/* ═══════════════════════════════════════════════
   Steel Frame Modul — GesKor
   style.css
═══════════════════════════════════════════════ */

:root {
  --c-bg: #0d0f12;
  --c-surface: #15181e;
  --c-surface2: #1c2028;
  --c-border: rgba(255,255,255,.07);
  --c-text: #e8eaf0;
  --c-text-muted: #8892a4;
  --c-accent: #4f9cf9;
  --c-accent-dark: #2d7de0;
  --c-tag: rgba(79,156,249,.15);
  --font: 'Inter', system-ui, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 8px 40px rgba(0,0,0,.45);
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}
.btn--primary {
  background: var(--c-accent);
  color: #fff;
}
.btn--primary:hover { background: var(--c-accent-dark); transform: translateY(-1px); }
.btn--ghost {
  background: transparent;
  color: var(--c-text);
  border: 1.5px solid rgba(255,255,255,.25);
}
.btn--ghost:hover { border-color: var(--c-accent); color: var(--c-accent); }

/* ── Section shared ── */
.section { padding: 100px 0; }
.section__tag {
  display: inline-block;
  background: var(--c-tag);
  color: var(--c-accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 99px;
  margin-bottom: 18px;
}
.section__title {
  font-size: clamp(30px, 4vw, 50px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 18px;
  letter-spacing: -.02em;
}
.section__sub {
  font-size: 17px;
  color: var(--c-text-muted);
  max-width: 600px;
  margin-bottom: 56px;
}

/* ══════════════════════ NAV ══════════════════════ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  padding: 0 32px;
  height: 68px;
  display: flex;
  align-items: center;
  transition: background var(--transition), backdrop-filter var(--transition);
}
.nav.scrolled {
  background: rgba(13,15,18,.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--c-border);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}
.nav__logo img { height: 34px; }
.nav__links {
  display: flex;
  gap: 6px;
  align-items: center;
}
.nav__links a {
  padding: 7px 13px;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 500;
  color: var(--c-text-muted);
  transition: var(--transition);
}
.nav__links a:hover { color: var(--c-text); background: var(--c-border); }
.nav__cta {
  background: var(--c-accent) !important;
  color: #fff !important;
  padding: 8px 18px !important;
}
.nav__cta:hover { background: var(--c-accent-dark) !important; }
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav__burger span {
  display: block;
  width: 26px; height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: var(--transition);
}
.nav__burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger.open span:nth-child(2) { opacity: 0; }
.nav__burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Language toggle ── */
.lang__toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--c-surface);
  border: 1.5px solid var(--c-border);
  border-radius: 8px;
  color: var(--c-text);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 700;
  padding: 6px 12px;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}
.lang__toggle:hover { border-color: var(--c-accent); color: var(--c-accent); }
.lang__flag { font-size: 16px; line-height: 1; }

/* ══════════════════════ HERO ═════════════════════ */
.hero {
  position: relative;
  height: 100svh;
  min-height: 600px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero__slides { position: absolute; inset: 0; }
.hero__slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1.2s ease;
}
.hero__slide.active { opacity: 1; }
.hero__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(160deg, rgba(0,0,0,.55) 0%, rgba(0,0,0,.25) 60%, rgba(0,0,0,.7) 100%);
  z-index: 1;
}
.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 24px;
}
.hero__eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 20px;
}
.hero__title {
  font-size: clamp(38px, 6vw, 80px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.03em;
  margin-bottom: 20px;
  color: #fff;
}
.hero__sub {
  font-size: 18px;
  color: rgba(255,255,255,.8);
  margin-bottom: 40px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}
.hero__actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero__dots {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 2;
}
.hero__dot {
  width: 8px; height: 8px;
  border-radius: 99px;
  background: rgba(255,255,255,.35);
  cursor: pointer;
  transition: var(--transition);
  border: none;
}
.hero__dot.active { background: #fff; width: 24px; }

/* ══════════════════════ BEFORE/AFTER ════════════════ */
.before-after {
  position: relative;
  background: var(--c-surface);
  padding: 80px 0 40px;
  overflow: hidden;
}
.ba__label {
  position: absolute;
  top: 90px;
  z-index: 10;
  background: rgba(0,0,0,.65);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 6px;
  pointer-events: none;
}
.ba__label--left { left: calc(50% - 580px + 16px); }
.ba__label--right { right: calc(50% - 580px + 16px); }
.ba__container {
  position: relative;
  width: min(1160px, calc(100vw - 48px));
  margin: 0 auto;
  height: 520px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: col-resize;
  user-select: none;
}
.ba__img {
  position: absolute;
  inset: 0;
}
.ba__img img { width: 100%; height: 100%; }
.ba__img--before {
  clip-path: inset(0 0 0 50%);
}
.ba__divider {
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 3px;
  background: #fff;
  transform: translateX(-50%);
  z-index: 5;
}
.ba__handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  width: 46px; height: 46px;
  border-radius: 50%;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #000;
  box-shadow: 0 4px 16px rgba(0,0,0,.5);
}
.ba__hint {
  text-align: center;
  color: var(--c-text-muted);
  font-size: 13px;
  margin-top: 16px;
}

