/* style.css - "Industrial Modern - Focused & Fast" Design */

/* --- CSS Variables --- */
:root {
    --color-text-rdf: #212529; /* Dark Charcoal/Near Black */
    --color-background-rdf: #E9ECEF; /* Light Industrial Grey */
    --color-background-card-rdf: #FFFFFF; /* White for cards/content areas */
    --color-primary-accent-rdf: #4682B4; /* Steel Blue */
    --color-secondary-accent-rdf: #FFA500; /* Warning/Signal Orange */
    --color-secondary-accent-hover-rdf: #E69500; /* Darker Orange */
    --color-text-on-accent-rdf: #212529; /* Dark text for orange CTAs */
    --color-text-on-primary-rdf: #FFFFFF; /* White text for blue hero */
    --color-border-rdf: #ADB5BD; /* Medium Grey for borders */
    
    /* System font stack for maximum performance */
    --font-family-rdf: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    
    --container-max-width-rdf: 1100px; 
    --spacing-base-rdf: 1rem; 
    --border-radius-rdf: 3px; /* Slightly rounded for a modern industrial look */
}

/* --- Global Resets & Base --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; line-height: 1.65; }
body {
    font-family: var(--font-family-rdf);
    color: var(--color-text-rdf);
    background-color: var(--color-background-rdf);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-content-rdf { flex-grow: 1; }

.container-rdf {
    width: 90%;
    max-width: var(--container-max-width-rdf);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-base-rdf);
    padding-right: var(--spacing-base-rdf);
}

/* Accessibility: Skip Link */
.skip-link-rdf { 
    position: absolute; 
    transform: translateY(-250%); 
    left: 0.5rem; 
    background: var(--color-secondary-accent-rdf); 
    color: var(--color-text-on-accent-rdf); 
    padding: 0.6em 1.2em; 
    z-index: 10001; 
    text-decoration: none; 
    transition: transform 0.25s ease-out; 
    font-weight: 600;
    border-radius: 0 0 var(--border-radius-rdf) var(--border-radius-rdf);
}
.skip-link-rdf:focus { transform: translateY(0.5rem); }

/* Accessibility: Focus Styles */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
    outline: 2.5px solid var(--color-secondary-accent-rdf); 
    outline-offset: 2px;
}

/* --- Typography --- */
h1, h2, h3 {
    font-family: var(--font-family-rdf); 
    font-weight: 700; 
    line-height: 1.2;
    color: var(--color-primary-accent-rdf); /* Steel Blue for headings */
    margin-bottom: calc(var(--spacing-base-rdf) * 1.3);
}
.logo-text-rdf { 
    font-family: var(--font-family-rdf);
    font-weight: 800; 
    color: var(--color-primary-accent-rdf);
    text-transform: uppercase;
    letter-spacing: 1px;
}
h1 { font-size: clamp(2rem, 5.5vw, 2.6rem); text-transform: uppercase; }
h2 { font-size: clamp(1.7rem, 4.5vw, 2.2rem); text-align: center; margin-bottom: calc(var(--spacing-base-rdf) * 2.2); border-bottom: 2px solid var(--color-primary-accent-rdf); padding-bottom: calc(var(--spacing-base-rdf)*0.75); display: inline-block;}
.services-rdf h2, .why-choose-us-rdf h2 {display: block; text-align: center;} /* Center block level H2s */
h3 { font-size: clamp(1.2rem, 3.2vw, 1.4rem); color: var(--color-primary-accent-rdf); font-weight: 700; margin-bottom: calc(var(--spacing-base-rdf) * 0.7); }

/* --- Header --- */
.site-header-rdf { 
    background-color: var(--color-background-card-rdf); /* White header */
    padding: calc(var(--spacing-base-rdf) * 1) 0;
    border-bottom: 2px solid var(--color-primary-accent-rdf); /* Steel Blue line */
}
.header-flex-rdf { display: flex; justify-content: space-between; align-items: center; } 
.logo-text-rdf { font-size: clamp(1.45rem, 4vw, 1.7rem); text-decoration: none; }
.header-phone-rdf { font-size: clamp(1rem, 2.8vw, 1.15rem); font-weight: 700; color: var(--color-secondary-accent-rdf); text-decoration: none; }
.header-phone-rdf:hover { color: var(--color-secondary-accent-hover-rdf); }

/* --- Hero Section --- */
.hero-rdf { 
    background-color: var(--color-primary-accent-rdf); /* Steel Blue background */
    color: var(--color-text-on-primary-rdf); /* White text */
    padding: calc(var(--spacing-base-rdf) * 4) 0; 
    text-align: center;
}
.hero-rdf h1 { color: var(--color-text-on-primary-rdf); }
.hero-subtitle-rdf { font-size: clamp(1.15rem, 3vw, 1.3rem); margin-bottom: calc(var(--spacing-base-rdf) * 1.8); max-width: 720px; margin-left: auto; margin-right: auto; opacity: 0.95; line-height: 1.6;}
.hero-actions-rdf { margin-top: calc(var(--spacing-base-rdf) * 2); } 

