/* Genetic Sequencing Company Comparison Website Styles */

/* 1. Base Styles & Reset */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Color Palette */
    --primary-color: #007bff; /* Blue */
    --secondary-color: #6c757d; /* Grey */
    --accent-color: #28a745; /* Green */
    --background-color: #f8f9fa; /* Light Grey Background */
    --surface-color: #ffffff; /* White for cards/modals */
    --text-color: #343a40; /* Dark Grey for body text */
    --heading-color: #212529; /* Even darker for headings */
    --border-color: #dee2e6; /* Light border */
    --light-grey: #e9ecef; /* Lighter grey for subtle backgrounds */
    --hover-color: #e2e6ea; /* Light grey for hover states */
    --shadow-color: rgba(0, 0, 0, 0.1);

    /* Typography */
    --font-family-base: 'Inter', 'Helvetica Neue', Arial, sans-serif;
    --font-family-headings: 'Montserrat', 'Segoe UI', sans-serif;
    --font-size-base: 1rem; /* 16px */
    --font-size-sm: 0.875rem; /* 14px */
    --font-size-lg: 1.125rem; /* 18px */

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;

    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;

    /* Shadow */
    --shadow-sm: 0 1px 3px var(--shadow-color);
    --shadow-md: 0 4px 6px var(--shadow-color);
    --shadow-lg: 0 10px 15px -3px var(--shadow-color);

    /* Transitions */
    --transition-speed: 0.2s;
    --transition-easing: ease-in-out;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    padding: 0; /* Remove initial padding for full width header */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 2. Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-headings);
    color: var(--heading-color);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

h1 {
    font-size: 2.5rem;
    margin-top: var(--spacing-xl);
}

h2 {
    font-size: 2rem;
    margin-top: var(--spacing-lg);
}

h3 {
    font-size: 1.75rem;
    margin-top: var(--spacing-md);
}

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

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-speed) var(--transition-easing);
}

a:hover {
    text-decoration: underline;
    color: #0056b3; /* Darker primary on hover */
}

ul {
    list-style: none;
    padding-left: 0;
}

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

/* 3. Layout - Basic Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%; /* Ensure it takes full width within its parent up to max-width */
}

/* 4. Utility Classes */
.text-center {
    text-align: center;
}

.button, .cta-button {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: background-color var(--transition-speed) var(--transition-easing),
                color var(--transition-speed) var(--transition-easing),
                border-color var(--transition-speed) var(--transition-easing),
                transform var(--transition-speed) var(--transition-easing);
    border: 1px solid transparent; /* Default transparent border */
    text-decoration: none; /* Ensure no underline for buttons */
}

.button-primary, .cta-button {
    background-color: var(--primary-color);
    color: var(--surface-color);
    border-color: var(--primary-color);
}

.button-primary:hover, .cta-button:hover {
    background-color: #0056b3; /* Darker primary */
    border-color: #0056b3;
    transform: translateY(-2px);
}

.button:focus, .cta-button:focus,
input:focus, select:focus, textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.hidden {
    display: none !important;
}

/* 5. Header & Navigation */
header {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
    box-shadow: var(--shadow-sm);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap; /* Allow wrapping on smaller screens */
}

.site-title {
    margin: 0;
    font-size: 1.8rem;
    color: var(--primary-color);
}

header nav ul {
    display: flex;
    gap: var(--spacing-lg);
}

header nav a {
    color: var(--heading-color);
    font-weight: 500;
    padding: var(--spacing-xs) 0;
    position: relative;
}

header nav a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

header nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width var(--transition-speed) var(--transition-easing);
}

header nav a:hover::after,
header nav a:focus::after {
    width: 100%;
}

/* 6. Main Content Area */
main {
    flex-grow: 1; /* Allows main to take up available space */
    padding-top: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
}

/* 7. Hero Section */
#hero-section {
    background-color: var(--surface-color);
    padding: var(--spacing-xl) var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    border-radius: var(--border-radius-md);
    text-align: center;
    box-shadow: var(--shadow-md);
}

#hero-section h2 {
    font-size: 2.2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

#hero-section p {
    max-width: 800px;
    margin: 0 auto var(--spacing-lg) auto;
    font-size: var(--font-size-lg);
    color: var(--secondary-color);
}

/* 8. Company Directory & Controls */
#company-directory {
    margin-bottom: var(--spacing-xl);
}

.filter-sort-controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    background-color: var(--surface-color);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    align-items: center;
}

.filter-sort-controls input[type="text"],
.filter-sort-controls select {
    flex: 1; /* Allows inputs/selects to grow */
    min-width: 150px; /* Minimum width for readability */
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-base);
    color: var(--text-color);
    background-color: var(--background-color);
    transition: border-color var(--transition-speed) var(--transition-easing),
                box-shadow var(--transition-speed) var(--transition-easing);
}

.filter-sort-controls input[type="text"]:focus,
.filter-sort-controls select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

/* Company List Grid */
#company-list.grid-view {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.company-card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-speed) var(--transition-easing),
                box-shadow var(--transition-speed) var(--transition-easing);
    cursor: default; /* Indicate not directly clickable for whole card */
}

.company-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.company-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.company-logo {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: contain;
    border: 1px solid var(--border-color);
    padding: var(--spacing-xs);
    background-color: var(--light-grey);
}

.company-card h3 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--primary-color);
}

.company-card p {
    font-size: var(--font-size-sm);
    color: var(--text-color);
    flex-grow: 1; /* Allows description to take up space */
    margin-bottom: var(--spacing-md);
}

