/* style.css - "Clean Corporate & Secure" Design for Erith SecureShutter */

/* --- CSS Variables --- */
:root {
    --color-text-corp: #222529; /* Very Dark Grey */
    --color-background-corp: #FFFFFF; /* Pure White */
    --color-background-section-corp: #F0F2F5; /* Very Light Cool Grey */
    --color-primary-accent-corp: #002D62; /* Deep Navy Blue */
    --color-secondary-accent-corp: #B08D57; /* Antique Gold */
    --color-border-corp: #CED4DA; /* Light Neutral Grey for borders */
    
    /* System font stack for maximum performance */
    --font-family-corp: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    
    --container-max-width-corp: 1100px;
    --spacing-base-corp: 1rem; /* Approx 16px */
    --border-radius-corp: 4px; 
}

/* --- Global Resets & Base --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; line-height: 1.6; }
body {
    font-family: var(--font-family-corp);
    color: var(--color-text-corp);
    background-color: var(--color-background-corp);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

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

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

/* Accessibility: Skip Link */
.skip-link-corp { position: absolute; transform: translateY(-200%); left: 0.5rem; background: var(--color-secondary-accent-corp); color: white; padding: 0.6em 1.2em; z-index: 10001; text-decoration: none; transition: transform 0.3s ease-out; border-radius: 0 0 var(--border-radius-corp) 0; font-weight: 500; }
.skip-link-corp:focus { transform: translateY(0.5rem); }

/* Accessibility: Focus Styles */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
    outline: 2px solid var(--color-secondary-accent-corp);
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(176, 141, 87, 0.25); /* Gold glow */
}

/* --- Typography --- */
h1, h2, h3 {
    font-weight: 700; 
    line-height: 1.25;
    color: var(--color-primary-accent-corp); /* Deep Navy Blue for headings */
}
h1 { font-size: clamp(2rem, 5vw, 2.6rem); margin-bottom: var(--spacing-base-corp); }
h2 { font-size: clamp(1.6rem, 4vw, 2.1rem); margin-bottom: calc(var(--spacing-base-corp) * 2); text-align: center; }
h3 { font-size: clamp(1.2rem, 3vw, 1.35rem); margin-bottom: calc(var(--spacing-base-corp) * 0.6); color: var(--color-primary-accent-corp); font-weight: 600;}

/* --- Header --- */
.site-header-corp {
    background-color: var(--color-primary-accent-corp); /* Navy background */
    color: var(--color-background-corp); /* White text */
    padding: calc(var(--spacing-base-corp) * 0.9) 0;
    border-bottom: 3px solid var(--color-secondary-accent-corp); /* Gold accent border */
}
.header-content-corp { display: flex; justify-content: space-between; align-items: center; }
.logo-text-corp { font-size: clamp(1.4rem, 3.8vw, 1.65rem); font-weight: 700; color: var(--color-background-corp); text-decoration: none; }
.header-phone-corp { font-size: clamp(0.95rem, 2.5vw, 1.1rem); font-weight: 600; color: var(--color-secondary-accent-corp); text-decoration: none; }
.header-phone-corp:hover { color: #CAA870; /* Lighter Gold on hover */ }

/* --- Hero Section --- */
.hero-corp {
    background-color: var(--color-background-section-corp); /* Light grey background */
    color: var(--color-text-corp); 
    padding: calc(var(--spacing-base-corp) * 3.5) 0; 
    text-align: center;
}
.hero-corp h1 { color: var(--color-primary-accent-corp); }
.hero-subtext-corp { font-size: clamp(1.1rem, 3vw, 1.2rem); margin-bottom: calc(var(--spacing-base-corp) * 1.8); max-width: 700px; margin-left: auto; margin-right: auto; color: var(--color-text-corp); opacity: 0.9;}
.hero-actions-corp { margin-top: calc(var(--spacing-base-corp) * 2); }

/* --- Buttons --- */
.button-corp {
    display: inline-block;
    padding: calc(var(--spacing-base-corp) * 0.8) calc(var(--spacing-base-corp) * 1.8); 
    text-decoration: none;
    border-radius: var(--border-radius-corp);
    font-weight: 600; 
    transition: background-color 0.2s ease, color 0.2s ease, transform 0.15s ease-out, border-color 0.2s ease;
    cursor: pointer;
    border: 2px solid transparent;
    font-size: clamp(0.95rem, 2.5vw, 1.05rem);
    text-align: center;
}
.button-accent-corp {
    background-color: var(--color-secondary-accent-corp); 
    color: var(--color-background-corp); 
    border-color: var(--color-secondary-accent-corp);
}
.button-accent-corp:hover, .button-accent-corp:focus {
    background-color: #A37B4C; /* Darker Gold/Bronze */
    border-color: #A37B4C;
    transform: translateY(-1px);
}
/* No explicit secondary button style in this design, main buttons are accent */

