:root {
    --invoice-blue: #5C8095; 
    --invoice-blue-hover: #4a6a7c;
    --charcoal-dark: #1A252C; 
    --text-gray: #4A5568;
    --zen-green: #82C89B;     
    --bg-white: #FFFFFF;
    --soft-gray: #F4F7F6;
}

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

body { 
    font-family: 'Inter', sans-serif; 
    color: var(--charcoal-dark); 
    background: var(--soft-gray); 
    line-height: 1.6; 
    -webkit-font-smoothing: antialiased;
}

/* PREMIUM STICKY HEADER */
header { 
    padding: 20px 5%; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px); 
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.logo { 
    font-weight: 700; 
    font-size: 1.5rem; 
    letter-spacing: -0.5px; 
    color: var(--charcoal-dark);
}

.nav-btn { 
    background: var(--invoice-blue); 
    color: white; 
    padding: 12px 24px; 
    border-radius: 8px; 
    text-decoration: none; 
    font-weight: 600; 
    font-size: 0.95rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(92, 128, 149, 0.2);
}

.nav-btn:hover {
    background: var(--invoice-blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(92, 128, 149, 0.3);
}

/* HERO SECTION */
#hero { 
    padding: 140px 5% 100px; 
    text-align: center; 
    max-width: 900px; 
    margin: 0 auto; 
}

h1 { 
    font-size: 3.5rem; 
    margin-bottom: 25px; 
    letter-spacing: -1.5px; 
    line-height: 1.15; 
    color: var(--charcoal-dark);
}

#hero p { 
    font-size: 1.25rem; 
    color: var(--text-gray); 
    margin-bottom: 40px; 
    font-weight: 300;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-main { 
    display: inline-block; 
    background: var(--charcoal-dark); 
    color: white; 
    padding: 18px 40px; 
    font-size: 1.1rem; 
    border-radius: 8px; 
    text-decoration: none; 
    font-weight: 600; 
    transition: all 0.3s ease;
}

.cta-main:hover {
    background: #000;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.15);
}

/* SERVICES CARDS */
#services { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); 
    gap: 40px; 
    padding: 60px 5% 120px; 
    max-width: 1200px; 
    margin: 0 auto; 
}

.service-card {
    background: var(--bg-white);
    padding: 50px 40px;
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.04);
    transition: all 0.4s ease;
    border: 1px solid rgba(0,0,0,0.02);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.08);
}

.service-card h2 { 
    border-left: 4px solid var(--zen-green); 
    padding-left: 20px; 
    margin-bottom: 30px; 
    font-size: 1.5rem; 
    letter-spacing: -0.5px;
}

ul { list-style: none; }

li { 
    margin-bottom: 16px; 
    display: flex; 
    align-items: flex-start; 
    font-size: 1.05rem; 
    color: var(--text-gray);
}

li::before { 
    content: "✓"; 
    color: var(--invoice-blue); 
    font-weight: bold; 
    margin-right: 15px; 
    font-size: 1.1rem; 
}

/* FOOTER */
footer { 
    text-align: center; 
    padding: 60px 5%; 
    background: var(--bg-white); 
    border-top: 1px solid rgba(0,0,0,0.05);
}

.footer-contact { margin-bottom: 20px; font-weight: 600; font-size: 1.1rem; color: var(--charcoal-dark); }
.copyright { color: var(--text-gray); font-size: 0.95rem; }
.reg-details { font-size: 0.85rem; color: #888; margin-top: 20px; line-height: 1.8; }
.agency-tag { color: var(--invoice-blue); font-weight: 600; text-decoration: none; }

/* MOBILE RESPONSIVENESS */
@media (max-width: 768px) {
    header { padding: 15px 5%; }
    h1 { font-size: 2.3rem; }
    #hero { padding: 100px 5% 60px; }
    #hero p { font-size: 1.1rem; }
    .cta-main { width: 100%; text-align: center; }
    #services { grid-template-columns: 1fr; gap: 25px; padding: 40px 5% 80px; }
    .service-card { padding: 35px 25px; }
}

/* --- JS ANIMATION CLASSES --- */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}