@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700;800&display=swap');

:root {
  /* =========================================
     1. BRAND COLOR PALETTE
     ========================================= */
  --space-grey:   #2D3142; 
  --atmosphere:   #787878; 
  --light-slate:  #898989; 
  --lunar-silver: #F4F5F7; 
  --cyan-energy:  #52c8ec; 
  --pure-white:   #FFFFFF;
  --border-light: #E5E7EB; 

  /* Image Overlays */
  --overlay-dark:  rgba(45, 49, 66, 0.85);  
  --overlay-cyan:  rgba(82, 200, 236, 0.70);

  /* Typography */
  --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
  
  /* Shadows */
  --shadow-sm:       0 4px 6px rgba(0,0,0,0.02);  
  --shadow-hover:    0 10px 25px rgba(0,0,0,0.08); 
  --shadow-floating: 0 10px 25px rgba(0,0,0,0.20); 
  --shadow-cyan:     0 10px 20px rgba(82, 200, 236, 0.3); 

  /* Border Radius */
  --radius-sm:   6px;   
  --radius-md:   12px;  
  --radius-lg:   16px;  
  --radius-pill: 50px;  
}

/* =========================================
   BASE STYLES
   ========================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-primary);
    color: var(--space-grey);
    background-color: var(--pure-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
p { color: var(--atmosphere); margin-bottom: 1rem; }
h1, h2, h3, h4 { color: var(--space-grey); font-weight: 800; line-height: 1.2; }
.text-accent { color: var(--cyan-energy); }
.text-center { text-align: center; }
.mt-2 { margin-top: 2rem; }

/* =========================================
   LAYOUT UTILITIES
   ========================================= */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section { padding: 6rem 0; }
.bg-lunar { background-color: var(--lunar-silver); }

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

/* =========================================
   BUTTONS
   ========================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.8rem;
    border-radius: var(--radius-pill);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary {
    background: var(--cyan-energy);
    color: var(--pure-white);
    box-shadow: var(--shadow-cyan);
}
.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(82, 200, 236, 0.4);
}

.btn-secondary {
    background: var(--space-grey);
    color: var(--pure-white);
}
.btn-secondary:hover { background: #1a1c26; transform: translateY(-3px); }

.btn-outline {
    border: 2px solid var(--space-grey);
    color: var(--space-grey);
    background: transparent;
}
.btn-outline:hover {
    background: var(--space-grey);
    color: var(--pure-white);
}

/* =========================================
   NAVIGATION (RESPONSIVE)
   ========================================= */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-light);
    padding: 1rem 0;
}

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

.brand-logo { max-height: 40px; }

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--space-grey);
    transition: color 0.3s;
}

.nav-links a:hover { color: var(--cyan-energy); }
.menu-toggle { display: none; background: none; border: none; cursor: pointer; color: var(--space-grey); }

/* =========================================
   HERO SECTION
   ========================================= */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    background: url('../activepure.jpg') center/cover no-repeat;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: var(--overlay-dark);
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 800px;
    padding: 2rem 0;
}

.hero-title {
    color: var(--pure-white);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.hero-title span { color: var(--cyan-energy); }

.hero-subtitle {
    color: var(--lunar-silver);
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    margin-bottom: 2.5rem;
    max-width: 700px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero .btn-outline {
    border-color: var(--pure-white);
    color: var(--pure-white);
}

.hero .btn-outline:hover {
    background: var(--pure-white);
    color: var(--space-grey);
}

/* =========================================
   TRUST BAR
   ========================================= */
.trust-bar {
    background: var(--pure-white);
    padding: 2rem 0;
    border-bottom: 1px solid var(--border-light);
}

.trust-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.trust-text {
    font-weight: 600;
    color: var(--light-slate);
    margin: 0;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.trust-logos {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.badge {
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-sm);
    background: var(--lunar-silver);
    color: var(--space-grey);
    font-size: 0.8rem;
    font-weight: 700;
}

/* =========================================
   PROBLEM VS SOLUTION (SPLIT CONTENT)
   ========================================= */
.split-layout {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.split-layout > div { flex: 1; }

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1.5rem;
}

/* =========================================
   PRODUCT CARDS
   ========================================= */
.product-card {
    background: var(--pure-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid var(--lunar-silver);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--cyan-energy);
}

.card-image {
    height: 250px;
    background-color: var(--lunar-silver);
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
}

.card-body {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-body h3 { font-size: 1.5rem; margin-bottom: 0.5rem; }
.card-body p { flex-grow: 1; font-size: 0.95rem; }

.product-badge {
    display: inline-block;
    align-self: flex-start;
    padding: 0.3rem 0.8rem;
    background: rgba(82, 200, 236, 0.1);
    color: var(--cyan-energy);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-top: 1rem;
}

/* =========================================
   FOOTER
   ========================================= */
.footer {
    background: var(--space-grey);
    padding: 5rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand p { color: var(--light-slate); margin-top: 1rem; max-width: 300px; }
.footer h4 { color: var(--pure-white); margin-bottom: 1.5rem; font-size: 1.1rem; }
.footer-links { display: flex; flex-direction: column; gap: 0.8rem; }
.footer-links a { color: var(--light-slate); transition: 0.3s; font-weight: 400; }
.footer-links a:hover { color: var(--cyan-energy); }
.disclaimer { font-size: 0.8rem; color: #555; }

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--light-slate);
    font-size: 0.9rem;
}

/* =========================================
   MEDIA QUERIES (MOBILE OPTIMIZATION)
   ========================================= */
@media (max-width: 992px) {
    .split-layout { flex-direction: column; text-align: center; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    /* Mobile Nav */
    .menu-toggle { display: block; }
    
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--pure-white);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-floating);
        gap: 1.5rem;
        border-top: 1px solid var(--border-light);
        display: none; /* Hide by default on mobile */
    }

    .nav-links.active { display: flex; }
    
    .hero-title { text-align: center; }
    .hero-subtitle { text-align: center; }
    .hero-actions { justify-content: center; width: 100%; flex-direction: column; }
    .hero-actions .btn { width: 100%; }
    
    .trust-bar .container { flex-direction: column; justify-content: center; }
    .badges { justify-content: center; }
    
    .footer-grid { grid-template-columns: 1fr; text-align: center; }
    .footer-brand p { margin: 1rem auto; }
}