/* --- Services Section --- */
.services-corp { padding: calc(var(--spacing-base-corp) * 3) 0; background-color: var(--color-background-corp); }
.services-grid-corp { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: calc(var(--spacing-base-corp) * 1.5); }
.service-block-corp {
    background-color: var(--color-background-corp); 
    padding: calc(var(--spacing-base-corp) * 1.5);
    border: 1px solid var(--color-border-corp);
    border-radius: var(--border-radius-corp);
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}
.service-block-corp p { font-size: clamp(0.9rem, 2.5vw, 0.95rem); line-height: 1.6; }

/* --- Why Choose Us Section --- */
.why-choose-us-corp { padding: calc(var(--spacing-base-corp) * 3) 0; background-color: var(--color-background-section-corp); }
.benefits-list-corp { 
    list-style: none; padding: 0; 
    max-width: 750px; margin: 0 auto;
    display: grid; grid-template-columns: 1fr; /* Single column for a clean list */
    gap: calc(var(--spacing-base-corp) * 0.8);
}
.benefits-list-corp li {
    font-size: clamp(1rem, 2.8vw, 1.1rem); 
    color: var(--color-text-corp); 
    padding-left: calc(var(--spacing-base-corp) * 1.8); position: relative;
    padding-top: calc(var(--spacing-base-corp) * 0.3);
    padding-bottom: calc(var(--spacing-base-corp) * 0.3);
}
.benefits-list-corp li::before {
    content: '✓'; position: absolute; left: 0; top: 6px; 
    color: var(--color-secondary-accent-corp); font-size: 1.2em; font-weight: 700;
}

/* --- Feature Image Section --- */
.feature-image-area-corp { padding: calc(var(--spacing-base-corp) * 2.5) 0; background-color: var(--color-background-corp); text-align: center; }
.feature-image-corp {
    display: block;
    max-width: 100%;
    height: auto;
    width: 100%; 
    max-width: 600px; 
    border-radius: var(--border-radius-corp);
    box-shadow: 0 6px 12px rgba(0,0,0,0.07);
    margin: 0 auto calc(var(--spacing-base-corp) * 1) auto;
}
.feature-image-caption-corp { font-size: clamp(0.9rem, 2.5vw, 0.95rem); color: var(--color-text-corp); opacity: 0.8; }

/* --- Final CTA Section --- */
.cta-final-corp { padding: calc(var(--spacing-base-corp) * 3) 0; background-color: var(--color-primary-accent-corp); color: var(--color-background-corp); text-align: center; }
.cta-final-corp h2 { color: var(--color-background-corp); }
.cta-final-corp p { font-size: 1.05rem; margin-bottom: calc(var(--spacing-base-corp) * 1.5); max-width: 600px; margin-left: auto; margin-right: auto; opacity: 0.9; }

/* --- Footer --- */
.site-footer-corp {
    background-color: var(--color-text-corp); /* Dark text color as footer bg */
    color: var(--color-background-corp); /* White text */
    text-align: center;
    padding: calc(var(--spacing-base-corp) * 1.8) 0;
    margin-top: auto; 
    font-size: clamp(0.85rem, 2.2vw, 0.9rem);
}
.site-footer-corp p { margin-bottom: calc(var(--spacing-base-corp) * 0.4); opacity: 0.85; }
.footer-link-corp { color: var(--color-secondary-accent-corp); text-decoration: none; font-weight: 500; }
.footer-link-corp:hover { text-decoration: underline; }

/* --- Sticky CTA for Mobile --- */
.sticky-cta-corp-mobile {
    display: none; position: fixed; bottom: 0; left: 0; width: 100%;
    background-color: var(--color-secondary-accent-corp); color: var(--color-background-corp); text-align: center;
    padding: calc(var(--spacing-base-corp) * 0.9) 0; font-size: clamp(1rem, 3vw, 1.15rem); font-weight: 700;
    text-decoration: none; z-index: 1000; box-shadow: 0 -2px 6px rgba(0,0,0,0.15);
}

/* --- Responsive Design Adjustments --- */
@media (max-width: 767px) {
    .header-content-corp { flex-direction: column; text-align: center;}
    .logo-text-corp { margin-bottom: calc(var(--spacing-base-corp) * 0.5); }
    .sticky-cta-corp-mobile { display: block; }
    body { padding-bottom: 55px; } 
    h1 { font-size: clamp(1.8rem, 5vw, 2.2rem); }
    h2 { font-size: clamp(1.5rem, 4vw, 1.8rem); }
}

@media (min-width: 768px) {
    .benefits-list-corp {
        grid-template-columns: repeat(2, 1fr); /* Two columns for benefits on larger screens */
        gap: calc(var(--spacing-base-corp) * 1.2);
    }
}