/* GLOBAL RESET & VARIABLES (LIGHT THEME) */
:root {
    --primary-color: #ff5722; /* Thermal Orange */
    --primary-hover: #e64a19;
    --bg-main: #ffffff;       /* Pure White */
    --bg-section: #f8f9fa;    /* Very Light Gray for alternative sections */
    --bg-card: #ffffff;
    --text-main: #1a1a1a;     /* Dark Charcoal */
    --text-muted: #555555;    /* Medium Gray */
    --border-color: #e0e0e0;
    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.08);
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-main);
    line-height: 1.6;
}

a { text-decoration: none; color: inherit; transition: 0.3s; }
ul { list-style: none; }

/* UTILITY CLASSES */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 4px;
    font-weight: 700;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--text-main);
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: var(--text-main);
    color: white;
}

/* HEADER & NAV */
header {
    background-color: #ffffff;
    height: 80px;
    width: 100%;
    position: fixed;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
}

nav {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    margin-right: auto; /* Pushes nav links to the right */
    padding-right: 40px; /* Safety buffer */
}

.logo span { color: var(--primary-color); }

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
    margin: 0;
}

.nav-links li {
    display: flex;
    align-items: center;
}

.nav-links a:not(.btn) {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-main);
}

.nav-links a:not(.btn):hover { color: var(--primary-color); }

/* HERO SECTION */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
    background-color: var(--bg-main);
}

.hero-content {
    width: 50%;
    padding-right: 50px;
    z-index: 2;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 20px;
    font-weight: 800;
    color: var(--text-main);
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 30px;
}

.hero-buttons { display: flex; gap: 15px; }

/* HERO IMAGES */
.hero-image-container {
    position: absolute;
    right: 0;
    top: 0;
    width: 50%;
    height: 100%;
    background-size: cover;
    background-position: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Gradient fades to White */
    background: linear-gradient(90deg, #ffffff 0%, rgba(255,255,255,0.2) 100%);
}

/* SECTION: GENERAL STYLES */
.roi-section, .services-section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--text-main);
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* CARDS & GRIDS */
.roi-grid, .services-grid {
    display: grid;
    gap: 30px;
}

.roi-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.services-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.roi-card, .service-card {
    background: var(--bg-card);
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow-card);
    border: 1px solid transparent;
    transition: 0.3s;
}

.roi-card { border-left: 4px solid var(--primary-color); }

.service-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.roi-card h3, .service-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--text-main);
}

.roi-card p, .service-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.service-link {
    display: inline-block;
    margin-top: 15px;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
}

/* FOOTER */
footer {
    padding: 50px 0;
    background: #1a1a1a;
    color: #b0b0b0;
    text-align: center;
    font-size: 0.9rem;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .hero { flex-direction: column; height: auto; padding-top: 120px; }
    .hero-content { width: 100%; padding: 0 20px 60px; text-align: center; }
    .hero-image-container { position: relative; width: 100%; height: 300px; }
    .hero-overlay { background: linear-gradient(180deg, #ffffff 0%, rgba(255,255,255,0) 100%); }
    .hero-buttons { justify-content: center; }
    
    header { height: auto; padding: 15px 0; }
    nav { flex-direction: column; gap: 15px; }
    .logo { margin-right: 0; padding-right: 0; }
    .nav-links { flex-direction: column; display: none; } /* Hidden on mobile */
}