/* ================================
   BKD — Global Styles
   ================================ */

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background: #f5f7fb;
    color: #1e293b;
    line-height: 1.6;
    padding-top: 75px; /* espacio para el menú fijo */
}

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

.bkd-topnav {
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    background: #0d47a1;
    border-bottom: 2px solid #0a3a86;
    padding: 12px 0;
    z-index: 2000;
}

.bkd-nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 25px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.bkd-nav-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.bkd-nav-logo {
    height: 40px;
    cursor: pointer;
}

.bkd-nav-title {
    color: #e3f2fd;
    font-size: 20px;
    font-weight: 600;
}

.bkd-nav-menu a {
    color: #e3f2fd;
    text-decoration: none;
    margin-left: 24px;
    font-size: 14px;
    font-weight: 400;
    transition: opacity 0.2s;
}

.bkd-nav-menu a:hover {
    opacity: 0.75;
}

/* ================================
   PAGE LAYOUTS
   ================================ */

.container {
    max-width: 950px;
    margin: 40px auto 80px auto;
    background: white;
    padding: 40px 50px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.page-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #0d47a1;
}

h2 {
    font-size: 22px;
    color: #0d47a1;
    margin-top: 40px;
}

h3 {
    font-size: 16px;
    color: #1e293b;
    margin-top: 25px;
}

p, li {
    font-size: 15px;
}

/* ================================
   DIAGRAMS
   ================================ */

.diagram-box {
    margin: 40px 0;
    padding: 30px;
    background: #f1f5ff;
    border: 1px solid #c7d7ff;
    border-radius: 10px;
    text-align: center;
}

.diagram-box img,
.diagram-placeholder img {
    max-width: 100%;
    height: auto;
}

.diagram-placeholder {
    max-width: 100%;
    overflow-x: auto;
    padding: 20px 0;
}

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

footer {
    margin-top: 60px;
    padding: 20px;
    text-align: center;
    color: #475569;
    font-size: 14px;
}

/* ================================
   RESPONSIVE MODE
   ================================ */

@media (max-width: 700px) {
    .bkd-nav-inner {
        flex-direction: column;
        gap: 8px;
    }

    .bkd-nav-menu a {
        margin-left: 12px;
        font-size: 13px;
    }

    .container {
        padding: 25px 20px;
    }
}