/* ============================
   MENÚ SUPERIOR – IZQUIERDA
   ============================ */

header {
    width: 100%;
    position: sticky;   /* evita banda blanca y solapamientos */
    top: 0;
    left: 0;
    z-index: 1000;
}

.top-menu {
    background: rgba(0, 48, 73, 0.85);
    backdrop-filter: blur(6px);
    display: flex;
    justify-content: flex-start;
    align-items: center;
    padding: 12px 20px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.45);
}

.top-menu a {
    color: white;
    text-decoration: none;
    margin-right: 28px;
    font-size: 18px;
    font-weight: 500;
    transition: color 0.3s ease;
}

.top-menu a:hover {
    color: #a8d8ff;
}

/* ============================
   SUBMENÚ – IZQUIERDA
   ============================ */

.sub-menu {
    background: rgba(0, 35, 55, 0.92);
    display: flex;
    justify-content: flex-start;
    align-items: center;
    padding: 8px 20px;
    gap: 28px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.35);
}

.submenu-title {
    color: #ffffff;
    font-size: 16px;
    font-weight: 600;
    padding-bottom: 2px;
    border-bottom: 2px solid #ffffff;
}

.sub-menu a {
    color: #e8f4ff;
    text-decoration: none;   /* evita subrayado */
    font-size: 15px;
    transition: color 0.3s ease;
}

.sub-menu a:hover {
    color: #ffffff;
}

/* ============================
   ESPACIADO GENERAL
   ============================ */

body {
    margin: 0;
    font-family: Arial, sans-serif;
}

/* ============================
   IMAGEN A PANTALLA COMPLETA
   ============================ */

.hero {
    position: relative;
    width: 100%;
    height: calc(100vh - 82px); /* AJUSTE REAL */
    overflow: hidden;
}

.hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    filter: brightness(65%);
}

/* ============================
   TEXTO CENTRADO SOBRE LA IMAGEN
   ============================ */

.hero-text {
    position: absolute;
    top: 5%;   /* recuperado tu ajuste personalizado */
    left: 48%;
    transform: translateX(-50%);
    text-align: center;
    color: white;
}

.hero-text h1 {
    font-size: 20px;
    margin: 0;
    text-shadow: 0 2px 6px rgba(0,0,0,0.6);
}

/* ============================
   BLINDAJE GENERAL
   ============================ */

* {
    box-sizing: border-box;
}

html, body {
    width: 100%;
    overflow-x: hidden;
}