/* ══════════════════════ RÓLUNK ══════════════════════ */
.rolunk { background: var(--c-bg); }
.rolunk__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.rolunk__text p { color: var(--c-text-muted); margin-bottom: 16px; }
.rolunk__feats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 32px;
}
.rolunk__feats li {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 500;
}
.feat__icon { font-size: 18px; }
.rolunk__imgs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.rolunk__img {
  border-radius: var(--radius);
  height: 280px;
}
.rolunk__img--top { margin-top: -40px; }

/* ══════════════════════ TECHNOLÓGIA ════════════════ */
.tech { background: var(--c-surface); }
.tech__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}
.tech__step {
  background: var(--c-surface2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: var(--transition);
}
.tech__step:hover { border-color: var(--c-accent); transform: translateY(-4px); }
.tech__num {
  font-size: 42px;
  font-weight: 800;
  color: var(--c-accent);
  opacity: .3;
  line-height: 1;
  margin-bottom: 12px;
}
.tech__step h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.tech__step p { font-size: 14px; color: var(--c-text-muted); }
.tech__video-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #000;
}
.tech__video-inner video {
  width: 100%;
  display: block;
  max-height: 580px;
}

/* ══════════════════════ TERVEZÉS ════════════════════ */
.tervezes { background: var(--c-bg); }
.plans__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.plan__card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.plan__card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: var(--c-accent); }
.plan__thumb {
  position: relative;
  height: 220px;
  overflow: hidden;
}
.plan__thumb img { width: 100%; height: 100%; transition: transform .5s ease; }
.plan__card:hover .plan__thumb img { transform: scale(1.06); }
.plan__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.5);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}
.plan__card:hover .plan__overlay { opacity: 1; }
.plan__info {
  padding: 18px 20px;
}
.plan__info h3 { font-size: 15px; font-weight: 700; margin-bottom: 10px; }
.plan__pdf {
  font-size: 13px;
  color: var(--c-accent);
  font-weight: 500;
  transition: var(--transition);
}
.plan__pdf:hover { opacity: .75; }

/* ══════════════════════ SEGMENT SECTIONS ════════════ */
.segment { background: var(--c-bg); }
.segment--dark { background: var(--c-surface); }
.segment__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 48px;
}
.segment__grid--wide {
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}
.segment__img-wrap {
  border-radius: var(--radius);
  overflow: hidden;
  height: 280px;
}
.segment__img-wrap img {
  width: 100%; height: 100%;
  transition: transform .5s ease;
}
.segment__img-wrap:hover img { transform: scale(1.05); }
.segment__features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.sf {
  background: var(--c-surface2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px;
}
.segment--dark .sf { background: var(--c-bg); }
.sf h4 { font-weight: 700; margin-bottom: 8px; }
.sf p { font-size: 14px; color: var(--c-text-muted); }

/* ══════════════════════ GALLERY ══════════════════════ */
.gallery { background: var(--c-surface); padding-bottom: 80px; }
.gallery .container { margin-bottom: 40px; }
.gallery__masonry {
  columns: 4;
  column-gap: 12px;
  padding: 0 24px;
  max-width: 1200px;
  margin: 0 auto;
}
.gallery__item {
  break-inside: avoid;
  margin-bottom: 12px;
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
}
.gallery__item img {
  width: 100%;
  display: block;
  transition: transform .45s ease, opacity .3s;
}
.gallery__item:hover img { transform: scale(1.04); opacity: .9; }

/* ══════════════════════ CONTACT ══════════════════════ */
.contact { background: var(--c-bg); }
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: start;
}
.contact__info p { color: var(--c-text-muted); margin-bottom: 28px; }
.contact__list li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--c-text-muted);
  margin-bottom: 16px;
  font-size: 15px;
}
.contact__list a:hover { color: var(--c-accent); }
.contact__list svg { flex-shrink: 0; color: var(--c-accent); }
.contact__form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.contact__form label {
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-text-muted);
}
.contact__form input,
.contact__form textarea {
  background: var(--c-surface);
  border: 1.5px solid var(--c-border);
  border-radius: 9px;
  color: var(--c-text);
  font-family: var(--font);
  font-size: 15px;
  padding: 12px 16px;
  outline: none;
  transition: border-color var(--transition);
}
.contact__form input:focus,
.contact__form textarea:focus { border-color: var(--c-accent); }
.contact__form textarea { resize: vertical; }

