/* ==========================================================================
   LÜGER GROUP – Orbitalní svařování
   ========================================================================== */

:root {
  --color-bg: #000000;
  --color-text: #ffffff;
  --color-text-muted: #b0b0b0;
  --color-accent: #e30613;
  --color-accent-hover: #c70511;
  --color-card-bg: #111111;
  --color-border: #2a2a2a;
  --color-divider: #333333;
  --header-height: 72px;
  --font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --container-max: 1200px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-text);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover,
a:focus-visible {
  color: var(--color-accent);
}

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

address {
  font-style: normal;
}

ul {
  list-style: none;
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  position: relative;
}

.site-header__logo img {
  height: 48px;
  width: auto;
  object-fit: contain;
}

.site-header__menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
}

.site-header__menu-icon,
.site-header__menu-icon::before,
.site-header__menu-icon::after {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}

.site-header__menu-icon {
  position: relative;
}

.site-header__menu-icon::before,
.site-header__menu-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.site-header__menu-icon::before {
  top: -7px;
}

.site-header__menu-icon::after {
  top: 7px;
}

.site-header__menu-btn[aria-expanded="true"] .site-header__menu-icon {
  background-color: transparent;
}

.site-header__menu-btn[aria-expanded="true"] .site-header__menu-icon::before {
  transform: translateY(7px) rotate(45deg);
}

.site-header__menu-btn[aria-expanded="true"] .site-header__menu-icon::after {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  position: absolute;
  top: calc(100% + 4px);
  right: 24px;
  min-width: 180px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
}

.site-nav.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.site-nav__list {
  padding: 8px 0;
}

.site-nav__link {
  display: block;
  padding: 10px 20px;
  font-size: 0.95rem;
  color: var(--color-text);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  background-color: #1a1a1a;
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  margin-top: var(--header-height);
  min-height: 500px;
  height: 78vh;
  max-height: 820px;
  background: var(--color-bg) url("../../hero.png") center right / cover no-repeat;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(0, 0, 0, 1) 0%,
    rgba(0, 0, 0, 1) 28%,
    rgba(0, 0, 0, 0.92) 42%,
    rgba(0, 0, 0, 0.7) 58%,
    rgba(0, 0, 0, 0.35) 75%,
    rgba(0, 0, 0, 0) 100%
  );
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 48px 24px 56px;
  width: 100%;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 28px;
  letter-spacing: -0.02em;
}

.hero__title-line {
  display: block;
}

.hero__title-line--white {
  color: var(--color-text);
}

.hero__title-line--red {
  color: var(--color-accent);
}

.hero__text {
  max-width: 560px;
  margin-bottom: 36px;
}

.hero__text p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 14px;
  line-height: 1.65;
}

.hero__text p:last-child {
  margin-bottom: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: background-color var(--transition), transform var(--transition);
}

.btn--cta {
  background-color: var(--color-accent);
  color: var(--color-text);
  padding: 16px 28px;
  border-radius: 2px;
}

.btn--cta:hover,
.btn--cta:focus-visible {
  background-color: var(--color-accent-hover);
  color: var(--color-text);
  transform: translateY(-1px);
}

.btn__arrow {
  font-size: 1.1rem;
  line-height: 1;
}

/* --------------------------------------------------------------------------
   Benefits
   -------------------------------------------------------------------------- */

.benefits {
  padding: 56px 24px 64px;
  border-bottom: 1px solid var(--color-border);
}

.benefits__inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: var(--container-max);
  margin: 0 auto;
  gap: 0;
}

.benefits__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 24px 32px;
  position: relative;
}

.benefits__item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  top: 15%;
  height: 70%;
  width: 1px;
  background-color: var(--color-divider);
}

.benefits__icon {
  width: 72px;
  height: 72px;
  object-fit: contain;
  margin-bottom: 20px;
}

.benefits__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   Contact & Features
   -------------------------------------------------------------------------- */

.contact-features {
  padding: 72px 24px 80px;
  scroll-margin-top: var(--header-height);
}

#top {
  scroll-margin-top: var(--header-height);
}

.contact-features__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  max-width: var(--container-max);
  margin: 0 auto;
  align-items: start;
}

