/* ═══════════════════════════════════════════════
   ASERSA — Modern Diesel Maintenance Website
   Palette: #E62C2F (red) · #1A1A2E (dark) · #16213E (navy)
   ═══════════════════════════════════════════════ */

:root {
  --red: #E62C2F;
  --red-dark: #C42325;
  --red-rgb: 230, 44, 47;
  --dark: #1A1A2E;
  --navy: #16213E;
  --navy-rgb: 22, 33, 62;
  --text: #1D1D1F;
  --text-2: #6E6E73;
  --bg: #FFFFFF;
  --bg-soft: #F5F5F7;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Space Grotesk', var(--font);
  --fs-hero: clamp(2.5rem, 6vw, 4.5rem);
  --fs-h1: clamp(2rem, 4vw, 3rem);
  --fs-h2: clamp(1.5rem, 3vw, 2.25rem);
  --fs-h3: clamp(1.125rem, 2vw, 1.375rem);
  --fs-body: clamp(1rem, 1.2vw, 1.0625rem);
  --fs-small: 0.875rem;

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --space-2xl: 96px;

  --radius: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.12);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.15);

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 0.3s;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--font);
  font-size: var(--fs-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-md); }

/* ── Skip Link ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  background: var(--red);
  color: #fff;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius);
  z-index: 1000;
  font-weight: 600;
}
.skip-link:focus { top: var(--space-sm); }

/* ── Eyebrow ── */
.eyebrow {
  font-size: var(--fs-small);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--red);
  margin-bottom: var(--space-xs);
}

/* ── Section Desc ── */
.section-desc {
  color: var(--text-2);
  max-width: 600px;
  margin: 0 auto var(--space-lg);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: var(--fs-small);
  transition: all var(--duration) var(--ease);
  cursor: pointer;
  border: none;
  font-family: inherit;
}
.btn--primary {
  background: var(--red);
  color: #fff;
}
.btn--primary:hover { background: var(--red-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(var(--red-rgb), 0.3); }
.btn--outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.3);
}
.btn--outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); }
.btn--sm { padding: 10px 20px; font-size: 0.8125rem; background: var(--dark); color: #fff; }
.btn--sm:hover { background: var(--navy); }
.btn--lg { padding: 18px 36px; font-size: 1rem; }

/* ── NAVBAR ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  transition: all var(--duration) var(--ease);
}
.nav--scrolled { box-shadow: var(--shadow-sm); }
.nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand__text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark);
}
.brand__accent { color: var(--red); }
.brand__text--lg { font-size: 1.75rem; }
.nav__links { display: flex; gap: var(--space-md); }
.nav__links a {
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--text);
  transition: color var(--duration) var(--ease);
  position: relative;
}
.nav__links a:hover { color: var(--red); }
.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--red);
  transition: width var(--duration) var(--ease);
}
.nav__links a:hover::after { width: 100%; }
.nav__cta {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: #25D366;
  color: #fff;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: var(--fs-small);
  transition: all var(--duration) var(--ease);
}
.nav__cta:hover { background: #20BD5C; transform: translateY(-2px); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--dark);
  transition: all var(--duration) var(--ease);
}

/* ── HERO ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
}
.hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,26,46,0.92) 0%, rgba(22,33,62,0.85) 100%);
}
.hero__content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  padding-top: 100px;
}
.hero__eyebrow {
  font-size: var(--fs-small);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--red);
  margin-bottom: var(--space-sm);
}
.hero__title {
  font-family: var(--font-display);
  font-size: var(--fs-hero);
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  margin-bottom: var(--space-md);
}
.hero__text {
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  color: rgba(255,255,255,0.8);
  max-width: 550px;
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}
.hero__ctas { display: flex; gap: var(--space-sm); flex-wrap: wrap; }
.hero__scroll {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  animation: bounce 2s infinite;
}
.hero__scroll a { color: rgba(255,255,255,0.6); }
.hero__scroll a:hover { color: #fff; }

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

/* ── SERVICES ── */
.services {
  padding: var(--space-2xl) 0;
  text-align: center;
  background: var(--bg);
}
.services h2 { margin-bottom: var(--space-xs); }
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  text-align: left;
}
.service-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.06);
  transition: all var(--duration) var(--ease);
}
.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}
.service-card__img {
  height: 240px;
  overflow: hidden;
}
.service-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}
.service-card:hover .service-card__img img { transform: scale(1.05); }
.service-card__content { padding: var(--space-md); }
.service-card__num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: rgba(var(--navy-rgb), 0.1);
  line-height: 1;
  display: block;
  margin-bottom: var(--space-xs);
}
.service-card__title {
  font-size: var(--fs-h3);
  margin-bottom: var(--space-xs);
}
.service-card__text {
  color: var(--text-2);
  font-size: var(--fs-small);
  margin-bottom: var(--space-sm);
  line-height: 1.6;
}

