
.btn--outline-nav:hover { background: var(--sun); color: var(--dark); }

.btn--full { width: 100%; justify-content: center; }

/* ── Section Headings ────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}
.section-header h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--dark);
  margin-block: .5rem 1rem;
  line-height: 1.2;
}
.section-header p { color: var(--mid); max-width: 580px; margin-inline: auto; font-size: 1.05rem; }

.section-tag {
  display: inline-block;
  background: var(--sun-light);
  color: var(--sun-dark);
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  padding: .3rem .85rem;
  border-radius: 50px;
}
.section-tag--light {
  background: rgba(255,255,255,.2);
  color: var(--white);
}

/* =============================================
   HEADER
   ============================================= */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(15,23,42,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: background var(--transition);
}
.header.scrolled {
  background: rgba(15,23,42,.97);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 1.5rem;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  color: var(--white);
  font-size: 1.1rem;
  font-weight: 400;
}
.nav__logo strong { font-weight: 800; }
.logo-icon { font-size: 1.5rem; color: var(--sun); }

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav__links a {
  color: rgba(255,255,255,.8);
  font-size: .9rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav__links a:hover { color: var(--sun); }

.nav__toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
  padding: .25rem .5rem;
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--dark);
  z-index: 200;
  padding: 2rem 1.5rem;
  flex-direction: column;
  gap: 2rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu__close {
  align-self: flex-end;
  background: none;
  border: none;
  color: var(--white);
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
}
.mobile-menu ul { display: flex; flex-direction: column; gap: 1.5rem; margin-top: 1rem; }
.mobile-menu a {
  color: var(--white);
  font-size: 1.4rem;
  font-weight: 600;
  border-bottom: 1px solid rgba(255,255,255,.08);
  padding-bottom: 1rem;
  display: block;
}

/* =============================================
   HERO
   ============================================= */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-block: 6rem 4rem;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,23,42,.82) 0%, rgba(15,23,42,.55) 60%, rgba(15,23,42,.4) 100%);
}

.hero__content {
  position: relative;
  z-index: 1;
  color: var(--white);
  max-width: 780px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  background: rgba(245,158,11,.2);
  border: 1px solid rgba(245,158,11,.5);
  color: var(--sun);
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  padding: .35rem 1rem;
  border-radius: 50px;
  margin-bottom: 1.5rem;
}

.hero__title {
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.25rem;
}
.highlight { color: var(--sun); }

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,.85);
  max-width: 620px;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.hero__stats {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}
.stat { text-align: center; }
.stat__num { display: block; font-size: 1.8rem; font-weight: 800; color: var(--sun); }
.stat__label { font-size: .8rem; color: rgba(255,255,255,.7); text-transform: uppercase; letter-spacing: .05em; }
.stat__divider { width: 1px; height: 40px; background: rgba(255,255,255,.2); }

/* =============================================
   SOLUTIONS
   ============================================= */
.solutions {
  padding-block: 5rem;
  background: var(--light);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }

.card--highlight {
  background: var(--dark);
  color: var(--white);
  border: 2px solid var(--sun);
}
.card--highlight h3 { color: var(--sun); }
.card--highlight p, .card--highlight li { color: rgba(255,255,255,.8); }
.card--highlight .card__link { color: var(--sun); }

.card__badge {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: var(--sun);
  color: var(--dark);
  font-size: .7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .05em;
  padding: .2rem .6rem;
  border-radius: 50px;
}

.card__icon { font-size: 2.5rem; margin-bottom: 1rem; }
.card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: .75rem; }
.card p  { color: var(--mid); font-size: .95rem; margin-bottom: 1rem; }

.card__list { display: flex; flex-direction: column; gap: .4rem; margin-bottom: 1.5rem; }
.card__list li {
  font-size: .875rem;
  color: var(--dark-3);
  padding-left: 1.2rem;
  position: relative;
}
.card__list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 700;
}
.card--highlight .card__list li { color: rgba(255,255,255,.75); }

.card__link { font-size: .9rem; font-weight: 600; color: var(--sun-dark); transition: gap var(--transition); }

/* =============================================
   USINAS SECTION
   ============================================= */
.usinas {
  position: relative;
  padding-block: 6rem;
  overflow: hidden;
}
.usinas__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.usinas__bg-img { width: 100%; height: 100%; object-fit: cover; }
.usinas__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(15,23,42,.92) 50%, rgba(15,23,42,.5) 100%);
}

.usinas__content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.usinas__title {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.2;
  margin-block: .75rem 1rem;
}