.contact__label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.contact__heading {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  margin-bottom: 36px;
  line-height: 1.2;
}

.contact__list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.contact__item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.contact__icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  margin-top: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact__icon svg {
  display: block;
  width: 24px;
  height: 24px;
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.95rem;
  line-height: 1.55;
}

.contact__details a {
  color: var(--color-text);
}

.contact__company-info {
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

.features-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 36px 32px;
}

.features-card__heading {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.features-card__list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.features-card__item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.features-card__icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.features-card__title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--color-text);
}

.features-card__desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 24px;
}

.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  max-width: var(--container-max);
  margin: 0 auto;
}

.site-footer__brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.site-footer__logo {
  height: 40px;
  width: auto;
}

.site-footer__name {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.site-footer__copyright {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.site-footer__links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.site-footer__links a {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.site-footer__links a:hover,
.site-footer__links a:focus-visible {
  color: var(--color-text);
}

.site-footer__divider {
  width: 1px;
  height: 16px;
  background-color: var(--color-divider);
}

/* --------------------------------------------------------------------------
   Modal
   -------------------------------------------------------------------------- */

.modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal[hidden] {
  display: none;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.75);
}

.modal__dialog {
  position: relative;
  z-index: 1;
  background-color: #111111;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 36px 32px 32px;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal__close {
  position: absolute;
  top: 12px;
  right: 16px;
  font-size: 1.75rem;
  line-height: 1;
  color: var(--color-text-muted);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition);
}

.modal__close:hover,
.modal__close:focus-visible {
  color: var(--color-text);
}

.modal__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 24px;
  padding-right: 32px;
}

.inquiry-form__honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.inquiry-form__field {
  margin-bottom: 18px;
}

.inquiry-form__field label {
  display: block;
  font-size: 0.88rem;
  margin-bottom: 6px;
  color: var(--color-text-muted);
}

.inquiry-form__field .required {
  color: var(--color-accent);
}

.inquiry-form__field input,
.inquiry-form__field textarea {
  width: 100%;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--color-text);
  background-color: #1a1a1a;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  transition: border-color var(--transition);
}

.inquiry-form__field input:focus,
.inquiry-form__field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.inquiry-form__field input:invalid:not(:placeholder-shown),
.inquiry-form__field textarea:invalid:not(:placeholder-shown) {
  border-color: #8b2020;
}

.inquiry-form__error {
  color: #ff6b6b;
  font-size: 0.88rem;
  margin-bottom: 12px;
}

.inquiry-form__success {
  color: #4caf50;
  font-size: 0.95rem;
  margin-bottom: 12px;
  font-weight: 600;
}

.btn--submit {
  width: 100%;
  justify-content: center;
  background-color: var(--color-accent);
  color: var(--color-text);
  padding: 14px 24px;
  border-radius: 4px;
  margin-top: 8px;
}

.btn--submit:hover,
.btn--submit:focus-visible {
  background-color: var(--color-accent-hover);
  color: var(--color-text);
}

.btn--submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 900px) {
  .contact-features__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .benefits__inner {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .benefits__item:not(:last-child)::after {
    display: none;
  }

  .benefits__item:not(:last-child) {
    border-bottom: 1px solid var(--color-divider);
    padding-bottom: 32px;
  }

  .site-footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .site-footer__brand {
    flex-direction: column;
  }
}

@media (max-width: 600px) {
  :root {
    --header-height: 64px;
  }

  .hero {
    height: auto;
    min-height: 520px;
    max-height: none;
  }

  .hero__overlay {
    background: linear-gradient(
      to bottom,
      rgba(0, 0, 0, 0.95) 0%,
      rgba(0, 0, 0, 0.85) 55%,
      rgba(0, 0, 0, 0.5) 100%
    );
  }

  .hero__content {
    padding: 36px 20px 48px;
  }

  .benefits {
    padding: 40px 20px 48px;
  }

  .contact-features {
    padding: 48px 20px 56px;
  }

  .features-card {
    padding: 28px 20px;
  }

  .site-footer__links {
    flex-direction: column;
    gap: 12px;
  }

  .site-footer__divider {
    display: none;
  }
}