/*
 * Core styles for the Printer Support Hub
 * This stylesheet defines the color palette, typography, layout
 * and responsive behaviours for the site. It adheres to WCAG
 * accessibility guidelines and ensures the content is legible
 * across devices.
 */

/* CSS variables for colours and sizing */
:root {
    --color-midnight: #0F172A;
    --color-slate:    #334155;
    --color-gray:     #CBD5E1;
    --color-white:    #FFFFFF;
    --color-blue:     #3B82F6;
    --color-green:    #10B981;
    --color-amber:    #F59E0B;
    --color-red:      #EF4444;
    --font-base:      "Arial", sans-serif;
    --transition:     0.2s ease-in-out;
    --container-width: 1200px;
    --header-height: 70px;
}

/* Resets and base styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-base);
    line-height: 1.6;
    color: var(--color-midnight);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
}

main {
    /* Offset the sticky header so content is not hidden under it */
    padding-top: calc(var(--header-height) + 1rem);
}

a {
    color: var(--color-blue);
    text-decoration: none;
}

a:hover, a:focus {
    text-decoration: underline;
}

h1, h2, h3 {
    font-weight: 600;
    color: var(--color-midnight);
    line-height: 1.3;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; margin-bottom: 0.75rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }

p { margin-bottom: 1rem; }

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1rem;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
    z-index: -9999;
}

.skip-link:focus {
    left: 0;
    top: 0;
    width: auto;
    height: auto;
    padding: 1rem;
    background: var(--color-blue);
    color: var(--color-white);
    z-index: 9999;
}

/* Header */
.site-header {
    background-color: var(--color-midnight);
    color: var(--color-white);
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    display: flex;
    align-items: center;
}

/* Mobile menu button (hamburger) */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle .bar {
    display: block;
    width: 24px;
    height: 2px;
    margin: 4px 0;
    background-color: var(--color-gray);
    transition: transform var(--transition);
}

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

.logo-area .site-title {
    font-size: 1.5rem;
    color: var(--color-white);
    margin-right: 1rem;
}

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 1rem;
}

.main-nav a {
    color: var(--color-gray);
    font-weight: 500;
    padding: 0.5rem;
    border-radius: 4px;
    transition: background-color var(--transition), color var(--transition);
}

.main-nav a:hover,
.main-nav a:focus,
.main-nav a[aria-current="page"] {
    background-color: var(--color-blue);
    color: var(--color-white);
}

.support-cta {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.support-cta a {
    color: var(--color-gray);
    font-weight: 500;
}

.support-cta a:hover,
.support-cta a:focus {
    color: var(--color-blue);
    text-decoration: underline;
}

/* Hero section */
.hero {
    background-color: var(--color-gray);
    padding: 4rem 0 3rem;
    text-align: left;
}

.hero h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--color-midnight);
}

.hero p {
    color: var(--color-slate);
    margin-bottom: 1.5rem;
}

.hero-search {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.hero-search input[type="search"] {
    padding: 0.75rem 1rem;
    border: 2px solid var(--color-blue);
    border-radius: 6px;
    font-size: 1rem;
    flex: 1 1 250px;
    min-width: 0;
}

.hero-search button {
    padding: 0.75rem 1.25rem;
    background-color: var(--color-blue);
    color: var(--color-white);
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color var(--transition);
}

.hero-search button:hover,
.hero-search button:focus {
    background-color: #316CC3;
}

/* Hero grid layout */
.hero-grid {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
}
.hero-text {
    flex: 1 1 50%;
}
.hero-image {
    flex: 1 1 40%;
    display: flex;
    justify-content: center;
}
.hero-image img {
    width: 100%;
    height: auto;
    max-width: 500px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

/* Expert CTA section */
.expert-cta {
    margin-top: 2rem;
    background-color: var(--color-gray);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: left;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}
.expert-cta h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--color-midnight);
}
.expert-cta p {
    margin-bottom: 0.75rem;
    color: var(--color-slate);
}
.expert-cta .btn {
    margin-top: 0.5rem;
}

/* Footer disclaimer */
.disclaimer {
    font-size: 0.8rem;
    color: var(--color-gray);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.25rem;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: background-color var(--transition), color var(--transition);
}

.primary-btn {
    background-color: var(--color-blue);
    color: var(--color-white);
}