/* ── ABOUT ── */
.about {
  padding: var(--space-2xl) 0;
  background: var(--bg-soft);
}
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}
.about__img {
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.about__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.about h2 { margin-bottom: var(--space-sm); }
.about__text {
  color: var(--text-2);
  margin-bottom: var(--space-md);
  line-height: 1.7;
}
.about__tabs {
  display: flex;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}
.about__tab {
  padding: 10px 20px;
  background: transparent;
  border: 2px solid rgba(0,0,0,0.1);
  border-radius: var(--radius);
  font-weight: 600;
  font-size: var(--fs-small);
  cursor: pointer;
  transition: all var(--duration) var(--ease);
  font-family: inherit;
}
.about__tab.active, .about__tab:hover {
  background: var(--dark);
  color: #fff;
  border-color: var(--dark);
}
.about__tab-content { display: none; }
.about__tab-content.active { display: block; }
.about__tab-content p { color: var(--text-2); line-height: 1.7; }
.about__values {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs);
}
.about__values li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
}
.about__values .check {
  color: var(--red);
  font-weight: 700;
}

/* ── WHY ── */
.why {
  padding: var(--space-2xl) 0;
  text-align: center;
}
.why h2 { margin-bottom: var(--space-xs); }
.why__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  text-align: center;
}
.why-card {
  padding: var(--space-md);
}
.why-card__img {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto var(--space-md);
}
.why-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.why-card__title {
  font-size: var(--fs-h3);
  margin-bottom: var(--space-xs);
}
.why-card__text {
  color: var(--text-2);
  font-size: var(--fs-small);
  line-height: 1.6;
}

/* ── STATS ── */
.stats {
  padding: var(--space-xl) 0;
  background: var(--dark);
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  text-align: center;
}
.stat { color: #fff; }
.stat__num {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--red);
  display: block;
  line-height: 1;
}
.stat__text {
  font-size: var(--fs-small);
  color: rgba(255,255,255,0.7);
  margin-top: var(--space-xs);
}

/* ── CTA ── */
.cta {
  padding: var(--space-xl) 0;
  background: var(--red);
  text-align: center;
  color: #fff;
}
.cta h2 {
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  margin-bottom: var(--space-xs);
}
.cta p {
  font-size: 1.125rem;
  opacity: 0.9;
  margin-bottom: var(--space-md);
}
.cta .btn--primary {
  background: #fff;
  color: var(--red);
}
.cta .btn--primary:hover {
  background: var(--dark);
  color: #fff;
}

/* ── CONTACT ── */
.contact {
  padding: var(--space-2xl) 0;
  background: var(--bg-soft);
}
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}
.contact h2 { margin-bottom: var(--space-md); }
.contact__details { display: flex; flex-direction: column; gap: var(--space-md); }
.contact__item {
  display: flex;
  gap: var(--space-sm);
}
.contact__icon { font-size: 1.5rem; }
.contact__item strong { display: block; margin-bottom: 4px; }
.contact__item p { color: var(--text-2); font-size: var(--fs-small); }
.contact__item a:hover { color: var(--red); }

/* ── FOOTER ── */
.footer {
  background: var(--dark);
  color: #fff;
  padding: var(--space-xl) 0 var(--space-md);
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}
.footer__brand p {
  color: rgba(255,255,255,0.6);
  font-size: var(--fs-small);
  margin-top: var(--space-xs);
}
.footer__col h4 {
  font-size: var(--fs-small);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}
.footer__col a, .footer__col p {
  display: block;
  color: rgba(255,255,255,0.6);
  font-size: var(--fs-small);
  margin-bottom: 8px;
  transition: color var(--duration) var(--ease);
}
.footer__col a:hover { color: #fff; }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-md);
  text-align: center;
  font-size: var(--fs-small);
  color: rgba(255,255,255,0.5);
}

/* ── WhatsApp Float ── */
.wa-float {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  background: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(37,211,102,0.4);
  z-index: 99;
  transition: all var(--duration) var(--ease);
}
.wa-float:hover { transform: scale(1.1); box-shadow: 0 6px 24px rgba(37,211,102,0.5); }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .services__grid { grid-template-columns: 1fr; }
  .about__grid { grid-template-columns: 1fr; }
  .why__grid { grid-template-columns: 1fr; }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .contact__grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__cta { display: none; }
  .hamburger { display: flex; }
  .nav__links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    padding: var(--space-md);
    box-shadow: var(--shadow-md);
    gap: var(--space-sm);
  }
  .hero__content { padding-top: 120px; }
  .hero__title { font-size: clamp(2rem, 8vw, 3rem); }
  .stats__grid { grid-template-columns: 1fr 1fr; gap: var(--space-sm); }
  .footer__grid { grid-template-columns: 1fr; }
}

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