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

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #02040b;
    color: #ffffff;
    overflow-x: hidden;
    position: relative;
}

/* ===================== BACKGROUND ===================== */
.background-overlay {
    position: fixed;
    inset: 0;
    background: linear-gradient(rgba(0,0,0,0.78), rgba(0,0,0,0.88)),
                url('/IA/global-assets/img/fotoIni-en.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: -3;
}

.blue-lights {
    position: fixed;
    inset: 0;
    background: url('/IA/global-assets/img/blue-lights.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.85;
    z-index: -2;
    pointer-events: none;
}

/* ===================== HEADER ===================== */
.main-header {
    width: 100%;
    padding: 22px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(0,180,255,0.15);
    position: sticky;
    top: 0;
    background: rgba(0,0,0,0.45);
    backdrop-filter: blur(12px);
    z-index: 50;
}

.header-logo img {
    width: 260px;
}

/* ===================== NAV ===================== */
.main-nav > ul {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 35px;
}

.main-nav ul li {
    position: relative;
}

.main-nav ul li a {
    text-decoration: none;
    color: #ffffff;
    font-size: 15px;
    transition: 0.3s;
}

.main-nav ul li a:hover {
    color: #00d9ff;
}

/* ===================== DROPDOWN ===================== */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 240px;
    padding: 18px;
    border-radius: 18px;
    background: rgba(5,10,20,0.96);
    border: 1px solid rgba(0,180,255,0.25);
    display: none;
    flex-direction: column;
    gap: 14px;
    z-index: 999;
    list-style: none;
}

.dropdown:hover .dropdown-menu {
    display: flex;
}

/* ===================== HEADER BUTTON ===================== */
.header-button a {
    text-decoration: none;
    padding: 14px 24px;
    border-radius: 10px;
    border: 1px solid #00d9ff;
    color: #ffffff;
    transition: 0.3s;
}

.header-button a:hover {
    background: #00d9ff;
    color: #000;
}

/* ===================== HERO ===================== */
.hero-section {
    width: 100%;
    max-width: 1500px;
    margin: auto;
    padding: 70px 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.hero-left .hero-mini-title {
    color: #00d9ff;
    font-size: 20px;
    display: block;
    margin-bottom: 25px;
}

.hero-left h1 {
    font-size: 68px;
    line-height: 1.08;
    margin-bottom: 30px;
}

.hero-left h1 span {
    color: #00d9ff;
}

.hero-left p {
    font-size: 22px;
    line-height: 1.8;
    color: #dddddd;
    margin-bottom: 35px;
}

/* ===================== HERO FEATURES ===================== */
.hero-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin-bottom: 35px;
}

.hero-features div {
    padding: 15px 18px;
    border-radius: 12px;
    border: 1px solid rgba(0,180,255,0.20);
    background: rgba(0,0,0,0.30);
    color: #00d9ff;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.hero-features div img {
    width: 38px;
    height: 38px;
    object-fit: contain;
}

/* ===================== HERO BUTTONS ===================== */
.hero-buttons {
    display: flex;
    gap: 20px;
}

.hero-buttons a {
    text-decoration: none;
    padding: 18px 28px;
    border-radius: 12px;
    border: 2px solid #00d9ff;
    color: #ffffff;
    font-weight: bold;
    transition: 0.3s;
}

.hero-buttons a:hover {
    background: #00d9ff;
    color: #000;
}

/* ===================== HERO IMAGE ===================== */
.hero-right {
    text-align: center;
}

.hero-right img {
    width: 100%;
    max-width: 760px;
    filter: drop-shadow(0 0 30px rgba(0,220,255,0.25));
}

/* ===================== VIDEOS GRID ===================== */
.videos-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 30px;
}

/* ===================== VIDEO CARD ===================== */
.video-card {
    background: rgba(0,0,0,0.35);
    border: 1px solid rgba(0,180,255,0.20);
    border-radius: 18px;
    padding: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    transition: 0.3s;
}

.video-card img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    margin-bottom: 15px;
    object-fit: cover;
}

.video-card h3 {
    font-size: 24px;
    line-height: 1.4;
    margin-bottom: 10px;
    text-align: center;
}

.video-card p.video-desc {
    font-size: 16px;
    color: #dddddd;
    text-align: center;
}

/* ===================== VIDEO POPUP ===================== */
.video-popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0,0,0,0.88);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 999999;
}

.video-popup-content {
    position: relative;
    width: 80%;
    max-width: 900px;
    aspect-ratio: 16/9;
    background: #000;
    border-radius: 18px;
    overflow: hidden;
    border: 2px solid rgba(0,180,255,0.35);
    box-shadow: 0 0 35px rgba(0,180,255,0.25);
    display: flex;
    justify-content: center;
    align-items: center;
}

.video-popup-content video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.close-video {
    position: absolute;
    top: 12px;
    right: 18px;
    color: #ffffff;
    font-size: 34px;
    cursor: pointer;
    z-index: 2;
}

/* ===================== FOOTER ===================== */
.main-footer {
    width: 100%;
    margin-top: 60px;
    padding: 50px 40px 20px;
    border-top: 1px solid rgba(0,180,255,0.20);
    background: rgba(0,0,0,0.40);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 35px;
    margin-bottom: 35px;
}

.footer-box h3 {
    color: #00d9ff;
    margin-bottom: 20px;
}

.footer-box p,
.footer-box li {
    color: #dddddd;
    line-height: 1.8;
    list-style: none;
}

.footer-logo img {
    width: 240px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(0,180,255,0.10);
    color: #aaaaaa;
    font-size: 14px;
}

/* ===================== SOCIAL ===================== */
.social-box ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.social-box ul li {
    display: flex;
    align-items: center;
    gap: 14px;
    color: #ffffff;
    font-size: 18px;
}

.social-box ul li img {
    width: 38px;
    height: 38px;
    object-fit: contain;
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 1200px) {
    .hero-section,
    .videos-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 850px) {
    .main-header {
        flex-direction: column;
        gap: 25px;
    }
    .main-nav > ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    .hero-buttons {
        flex-direction: column;
    }
    .video-card h3 {
        font-size: 20px;
    }
    .video-card p.video-desc {
        font-size: 14px;
    }
}