/* --- Buttons --- */
.button-rdf { 
    display: inline-block;
    padding: calc(var(--spacing-base-rdf) * 0.9) calc(var(--spacing-base-rdf) * 2); 
    text-decoration: none;
    border-radius: var(--border-radius-rdf);
    font-weight: 700; 
    font-family: var(--font-family-rdf);
    transition: background-color 0.2s ease, color 0.2s ease, transform 0.15s ease-out, box-shadow 0.2s ease;
    cursor: pointer;
    border: 2px solid transparent;
    font-size: clamp(1rem, 2.5vw, 1.1rem);
    text-align: center;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}
.button-accent-rdf { 
    background-color: var(--color-secondary-accent-rdf); /* Orange */
    color: var(--color-text-on-accent-rdf); /* Dark text on orange */
    border-color: var(--color-secondary-accent-rdf);
    box-shadow: 0 3px 5px rgba(0,0,0,0.1);
}
.button-accent-rdf:hover, .button-accent-rdf:focus {
    background-color: var(--color-secondary-accent-hover-rdf); 
    border-color: var(--color-secondary-accent-hover-rdf);
    transform: translateY(-2px);
    box-shadow: 0 5px 8px rgba(0,0,0,0.15);
}
.button-secondary-rdf { 
    background-color: transparent;
    color: var(--color-secondary-accent-rdf); 
    border-color: var(--color-secondary-accent-rdf); 
}
.button-secondary-rdf:hover, .button-secondary-rdf:focus {
    background-color: var(--color-secondary-accent-rdf);
    color: var(--color-text-on-accent-rdf);
}

/* --- Services Section --- */
.services-rdf { padding: calc(var(--spacing-base-rdf) * 3.5) 0; background-color: var(--color-background-card-rdf); } 
.section-intro-rdf { text-align:center; max-width:750px; margin:-1.5rem auto 2.5rem auto; color: var(--color-text-rdf); opacity: 0.95;}
.services-grid-rdf { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: calc(var(--spacing-base-rdf) * 1.8); } 
.service-card-rdf { 
    background-color: var(--color-background-rdf); /* Light grey cards on white section */
    padding: calc(var(--spacing-base-rdf) * 1.6);
    border: 1px solid var(--color-border-rdf);
    border-radius: var(--border-radius-rdf);
    box-shadow: 0 2px 4px rgba(0,0,0,0.03); /* Very subtle shadow */
}
.service-card-title-rdf { font-weight: 700; } 
.service-card-rdf p { font-size: clamp(0.9rem, 2.5vw, 0.95rem); line-height: 1.65; }

/* --- Why Choose Us Section --- */
.why-choose-us-rdf { padding: calc(var(--spacing-base-rdf) * 3.5) 0; background-color: var(--color-background-card-rdf); } 
.why-choose-us-rdf h2 { color: var(--color-primary-accent-rdf); border-color: var(--color-primary-accent-rdf); }
.benefits-list-rdf { 
    list-style: none; padding: 0; 
    max-width: 800px; margin: 0 auto calc(var(--spacing-base-rdf) * 2.2) auto;
    columns: 1;
}
@media (min-width: 600px) { 
    .benefits-list-rdf { columns: 2; column-gap: calc(var(--spacing-base-rdf) * 2.5); }
}
.benefits-list-rdf li {
    font-size: clamp(1rem, 2.8vw, 1.05rem); 
    color: var(--color-text-rdf); 
    margin-bottom: calc(var(--spacing-base-rdf) * 1);
    padding-left: calc(var(--spacing-base-rdf) * 2);
    position: relative;
    break-inside: avoid-column; 
}
.benefits-list-rdf strong { color: var(--color-primary-accent-rdf); }
.benefits-list-rdf li::before {
    content: '»'; 
    position: absolute; left: 0; top: 1px; /* Adjusted for system font */
    color: var(--color-secondary-accent-rdf); /* Orange arrow */
    font-size: 1.3em; 
    font-weight: 700;
}
.why-cta-rdf { text-align: center; } 