.company-card p strong {
    color: var(--heading-color);
}

.company-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px dashed var(--light-grey);
}

.company-actions .view-details-btn {
    background-color: var(--secondary-color);
    color: var(--surface-color);
    border: 1px solid var(--secondary-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
}

.company-actions .view-details-btn:hover {
    background-color: #5a6268; /* Darker secondary */
    border-color: #5a6268;
    transform: translateY(-1px);
}

.company-actions label {
    display: flex;
    align-items: center;
    font-size: var(--font-size-sm);
    cursor: pointer;
    color: var(--text-color);
    -webkit-user-select: none; /* Safari */
    -moz-user-select: none; /* Firefox */
    -ms-user-select: none; /* IE10+/Edge */
    user-select: none; /* Standard */
}

.company-actions .compare-checkbox {
    margin-right: var(--spacing-xs);
    width: 18px;
    height: 18px;
    accent-color: var(--accent-color); /* For checkbox color */
}

/* 9. Company Detail Modal */
.modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-y: auto; /* Allow scrolling for long content */
    padding: var(--spacing-md);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-speed) var(--transition-easing),
                visibility var(--transition-speed) var(--transition-easing);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--surface-color);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 800px;
    width: 100%;
    position: relative;
    max-height: 90vh; /* Limit height to allow scrolling */
    overflow-y: auto; /* Enable scrolling within the modal content */
    transform: translateY(20px);
    transition: transform var(--transition-speed) var(--transition-easing);
}

.modal.active .modal-content {
    transform: translateY(0);
}

.close-button {
    color: var(--secondary-color);
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    transition: color var(--transition-speed) var(--transition-easing);
}

.close-button:hover,
.close-button:focus {
    color: var(--heading-color);
}

#company-detail-content .company-detail-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

#company-detail-content .company-logo-large {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: contain;
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm);
    background-color: var(--light-grey);
}

#company-detail-content h2 {
    margin: 0;
    font-size: 2rem;
    color: var(--primary-color);
}

#company-detail-content ul {
    list-style: disc; /* Use actual disc for features */
    padding-left: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

#company-detail-content ul li {
    margin-bottom: var(--spacing-xs);
}

/* 10. Comparison Tool */
#comparison-tool {
    margin-bottom: var(--spacing-xl);
}

#selected-companies-for-comparison {
    background-color: var(--light-grey);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    text-align: center;
    color: var(--secondary-color);
    min-height: 50px; /* Ensure some height even when empty */
    display: flex;
    align-items: center;
    justify-content: center;
}

#comparison-table-container {
    overflow-x: auto; /* Enable horizontal scrolling for tables */
    background-color: var(--surface-color);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md);
}

#comparison-table-container table {
    width: 100%;
    border-collapse: collapse;
    min-width: 700px; /* Ensure table doesn't collapse too much */
}

#comparison-table-container th,
#comparison-table-container td {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    text-align: left;
    vertical-align: top;
}

#comparison-table-container th {
    background-color: var(--primary-color);
    color: var(--surface-color);
    font-weight: 600;
    position: sticky; /* Make header sticky for horizontal scroll */
    top: 0;
    z-index: 1; /* Ensure it stays above content */
}

#comparison-table-container tr:nth-child(even) {
    background-color: var(--light-grey);
}

#comparison-table-container td ul {
    list-style: none; /* Remove disc for nested lists in table */
    padding-left: 0;
}

.comparison-logo {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: contain;
    background-color: var(--light-grey);
    border: 1px solid var(--border-color);
    padding: var(--spacing-xs);
    display: block; /* Center if needed */
    margin: 0 auto;
}


/* 11. Footer */
footer {
    background-color: var(--heading-color);
    color: var(--light-grey);
    padding: var(--spacing-xl) 0;
    text-align: center;
    margin-top: var(--spacing-xl); /* Push footer down */
}

footer p {
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--secondary-color);
}

footer p:last-child {
    margin-bottom: 0;
}

/* 12. Responsive Design (Mobile-first approach) */

/* For screens larger than 576px (small tablets, large phones) */
@media (min-width: 576px) {
    .filter-sort-controls {
        justify-content: flex-start; /* Align items to start */
    }
    .filter-sort-controls input[type="text"] {
        flex: 2; /* Search bar takes more space */
    }
}

/* For screens larger than 768px (tablets) */
@media (min-width: 768px) {
    body {
        padding: 0; /* Already handled by header/main container */
    }
    h1 {
        font-size: 3rem;
    }
    h2 {
        font-size: 2.5rem;
    }
    .site-title {
        font-size: 2.2rem;
    }
    #hero-section h2 {
        font-size: 2.8rem;
    }
    .filter-sort-controls {
        flex-wrap: nowrap; /* Keep controls on one line if space allows */
    }
    .filter-sort-controls input[type="text"],
    .filter-sort-controls select {
        flex: 1; /* Distribute space more evenly */
    }
    .company-card {
        padding: var(--spacing-xl);
    }
    .modal-content {
        padding: var(--spacing-xxl);
    }
}

/* For screens larger than 1024px (desktops) */
@media (min-width: 1024px) {
    h1 {
        font-size: 3.5rem;
    }
    header .container {
        padding: 0 var(--spacing-xl);
    }
    main .container {
        padding: 0 var(--spacing-xl);
    }
    .site-title {
        font-size: 2.5rem;
    }
    #hero-section h2 {
        font-size: 3.5rem;
    }
    .company-card {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    }
}

/* For screens larger than 1200px (large desktops) */
@media (min-width: 1200px) {
    .container {
        padding: 0; /* No padding needed as max-width handles it */
    }
}