/* ===================================================
   Ehlen Elektrotechnik – Main Stylesheet
   =================================================== */

/* ---- Custom Properties ---- */
:root {
  --clr-primary: #FFC100;
  --clr-primary-dark: #E0A800;
  --clr-primary-light: #FFF5CC;
  --clr-dark: #1B2C41;
  --clr-dark-2: #243550;
  --clr-dark-3: #2E4060;
  --clr-text: #2C3A4A;
  --clr-text-muted: #6B7A8D;
  --clr-border: #DDE2E8;
  --clr-bg: #ffffff;
  --clr-bg-alt: #F5F6F8;
  --clr-success: #22c55e;

  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', 'Inter', system-ui, sans-serif;
  --radius: 6px;
  --radius-sm: 4px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 4px 16px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.11);

  --header-h: 72px;
  --container: 1200px;
  --transition: 0.22s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  color: var(--clr-text);
  background: var(--clr-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

ul { list-style: none; }

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

address { font-style: normal; }

/* ---- Container ---- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: .95rem;
  letter-spacing: .02em;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition),
              box-shadow var(--transition);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--clr-primary);
  color: var(--clr-dark);
  box-shadow: 0 3px 12px rgba(255,193,0,.3);
}
.btn--primary:hover {
  background: var(--clr-primary-dark);
  color: var(--clr-dark);
  box-shadow: 0 5px 18px rgba(255,193,0,.4);
}

.btn--outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,.45);
}
.btn--outline:hover {
  border-color: #fff;
  background: rgba(255,255,255,.1);
}

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

/* ---- Section helpers ---- */
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--clr-primary);
  margin-bottom: .75rem;
}
.section-eyebrow::before {
  content: '';
  display: block;
  width: 28px;
  height: 2px;
  background: var(--clr-primary);
  flex-shrink: 0;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  color: var(--clr-dark);
  line-height: 1.18;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.02rem;
  color: var(--clr-text-muted);
  max-width: 600px;
  line-height: 1.72;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}
.section-header .section-eyebrow {
  justify-content: center;
}
.section-header .section-eyebrow::before { display: none; }
.section-header .section-subtitle { margin-inline: auto; }

/* ====================================================
   HEADER / NAV
   ==================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}
.header.scrolled {
  background: rgba(27,44,65,.97);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0,0,0,.2);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: 1.05rem;
  color: #fff;
  font-weight: 400;
  letter-spacing: .01em;
}
.nav__logo strong { font-weight: 700; color: var(--clr-primary); }

.nav__list {
  display: flex;
  align-items: center;
  gap: .25rem;
}

.nav__link {
  padding: .5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-weight: 500;
  color: rgba(255,255,255,.8);
  transition: color var(--transition), background var(--transition);
}
.nav__link:hover { color: #fff; background: rgba(255,255,255,.08); }

.nav__link--cta {
  background: var(--clr-primary);
  color: var(--clr-dark);
  font-weight: 600;
}
.nav__link--cta:hover { background: var(--clr-primary-dark); color: var(--clr-dark); }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: .5rem;
}
.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ====================================================
   HERO
   ==================================================== */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  overflow: hidden;
  color: #fff;
  padding-top: var(--header-h);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url('https://images.unsplash.com/photo-1621905251189-08b45d6a269e?auto=format&fit=crop&w=1920&q=80');
  background-size: cover;
  background-position: center 40%;
  z-index: 0;
}
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg,
    rgba(27,44,65,.92) 0%,
    rgba(27,44,65,.72) 55%,
    rgba(27,44,65,.50) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  gap: 1.5rem;
  padding-block: 5rem 3rem;
  max-width: 700px;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 5.5vw, 4.4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.01em;
}

.hero__title-highlight {
  color: var(--clr-primary);
  text-decoration: none;
}

.hero__subtitle {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: rgba(255,255,255,.82);
  max-width: 540px;
  line-height: 1.75;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: .5rem;
}

.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,.12);
  width: 100%;
}

.hero__stat {
  display: flex;
  flex-direction: column;
  gap: .15rem;
}
.hero__stat strong {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--clr-primary);
  line-height: 1;
}
.hero__stat span {
  font-size: .78rem;
  color: rgba(255,255,255,.55);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.hero__scroll {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .4rem;
  padding-bottom: 2rem;
  color: rgba(255,255,255,.35);
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.hero__scroll-arrow {
  width: 1px;
  height: 36px;
  background: linear-gradient(to bottom, rgba(255,255,255,.25), transparent);
  animation: scrollArrow 2s ease-in-out infinite;
}

@keyframes scrollArrow {
  0%, 100% { transform: scaleY(1); opacity: 1; }
  50% { transform: scaleY(.5); opacity: .4; }
}

/* ====================================================
   SERVICES
   ==================================================== */
.services {
  padding-block: 6rem;
  background: var(--clr-bg-alt);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}