.primary-btn:hover,
.primary-btn:focus {
    background-color: #316CC3;
}

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

.secondary-btn:hover,
.secondary-btn:focus {
    background-color: var(--color-blue);
    color: var(--color-white);
}

.buy-btn {
    background-color: var(--color-blue);
    color: var(--color-white);
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
    border-radius: 4px;
    margin-top: 0.5rem;
    display: inline-block;
}

.buy-btn:hover,
.buy-btn:focus {
    background-color: #316CC3;
}

/* Benefits section */
.benefits {
    padding: 3rem 0;
    background-color: var(--color-white);
}

.benefit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
}

.benefit-card {
    background-color: var(--color-gray);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
}

.benefit-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 0.75rem;
    color: var(--color-blue);
}

/* Issues section */
.issues {
    padding: 3rem 0;
    background-color: var(--color-gray);
}

.issue-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.issue-card {
    background-color: var(--color-white);
    border-radius: 6px;
    padding: 1.25rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    border-left: 4px solid var(--color-blue);
}

.issue-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--color-midnight);
}

.issue-card p {
    font-size: 0.95rem;
    color: var(--color-slate);
}

/* Carousel section */
.best-printers {
    padding: 3rem 0;
    background-color: var(--color-white);
}

.carousel {
    position: relative;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.carousel-track {
    display: flex;
    list-style: none;
    gap: 1rem;
    padding-bottom: 0.5rem;
}

.carousel-card {
    flex: 0 0 220px;
    scroll-snap-align: start;
    background-color: var(--color-gray);
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

.carousel-card img {
    width: 100%;
    height: 140px;
    object-fit: cover;
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

.carousel-card h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--color-midnight);
}

/* Footer */
.site-footer {
    background-color: var(--color-midnight);
    color: var(--color-gray);
    padding: 2rem 0;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
    text-align: center;
}

.footer-nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.footer-nav a {
    color: var(--color-gray);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.footer-nav a:hover,
.footer-nav a:focus {
    background-color: var(--color-blue);
    color: var(--color-white);
}

.footer-support a {
    color: var(--color-blue);
}

.legal {
    font-size: 0.8rem;
    color: var(--color-gray);
}

/* Sticky call button */
.sticky-call {
    position: fixed;
    left: 50%;
    bottom: 1rem;
    transform: translateX(-50%);
    background-color: var(--color-green);
    color: var(--color-white);
    padding: 0.75rem 1rem;
    border-radius: 999px;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    z-index: 200;
    display: none; /* hidden by default for desktop */
}

/* Contact form styles */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    margin-top: 1rem;
}

.contact-form .form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 1rem;
}

.contact-form label {
    font-weight: 500;
    margin-bottom: 0.25rem;
    color: var(--color-midnight);
}

.contact-form input,
.contact-form textarea {
    padding: 0.5rem 0.75rem;
    border: 2px solid var(--color-gray);
    border-radius: 6px;
    font-size: 1rem;
    resize: vertical;
    width: 100%;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--color-blue);
    outline: none;
    box-shadow: 0 0 0 3px rgba(59,130,246,0.3);
}

.sticky-call:hover,
.sticky-call:focus {
    background-color: #0f885f;
}

/* Utility: visually hidden */
.visually-hidden {
    position: absolute !important;
    height: 1px;
    width: 1px;
    overflow: hidden;
    clip: rect(1px, 1px, 1px, 1px);
    white-space: nowrap;
}

@media (max-width: 768px) {
    /* Show hamburger and hide traditional nav */
    .menu-toggle {
        display: flex;
    }
    .main-nav {
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: var(--color-midnight);
        display: none;
        flex-direction: column;
        align-items: flex-start;
        padding: 0.5rem 1rem;
        box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    }
    .main-nav.open {
        display: flex;
    }
    .main-nav ul {
        flex-direction: column;
        width: 100%;
        gap: 0;
    }
    .main-nav li + li {
        margin-top: 0.25rem;
    }
    .main-nav a {
        width: 100%;
        padding: 0.75rem 1rem;
        border-radius: 0;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .support-cta {
        flex-direction: column;
        align-items: flex-end;
        gap: 0.25rem;
    }
    .support-email {
        display: none;
    }
    .sticky-call {
        display: inline-block;
    }
    .footer-inner {
        align-items: center;
    }
}