/* Base Styles & Variables */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;700&family=Lato:wght@400;700&display=swap');

:root {
    --font-primary: 'Inter', sans-serif;
    --font-secondary: 'Lato', sans-serif;

    --color-white: #ffffff;
    --color-light-gray: #f8f9fa;
    --color-gray: #6c757d;
    --color-dark-gray: #343a40;
    --color-black: #000000;
    --color-primary: var(--color-black);
    --color-text: var(--color-dark-gray);
    --color-background: var(--color-white);
    --color-background-alt: var(--color-light-gray);

    /* Minimal accent color if needed */
    /* --color-accent-gray: var(--color-gray); */

    --container-width: 1140px;
    --spacing-unit: 1rem; /* Approx 16px */
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-secondary);
    margin-bottom: calc(var(--spacing-unit) * 0.75);
    line-height: 1.3;
    font-weight: 700;
    color: var(--color-black); /* Ensure headings are black */
}

h1 { font-size: 2.5rem; } /* Approx 40px */
h2 { font-size: 2rem; }   /* Approx 32px */
h3 { font-size: 1.75rem; } /* Approx 28px */
h4 { font-size: 1.5rem; }  /* Approx 24px */

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

a {
    color: var(--color-black);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

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

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

.container {
    max-width: var(--container-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: calc(var(--spacing-unit) * 1.5);
    padding-right: calc(var(--spacing-unit) * 1.5);
}

/* Utility Classes */
.btn {
    display: inline-block;
    padding: calc(var(--spacing-unit)*0.6) calc(var(--spacing-unit)*1.2);
    border: 1px solid transparent;
    border-radius: 4px;
    font-weight: 700;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    margin-right: var(--spacing-unit);
}

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

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

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

.btn-secondary:hover {
    background-color: var(--color-light-gray);
    border-color: var(--color-black);
    color: var(--color-black);
    text-decoration: none;
}

section {
    padding: calc(var(--spacing-unit) * 3) 0;
}

.page-title {
    background-color: var(--color-background-alt);
    padding: calc(var(--spacing-unit) * 2) 0;
    text-align: center;
}

.page-title h1 {
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Form styling */
.form-group {
    margin-bottom: var(--spacing-unit);
}

.form-group label {
    display: block;
    margin-bottom: calc(var(--spacing-unit) * 0.25);
    font-weight: bold;
    color: var(--color-black);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: calc(var(--spacing-unit) * 0.5);
    border: 1px solid var(--color-gray); /* Use gray border */
    border-radius: 4px;
    font-family: inherit;
    background-color: var(--color-white);
    color: var(--color-black);
}

.form-group textarea {
    resize: vertical;
}

/* Header Styles */
.site-header {
    background-color: var(--color-white);
    padding: var(--spacing-unit) 0;
    border-bottom: 1px solid var(--color-light-gray);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.site-header .logo img {
    max-height: 40px;
    width: auto;
}

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

.main-nav li {
    margin-left: calc(var(--spacing-unit) * 1.5);
}

.main-nav a {
    text-decoration: none;
    color: var(--color-black); /* Changed nav link color to black */
    font-weight: 700;
    padding: calc(var(--spacing-unit) * 0.5) 0;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-black); /* Underline color black */
    transition: width 0.3s ease;
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

.main-nav a:hover {
    color: var(--color-gray); /* Hover color gray */
    text-decoration: none;
}

.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001; /* Ensure it's above nav */
}

/* Hamburger icon styling */
.mobile-nav-toggle .icon-bar {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-black); /* Changed icon color to black */
    margin: 5px 0;
    transition: transform 0.3s ease, background-color 0.3s ease;
}

/* Footer Styles */
.site-footer {
    background-color: var(--color-black); /* Changed footer background to black */
    color: var(--color-light-gray);
    padding: calc(var(--spacing-unit) * 2.5) 0 0;
    margin-top: calc(var(--spacing-unit) * 3);
}

.site-footer .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.site-footer h4 {
    color: var(--color-white);
    margin-bottom: var(--spacing-unit);
    font-size: 1.1rem;
}

.site-footer ul {
    list-style: none;
    padding: 0;
}

.site-footer li {
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.site-footer a {
    color: var(--color-light-gray);
    text-decoration: none;
}

.site-footer a:hover {
    color: var(--color-white);
    text-decoration: underline;
}

