:root {
    --color-primary: #0066cc; /* Serene clinical blue */
    --color-accent: #66aaff; /* Sophisticated light blue/silver accent */
    --color-text: #333333;
    --color-bg: #f8f8f8;
    --color-light-bg: #ffffff;
    --color-gray-text: #555555;
    --font-heading: 'Merriweather', serif;
    --font-body: 'Montserrat', sans-serif;
    --header-height: 80px;
}

/* Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-primary);
    line-height: 1.2;
    margin-bottom: 0.5em;
}

h1 { font-size: 2.8rem; }
h2 { font-size: 2.2rem; }
h3 { font-size: 1.6rem; }

p {
    margin-bottom: 1em;
    font-size: 1.1rem;
    color: var(--color-gray-text);
}

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

a:hover {
    color: var(--color-accent);
    transform: translateY(-2px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
    position: relative; /* For scroll-reveal */
}

/* Utility Classes */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 5px;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: #0056b3; /* Darker shade of primary */
    border-color: #0056b3;
    color: var(--color-light-bg);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-light-bg);
    transform: translateY(-2px);
}

.section-heading {
    text-align: center;
    margin-bottom: 60px;
    font-size: 2.5rem;
    color: var(--color-primary);
    text-transform: capitalize;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-light-bg);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    z-index: 1000;
    height: var(--header-height);
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}

nav.scrolled {
    background-color: #f0f8ff; /* A slightly darker background */
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    height: 70px;
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    flex-shrink: 0;
}

.nav-links {
    display: flex;
    gap: 30px;
    margin: 0 40px;
}

.nav-links a {
    color: var(--color-text);
    font-weight: 600;
    font-size: 1.05rem;
    position: relative;
    padding: 5px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width 0.2s ease-out;
}

.nav-links a:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-primary);
    margin-bottom: 5px;
    transition: all 0.3s ease;
}

nav.nav-open .hamburger span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
nav.nav-open .hamburger span:nth-child(2) {
    opacity: 0;
}
nav.nav-open .hamburger span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Hero Section */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(rgba(0, 102, 204, 0.75), rgba(0, 102, 204, 0.75)), url('https://via.placeholder.com/1920x1080/0066cc/ffffff?text=Medical+Distribution+Header') no-repeat center center/cover; /* Placeholder image */
    color: var(--color-light-bg);
    padding-top: var(--header-height); /* Offset for fixed nav */
}

#hero h1 {
    font-size: 4.5rem;
    margin-bottom: 20px;
    color: var(--color-light-bg);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.hero-subheading {
    font-size: 1.35rem;
    max-width: 800px;
    margin: 0 auto 40px auto;
    color: rgba(255,255,255,0.9);
}

.hero-ctas {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-ctas .btn-primary {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-text); /* Ensure contrast */
}
.hero-ctas .btn-primary:hover {
    background-color: #4fa1ff; /* Darker accent */
    border-color: #4fa1ff;
}

.hero-ctas .btn-secondary {
    background-color: rgba(255,255,255,0.2);
    border-color: var(--color-light-bg);
    color: var(--color-light-bg);
}
.hero-ctas .btn-secondary:hover {
    background-color: var(--color-light-bg);
    color: var(--color-primary);
    border-color: var(--color-light-bg);
}

/* Stats Section */
#stats {
    background-color: var(--color-primary);
    color: var(--color-light-bg);
    padding: 60px 0;
}

#stats .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    text-align: center;
}

.stat-item .stat-number {
    font-size: 2.8rem;
    font-weight: 700;
    display: block;
    margin-bottom: 5px;
    color: var(--color-accent);
}

.stat-item .stat-label {
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    opacity: 0.9;
    font-weight: 600;
}

/* About Section */
#about {
    background-color: var(--color-light-bg);
    padding: 100px 0;
}

#about .about-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}
#about .about-content p {
    font-size: 1.15rem;
    line-height: 1.8;
}

/* Services Section */
#services {
    background-color: var(--color-bg);
}

.service-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--color-light-bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.service-card h3 {
    color: var(--color-primary);
    font-size: 1.7rem;
    margin-bottom: 15px;
}

