/* =============================================
   OPSEK LABS — Main Stylesheet
   Brand: Dark / Neon Green + Magenta
   ============================================= */

:root {
  --green: #00FF41;
  --green-dim: #00CC33;
  --magenta: #EE00FF;
  --cyan: #00FFFF;
  --bg: #000000;
  --bg-2: #080808;
  --bg-3: #0d0d0d;
  --surface: #111111;
  --surface-2: #1a1a1a;
  --border: rgba(0,255,65,0.15);
  --border-bright: rgba(0,255,65,0.4);
  --text: #e8e8e8;
  --text-dim: #888;
  --text-dimmer: #555;
  --font-head: 'Exo 2', 'Rajdhani', sans-serif;
  --font-body: 'Rajdhani', 'Exo 2', sans-serif;
  --radius: 8px;
  --radius-lg: 16px;
  --transition: 0.2s ease;
  --glow-green: 0 0 20px rgba(0,255,65,0.4), 0 0 60px rgba(0,255,65,0.1);
  --glow-mag: 0 0 20px rgba(238,0,255,0.4), 0 0 60px rgba(238,0,255,0.1);
}

/* RESET */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: var(--green); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--magenta); }
ul { list-style: none; }
img { max-width: 100%; display: block; }

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

/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  border-radius: var(--radius);
  white-space: nowrap;
}
.btn--sm { font-size: 12px; padding: 8px 18px; }
.btn--lg { font-size: 15px; padding: 16px 36px; }
.btn--full { width: 100%; }
.btn--primary {
  background: var(--green);
  color: #000;
  font-size: 13px;
  padding: 10px 24px;
}
.btn--primary:hover {
  background: #00ff80;
  box-shadow: var(--glow-green);
  color: #000;
}
.btn--ghost {
  background: transparent;
  color: var(--green);
  border: 1px solid var(--border-bright);
  font-size: 13px;
  padding: 10px 24px;
}
.btn--ghost:hover {
  border-color: var(--green);
  box-shadow: var(--glow-green);
  color: var(--green);
}
.btn--glow {
  background: transparent;
  color: var(--green);
  border: 1px solid var(--border-bright);
  font-size: 11px;
  padding: 8px 16px;
}
.btn--glow:hover {
  background: var(--green);
  color: #000;
}

/* =============================================
   NAV
   ============================================= */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  gap: 24px;
}
.nav__logo { text-decoration: none; }
.logo-text {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 4px;
  color: #fff;
}
.logo-accent { color: var(--green); }
.nav__links {
  display: flex;
  gap: 32px;
}
.nav__links a {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-dim);
  transition: color var(--transition);
}
.nav__links a:hover { color: var(--green); }
.nav__burger {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 24px;
  cursor: pointer;
}

/* =============================================
   HERO
   ============================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 64px;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 60% 40%, rgba(0,255,65,0.06) 0%, transparent 60%),
              radial-gradient(ellipse at 20% 80%, rgba(238,0,255,0.06) 0%, transparent 50%);
}
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,255,65,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,255,65,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.8) 0%, transparent 70%);
}
.hero__content {
  position: relative;
  z-index: 1;
  max-width: 700px;
  padding: 80px 24px;
}
.hero__badge {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--green);
  border: 1px solid var(--border-bright);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 28px;
}
.hero__title {
  font-family: var(--font-head);
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 900;
  line-height: 1.1;
  color: #fff;
  margin-bottom: 20px;
}
.text-accent { color: var(--green); }
.hero__sub {
  font-size: 18px;
  color: var(--text-dim);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.7;
}
.hero__cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero__trust {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: 0.5px;
}
.trust-icon { font-size: 16px; }

/* =============================================
   TRUST BAR
   ============================================= */
.trust-bar {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
  overflow: hidden;
}
.trust-bar__inner {
  display: flex;
  gap: 48px;
  justify-content: center;
  flex-wrap: wrap;
}
.trust-bar__item {
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* =============================================
   SECTIONS
   ============================================= */
.section { padding: 100px 0; }
.section__header {
  text-align: center;
  margin-bottom: 56px;
}
.section__label {
  font-family: var(--font-head);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 12px;
}
.section__title {
  font-family: var(--font-head);
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 900;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 12px;
}
.section__sub {
  color: var(--text-dim);
  font-size: 14px;
}
.stars-overall {
  color: #FFD700;
  font-size: 14px;
  margin-top: 8px;
}
.stars-overall span { color: var(--text-dim); }

/* =============================================
   PRODUCTS
   ============================================= */
.products { background: var(--bg-2); }