.service-card {
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: transform var(--transition), box-shadow var(--transition),
              border-color var(--transition);
}
.service-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--clr-primary-light);
}

.service-card--accent {
  background: var(--clr-dark);
  border-color: var(--clr-dark-3);
  color: #fff;
}
.service-card--accent .service-card__title { color: var(--clr-primary); }
.service-card--accent .service-card__text { color: rgba(255,255,255,.7); }
.service-card--accent .service-card__list li { color: rgba(255,255,255,.65); }
.service-card--accent .service-card__list li::before { color: var(--clr-primary); }
.service-card--accent .service-card__icon {
  background: rgba(255,255,255,.1);
  border-color: rgba(255,255,255,.2);
  color: #fff;
}

.service-card__icon {
  width: 48px;
  height: 48px;
  background: rgba(255,193,0,.08);
  border: 1px solid rgba(255,193,0,.2);
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  margin-bottom: 1.2rem;
  color: var(--clr-primary);
}
.service-card__icon svg { width: 24px; height: 24px; }

.service-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-dark);
  margin-bottom: .55rem;
}

.service-card__text {
  font-size: .92rem;
  color: var(--clr-text-muted);
  margin-bottom: 1rem;
  line-height: 1.65;
}

.service-card__list {
  display: flex;
  flex-direction: column;
  gap: .35rem;
}
.service-card__list li {
  font-size: .875rem;
  color: var(--clr-text-muted);
  display: flex;
  align-items: center;
  gap: .5rem;
}
.service-card__list li::before {
  content: '—';
  color: var(--clr-primary);
  font-weight: 600;
  flex-shrink: 0;
  font-size: .75rem;
}

/* ====================================================
   ABOUT
   ==================================================== */
.about {
  padding-block: 6rem;
}

.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.about__image-col { position: relative; }

.about__image-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.about__photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.about__badge {
  position: absolute;
  bottom: 1.5rem;
  right: 1.5rem;
  background: rgba(255,255,255,.97);
  border-radius: var(--radius);
  padding: .75rem 1rem;
  display: flex;
  align-items: center;
  gap: .75rem;
  box-shadow: var(--shadow-lg);
}
.about__badge-icon {
  width: 36px;
  height: 36px;
  background: rgba(255,193,0,.1);
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  color: var(--clr-primary);
  flex-shrink: 0;
}
.about__badge div { display: flex; flex-direction: column; }
.about__badge strong { font-size: .9rem; font-weight: 700; color: var(--clr-dark); }
.about__badge span { font-size: .75rem; color: var(--clr-text-muted); }

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

.about__text-col p {
  color: var(--clr-text-muted);
  line-height: 1.78;
  font-size: .97rem;
}

.about__highlights {
  display: flex;
  flex-direction: column;
  gap: .6rem;
  margin-block: .5rem;
}

.about__highlight {
  display: flex;
  align-items: center;
  gap: .75rem;
  font-size: .93rem;
  color: var(--clr-text);
}

.about__highlight-icon {
  width: 20px;
  height: 20px;
  background: var(--clr-primary);
  border-radius: 2px;
  display: grid;
  place-items: center;
  font-size: .65rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

/* ====================================================
   FEATURES
   ==================================================== */
.features {
  padding-block: 6rem;
  background: var(--clr-dark);
  color: #fff;
}

.features .section-title { color: #fff; }
.features .section-eyebrow { color: var(--clr-primary); }
.features .section-header .section-eyebrow::before { background: var(--clr-primary); }

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.feature {
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: background var(--transition), border-color var(--transition),
              transform var(--transition);
}
.feature:hover {
  background: rgba(255,255,255,.06);
  border-color: rgba(255,193,0,.35);
  transform: translateY(-3px);
}

.feature__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  margin-bottom: 1.2rem;
  border: 1px solid rgba(255,193,0,.35);
  color: var(--clr-primary);
}
.feature__icon svg { width: 18px; height: 18px; }

.feature h3 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: .45rem;
  letter-spacing: .01em;
}

.feature p {
  font-size: .9rem;
  color: rgba(255,255,255,.55);
  line-height: 1.68;
}

/* ====================================================
   CONTACT
   ==================================================== */
.contact {
  padding-block: 6rem;
  background: var(--clr-bg-alt);
}

.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 5rem;
  align-items: start;
}

.contact__intro {
  color: var(--clr-text-muted);
  margin-bottom: 2rem;
  line-height: 1.78;
  font-size: .97rem;
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact__detail {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact__detail-icon {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  color: var(--clr-primary);
  flex-shrink: 0;
}
.contact__detail-icon svg { width: 16px; height: 16px; }

.contact__detail div {
  display: flex;
  flex-direction: column;
  gap: .15rem;
}
.contact__detail strong {
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--clr-text-muted);
}
.contact__detail span,
.contact__detail a {
  font-size: .97rem;
  color: var(--clr-dark);
  font-weight: 500;
}
.contact__link { color: var(--clr-dark); transition: color var(--transition); }
.contact__link:hover { color: var(--clr-primary); }

