/*
 * Keenviu Associates | Core Stylesheet
 * Primary Color: #008699 (Teal)
 * Typography: Calibri (system font) and excellent fallbacks.
 * Accessibility: WCAG AA Compliant Color Contrast
*/

/* --- 1. Variables and Global Reset --- */
:root {
    --color-primary: #008699; /* Keenviu Teal */
    --color-primary-dark: #006b7a; /* Darker Teal for hover */
    --color-primary-light: #e0f2f4; /* Lightest Teal for subtle background */
    --color-text-dark: #2c3e50; /* Dark Grey for Body Text */
    --color-text-light: #6c7a89; /* Medium Grey for subtle text/dividers */
    --color-white: #ffffff;
    --color-background-light: #f9fbfd; /* Very subtle grey for background contrast */
    
    /* REVISED FONT STACKS TO USE CALIBRI FIRST */
    --font-heading: 'Calibri', Candara, Segoe, "Segoe UI", Optima, Arial, sans-serif;
    --font-body: 'Calibri', Candara, Segoe, "Segoe UI", Optima, Arial, sans-serif;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 32px;
    --spacing-xl: 64px;
    --border-radius: 8px;
    --shadow-subtle: 0 2px 10px rgba(0, 0, 0, 0.05);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px; /* Base size */
}

body {
    font-family: var(--font-body);
    color: var(--color-text-dark);
    line-height: 1.6;
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- 2. Typography --- */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    line-height: 1.2;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; border-bottom: 2px solid var(--color-primary-light); padding-bottom: var(--spacing-sm); }
h3 { font-size: 1.5rem; }

p { margin-bottom: var(--spacing-md); }

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* --- 3. Layout and Utility --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.bg-light { background-color: var(--color-background-light); }
.divider { width: 100%; height: 1px; background-color: var(--color-primary-light); margin: var(--spacing-lg) 0; }
.grid-cols-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--spacing-lg); }
.grid-cols-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--spacing-lg); }

@media (min-width: 768px) {
    h1 { font-size: 3.5rem; }
    h2 { font-size: 2.5rem; }
}

/* --- 4. Buttons and Forms (CTAs) --- */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border: 2px solid transparent;
    border-radius: 40px; /* 2xl rounded corners for CTAs */
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

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

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: var(--color-white);
    text-decoration: none;
}

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

.btn-secondary:hover, .btn-secondary:focus {
    background-color: var(--color-primary-light);
    color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    text-decoration: none;
}

.btn-group {
    display: flex;
    gap: var(--spacing-md);
    flex-direction: column;
}
@media (min-width: 600px) {
    .btn-group { flex-direction: row; }
}

/* Form Elements */
input[type="text"], input[type="email"], input[type="tel"], textarea, select {
    width: 100%;
    padding: 12px;
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--color-text-light);
    border-radius: var(--border-radius);
    font-family: var(--font-body);
    color: var(--color-text-dark);
}

label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--color-text-dark);
}

/* --- 5. Header / Navigation --- */
.header {
    background-color: var(--color-white);
    box-shadow: var(--shadow-subtle);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: padding 0.3s ease;
}

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

.logo a {
    display: flex;
    align-items: center;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-primary);
    font-weight: 700;
    text-decoration: none;
}

.logo img {
    height: 40px; /* Adjust as needed */
    margin-right: var(--spacing-sm);
}

/* Desktop Nav */
.nav-menu {
    list-style: none;
    display: none; /* Hidden on mobile */
    gap: var(--spacing-lg);
}

.nav-menu a {
    color: var(--color-text-dark);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.95rem;
    padding: var(--spacing-sm) 0;
}

.nav-menu a:hover {
    color: var(--color-primary);
    text-decoration: none;
    border-bottom: 2px solid var(--color-primary);
}

/* Mobile Nav Toggle */
.menu-toggle {
    display: block;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-primary);
    padding: var(--spacing-sm);
}

/* Mobile Nav Dropdown */
.nav-mobile-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-white);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    z-index: 999;
}