.usinas__text p {
  color: rgba(255,255,255,.8);
  margin-bottom: 2rem;
  font-size: 1rem;
  line-height: 1.7;
}

.usinas__steps {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.step {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.step__num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: var(--sun);
  color: var(--dark);
  font-weight: 800;
  font-size: .85rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step h4 { color: var(--white); font-size: 1rem; font-weight: 700; margin-bottom: .25rem; }
.step p  { color: rgba(255,255,255,.7); font-size: .9rem; }

.usinas__specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.spec-card {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  backdrop-filter: blur(8px);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: .35rem;
  transition: background var(--transition);
}
.spec-card:hover { background: rgba(245,158,11,.15); border-color: var(--sun); }

.spec-card__icon { font-size: 2rem; }
.spec-card__num  { font-size: 1.8rem; font-weight: 800; color: var(--sun); }
.spec-card__label { font-size: .8rem; color: rgba(255,255,255,.7); text-transform: uppercase; letter-spacing: .05em; }

/* =============================================
   PROJECTS
   ============================================= */
.projects {
  padding-block: 5rem;
  background: var(--white);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.project-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--white);
  transition: transform var(--transition), box-shadow var(--transition);
}
.project-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }

.project-card--featured {
  grid-column: span 1;
  border: 2px solid var(--sun);
}

.project-card__img-wrap {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--light);
}
.project-card__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.project-card:hover .project-card__img-wrap img { transform: scale(1.06); }

/* Placeholder for missing project photos */
.project-card__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--light) 0%, #E2E8F0 100%);
  gap: .5rem;
  color: var(--mid);
  font-size: 2.5rem;
}
.project-card__placeholder p {
  font-size: .9rem;
  color: var(--mid);
  text-align: center;
  font-weight: 600;
  margin: 0;
}
.project-card__placeholder small { font-size: .75rem; font-weight: 400; }

.project-card__tag {
  position: absolute;
  top: .75rem;
  left: .75rem;
  background: var(--sun);
  color: var(--dark);
  font-size: .7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: .25rem .7rem;
  border-radius: 50px;
}

.project-card__info { padding: 1.25rem 1.5rem 1.5rem; }
.project-card__info h3 { font-size: 1rem; font-weight: 700; margin-bottom: .5rem; }
.project-card__info p  { font-size: .875rem; color: var(--mid); margin-bottom: 1rem; line-height: 1.6; }

.project-card__meta {
  display: flex;
  gap: 1rem;
  font-size: .8rem;
  color: var(--dark-3);
  font-weight: 600;
}

/* =============================================
   ADVANTAGES
   ============================================= */
.advantages {
  padding-block: 5rem;
  background: var(--dark);
}
.advantages .section-header h2 { color: var(--white); }
.advantages .section-header p  { color: rgba(255,255,255,.6); }

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.adv-item {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: background var(--transition), border-color var(--transition);
}
.adv-item:hover {
  background: rgba(245,158,11,.08);
  border-color: rgba(245,158,11,.3);
}
.adv-item__icon { font-size: 2.5rem; margin-bottom: 1rem; }
.adv-item h3 { color: var(--white); font-size: 1.05rem; font-weight: 700; margin-bottom: .5rem; }
.adv-item p  { color: rgba(255,255,255,.6); font-size: .9rem; line-height: 1.7; }

/* =============================================
   TESTIMONIALS
   ============================================= */
.testimonials {
  padding-block: 5rem;
  background: var(--light);
}
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.testimonial {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  border-left: 4px solid transparent;
  transition: border-color var(--transition), transform var(--transition);
}
.testimonial:hover { border-left-color: var(--sun); transform: translateY(-4px); }
.testimonial--featured { border-left-color: var(--sun); background: var(--dark); }
.testimonial--featured p, .testimonial--featured footer { color: rgba(255,255,255,.85); }
.testimonial--featured strong { color: var(--sun) !important; }

.testimonial p {
  color: var(--dark-3);
  font-size: .95rem;
  line-height: 1.7;
  font-style: italic;
  margin-bottom: 1.25rem;
}
.testimonial footer { display: flex; flex-direction: column; gap: .2rem; }
.testimonial footer strong { color: var(--dark); font-size: .95rem; }
.testimonial footer span  { color: var(--mid); font-size: .82rem; }

/* =============================================
   CONTACT
   ============================================= */
.contact {
  padding-block: 5rem;
  background: var(--dark-2);
  color: var(--white);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact__text h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1.2;
  margin-block: .75rem 1rem;
}
.contact__text p { color: rgba(255,255,255,.75); line-height: 1.7; margin-bottom: 2rem; }

