/* =============================================================================
   CYBER-PHYSICS ENTERPRISE PORTAL
   main.css
============================================================================= */

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

body {
    background: linear-gradient(to top, #2a0845, #04011b);
    background-attachment: fixed;
    color: #ffffff;
    font-family: "Segoe UI", Arial, sans-serif;
    line-height: 1.7;
}

.container {
    width: 90%;
    max-width: 1300px;
    margin: auto;
}

/* ============================================================================
   NAVIGATION
============================================================================ */

nav {
    position: sticky;
    top: 0;
    z-index: 1000;

    background: rgba(4, 1, 27, 0.95);
    backdrop-filter: blur(10px);

    border-bottom: 1px solid rgba(255,255,255,0.08);
}

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

    padding: 18px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo img {
    height: 55px;
}

.logo span {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 2px;
}

.nav-links {
    display: flex;
    gap: 28px;
}

.nav-links a {
    color: #d7d7d7;
    text-decoration: none;
    transition: 0.3s;
}

.nav-links a:hover {
    color: #ffffff;
}

/* ============================================================================
   HERO
============================================================================ */

.hero {
    min-height: 90vh;

    display: flex;
    align-items: center;
    text-align: center;
}

.hero-content {
    width: 100%;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 20px;
    letter-spacing: 4px;
}

.hero h2 {
    font-size: 1.8rem;
    color: #cccccc;
    margin-bottom: 30px;
}

.hero p {
    max-width: 900px;
    margin: auto;
    color: #bdbdbd;
    font-size: 1.1rem;
}

.hero-buttons {
    margin-top: 40px;
}

.btn {
    display: inline-block;

    padding: 14px 28px;
    margin: 10px;

    text-decoration: none;

    border-radius: 5px;

    transition: 0.3s;
}

.btn-primary {
    background: #7c3aed;
    color: white;
}

.btn-primary:hover {
    background: #8f54ff;
}

.btn-secondary {
    border: 1px solid #888;
    color: white;
}

.btn-secondary:hover {
    border-color: white;
}

/* ============================================================================
   SECTIONS
============================================================================ */

section {
    padding: 90px 0;
}

.section-title {
    text-align: center;

    font-size: 2.4rem;

    margin-bottom: 50px;
}

.section-text {
    max-width: 1000px;
    margin: auto;

    text-align: center;

    color: #cfcfcf;
}

/* ============================================================================
   CAPABILITIES
============================================================================ */

.capabilities-grid {
    display: grid;

    grid-template-columns: repeat(auto-fit,minmax(280px,1fr));

    gap: 25px;
}

.card {
    background: rgba(255,255,255,0.05);

    border: 1px solid rgba(255,255,255,0.08);

    padding: 25px;

    border-radius: 12px;
}

.card h3 {
    margin-bottom: 15px;
}

.card p {
    color: #cfcfcf;
}

/* ============================================================================
   FOOTER
============================================================================ */

footer {
    text-align: center;

    padding: 40px 20px;

    border-top: 1px solid rgba(255,255,255,0.08);

    color: #888;
}

/* ============================================================================
   RESPONSIVE MOBILE NAVIGATION
============================================================================ */

.mobile-menu-btn {
    display: none;

    font-size: 1.8rem;

    cursor: pointer;

    color: white;
}

@media (max-width: 1000px) {

    .nav-links {

        display: none;

        position: absolute;

        top: 80px;

        left: 0;

        width: 100%;

        background: rgba(4,1,27,0.98);

        flex-direction: column;

        text-align: center;

        padding: 30px 0;

        gap: 20px;

        border-top: 1px solid rgba(255,255,255,0.08);
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero h1 {
        font-size: 2.4rem;
    }

    .hero h2 {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

}

/* ============================================================================
   PROFESSIONAL FOOTER
============================================================================ */

.enterprise-footer {

    margin-top: 100px;

    background: rgba(0,0,0,0.25);

    border-top: 1px solid rgba(255,255,255,0.08);

    padding: 60px 0 20px 0;
}

.footer-grid {

    display: grid;

    grid-template-columns:
        repeat(auto-fit, minmax(220px, 1fr));

    gap: 40px;
}

.footer-column h3 {

    margin-bottom: 20px;

    color: white;

    font-size: 1.1rem;
}

.footer-column a {

    display: block;

    margin-bottom: 12px;

    color: #cfcfcf;

    text-decoration: none;

    transition: 0.3s;
}

.footer-column a:hover {

    color: white;
}

.footer-column p {

    color: #cfcfcf;

    margin-bottom: 12px;
}

.footer-bottom {

    margin-top: 50px;

    padding-top: 25px;

    border-top: 1px solid rgba(255,255,255,0.08);

    text-align: center;

    color: #888;
}

.diagram-image {

    width: 100%;

    max-width: 1200px;

    display: block;

    margin: 40px auto;

    border-radius: 12px;

    box-shadow: 0 10px 40px rgba(0,0,0,0.35);
}

.diagram-grid {

    display: grid;

    grid-template-columns:
        repeat(auto-fit,minmax(350px,1fr));

    gap: 30px;
}

.diagram-grid img {

    width: 100%;

    border-radius: 10px;

    box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}

/* ============================================================================
   DOCUMENTATION CENTER
============================================================================ */

.docs-grid {

    display: grid;

    grid-template-columns:
        repeat(auto-fit, minmax(320px, 1fr));

    gap: 30px;

    margin-top: 50px;
}

.doc-card {

    background: rgba(255,255,255,0.03);

    border: 1px solid rgba(255,255,255,0.08);

    border-radius: 12px;

    padding: 30px;

    transition: 0.3s;
}

.doc-card:hover {

    transform: translateY(-6px);

    border-color: rgba(0,120,255,0.5);
}

.doc-card h3 {

    margin-bottom: 15px;

    color: white;
}

.doc-card p {

    margin-bottom: 25px;

    color: #cfcfcf;

    line-height: 1.7;
}

/* ============================================================================
   RESEARCH METRICS
============================================================================ */

.metrics-section {

    margin-top: 80px;
}

.metrics-grid {

    display: grid;

    grid-template-columns:
        repeat(auto-fit,minmax(220px,1fr));

    gap: 25px;
}

.metric-card {

    text-align: center;

    padding: 30px;

    background: rgba(255,255,255,0.03);

    border: 1px solid rgba(255,255,255,0.08);

    border-radius: 12px;
}

.metric-card h2 {

    font-size: 3rem;

    margin-bottom: 10px;

    color: white;
}

.metric-card p {

    color: #cfcfcf;
}

/* ==========================================================
   EVALUATION OBJECTIVES LIST
========================================================== */

.evaluation-list {

    list-style: none;

    margin: 25px 0;

    padding: 0;

}

.evaluation-list li {

    position: relative;

    padding-left: 28px;

    margin-bottom: 14px;

    color: #d8d8d8;

    line-height: 1.8;

    font-size: 1rem;

}

.evaluation-list li::before {

    content: "✓";

    position: absolute;

    left: 0;

    color: #4CAF50;

    font-weight: bold;

}

.document-version{

    margin-top:15px;

    font-size:.9rem;

    color:#9aa7b3;

    letter-spacing:.5px;

}

.figure-caption{

    text-align:center;

    color:#9aa7b3;

    font-size:.95rem;

    margin-top:12px;

    font-style:italic;

}