/* Form */
.contact__form {
  background: var(--clr-bg);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--clr-border);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: .35rem;
}

.form-group label {
  font-size: .82rem;
  font-weight: 600;
  color: var(--clr-dark);
  letter-spacing: .02em;
}
.form-group label span[aria-hidden] { color: var(--clr-primary); }

.form-group input,
.form-group select,
.form-group textarea {
  padding: .7rem 1rem;
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: .93rem;
  color: var(--clr-dark);
  background: var(--clr-bg);
  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(--clr-primary);
  box-shadow: 0 0 0 3px rgba(255,193,0,.12);
}
.form-group input.invalid,
.form-group select.invalid,
.form-group textarea.invalid {
  border-color: #ef4444;
}

.form-group textarea { resize: vertical; min-height: 120px; }

.form-group--checkbox { flex-direction: row; align-items: flex-start; gap: .5rem; flex-wrap: wrap; }

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: .6rem;
  font-size: .85rem;
  color: var(--clr-text-muted);
  cursor: pointer;
}
.checkbox-label input[type="checkbox"] {
  margin-top: .15rem;
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  accent-color: var(--clr-primary);
  cursor: pointer;
  padding: 0;
}
.checkbox-label a { color: var(--clr-primary-dark); text-decoration: underline; }

.form-error {
  font-size: .8rem;
  color: #ef4444;
  min-height: 1em;
}

.form-success {
  font-size: .9rem;
  color: var(--clr-success);
  background: rgba(34,197,94,.07);
  border: 1px solid rgba(34,197,94,.2);
  border-radius: var(--radius-sm);
  padding: .75rem 1rem;
}

/* ====================================================
   FOOTER
   ==================================================== */
.footer {
  background: var(--clr-dark);
  color: rgba(255,255,255,.65);
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  padding-top: 4rem;
  padding-bottom: 3rem;
}

.footer__brand .nav__logo { color: #fff; margin-bottom: 1rem; }
.footer__brand p { font-size: .875rem; line-height: 1.7; }

.footer__links h4,
.footer__contact h4 {
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: rgba(255,255,255,.35);
  margin-bottom: 1rem;
}

.footer__links ul { display: flex; flex-direction: column; gap: .5rem; }
.footer__links a {
  font-size: .875rem;
  color: rgba(255,255,255,.55);
  transition: color var(--transition);
}
.footer__links a:hover { color: #fff; }

.footer__contact address { display: flex; flex-direction: column; gap: .5rem; }
.footer__contact p, .footer__contact a {
  font-size: .875rem;
  color: rgba(255,255,255,.55);
}
.footer__contact a:hover { color: #fff; }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.06);
  padding-block: 1.25rem;
}

.footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .75rem;
}
.footer__bottom p { font-size: .78rem; color: rgba(255,255,255,.3); }

/* ====================================================
   SCROLL REVEAL
   ==================================================== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .5s ease, transform .5s ease;
}
.reveal.revealed {
  opacity: 1;
  transform: none;
}

/* ====================================================
   BACK TO TOP
   ==================================================== */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 42px;
  height: 42px;
  background: var(--clr-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  font-weight: 700;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition);
  z-index: 999;
}
.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.back-to-top:hover { background: var(--clr-primary-dark); transform: translateY(-2px); }

/* ====================================================
   RESPONSIVE
   ==================================================== */
@media (max-width: 1024px) {
  .about__inner { grid-template-columns: 1fr; gap: 3rem; }
  .about__image-col { max-width: 560px; margin-inline: auto; width: 100%; }
  .contact__inner { grid-template-columns: 1fr; gap: 3rem; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --header-h: 64px; }

  .nav__list {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 999;
    background: rgba(27,44,65,.98);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.5rem 2rem;
    gap: 0;
    transform: translateY(-110%);
    visibility: hidden;
    transition: transform var(--transition), visibility var(--transition);
    backdrop-filter: blur(12px);
    box-shadow: 0 10px 40px rgba(0,0,0,.3);
  }
  .nav__list.open { transform: translateY(0); visibility: visible; }

  .nav__link {
    display: block;
    padding: .75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
  }

  .nav__toggle { display: flex; }
  .nav__toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav__toggle.active span:nth-child(2) { opacity: 0; }
  .nav__toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .hero__content { align-items: flex-start; text-align: left; }
  .hero__actions { flex-direction: column; align-items: flex-start; }
  .hero__stats { gap: 1.5rem; }

  .services__grid { grid-template-columns: 1fr; }
  .features__grid { grid-template-columns: 1fr 1fr; }
  .footer__inner { grid-template-columns: 1fr; gap: 2rem; padding-top: 3rem; }
  .footer__bottom-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .features__grid { grid-template-columns: 1fr; }
  .hero__stats { flex-direction: column; gap: 1rem; }
  .contact__form { padding: 1.5rem; }
}