.service-card p {
    font-size: 1rem;
    color: var(--color-gray-text);
}

/* Clients Section */
#clients {
    background-color: var(--color-light-bg);
    padding: 60px 0;
}

.client-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 4rem 3rem;
}

.client-logos span {
    color: #999;
    font-size: 1.2rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.7;
    white-space: nowrap; /* Prevent breaking names */
}

/* Work (Case Studies) Section */
#work {
    background-color: var(--color-bg);
}

.case-study-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.case-study-card {
    background-color: var(--color-light-bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.case-study-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.case-study-card .tag {
    display: inline-block;
    background-color: var(--color-accent);
    color: var(--color-primary);
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.case-study-card h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--color-primary);
}

.case-study-card .outcome {
    font-size: 1rem;
    margin-bottom: 20px;
    color: var(--color-gray-text);
}

.case-study-card .read-more {
    font-weight: 600;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

/* Testimonials Section */
#testimonials {
    background-color: var(--color-light-bg);
    padding-bottom: 100px;
}

.testimonial-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background-color: var(--color-light-bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    border-left: 4px solid var(--color-accent);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.testimonial-card blockquote {
    font-style: italic;
    font-size: 1.15rem;
    color: var(--color-gray-text);
    margin-bottom: 15px;
}

.testimonial-card .author {
    font-weight: 600;
    color: var(--color-primary);
    font-size: 0.95rem;
}

/* Team Section */
#team {
    background-color: var(--color-bg);
}

.team-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    text-align: center;
}

.team-card {
    background-color: var(--color-light-bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.team-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.team-card .avatar {
    width: 80px; /* Adjusted size */
    height: 80px; /* Adjusted size */
    border-radius: 50%;
    background-color: var(--color-accent);
    color: var(--color-light-bg);
    font-size: 2.2rem; /* Adjusted font size */
    font-weight: 700;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
    flex-shrink: 0;
}

.team-card h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 5px;
}

.team-card .title {
    font-size: 0.95rem;
    color: #888;
    margin-bottom: 15px;
}

.team-card .bio {
    font-size: 0.9rem;
    color: var(--color-gray-text);
    text-align: center;
}

/* Insights Section */
#insights {
    background-color: var(--color-light-bg);
}

.insight-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.insight-card {
    background-color: var(--color-light-bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.insight-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.insight-card .date {
    display: block;
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.insight-card h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 10px;
}

.insight-card p {
    font-size: 1rem;
    color: var(--color-gray-text);
    margin-bottom: 20px;
}

.insight-card .read-more {
    font-weight: 600;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

/* Contact Section */
#contact {
    background-color: var(--color-bg);
}

#contact .contact-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

#contact .contact-email {
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: 30px;
    margin-bottom: 40px;
}
#contact .contact-email a {
    color: var(--color-primary);
}

#contact-form {
    background-color: var(--color-light-bg);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    display: flex;
    flex-direction: column;
    gap: 20px;
    text-align: left;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-text);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    width: 100%;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(102, 170, 255, 0.2); /* Accent blue glow */
}

#contact-submit {
    align-self: flex-start;
    margin-top: 20px;
}

.form-success {
    background-color: #e6ffe6;
    color: #28a745;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    border: 1px solid #28a745;
}

/* Footer */
footer {
    background-color: #222;
    color: rgba(255,255,255,0.7);
    padding: 60px 0 30px 0;
    font-size: 0.9rem;
}

footer .container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 30px;
    text-align: center;
}

.footer-col {
    flex: 1;
    min-width: 200px;
    display: flex;
    flex-direction: column;
    align-items: center; /* Default center alignment for content */
}

.footer-col.copyright p {
    font-size: 0.9rem;
    margin-bottom: 5px;
    color: rgba(255,255,255,0.7);
}

.footer-col.footer-nav a,
.footer-col.footer-contact p {
    color: rgba(255,255,255,0.7);
    margin-bottom: 8px;
    transition: color 0.2s ease;
}

.footer-col.footer-nav a:hover,
.footer-col.footer-contact a:hover {
    color: var(--color-accent);
}
.footer-col.footer-contact p:first-of-type {
    margin-top: 10px;
}