/* --- Feature Image Section --- */
.feature-image-section-rdf { padding: calc(var(--spacing-base-rdf) * 3) 0; background-color: var(--color-background-rdf); } 
.feature-content-rdf { 
    display: flex; 
    flex-wrap: wrap; 
    align-items: center; 
    gap: calc(var(--spacing-base-rdf) * 2);
    background-color: var(--color-background-card-rdf);
    padding: calc(var(--spacing-base-rdf) * 2);
    border: 1px solid var(--color-border-rdf);
    border-radius: var(--border-radius-rdf);
}
.feature-img-rdf {
    display: block;
    max-width: 100%;
    height: auto;
    width: 100%; 
    max-width: 600px; 
    border-radius: var(--border-radius-rdf);
    box-shadow: 0 5px 10px rgba(0,0,0,0.06);
    margin-bottom: var(--spacing-base-rdf); 
}
.feature-text-rdf { flex: 1; min-width: 280px; text-align: left;} 
.feature-text-rdf h3 { color: var(--color-primary-accent-rdf); margin-bottom: calc(var(--spacing-base-rdf)*0.6); font-size: 1.8rem; text-align: left; border: none; padding-bottom:0;} /* Override h2 style */
.feature-text-rdf p { margin-bottom: calc(var(--spacing-base-rdf) * 1.2); font-size: 1.05rem; }
.feature-caption-rdf { display:block; margin-top: calc(var(--spacing-base-rdf) * 0.8); font-size: clamp(0.9rem, 2.5vw, 0.95rem); color: var(--color-text-rdf); opacity: 0.85; text-align: center; }


/* --- Footer --- */
.site-footer-rdf { 
    background-color: var(--color-primary-accent-rdf); /* Steel Blue footer */
    color: var(--color-text-on-primary-rdf); /* White text */
    text-align: center;
    padding: calc(var(--spacing-base-rdf) * 2.2) 0;
    margin-top: auto; 
}
.site-footer-rdf p { margin-bottom: calc(var(--spacing-base-rdf) * 0.5); font-size: clamp(0.9rem, 2.2vw, 0.95rem); opacity: 0.95;}
.footer-link-rdf { color: var(--color-secondary-accent-rdf); text-decoration: none; font-weight: 600; } 
.footer-link-rdf:hover { text-decoration: underline; }
.footer-nav-rdf { margin-top: var(--spacing-base-rdf); } 

/* EXTREMELY SUBTLE FOOTER LINK FOR service-directory.html */
.footer-directory-link-rdf { 
    font-size: 0.6rem !important; /* Very small */
    color: #3A72A0 !important;     /* Very dark blue, extremely low contrast against #4682B4 footer bg */
    text-decoration: none !important;
    opacity: 0.25 !important;      /* Make it very faint */
    display: inline-block !important; 
    padding: 1px 0 !important; 
    margin: 0 !important; 
    letter-spacing: 0.1px;
    transition: opacity 0.1s ease;
}
.footer-directory-link-rdf:hover {
    opacity: 0.35 !important;      
    text-decoration: none !important; 
    color: #407BB0 !important; 
}
.footer-directory-link-rdf:focus-visible { 
    position: relative; 
    z-index: 1;
    opacity: 1 !important;        
    text-decoration: underline !important; 
    color: var(--color-secondary-accent-rdf) !important; /* Orange to pop on dark background */
    background-color: var(--color-primary-accent-rdf) !important; /* Footer background for contrast */
    outline: 2px solid var(--color-secondary-accent-rdf) !important; 
    outline-offset: 2px !important;
    font-size: 0.75rem !important; 
    padding: 2px 4px !important;
    border-radius: 2px; 
}


/* --- Sticky CTA for Mobile --- */
.sticky-cta-rdf-mobile { 
    display: none; position: fixed; bottom: 0; left: 0; width: 100%;
    background-color: var(--color-secondary-accent-rdf); color: var(--color-text-on-accent-rdf); text-align: center;
    padding: calc(var(--spacing-base-rdf) * 0.95) 0; font-size: clamp(1rem, 3vw, 1.15rem); font-weight: 700;
    text-decoration: none; z-index: 1000; box-shadow: 0 -2px 6px rgba(0,0,0,0.12);
    text-transform: uppercase;
}

/* --- Responsive Design Adjustments --- */
@media (max-width: 767px) {
    .header-flex-rdf { flex-direction: column; text-align: center;}
    .logo-text-rdf { margin-bottom: calc(var(--spacing-base-rdf) * 0.75); }
    .header-phone-rdf { margin-top: calc(var(--spacing-base-rdf)*0.3); }
    .sticky-cta-rdf-mobile { display: block; }
    body { padding-bottom: 60px; } 
    h1 { font-size: clamp(1.9rem, 5.5vw, 2.4rem); }
    h2 { font-size: clamp(1.6rem, 4.5vw, 2rem); }
    .feature-content-rdf { flex-direction: column; text-align: center; }
    .feature-img-rdf { margin-bottom: var(--spacing-base-rdf); margin-right: 0; }
}

@media (min-width: 768px) {
    .feature-content-rdf { text-align: left; }
    .services-grid-rdf { grid-template-columns: repeat(2, 1fr); } 
}