/* =========================================================
   ZEON FITNESS CLUB — styles.css
   Dark theme · Red accent (#e8000d) · Oswald + Inter
   ========================================================= */

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

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

body {
  font-family: 'Inter', sans-serif;
  background: #0a0a0a;
  color: #fff;
  overflow-x: hidden;
}

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

/* ---- Design tokens ---- */
:root {
  --red:      #e8000d;
  --red-dark: #b30000;
  --dark:     #0a0a0a;
  --dark-2:   #111111;
  --dark-3:   #1a1a1a;
  --card-bg:  #141414;
  --text-muted: rgba(255,255,255,.55);
  --radius:   6px;
  --transition: .3s ease;
  --header-h: 70px;
}

/* ---- Utility ---- */
.container {
  width: 100%;
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: 24px;
}

.section { padding-block: 90px; }

.section__title {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  line-height: 1.1;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 36px;
  border-radius: 999px;
  font-family: 'Oswald', sans-serif;
  font-size: .95rem;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  border: 2px solid transparent;
}
.btn--outline {
  border-color: #fff;
  color: #fff;
  background: transparent;
}
.btn--outline:hover {
  background: #fff;
  color: #000;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,255,255,.15);
}
.btn--red {
  background: var(--red);
  color: #fff;
  border-color: var(--red);
}
.btn--red:hover {
  background: var(--red-dark);
  border-color: var(--red-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(232,0,13,.35);
}
.btn--full { width: 100%; }

/* =========================================================
   HEADER
   ========================================================= */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 1000;
  background: rgba(10,10,10,.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.06);
  transition: background var(--transition);
}
.header.scrolled {
  background: rgba(10,10,10,.97);
}

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

.nav__logo-img {
  height: 46px;
  width: auto;
  filter: drop-shadow(0 0 8px rgba(232,0,13,.5));
  transition: filter var(--transition);
}
.nav__logo:hover .nav__logo-img {
  filter: drop-shadow(0 0 14px rgba(232,0,13,.8));
}

.nav__list {
  display: flex;
  gap: 36px;
}
.nav__link {
  font-family: 'Oswald', sans-serif;
  font-size: .9rem;
  font-weight: 400;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-muted);
  position: relative;
  transition: color var(--transition);
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--red);
  transition: width var(--transition);
}
.nav__link:hover,
.nav__link.active { color: #fff; }
.nav__link:hover::after,
.nav__link.active::after { width: 100%; }

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__burger span {
  display: block;
  width: 26px; 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: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero__bg-img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.05);
  animation: heroZoom 12s ease-in-out infinite alternate;
}
@keyframes heroZoom {
  from { transform: scale(1.05); }
  to   { transform: scale(1.12); }
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    160deg,
    rgba(10,10,10,.72) 0%,
    rgba(10,10,10,.55) 50%,
    rgba(10,10,10,.85) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding-top: var(--header-h);
  animation: fadeUp .9s ease both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero__title {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(2.2rem, 6vw, 4.2rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  line-height: 1.05;
  margin-bottom: 18px;
  text-shadow: 0 2px 18px rgba(0,0,0,.5);
}

.hero__subtitle {
  font-size: clamp(.9rem, 1.6vw, 1.05rem);
  color: rgba(255,255,255,.8);
  line-height: 1.7;
  margin-bottom: 32px;
  font-weight: 300;
}

/* Hero cards */
.hero__cards {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 280px));
  justify-content: center;
  gap: 2px;
  margin-top: 48px;
  width: 100%;
}

.hero__card {
  background: rgba(255,255,255,.07);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,.1);
  padding: 24px 28px;
  text-align: center;
  transition: background var(--transition), border-color var(--transition);
  animation: fadeUp 1s ease both;
}
.hero__card:nth-child(2) { animation-delay: .1s; }
.hero__card:nth-child(3) { animation-delay: .2s; }

.hero__card:hover {
  background: rgba(232,0,13,.15);
  border-color: rgba(232,0,13,.35);
}

.hero__card-title {
  font-family: 'Oswald', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 8px;
  color: #fff;
}
.hero__card-text {
  font-size: .8rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* =========================================================
   ABOUT
   ========================================================= */
.about {
  background: var(--dark-2);
}

.about__header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
  margin-bottom: 48px;
}

.about__title { color: #fff; }

.about__desc {
  font-size: .95rem;
  color: var(--text-muted);
  line-height: 1.8;
  padding-top: 6px;
}

.about__counter {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 40px;
}
.about__counter-number {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 700;
  line-height: 1;
  color: #fff;
}
.about__counter-plus {
  font-family: 'Oswald', sans-serif;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--red);
  line-height: 1;
}
.about__counter-label {
  font-family: 'Oswald', sans-serif;
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-left: 12px;
  align-self: center;
}

.about__images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.about__img-wrap {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
}
.about__img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}
.about__img-wrap:hover .about__img { transform: scale(1.05); }

/* =========================================================
   SERVICES
   ========================================================= */
.services {
  background: var(--dark);
}
.services__title { text-align: center; }
.services__subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: .9rem;
  line-height: 1.8;
  margin-top: 12px;
  margin-bottom: 48px;
}

.services__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  border: 2px solid var(--dark-3);
  border-radius: var(--radius);
  overflow: hidden;
}

.services__card {
  position: relative;
  overflow: hidden;
}
.services__card--text {
  background: var(--card-bg);
  padding: 36px 32px;
  transition: background var(--transition);
}
.services__card--text:hover {
  background: #1c1c1c;
}

