/* style.css - "Ultra-Modern & Efficient" Design for ShutterResponse UK */

/* --- Google Fonts (Imported in HTML) --- */
/* font-family: 'Inter', sans-serif; */

/* --- CSS Variables (Modern Approach) --- */
:root {
    --color-text: #262626; /* Dark Charcoal */
    --color-background: #FFFFFF;
    --color-background-alt: #F4F6F8; /* Very Light Cool Grey */
    --color-primary-structure: #D1D5DB; /* Medium Grey */
    --color-accent: #007AFF; /* Electric Blue */
    --color-header-bg: #FFFFFF;
    --color-header-text: var(--color-text);
    --color-footer-bg: var(--color-background-alt);
    --color-footer-text: var(--color-text);

    --font-body: 'Inter', Arial, sans-serif;
    --font-heading: 'Inter', Arial, sans-serif; /* Using Inter for headings too for consistency */

    --container-width: 90%;
    --container-max-width: 1100px;
    --border-radius: 4px;
}

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

.main-wrapper-um {
    flex-grow: 1; /* Allows footer to stick to bottom */
}

.container-um {
    width: var(--container-width);
    max-width: var(--container-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

/* Accessibility: Skip Link */
.skip-link {
    position: absolute;
    top: -40px; /* Hide off-screen */
    left: 0;
    background: var(--color-accent);
    color: white;
    padding: 8px;
    z-index: 10000; /* Ensure it's on top */
    text-decoration: none;
}
.skip-link:focus {
    top: 0; /* Show on focus */
}

/* Accessibility: Focus Styles */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.3);
}

/* --- Header --- */
.site-header-um {
    background-color: var(--color-header-bg);
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-primary-structure);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    position: sticky; top: 0; z-index: 1000;
}
.site-header-um .container-um { display: flex; justify-content: space-between; align-items: center; }
.logo-text-um { font-size: 1.5rem; font-weight: 800; color: var(--color-text); text-decoration: none; }
.header-contact-um { font-size: 1.1rem; font-weight: 500; color: var(--color-accent); text-decoration: none; }
.header-contact-um:hover { text-decoration: underline; }

/* --- Hero Section --- */
.hero-um {
    background-color: var(--color-accent); 
    color: var(--color-background); 
    padding: 4rem 0; 
    text-align: center;
}
.hero-content-um h1 {
    font-size: 2.5rem; /* Responsive - see media queries */
    color: var(--color-background);
    margin-bottom: 1rem;
    font-weight: 800; /* Extra bold */
    line-height: 1.2;
}
.hero-sub-um { font-size: 1.2rem; margin-bottom: 2rem; max-width: 700px; margin-left: auto; margin-right: auto; opacity: 0.9; }
.hero-cta-um { margin-top: 1.5rem; }

/* --- Buttons --- */
.button-um {
    display: inline-block;
    padding: 0.75rem 1.75rem; 
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 700; 
    font-family: var(--font-heading);
    transition: background-color 0.2s ease-in-out, transform 0.2s ease-in-out;
    cursor: pointer;
    border: 2px solid transparent;
    font-size: 1rem;
    text-align: center;
}
.button-um-accent {
    background-color: var(--color-background); 
    color: var(--color-accent); 
    border-color: var(--color-background);
}
.button-um-accent:hover, .button-um-accent:focus {
    background-color: #e6f2ff; /* Lighter version of accent for hover on white */
    transform: translateY(-2px);
}
.button-um-secondary {
    background-color: transparent;
    color: var(--color-accent); 
    border-color: var(--color-accent);
}
.button-um-secondary:hover, .button-um-secondary:focus {
    background-color: var(--color-accent);
    color: var(--color-background);
}

/* --- Services Section --- */
.services-um { padding: 3.5rem 0; background-color: var(--color-background-alt); }
.services-um h2 { text-align: center; font-size: 2rem; color: var(--color-text); margin-bottom: 2.5rem; font-weight: 700; }
.services-grid-um { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; }
.service-card-um {
    background-color: var(--color-background);
    padding: 1.75rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    border: 1px solid var(--color-primary-structure);
    display: flex;
    flex-direction: column;
}
.service-title-um { font-size: 1.25rem; color: var(--color-accent); margin-bottom: 0.75rem; font-weight: 700; }
.service-card-um p { font-size: 0.95rem; color: var(--color-text); line-height: 1.6; flex-grow: 1; }

/* --- Feature Image Section --- */
.feature-image-um { padding: 3rem 0; background-color: var(--color-background); text-align: center; }
.feature-image-um figure { margin: 0; }
.image-responsive-um {
    display: block;
    max-width: 100%;
    height: auto;
    width: 100%; /* Make it responsive */
    max-width: 700px; /* Cap its size */
    margin: 0 auto 1rem auto; /* Center it */
    border-radius: var(--border-radius);
    box-shadow: 0 6px 15px rgba(0,0,0,0.1);
}
.feature-image-um figcaption { font-size: 0.9rem; color: #6c757d; font-style: italic; }

/* --- Why Choose Us Section --- */
.why-choose-um { padding: 3.5rem 0; background-color: var(--color-background-alt); }
.why-choose-um h2 { text-align: center; font-size: 2rem; color: var(--color-text); margin-bottom: 2.5rem; font-weight: 700; }
.benefits-grid-um {
    list-style: none; padding: 0;
    display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem; max-width: 900px; margin: 0 auto 2rem auto;
}
.benefits-grid-um li {
    font-size: 1rem; color: var(--color-text);
    background-color: var(--color-background);
    padding: 1rem; border-radius: var(--border-radius);
    border-left: 4px solid var(--color-accent);
}
.cta-secondary-um { text-align: center; margin-top: 1.5rem; }

/* --- Footer --- */
.site-footer-um {
    background-color: var(--color-footer-bg);
    color: var(--color-footer-text);
    text-align: center;
    padding: 2rem 0;
    margin-top: auto; /* Pushes footer to bottom if content is short */
    border-top: 1px solid var(--color-primary-structure);
}
.site-footer-um p { margin-bottom: 0.5rem; font-size: 0.9rem; }
.footer-link-um { color: var(--color-accent); text-decoration: none; }
.footer-link-um:hover { text-decoration: underline; }

/* --- Sticky CTA for Mobile --- */
.sticky-cta-um {
    display: none; position: fixed; bottom: 0; left: 0; width: 100%;
    background-color: var(--color-accent); color: var(--color-background); text-align: center;
    padding: 0.9rem 0; font-size: 1.1rem; font-weight: 700;
    text-decoration: none; z-index: 1001; box-shadow: 0 -2px 5px rgba(0,0,0,0.1);
}

/* --- Responsive Design --- */
@media (min-width: 768px) {
    .hero-content-um h1 { font-size: 3rem; }
    .hero-sub-um { font-size: 1.35rem; }
    .services-um h2, .why-choose-um h2 { font-size: 2.25rem; }
    .service-title-um { font-size: 1.35rem; }
    .button-um { font-size: 1.05rem; padding: 0.85rem 2rem;}
}

@media (max-width: 767px) {
    .hero-content-um h1 { font-size: 2rem; }
    .hero-sub-um { font-size: 1.1rem; }
    .services-um h2, .why-choose-um h2 { font-size: 1.75rem; }
    .service-title-um { font-size: 1.2rem; }
    .sticky-cta-um { display: block; }
    body { padding-bottom: 55px; } 
    .site-header-um .container-um { flex-direction: column; text-align: center;}
    .logo-text-um { margin-bottom: 0.5rem; font-size: 1.4rem; }
    .header-contact-um { font-size: 1rem; }
}