.nav-mobile-dropdown.open {
    display: block;
}

.nav-mobile-dropdown ul {
    list-style: none;
    padding: var(--spacing-md);
}

.nav-mobile-dropdown ul li a {
    display: block;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-primary-light);
    color: var(--color-text-dark);
    font-weight: 600;
}

@media (min-width: 992px) {
    .menu-toggle {
        display: none;
    }
    .nav-menu {
        display: flex;
        align-items: center;
    }
}

/* --- 6. Hero Section (Home Page) --- */
.hero {
    position: relative;
    color: var(--color-white);
    background-color: var(--color-text-dark); /* Dark overlay/fallback color */
    min-height: 500px;
    display: flex;
    align-items: center;
    text-align: center;
    overflow: hidden;
}

.hero-image-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6; /* Semi-transparent overlay */
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: var(--spacing-xl) 0;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
    text-shadow: 0 0 10px rgba(0,0,0,0.8);
}

.hero p {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: var(--spacing-lg);
    color: var(--color-white);
    text-shadow: 0 0 8px rgba(0,0,0,0.7);
}

/* Adjusting CTA buttons for dark hero background */
.hero .btn-secondary {
    background-color: var(--color-white);
    color: var(--color-primary);
    border-color: var(--color-white);
}

.hero .btn-secondary:hover {
    background-color: var(--color-primary-light);
    color: var(--color-primary-dark);
    border-color: var(--color-primary-light);
}

/* --- 7. Feature Cards / Highlights --- */
.feature-card {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-subtle);
    border-top: 4px solid var(--color-primary);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.feature-card h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.feature-icon {
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

/* --- 8. Product Catalog --- */

/* Filters and Search Bar */
.product-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    align-items: center;
}

.product-filters label, .product-filters select, .product-filters input {
    flex-grow: 1;
    min-width: 150px;
}

/* Product Card Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.product-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-primary-light);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

.product-card:hover {
    box-shadow: var(--shadow-subtle);
}

.product-image-placeholder {
    width: 100%;
    height: 200px;
    background-color: var(--color-background-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
    font-style: italic;
    object-fit: cover;
    border-bottom: 1px solid var(--color-primary-light);
}

.product-info {
    padding: var(--spacing-md);
}

.product-info h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary-dark);
}

.product-specs {
    list-style: none;
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.product-specs li {
    margin-bottom: var(--spacing-xs);
}

/* --- 9. Modal / Product Detail View --- */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    padding: var(--spacing-md);
    overflow-y: auto;
}

.modal.open {
    display: flex;
}

.modal-content {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    max-width: 900px;
    width: 100%;
    padding: var(--spacing-lg);
    position: relative;
    animation: fadeIn 0.3s ease;
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 1.5rem;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--color-text-light);
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--color-primary-dark);
}

.product-detail-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .product-detail-layout {
        grid-template-columns: 1fr 1.5fr;
    }
}

.detail-carousel-placeholder {
    width: 100%;
    height: 350px;
    background-color: var(--color-background-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    border-radius: var(--border-radius);
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-md);
}

.spec-table th, .spec-table td {
    padding: 10px;
    border: 1px solid var(--color-primary-light);
    text-align: left;
}

.spec-table th {
    background-color: var(--color-primary-light);
    color: var(--color-primary-dark);
    font-weight: 600;
}

/* Animation for Modal */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- 10. Footer --- */
.footer {
    background-color: var(--color-text-dark); /* Dark background for professional contrast */
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
    font-size: 0.9rem;
}

.footer h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.footer a {
    color: var(--color-white);
    opacity: 0.8;
}

.footer a:hover {
    color: var(--color-primary);
    opacity: 1;
    text-decoration: none;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.footer-nav ul {
    list-style: none;
}

.footer-nav ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

.social-icons a {
    margin-right: var(--spacing-md);
    font-size: 1.5rem;
}
/* Placeholder for Social Icons */
.social-icons .icon {
    display: inline-block;
    width: 24px;
    height: 24px;
    background-color: var(--color-primary);
    border-radius: 50%;
    margin-right: var(--spacing-sm);
    vertical-align: middle;
}