:root {
  --bg-color: #ffffff;
  --text-color: #1a1a1a;
  --gold: #d4af37;
  --gold-light: #e8c76a;
  --gold-dark: #b8941a;
  --card-bg: #fdfdfd;
  --border-color: #f0f0f0;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 20px 50px rgba(0, 0, 0, 0.1);
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.2s ease;
  --care-color: #000000;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 8px;
}

[data-theme="dark"] {
  --bg-color: #0a0a0a;
  --text-color: #ffffff;
  --card-bg: #141414;
  --border-color: #222222;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 20px 50px rgba(0, 0, 0, 0.5);
  --care-color: #ffffff;
}

/* --- CUSTOM SCROLLBAR (Ultra Thin) --- */
::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}

::-webkit-scrollbar-track {
  background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
  background: var(--gold);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gold-dark);
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--gold) transparent;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Tajawal", "Poppins", sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: var(--transition);
  line-height: 1.7;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

/* --- PRELOADER --- */
#preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-color);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.6s ease, visibility 0.6s;
}

.spinner {
  width: 60px;
  height: 60px;
  border: 4px solid rgba(212, 175, 55, 0.1);
  border-radius: 50%;
  border-top-color: var(--gold);
  animation: spin 1s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.loader-hidden {
  opacity: 0;
  visibility: hidden;
}

/* --- HEADER (Transparent on Desktop) --- */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 5%;
  background: transparent;
  z-index: 1000;
  box-shadow: none;
  transition: var(--transition);
}

.logo-container {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.logo {
  font-weight: 700;
  font-size: 1.6rem;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.logo .ztc {
  color: var(--gold);
}

.logo .care {
  color: var(--care-color);
  transition: color 0.4s ease;
}

.logo-sub {
  font-size: 0.55rem;
  font-weight: 500;
  opacity: 0.7;
  margin-top: 4px;
  color: var(--text-color);
  text-transform: uppercase;
}

.controls {
  display: flex;
  gap: 1rem;
}

.btn-transparent {
  background: transparent;
  border: 1px solid var(--gold);
  color: var(--gold);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: inherit;
  font-weight: 500;
  font-size: 0.9rem;
  transition: var(--transition);
}

.btn-transparent:hover {
  background: rgba(212, 175, 55, 0.1);
  transform: translateY(-2px);
}

/* --- MAIN CONTENT --- */
main {
  padding-top: 120px;
  padding-bottom: 4rem;
  max-width: 1100px;
  margin: 0 auto;
  padding-inline: 5%;
}

.hero {
  text-align: center;
  margin-bottom: 3rem;
  animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 0.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  color: var(--text-color);
  font-weight: 500;
  opacity: 0.8;
  font-size: 1.1rem;
}

/* --- CARD & BRAND NAV --- */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow);
  position: relative;
  transition: var(--transition);
  overflow: hidden;
}

.brand-nav {
  display: flex;
  gap: 2.5rem;
  overflow-x: auto;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
  margin-bottom: 2.5rem;
}

.brand-item {
  cursor: pointer;
  white-space: nowrap;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-color);
  opacity: 0.4;
  transition: var(--transition);
  position: relative;
  padding-bottom: 0.4rem;
}

.brand-item.active {
  opacity: 1;
  color: var(--gold);
}

.brand-item.active::after {
  content: "";
  position: absolute;
  bottom: 0px;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gold);
  border-radius: 10px;
}

.condition-item {
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: flex-start;
  gap: 15px;
  animation: slideUp 0.5s ease forwards;
}

/* ✅ FONT AWESOME CHECK ICON (replaced ✓) */
.condition-item::before {
  font-family: "Font Awesome 6 Free";
  content: "\f00c";
  font-weight: 900;
  color: var(--gold);
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-top: 3px;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- BACK TO TOP (RIGHT) --- */
#backToTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 56px;
  height: 56px;
  background: var(--gold);
  border: none;
  border-radius: 50%;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(212, 175, 55, 0.3);
  z-index: 999;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
}

#backToTop.show {
  opacity: 1;
  transform: translateY(0);
}

footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.85rem;
  opacity: 0.6;
  direction: ltr !important;
}

/* --- MOBILE PROFESSIONAL GRID & HEADER --- */
@media (max-width: 768px) {
  header {
    background: var(--bg-color);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
    padding: 1.2rem 5%;
  }

  [data-theme="dark"] header {
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.3);
  }

  .card {
    padding: 1.5rem;
  }

  main {
    padding-top: 100px;
  }

  .brand-nav {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    border-bottom: none;
    padding-bottom: 0;
    overflow-x: hidden;
  }

  .brand-item {
    background: var(--border-color);
    padding: 12px;
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: 0.9rem;
    opacity: 1;
    color: var(--text-color);
    border: 1px solid transparent;
  }

  .brand-item.active {
    background: rgba(212, 175, 55, 0.1);
    border-color: var(--gold);
    color: var(--gold);
  }

  .brand-item.active::after {
    display: none;
  }

  #backToTop {
    bottom: 20px;
    right: 20px;
    width: 48px;
    height: 48px;
  }
}