.product-filters {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.filter-btn {
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 8px 20px;
  border-radius: 100px;
  cursor: pointer;
  transition: all var(--transition);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--green);
  color: #000;
  border-color: var(--green);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.product-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}
.product-card:hover {
  border-color: var(--green);
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0,255,65,0.12);
}
.product-card__badge {
  position: absolute;
  top: 12px; right: 12px;
  z-index: 2;
  font-family: var(--font-head);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  background: var(--green);
  color: #000;
  padding: 4px 10px;
  border-radius: 4px;
}
.badge--new { background: var(--cyan); }
.badge--hot { background: #FF6600; color: #fff; }

.product-card__img {
  height: 140px;
  background: var(--bg-3);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border);
}

/* Vial graphics (CSS art) */
.vial-graphic {
  width: 30px;
  height: 80px;
  border-radius: 4px 4px 14px 14px;
  border: 2px solid rgba(0,255,65,0.6);
  position: relative;
  background: linear-gradient(to bottom, rgba(0,255,65,0.1), rgba(0,255,65,0.3));
  box-shadow: 0 0 20px rgba(0,255,65,0.3), inset 0 0 10px rgba(0,255,65,0.1);
}
.vial-graphic::before {
  content: '';
  position: absolute;
  top: -12px; left: 4px; right: 4px;
  height: 12px;
  background: rgba(0,255,65,0.4);
  border-radius: 3px 3px 0 0;
  border: 2px solid rgba(0,255,65,0.6);
  border-bottom: none;
}
.vial-graphic--blue { border-color: rgba(0,150,255,0.6); background: linear-gradient(to bottom, rgba(0,150,255,0.1), rgba(0,150,255,0.3)); box-shadow: 0 0 20px rgba(0,150,255,0.3); }
.vial-graphic--blue::before { background: rgba(0,150,255,0.4); border-color: rgba(0,150,255,0.6); border-bottom: none; }
.vial-graphic--purple { border-color: rgba(150,0,255,0.6); background: linear-gradient(to bottom, rgba(150,0,255,0.1), rgba(150,0,255,0.3)); box-shadow: 0 0 20px rgba(150,0,255,0.3); }
.vial-graphic--purple::before { background: rgba(150,0,255,0.4); border-color: rgba(150,0,255,0.6); border-bottom: none; }
.vial-graphic--green { border-color: rgba(0,255,100,0.8); }
.vial-graphic--cyan { border-color: rgba(0,255,255,0.6); background: linear-gradient(to bottom, rgba(0,255,255,0.1), rgba(0,255,255,0.3)); box-shadow: 0 0 20px rgba(0,255,255,0.3); }
.vial-graphic--cyan::before { background: rgba(0,255,255,0.4); border-color: rgba(0,255,255,0.6); border-bottom: none; }
.vial-graphic--pink { border-color: rgba(255,0,150,0.6); background: linear-gradient(to bottom, rgba(255,0,150,0.1), rgba(255,0,150,0.3)); box-shadow: 0 0 20px rgba(255,0,150,0.3); }
.vial-graphic--pink::before { background: rgba(255,0,150,0.4); border-color: rgba(255,0,150,0.6); border-bottom: none; }
.vial-graphic--gold { border-color: rgba(255,180,0,0.6); background: linear-gradient(to bottom, rgba(255,180,0,0.1), rgba(255,180,0,0.3)); box-shadow: 0 0 20px rgba(255,180,0,0.3); }
.vial-graphic--gold::before { background: rgba(255,180,0,0.4); border-color: rgba(255,180,0,0.6); border-bottom: none; }
.vial-graphic--orange { border-color: rgba(255,100,0,0.6); background: linear-gradient(to bottom, rgba(255,100,0,0.1), rgba(255,100,0,0.3)); box-shadow: 0 0 20px rgba(255,100,0,0.3); }
.vial-graphic--orange::before { background: rgba(255,100,0,0.4); border-color: rgba(255,100,0,0.6); border-bottom: none; }

.product-card__body { padding: 20px; }
.product-card__cat {
  font-family: var(--font-head);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 6px;
}
.product-card__name {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}
.product-card__desc {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.5;
  margin-bottom: 12px;
}
.product-card__purity {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--green);
  font-weight: 600;
  margin-bottom: 14px;
}
.purity-dot {
  width: 6px; height: 6px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--green);
}
.product-card__sizes {
  display: flex;
  gap: 6px;
  margin-bottom: 16px;
}
.size-btn {
  font-family: var(--font-head);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 5px 12px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
}
.size-btn:hover, .size-btn.active {
  border-color: var(--green);
  color: var(--green);
}
.product-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.product-card__price {
  font-family: var(--font-head);
  font-size: 26px;
  font-weight: 900;
  color: #fff;
}

/* =============================================
   PURITY SECTION
   ============================================= */
.purity { background: var(--bg); }
.purity__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.purity__text p {
  color: var(--text-dim);
  margin-bottom: 24px;
  font-size: 16px;
  line-height: 1.7;
}
.purity__list {
  list-style: none;
  margin-bottom: 32px;
}
.purity__list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
  color: var(--text);
}
.check { color: var(--green); font-weight: 700; font-size: 16px; }