.footer-contact p {
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.footer-social a {
    margin-right: var(--spacing-unit);
    font-size: 1.5rem;
    display: inline-block;
    color: var(--color-light-gray); /* Ensure icons are light */
}

.footer-social a:hover {
    color: var(--color-white);
}

.footer-bottom {
    background-color: var(--color-dark-gray); /* Changed bottom bar to dark gray */
    text-align: center;
    padding: var(--spacing-unit) 0;
    font-size: 0.9rem;
    margin-top: calc(var(--spacing-unit) * 2);
}

.footer-bottom p {
    margin: 0;
    color: var(--color-light-gray); /* Light text on dark background */
}

/* Home Page Styles */
.hero {
    background-color: var(--color-white);
    color: var(--color-black);
    padding: calc(var(--spacing-unit) * 5) 0;
    text-align: center;
}

.hero h1 {
    color: var(--color-black);
    font-size: 3rem;
    margin-bottom: var(--spacing-unit);
}

.hero p {
    color: var(--color-dark-gray);
    font-size: 1.2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: calc(var(--spacing-unit) * 2);
    opacity: 0.9;
}

.cta-buttons .btn {
    margin: 0 calc(var(--spacing-unit) * 0.5);
}

.cta-buttons .btn-primary {
    /* Styles already black background, white text */
}

.cta-buttons .btn-secondary {
    background-color: transparent;
    color: var(--color-black);
    border-color: var(--color-black);
}

.cta-buttons .btn-secondary:hover {
    background-color: var(--color-light-gray);
    color: var(--color-black);
    border-color: var(--color-black);
}

.intro {
    background-color: var(--color-background-alt);
}

.intro h2 {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.intro p {
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    color: var(--color-text); /* Ensure text color is consistent */
}

/* About Us Page Styles */
.about-overview {
    /* Add styles for overview section */
}

.mission-vision .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: calc(var(--spacing-unit) * 3);
}

.mission, .vision {
    background-color: var(--color-background-alt);
    padding: calc(var(--spacing-unit) * 1.5);
    border-radius: 4px;
}

.mission h3, .vision h3 {
    color: var(--color-black);
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.values ul {
    list-style: disc;
    padding-left: calc(var(--spacing-unit) * 1.5);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-unit);
}

.values li {
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

/* Services Page Styles */
.service-section {
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.service-section h2 {
    color: var(--color-black);
    margin-bottom: var(--spacing-unit);
}

.service-section h3 {
    font-size: 1.25rem;
    margin-top: calc(var(--spacing-unit) * 1.5);
    margin-bottom: calc(var(--spacing-unit) * 0.5);
    color: var(--color-black); /* Make subheadings black */
}

.service-section ul {
    list-style: disc;
    padding-left: calc(var(--spacing-unit) * 1.5);
}

.service-section li {
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.general-trading {
    /* Specific styles if needed */
}

.management-consultancy {
    background-color: var(--color-background-alt);
    padding-top: calc(var(--spacing-unit) * 2);
    padding-bottom: calc(var(--spacing-unit) * 2);
}

.management-consultancy ul li strong {
    color: var(--color-black); /* Make strong text black */
}

/* Projects / Marketplace Page Styles */
.marketplace-intro img {
    border: 1px solid var(--color-light-gray); /* Use light gray border */
}

.marketplace-features ul {
    list-style: disc;
    padding-left: calc(var(--spacing-unit) * 1.5);
}

.marketplace-features li {
    margin-bottom: calc(var(--spacing-unit) * 0.75);
}

.marketplace-features li strong {
    color: var(--color-black); /* Make strong text black */
}

/* Contact Page Styles */
.contact-details .container {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: calc(var(--spacing-unit) * 3);
}

.contact-info h2,
.contact-form h2 {
    margin-bottom: var(--spacing-unit);
    color: var(--color-black);
}

.contact-info p {
    margin-bottom: calc(var(--spacing-unit) * 0.75);
}

.social-links-contact a {
    margin-right: var(--spacing-unit);
    color: var(--color-black);
    text-decoration: underline;
}

.social-links-contact a:hover {
    color: var(--color-gray);
}

#form-response {
    margin-top: var(--spacing-unit);
    padding: var(--spacing-unit);
    border-radius: 4px;
    display: none;
}

#form-response.success {
    background-color: #d1e7dd; /* Keep success/error colors for feedback */
    color: #0f5132;
    border: 1px solid #badbcc;
    display: block;
}