.services__card-title {
  font-family: 'Oswald', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 14px;
  color: #fff;
}
.services__card-text {
  font-size: .85rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.services__card--img {
  aspect-ratio: 4/3;
}
.services__img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .6s ease, filter .6s ease;
  filter: brightness(.85);
}
.services__card--img:hover .services__img {
  transform: scale(1.06);
  filter: brightness(1);
}

/* =========================================================
   BMI CALCULATOR
   ========================================================= */
.bmi {
  background: var(--dark-2);
}

.bmi__eyebrow {
  text-align: center;
  font-family: 'Oswald', sans-serif;
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  font-weight: 600;
  color: var(--red);
  letter-spacing: .04em;
  margin-bottom: 36px;
}

.bmi__card {
  max-width: 500px;
  margin-inline: auto;
  background: var(--card-bg);
  border: 2px solid rgba(232,0,13,.3);
  border-radius: 10px;
  padding: 40px 36px 36px;
  text-align: center;
  box-shadow: 0 0 60px rgba(232,0,13,.1);
}

.bmi__title {
  font-family: 'Oswald', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 4px;
}

.bmi__sub {
  font-size: .75rem;
  color: var(--red);
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.bmi__fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

.bmi__field { display: flex; flex-direction: column; gap: 6px; text-align: left; }

.bmi__label {
  font-family: 'Oswald', sans-serif;
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.bmi__input {
  background: #1e1e1e;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius);
  color: #fff;
  font-family: 'Oswald', sans-serif;
  font-size: 1.1rem;
  padding: 12px 14px;
  outline: none;
  transition: border-color var(--transition);
  -moz-appearance: textfield;
}
.bmi__input::-webkit-outer-spin-button,
.bmi__input::-webkit-inner-spin-button { -webkit-appearance: none; }
.bmi__input:focus { border-color: var(--red); }

.bmi__result {
  margin-top: 18px;
  font-family: 'Oswald', sans-serif;
  font-size: 1rem;
  color: #fff;
  min-height: 26px;
  transition: opacity .3s;
}
.bmi__result span { color: var(--red); font-size: 1.3rem; font-weight: 700; }

/* =========================================================
   GALLERY
   ========================================================= */
.gallery {
  background: var(--dark);
}
.gallery__title {
  text-align: center;
  margin-bottom: 40px;
}
.gallery__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.gallery__item {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: zoom-in;
}
.gallery__item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .6s ease, filter .6s ease;
  filter: brightness(.8) saturate(.9);
}
.gallery__item:hover img {
  transform: scale(1.08);
  filter: brightness(1) saturate(1.1);
}

/* Lightbox overlay */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,.9);
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
  animation: fadeIn .2s ease;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: 0 0 60px rgba(0,0,0,.8);
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* =========================================================
   FOOTER / CONTACT
   ========================================================= */
.footer {
  background: var(--dark-2);
  border-top: 1px solid rgba(255,255,255,.07);
  position: relative;
  padding-block: 60px 0;
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}

.footer__col-title {
  font-family: 'Oswald', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: 14px;
  color: #fff;
}

.footer__text {
  font-size: .85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 10px;
}

.footer__phone {
  display: block;
  font-family: 'Oswald', sans-serif;
  font-size: 1.1rem;
  font-weight: 500;
  color: #fff;
  margin-bottom: 16px;
  transition: color var(--transition);
}
.footer__phone:hover { color: var(--red); }

.footer__social { display: flex; gap: 12px; }
.footer__social-link {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.18);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.footer__social-link:hover {
  color: #fff;
  border-color: var(--red);
  background: rgba(232,0,13,.15);
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.06);
  padding-block: 20px;
  font-size: .78rem;
  color: var(--text-muted);
}

/* WhatsApp bubble */
.whatsapp-bubble {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: #25d366;
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(37,211,102,.45);
  z-index: 999;
  transition: transform var(--transition), box-shadow var(--transition);
}
.whatsapp-bubble:hover {
  transform: scale(1.1) translateY(-3px);
  box-shadow: 0 8px 28px rgba(37,211,102,.6);
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 900px) {
  .hero__cards { grid-template-columns: repeat(3, 1fr); }
  .about__header { grid-template-columns: 1fr; gap: 24px; }
  .gallery__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 700px) {
  :root { --header-h: 60px; }

  /* Nav mobile */
  .nav__list {
    position: fixed;
    top: var(--header-h); left: 0; right: 0;
    background: rgba(10,10,10,.97);
    flex-direction: column;
    align-items: center;
    padding: 32px 24px;
    gap: 24px;
    transform: translateY(-110%);
    transition: transform .35s ease;
    border-bottom: 1px solid rgba(255,255,255,.07);
  }
  .nav__list.open { transform: translateY(0); }
  .nav__burger { display: flex; }

  .hero__cards { grid-template-columns: 1fr; }

  .services__grid { grid-template-columns: 1fr; }
  .services__card--img { aspect-ratio: 16/9; }

  .about__images { grid-template-columns: 1fr; }

  .bmi__card { padding: 28px 20px; }
  .bmi__fields { grid-template-columns: 1fr; }

  .footer__inner { grid-template-columns: 1fr; gap: 32px; }
  .gallery__grid  { grid-template-columns: 1fr; }
}

/* =========================================================
   SCROLL REVEAL ANIMATIONS
   ========================================================= */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s ease, transform .7s ease;
}
[data-reveal].visible {
  opacity: 1;
  transform: translateY(0);
}
[data-reveal][data-delay="1"] { transition-delay: .1s; }
[data-reveal][data-delay="2"] { transition-delay: .2s; }
[data-reveal][data-delay="3"] { transition-delay: .3s; }
[data-reveal][data-delay="4"] { transition-delay: .4s; }