.purity__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}
.stat-card:hover {
  border-color: var(--green);
  box-shadow: var(--glow-green);
}
.stat-card__num {
  font-family: var(--font-head);
  font-size: 48px;
  font-weight: 900;
  color: var(--green);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-pct {
  font-size: 24px;
}
.stat-card__label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* =============================================
   REVIEWS
   ============================================= */
.reviews { background: var(--bg-2); }
.reviews__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.review-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
}
.review-card:hover {
  border-color: var(--green);
}
.review-card__stars {
  color: #FFD700;
  font-size: 16px;
  margin-bottom: 14px;
}
.review-card p {
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 16px;
  font-style: italic;
}
.review-card__author {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: 0.5px;
}

/* =============================================
   FAQ
   ============================================= */
.faq { background: var(--bg); }
.faq__list { max-width: 760px; margin: 0 auto; }
.faq__item {
  border-bottom: 1px solid var(--border);
}
.faq__item summary {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: '+';
  color: var(--green);
  font-size: 22px;
  transition: transform var(--transition);
}
.faq__item[open] summary::after {
  transform: rotate(45deg);
}
.faq__item p {
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.7;
  padding-bottom: 20px;
}

/* =============================================
   NEWSLETTER
   ============================================= */
.newsletter {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 60px 0;
}
.newsletter__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.newsletter__text h3 {
  font-family: var(--font-head);
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 6px;
}
.newsletter__text p { color: var(--text-dim); font-size: 14px; }
.newsletter__form {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.newsletter__form input {
  background: var(--bg-2);
  border: 1px solid var(--border-bright);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  padding: 12px 20px;
  border-radius: var(--radius);
  width: 300px;
  outline: none;
  transition: border-color var(--transition);
}
.newsletter__form input:focus { border-color: var(--green); }
.newsletter__form input::placeholder { color: var(--text-dimmer); }

/* =============================================
   FOOTER
   ============================================= */
.footer { background: var(--bg-3); padding: 60px 0 0; }
.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 48px;
}
.footer__brand .logo-text { font-size: 20px; display: block; margin-bottom: 12px; }
.footer__brand p { color: var(--text-dim); font-size: 14px; margin-bottom: 8px; }
.footer__email { color: var(--green) !important; }
.footer__links h4 {
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 16px;
}
.footer__links ul li { margin-bottom: 10px; }
.footer__links ul li a { color: var(--text-dim); font-size: 14px; }
.footer__links ul li a:hover { color: var(--green); }
.footer__legal {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align: center;
}
.footer__legal p { color: var(--text-dimmer); font-size: 11px; line-height: 1.8; }

/* =============================================
   CART SIDEBAR
   ============================================= */
.cart-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 1999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.cart-overlay.open { opacity: 1; pointer-events: all; }
.cart-sidebar {
  position: fixed;
  top: 0; right: 0;
  width: 380px;
  height: 100vh;
  background: var(--surface);
  border-left: 1px solid var(--border);
  z-index: 2000;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
}
.cart-sidebar.open { transform: translateX(0); }
.cart-sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px;
  border-bottom: 1px solid var(--border);
}
.cart-sidebar__header h3 {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  color: #fff;
}
.cart-close {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 20px;
  cursor: pointer;
}
.cart-sidebar__items { flex: 1; padding: 24px; overflow-y: auto; }
.cart-empty { color: var(--text-dim); text-align: center; margin-top: 40px; }
.cart-sidebar__footer {
  padding: 24px;
  border-top: 1px solid var(--border);
}
.cart-total {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}
.cart-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}
.cart-item__name { font-size: 14px; font-weight: 600; color: #fff; }
.cart-item__size { font-size: 12px; color: var(--text-dim); }
.cart-item__price { font-family: var(--font-head); font-weight: 800; color: var(--green); white-space: nowrap; }
.cart-item__remove { background: none; border: none; color: var(--text-dimmer); cursor: pointer; font-size: 16px; }
.cart-item__remove:hover { color: var(--magenta); }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 900px) {
  .purity__inner { grid-template-columns: 1fr; gap: 48px; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1/-1; }
}
@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__burger { display: block; }
  .hero__title { font-size: 36px; }
  .product-grid { grid-template-columns: 1fr 1fr; }
  .purity__stats { grid-template-columns: 1fr 1fr; }
  .footer__inner { grid-template-columns: 1fr; gap: 32px; }
  .newsletter__inner { flex-direction: column; text-align: center; }
  .newsletter__form { justify-content: center; }
  .newsletter__form input { width: 100%; }
}
@media (max-width: 480px) {
  .product-grid { grid-template-columns: 1fr; }
  .hero__cta { flex-direction: column; }
  .cart-sidebar { width: 100%; }
}