#form-response.error {
    background-color: #f8d7da;
    color: #842029;
    border: 1px solid #f5c2c7;
    display: block;
}

/* Careers Page Styles */
.careers-intro {
    background-color: var(--color-background-alt);
}

.job-board h2 {
    margin-bottom: calc(var(--spacing-unit) * 1.5);
}

.job-filters {
    margin-bottom: calc(var(--spacing-unit) * 2);
    display: flex;
    gap: var(--spacing-unit);
    flex-wrap: wrap;
}

.job-filters input[type="text"],
.job-filters select {
    padding: calc(var(--spacing-unit) * 0.5);
    border: 1px solid var(--color-gray);
    border-radius: 4px;
    font-family: inherit;
}

.job-filters input[type="text"] {
    flex-grow: 1;
}

.job-listings {
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.job-listing {
    border: 1px solid var(--color-light-gray);
    padding: calc(var(--spacing-unit) * 1.5);
    margin-bottom: var(--spacing-unit);
    border-radius: 4px;
    background-color: var(--color-white);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.job-listing:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

.job-listing h3 {
    color: var(--color-black);
    margin-bottom: calc(var(--spacing-unit) * 0.25);
}

.job-listing p {
    margin-bottom: calc(var(--spacing-unit) * 0.5);
    color: var(--color-gray);
}

.job-listing .btn {
    margin-top: var(--spacing-unit);
    margin-right: 0;
}

/* Responsive Design */

/* Tablet Styles (<= 992px) */
@media (max-width: 992px) {
    .container {
        max-width: 960px;
    }
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    .mission-vision .container {
        grid-template-columns: 1fr;
    }
    .contact-details .container {
        grid-template-columns: 1fr;
    }
}

/* Mobile Styles (<= 768px) */
@media (max-width: 768px) {
    .container {
        max-width: 720px;
        padding-left: var(--spacing-unit);
        padding-right: var(--spacing-unit);
    }
    h1 { font-size: 2rem; }
    h2 { font-size: 1.6rem; }
    .hero h1 { font-size: 2.5rem; }
    .hero p { font-size: 1.1rem; }

    .site-header .container {
        position: relative;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        border-top: 1px solid var(--color-light-gray);
        border-bottom: 1px solid var(--color-light-gray);
        padding: var(--spacing-unit) 0;
        z-index: 999;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: center;
    }

    .main-nav li {
        margin-left: 0;
        width: 100%;
        text-align: center;
    }

    .main-nav a {
        display: block;
        padding: calc(var(--spacing-unit) * 0.75) var(--spacing-unit);
        border-bottom: 1px solid var(--color-light-gray);
        color: var(--color-black);
    }

    .main-nav li:last-child a {
        border-bottom: none;
    }

    .main-nav a::after {
        display: none;
    }

    .mobile-nav-toggle {
        display: block;
        border: 1px solid var(--color-gray); /* Add subtle border */
        border-radius: 4px;
        padding: 5px; /* Add some padding */
    }

    .site-footer .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-social a {
        font-size: 1.8rem;
    }

    .cta-buttons {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .cta-buttons .btn {
        margin: calc(var(--spacing-unit) * 0.5) 0;
        width: 80%;
        max-width: 300px;
    }

    .job-filters {
        flex-direction: column;
        align-items: stretch;
    }

    .job-filters input[type="text"],
    .job-filters select {
        width: 100%;
    }
}

/* Smaller Mobile Styles (<= 576px) */
@media (max-width: 576px) {
    .container {
        max-width: 540px;
    }
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }
    .hero h1 { font-size: 2rem; }
    .hero p { font-size: 1rem; }

    .site-header .logo img {
        max-height: 35px;
    }
}

/* Microinteractions & Hover Effects */
.btn:hover,
.main-nav a:hover,
.footer-nav a:hover,
.social-links-contact a:hover,
.footer-social a:hover {
    opacity: 0.8;
    transform: translateY(-2px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.logo img:hover {
    opacity: 0.9;
    transition: opacity 0.3s ease;
}

.job-listing:hover {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transform: translateY(-3px);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

/* Accessibility: Focus Styles */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid var(--color-black); /* Use black for focus outline */
    outline-offset: 2px;
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.25); /* Add subtle shadow */
}

.mobile-nav-toggle:focus {
    outline: 2px solid var(--color-black);
    outline-offset: 2px;
}