.contact__items { display: flex; flex-direction: column; gap: 1rem; }

.contact__whatsapp {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: #25D366;
  color: var(--white);
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  max-width: 320px;
}
.contact__whatsapp:hover {
  background: #1ebe59;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37,211,102,.4);
}
.whatsapp-icon { display: flex; align-items: center; }
.whatsapp-label { display: block; font-size: 1rem; }
.whatsapp-sub   { display: block; font-size: .8rem; font-weight: 400; opacity: .85; }

/* Form */
.contact__form {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}
.contact__form h3 {
  color: var(--dark);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  margin-bottom: 1rem;
}
.form-group label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--dark-3);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: .7rem 1rem;
  border: 1.5px solid #CBD5E1;
  border-radius: 8px;
  font-family: inherit;
  font-size: .95rem;
  color: var(--dark);
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--sun);
  box-shadow: 0 0 0 3px rgba(245,158,11,.15);
}
.form-group textarea { resize: vertical; }

.form__note {
  margin-top: .75rem;
  font-size: .78rem;
  color: var(--mid);
  text-align: center;
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,.7);
  padding-top: 3.5rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.footer__brand .nav__logo { margin-bottom: .75rem; }
.footer__brand p { font-size: .875rem; line-height: 1.7; max-width: 280px; }

.footer__links h4,
.footer__contact h4 {
  color: var(--white);
  font-size: .9rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.footer__links ul { display: flex; flex-direction: column; gap: .5rem; }
.footer__links a {
  font-size: .875rem;
  color: rgba(255,255,255,.6);
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--sun); }

.footer__whatsapp {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: #25D366;
  color: var(--white);
  font-size: .875rem;
  font-weight: 600;
  padding: .6rem 1.1rem;
  border-radius: 50px;
  transition: background var(--transition), transform var(--transition);
}
.footer__whatsapp:hover { background: #1ebe59; transform: translateY(-2px); }

.footer__bottom {
  text-align: center;
  padding-block: 1.25rem;
  font-size: .8rem;
  color: rgba(255,255,255,.4);
}

/* =============================================
   FLOATING WHATSAPP BUTTON
   ============================================= */
.whatsapp-float {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 90;
  background: #25D366;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .85rem 1.25rem;
  border-radius: 50px;
  box-shadow: 0 8px 32px rgba(37,211,102,.45);
  font-weight: 700;
  font-size: .9rem;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  animation: pulse-whatsapp 2.5s infinite;
}
.whatsapp-float:hover {
  background: #1ebe59;
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 12px 40px rgba(37,211,102,.55);
  animation: none;
}
.whatsapp-float__label { white-space: nowrap; }

@keyframes pulse-whatsapp {
  0%, 100% { box-shadow: 0 8px 32px rgba(37,211,102,.45); }
  50%       { box-shadow: 0 8px 48px rgba(37,211,102,.7); }
}

/* =============================================
   RESPONSIVE
   ============================================= */

/* Tablets */
@media (max-width: 900px) {
  .usinas__content  { grid-template-columns: 1fr; gap: 2.5rem; }
  .usinas__overlay  { background: rgba(15,23,42,.88); }
  .usinas__specs    { grid-template-columns: repeat(4, 1fr); }
  .projects-grid    { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid  { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid{ grid-template-columns: 1fr; max-width: 560px; margin-inline: auto; }
  .contact__grid    { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer__grid     { grid-template-columns: 1fr 1fr; }
}

/* Mobile */
@media (max-width: 640px) {
  .nav__links   { display: none; }
  .nav__toggle  { display: block; }

  .hero__stats  { gap: 1rem; }
  .stat__divider{ display: none; }

  .projects-grid    { grid-template-columns: 1fr; }
  .advantages-grid  { grid-template-columns: 1fr; }
  .usinas__specs    { grid-template-columns: 1fr 1fr; }

  .footer__grid { grid-template-columns: 1fr; gap: 2rem; }

  .whatsapp-float__label { display: none; }
  .whatsapp-float { padding: 1rem; border-radius: 50%; }
  .whatsapp-float { bottom: 1.5rem; right: 1.5rem; }

  .contact__form { padding: 1.5rem; }
  .hero__actions { flex-direction: column; align-items: flex-start; }
}

/* Very small */
@media (max-width: 380px) {
  .cards-grid { grid-template-columns: 1fr; }
}