/* ====================================================================
   Tansik Web Application — Modern Premium Stylesheet (RTL Optimized)
   ==================================================================== */
@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@400;600;700;800;900&display=swap');

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: #070F1E;
  background-image: 
    radial-gradient(at 0% 0%, rgba(14, 165, 233, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(99, 102, 241, 0.10) 0px, transparent 50%),
    radial-gradient(at 50% 50%, rgba(15, 23, 42, 0.8) 0px, transparent 100%);
  background-attachment: fixed;
  color: #F8FAFC;
  font-family: 'Cairo', system-ui, -apple-system, sans-serif;
  direction: rtl;
  text-align: right;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

/* ====================================================================
   Navigation Bar
   ==================================================================== */
.navbar {
  background: rgba(11, 20, 38, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(56, 189, 248, 0.15);
  padding: 0 36px;
  height: 72px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-brand {
  font-size: 1.35rem;
  font-weight: 900;
  color: #38BDF8;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.3px;
}

.nav-brand:hover {
  color: #00E5FF;
}

.nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
  align-items: center;
}

.nav-links li {
  display: inline-block;
}

.nav-links a {
  color: #94A3B8;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.94rem;
  padding: 9px 16px;
  border-radius: 10px;
  transition: all 0.25s ease;
  display: inline-block;
}

.nav-links a:hover {
  color: #38BDF8;
  background: rgba(56, 189, 248, 0.08);
}

.nav-links a.active {
  color: #00E5FF;
  background: rgba(0, 229, 255, 0.12);
  border: 1px solid rgba(0, 229, 255, 0.25);
}

.nav-toggle {
  display: none;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #F8FAFC;
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1.25rem;
}

/* ====================================================================
   Hero Section
   ==================================================================== */
.hero {
  padding: 40px 24px 30px;
  text-align: center;
  position: relative;
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: #FFFFFF;
  margin-bottom: 14px;
  line-height: 1.3;
}

.hero p {
  color: #94A3B8;
  font-size: clamp(0.98rem, 1.8vw, 1.12rem);
  max-width: 740px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

/* ====================================================================
   Container & Layout Grids
   ==================================================================== */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  flex: 1;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 16px;
}

/* ====================================================================
   Tabs Navigation
   ==================================================================== */
.tab-container {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 12px;
  flex-wrap: wrap;
}

.tab-btn {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #94A3B8;
  padding: 11px 24px;
  font-size: 0.96rem;
  font-family: inherit;
  font-weight: 700;
  cursor: pointer;
  border-radius: 12px;
  transition: all 0.25s ease;
}

.tab-btn:hover {
  color: #F8FAFC;
  border-color: rgba(56, 189, 248, 0.3);
}

.tab-btn.active {
  background: rgba(0, 229, 255, 0.15);
  color: #00E5FF;
  border-color: rgba(0, 229, 255, 0.4);
  box-shadow: 0 0 15px rgba(0, 229, 255, 0.15);
}

/* ====================================================================
   Footer
   ==================================================================== */
.footer {
  background: #040914;
  border-top: 1px solid rgba(56, 189, 248, 0.12);
  padding: 28px 24px;
  text-align: center;
  color: #64748B;
  font-size: 0.88rem;
  margin-top: auto;
}

.footer strong {
  color: #38BDF8;
}

/* ====================================================================
   Mobile Responsive Navigation
   ==================================================================== */
@media (max-width: 860px) {
  .navbar {
    padding: 0 20px;
    height: 64px;
    position: relative;
  }
  
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    right: 0;
    left: 0;
    background: #0B1426;
    border-bottom: 1px solid rgba(56, 189, 248, 0.25);
    flex-direction: column;
    padding: 16px 20px;
    gap: 10px;
    box-shadow: 0 15px 30px rgba(0,0,0,0.8);
    z-index: 1000;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li {
    width: 100%;
    display: block;
  }

  .nav-links a {
    display: block;
    width: 100%;
    text-align: right;
    padding: 12px 18px;
    box-sizing: border-box;
  }
}

@media (max-width: 600px) {
  .hero { padding: 30px 16px 20px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}