/* ══════════════════════ FOOTER ═══════════════════════ */
.footer { background: var(--c-surface); border-top: 1px solid var(--c-border); padding: 72px 0 0; }
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--c-border);
}
.footer__logo { height: 32px; margin-bottom: 16px; }
.footer__grid p { font-size: 14px; color: var(--c-text-muted); line-height: 1.7; }
.footer__grid h4 { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 16px; color: var(--c-text); }
.footer__grid ul li { margin-bottom: 10px; }
.footer__grid ul a { font-size: 14px; color: var(--c-text-muted); transition: color var(--transition); }
.footer__grid ul a:hover { color: var(--c-accent); }
.footer__bottom { padding: 24px 0; text-align: center; }
.footer__bottom p { font-size: 13px; color: var(--c-text-muted); }

/* ══════════════════════ PLAN MODAL ══════════════════ */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
}
.modal.open { display: flex; }
.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.85);
  backdrop-filter: blur(8px);
}
.modal__box {
  position: relative;
  z-index: 1;
  width: min(900px, calc(100vw - 32px));
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--c-surface);
}
.modal__close {
  position: absolute;
  top: 14px; right: 14px;
  z-index: 10;
  background: rgba(0,0,0,.6);
  border: none;
  color: #fff;
  font-size: 18px;
  width: 36px; height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.modal__close:hover { background: rgba(0,0,0,.9); }
.modal__slider { overflow: hidden; }
.modal__track {
  display: flex;
  transition: transform .4s cubic-bezier(.4,0,.2,1);
}
.modal__track img {
  flex-shrink: 0;
  width: 100%;
  max-height: 580px;
  object-fit: contain;
  background: #000;
}
.modal__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0,0,0,.6);
  border: none;
  color: #fff;
  font-size: 28px;
  width: 46px; height: 46px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
  z-index: 10;
}
.modal__nav:hover { background: rgba(0,0,0,.9); }
.modal__nav--prev { left: 14px; }
.modal__nav--next { right: 14px; }
.modal__counter {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,.6);
  color: #fff;
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 99px;
  z-index: 10;
}

/* ══════════════════════ LIGHTBOX ════════════════════ */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1100;
  align-items: center;
  justify-content: center;
}
.lightbox.open { display: flex; }
.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.93);
  backdrop-filter: blur(10px);
}
.lightbox__img {
  position: relative;
  z-index: 1;
  max-width: min(1000px, 92vw);
  max-height: 88vh;
  object-fit: contain;
  border-radius: 10px;
  box-shadow: 0 20px 80px rgba(0,0,0,.8);
}
.lightbox__close {
  position: absolute;
  top: 18px; right: 18px;
  z-index: 2;
  background: rgba(255,255,255,.1);
  border: none;
  color: #fff;
  font-size: 20px;
  width: 40px; height: 40px;
  border-radius: 50%;
  cursor: pointer;
}
.lightbox__nav {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  background: rgba(255,255,255,.1);
  border: none;
  color: #fff;
  font-size: 32px;
  width: 52px; height: 52px;
  border-radius: 50%;
  cursor: pointer;
  z-index: 2;
  transition: background var(--transition);
}
.lightbox__nav:hover { background: rgba(255,255,255,.2); }
.lightbox__nav--prev { left: 18px; }
.lightbox__nav--next { right: 18px; }

/* ══════════════════════ RESPONSIVE ══════════════════ */
@media (max-width: 1024px) {
  .tech__steps { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .gallery__masonry { columns: 3; }
  .ba__label--left { left: 16px; }
  .ba__label--right { right: 16px; }
}

@media (max-width: 768px) {
  .nav__links { display: none; flex-direction: column; position: fixed; inset: 68px 0 0; background: rgba(13,15,18,.97); padding: 24px; gap: 8px; overflow-y: auto; }
  .nav__links.open { display: flex; }
  .nav__links a { padding: 14px 16px; font-size: 16px; border-radius: 10px; }
  .nav__burger { display: flex; }
  .rolunk__grid { grid-template-columns: 1fr; }
  .rolunk__imgs { grid-template-columns: 1fr 1fr; }
  .rolunk__img--top { margin-top: 0; }
  .contact__grid { grid-template-columns: 1fr; gap: 40px; }
  .form__row { grid-template-columns: 1fr; }
  .segment__features { grid-template-columns: 1fr; }
  .gallery__masonry { columns: 2; }
  .ba__container { height: 300px; }
}

@media (max-width: 480px) {
  .section { padding: 64px 0; }
  .gallery__masonry { columns: 1; }
  .tech__steps { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .ba__container { height: 220px; }
}