/* Modal Styling */
#portal-modal {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: none; /* Hidden by default */
    justify-content: center;
    align-items: center;
    z-index: 2000;
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
    transition: opacity 0.3s ease;
    opacity: 0;
}

#portal-modal.open {
    display: flex;
    opacity: 1;
}

.modal-box {
    background-color: var(--color-light-bg);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.25);
    width: 90%;
    max-width: 450px;
    position: relative;
    animation: fadeInScale 0.3s ease-out forwards;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

#modal-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    font-size: 1.8rem;
    color: #888;
    cursor: pointer;
    line-height: 1;
    padding: 5px;
    transition: color 0.2s ease;
}

#modal-close::before {
    content: '×';
}

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

#portal-modal h2 {
    color: var(--color-primary);
    text-align: center;
    margin-bottom: 30px;
    font-size: 2rem;
}

#portal-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

#portal-form .form-group label {
    color: var(--color-primary);
}

#portal-form .btn-primary {
    width: 100%;
    margin-top: 10px;
}

.login-error {
    color: red;
    font-size: 0.875rem;
    margin-top: 15px;
    text-align: center;
}

/* Scroll Reveal Animations */
.reveal-item {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal-item.visible {
    opacity: 1;
    transform: translateY(0);
}

/* CRITICAL scroll-reveal exclusion for modal */
#portal-modal, #portal-modal * {
    opacity: 1 !important;
    transform: none !important;
}


/* Responsive Design */
@media (max-width: 960px) {
    h1 { font-size: 3.5rem; }
    h2 { font-size: 2rem; }
    .nav-links { margin: 0 20px; gap: 20px;}
    .hero-subheading { font-size: 1.2rem; }
    .section-heading { font-size: 2rem; margin-bottom: 40px;}

    .footer-col {
        min-width: 150px;
        flex-basis: 33%;
        align-items: flex-start;
    }
    .footer-col.copyright {
        flex-basis: 100%;
        text-align: center;
        order: 3;
        margin-top: 20px;
        align-items: center;
    }
}

@media (max-width: 768px) {
    nav .container {
        padding: 0 15px;
    }
    .logo {
        font-size: 1.6rem;
    }
    .nav-links {
        display: none; /* Hide by default on mobile */
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: var(--color-light-bg);
        box-shadow: 0 8px 10px rgba(0,0,0,0.1);
        padding: 20px 0;
        text-align: center;
        transform: translateY(-100%);
        transition: transform 0.3s ease-in-out;
        gap: 15px;
    }

    nav.nav-open .nav-links {
        display: flex;
        transform: translateY(0);
    }

    .nav-links a {
        font-size: 1.1rem;
        padding: 10px 0;
        width: 100%;
    }
    .nav-links a::after {
        left: 50%;
        transform: translateX(-50%);
    }
    .nav-links a:hover::after {
        width: 50%;
    }

    .hamburger {
        display: block;
        margin-left: 20px;
        order: 3; /* Position hamburger after portal button */
    }

    #portal-btn {
        order: 2; /* Position portal button before hamburger */
        margin-left: auto;
    }

    #hero h1 { font-size: 3rem; }
    .hero-subheading { font-size: 1.1rem; }
    .hero-ctas { flex-direction: column; gap: 15px;}
    .btn { width: 80%; max-width: 300px; margin: 0 auto; }

    #stats .container {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 20px;
    }
    .stat-item .stat-number { font-size: 2rem; }
    .stat-item .stat-label { font-size: 0.8rem; }

    .service-cards, .case-study-cards, .testimonial-cards, .team-cards, .insight-cards {
        grid-template-columns: 1fr;
    }

    .footer-col {
        flex-basis: 100%;
        align-items: center;
    }
}

@media (max-width: 600px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 1.8rem; }
    section { padding: 60px 0; }

    nav.scrolled { height: 60px; }
    nav { height: var(--header-height); }
    nav.nav-open .nav-links { top: var(--header-height); }

    .btn { padding: 12px 24px; font-size: 0.95rem; }
    .hero-ctas .btn { width: 90%; }
    #portal-btn { padding: 8px 15px; font-size: 0.9rem;}

    .contact-content { padding: 0 10px; }
    #contact-form { padding: 30px; }
}